KR20150028636A - Autostereoscopic display device - Google Patents

Abstract

The present invention relates to an autostereoscopic display device. The present invention includes: a transparent supporting film (1); a lenticular lens layer (2) which is located on one side of the transparent supporting film; a planarization layer (3) which is located on the lenticular lens layer; a glass substrate (4) which is located on the planarization layer; a diffusion layer (5) which is located on the glass substrate; and an adhesive (6) which is located on the diffusion layer. According to the present invention, the autostereoscopic display device reduces band moire caused by the non-uniformity of the image illumination, improves visibility, and is light and thin by reducing external light reflection.

Description

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

The present invention relates to a non-eyeglass stereoscopic image display apparatus.

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 is disadvantageous in that the light emitted from the display element is blocked by the barrier, the brightness of the display is lowered and the implementation of the multi-point is difficult. In the integral method and the hologram method, In recent years, the lenticular method has attracted attention as a point-of-view stereoscopic image method.

A representative non-eyeglass stereoscopic image apparatus to which the lenticular method is applied is shown in Fig. 1, a lenticular-type non-spectacle stereoscopic image apparatus 1 is provided with a semi-cylindrical lenticular lens (not shown) on the front surface of a flat panel display element made up of a display panel 20 such as an LCD, a PDP, A lenticular lens sheet 10 in which lenses 11 are arranged in the column direction of the display pixels 21 is provided and each lenticular lens 11 is arranged on adjacent columns composed of two or more display pixels.

For example, if each lenticular lens is arranged corresponding to two columns of pixels, the pixels in the two rows provide respective vertical sub-images (left / right image images) and the lenticular sheet provides these two vertical sub-images and the other lenticular lenses Pixel images corresponding to the display pixel columns associated with the lenticular sheet are projected on the left and right eyes of the viewer viewing from the front of the lenticular sheet so that the viewer can view a single stereoscopic image.

The above-described lenticular lens system can produce a non-eyeglass stereoscopic image display having good luminance. However, there is a problem that the views projected by the lenticular lens sheet are separated by a dark zone caused by the imaging of the non-luminescent black matrix (BM) defining the display pixel array. These dark zones are easily observed by viewers in the form of luminance non-uniformity in the form of dark vertical bands spaced across the display (band moiré). The bands are moved along the display as the viewer moves from left to right and the width of the bands changes as the viewer approaches or distances the display.

Several methods have been proposed to reduce the intensity of the luminance non-uniformity (band moire). For example, U.S. Patent No. 6,064,424 proposes a method for minimizing resolution reduction and reducing the intensity of luminance non-uniformity in multiple views by arranging lenticular lenses at an acute angle to the column direction of the display pixel array. However, there remains a problem that it is difficult to reduce the luminance non-uniformity by imaging the black matrix to 1% or less, and still being perceived by viewers.

In Korean Patent Laid-Open Publication No. 2011-0016461, a second layer (n2) lower than the refractive index n1 of the lens layer is formed on the positive lenticular lens layer, and a lens having a curvature radius of n1x (p / 2R) .

In Korean Patent Laid-Open Publication No. 2011-0036916, a view forming module provides a view forming function and a brightness non-uniformity reducing function, and a micro lens array or a photodetector smaller than the pitch of a lenticular lens is used. It has been reported that the non-uniformity of the luminance can be satisfactorily reduced by the above method.

However, the microlens array or diffuser which functions to reduce the brightness non-uniformity may be provided on a separate glass substrate or may be disposed on the back surface of the glass substrate constituting the lenticular lens, There is a drawback in that a plate is required to be lightweight and thin and there is a disadvantage in that visibility is still lowered because the air gap existing in each plate lowers the bright room contrast.

Therefore, it is necessary to provide a stereoscopic image capturing apparatus of a lightweight, thin, and non-spectacle type, while preventing generation of band moir, minimizing reflection of external light and improving visibility.

US 6064424 A KR 2011-0016461 A KR 2011-0036916 A

Accordingly, it is an object of the present invention to provide a stereoscopic image capturing apparatus of a non-eyeglass type which is lightweight and thin, which prevents band moiré occurrence and minimizes reflection of external light, thereby improving visibility.

In order to achieve the above object,

(1) a transparent support film;

(2) a lenticular lens layer located on one surface of the transparent support film;

(3) a planarization layer located on the lenticular lens layer;

(4) a glass substrate positioned on the planarization layer;

(5) a diffusion layer located on the glass substrate; And

(6) The pressure-sensitive adhesive layer or the adhesive layer

Eye stereoscopic image display device.

The non-eyeglass stereoscopic image display apparatus according to the present invention is capable of reducing band moiré caused by non-uniform brightness of an image, reducing visibility of external light, improving visibility, and being lightweight and thin.

1 is a diagram schematically showing a non-eyeglass stereoscopic image apparatus to which a conventional lenticular system is applied.
2 is a cross-sectional view of a non-eyeglass stereoscopic image display device according to an example of the present invention.

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

The non-eyeglass stereoscopic image display device of the present invention comprises (1) a transparent support film; (2) a lenticular lens layer located on one surface of the transparent support film; (3) a planarization layer located on the lenticular lens layer; (4) a glass substrate positioned on the planarization layer; (5) a diffusion layer located on the glass substrate; And (6) a pressure-sensitive adhesive layer or an adhesive layer positioned on the diffusion layer.

(1) Transparent supporting film

The transparent support film is preferably a transparent plastic. The transparent support film should have good adhesion with the binder resin, transmittance of light incident from the rear surface should be 90% or more, and smoothness of the surface should be uniform. The thickness of the transparent support film may be 50 to 250 占 퐉, preferably 70 to 210 占 퐉, and more preferably 100 to 188 占 퐉. Specific examples of suitable materials for the transparent support film include polyether sulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate It is also possible to use polyethylene terephthalate (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 may be used.

(2) Lenticular lens layer

The lenticular lens layer is disposed on one side of the transparent support film, and the lenticular lens layer may be formed by lenticular lens shape on one side of the transparent support film. For example, a lenticular lens having a convex shape can be formed by applying a binder resin to one surface of a transparent plastic constituting the transparent support film, by roll molding using a roll having a predetermined pattern, and then curing have.

As the binder resin, conventionally used thermosetting resins and UV-setting resins can be used. For example, acrylic, urethane, epoxy, vinyl, polyester, polyamide resins or mixtures thereof can 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.

The size of each lenticular lens constituting the lenticular lens layer may be a size typically used depending on the resolution and the pixel size of the display device or the viewing distance. For example, the size may be about 0.01 to 10 mm, 0.05 to 8 mm, 0.1 to 5 mm Lt; / RTI > radius. The lenticular lens may be aspherical.

(3) planarization layer

A planarizing layer is disposed on the lenticular lens layer. The planarization layer may be disposed to cover the lenticular lens of the lenticular lens layer. The planarization layer may have a thickness of 0.1 to 100 탆, preferably 10 to 50 탆, so that the other surface of the lenticular lens- have.

The planarization layer has a refractive index lower than that of the lenticular lens layer, and the refractive index difference may be 0.01 to 0.2, preferably 0.05 to 0.15.

The planarization layer may be formed of acrylic, silicone, fluorine resin, or a mixture thereof. 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.

The planarization layer may be formed by a method such as gravure roll coating, die coating, comma coating or gap coating.

(4) Glass substrate

A glass substrate is placed on the planarization layer. The glass substrate is attached to the planarizing layer through an adhesive agent.

Preferable examples of the adhesive agent include an acrylic adhesive, an urethane adhesive, an epoxy adhesive, and a silicone adhesive.

The thickness of the glass substrate may be 0.1 to 30 mm, preferably 0.2 to 20 mm, and more preferably 0.5 to 12 mm. The thickness of the glass substrate depends on the resolution of the display device and the pixel size or viewing distance and 3D depth. When the thickness of the glass substrate is 0.1 mm or more, a proper 3D depth sense or stereoscopic effect can be exhibited, and when the thickness is 12 mm or less, the non-spectacle stereoscopic image display apparatus can be lightweight and thin.

(5) Diffusion layer

A diffusion layer is located on the glass substrate.

The diffusion layer positioned on the glass substrate is a layer formed for diffusing light and is formed by applying a plastic resin composition containing a plastic resin and beads to the glass substrate and then curing the composition, And then adhering them using an adhesive agent as described in item (4) above.

When the diffusion layer is formed by applying a plastic resin composition to a glass substrate, the diffusion layer may be formed by gravure roll coating, die coating, comma coating, or gap coating.

The plastic resin may preferably be a thermosetting resin, and the thermosetting resin is not particularly limited as long as it can be cured by heat, and specific examples thereof include polyesters; Epoxy resin; (Meth) acrylate resins such as polyester (meth) acrylate, epoxy (meth) acrylate and urethane (meth) acrylate; And mixtures thereof. Among them, a (meth) acrylate resin is particularly preferable from the viewpoint of optical characteristics.

The beads may be organic polymer beads comprising a material selected from the group consisting of hard acrylate, polystyrene, nylon, soft acrylate and silicone. Among them, hard acrylate having good solvent resistance and easy dispersion is preferable. The beads are preferably spherical, and may have an average particle diameter of 2 to 10 mu m, preferably 2 to 5 mu m.

The plastic composition of the diffusion layer may include a plastic resin and beads in a weight ratio of 10: 1 to 1:10, preferably 5: 1 to 1: 5.

The diffusion layer may be prepared by mixing the plastic resin and the beads and stirring the resulting plastic resin composition onto a surface of a transparent plastic support, followed by drying and curing.

The support may be selected from the group consisting of polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate Polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate (PC), cellulose triacetate (TAC), cellulose acetate propionate (CAP) Or a mixture thereof, and may preferably be polyethylene terephthalate, polycarbonate, cellulose triacetate, or polyacrylate.

The refractive index of the diffusion layer may be 1.3 to 1.8, 1.35 to 1.7, 1.35 to 1.65, 1.4 to 1.7, 1.4 to 1.65, or 1.4 to 1.6, preferably 1.45 to 1.55, Ra can be from 1 to 3 mu m, and preferably from 1.5 to 2.5 mu m.

(6) A pressure-sensitive adhesive layer or an adhesive layer

A pressure-sensitive adhesive layer or an adhesive layer is disposed on the diffusion layer.

The pressure-sensitive adhesive and the adhesive are distinguished according to whether the pressure-sensitive adhesive is cured after the pressure-sensitive adhesive or the pressure-sensitive adhesive. The pressure-sensitive adhesive is not cured and the adhesive is cured.

The pressure-sensitive adhesive layer or the adhesive layer can be formed by applying a pressure-sensitive adhesive or an adhesive composition constituting the pressure-sensitive adhesive layer or the adhesive layer on the diffusion layer. Examples of the pressure-sensitive adhesive or adhesive include adhesives or adhesives such as acrylic, urethane, epoxy, , Preferably an acrylic pressure-sensitive adhesive or an adhesive.

N1 and n2 satisfy 0 < n1 - n2 when the refractive index of the pressure sensitive adhesive layer or the adhesive layer is smaller than the refractive index of the diffusion layer and the refractive index of the diffusion layer is n1 and the refractive index of the pressure sensitive adhesive layer or adhesive layer is n2, n2 &lt; 0.1.

It is possible to prevent the reflection at the interface between the pressure-sensitive adhesive layer or the adhesive layer and the diffusion layer when the refractive index of the diffusion layer is equal to or larger than the refractive index of the pressure-sensitive adhesive layer or the adhesive layer (0? N1-n2) (N1 - n2 < 0.1) diffusibility is set to a proper level if the difference between the refractive index of the diffusion layer and the refractive index of the adhesive layer or the adhesive layer is less than 0.1 Thereby preventing an increase in haze, so that the visibility of the image can be made to an appropriate level.

The thickness of the pressure-sensitive adhesive layer or the adhesive layer may be 10 to 1,000 占 퐉, preferably 25 to 500 占 퐉.

(7) Antireflection layer

The non-eyeglass stereoscopic image display apparatus of the present invention may further include an anti-reflection layer positioned on the other surface of the transparent support film.

The antireflection layer may be formed in such a manner that the antireflection layer is formed on the other surface of the transparent support film through coating or an antireflection layer is formed on a separate support and then the antireflection film is attached thereto using a pressure sensitive adhesive or an adhesive have.

The anti-reflection layer is disposed on the transparent support film to reduce irregular reflection on the viewing surface of the spectacle-free three-dimensional image display device, thereby reducing haze and exhibiting high light transmittance. It is also possible to perform the function as a hard coating layer which prevents the occurrence of scratches on the surface by increasing the surface hardness of the transparent support film.

The antireflection layer may be formed of a resin such as a thermoplastic resin, a thermosetting resin, or an ionizing radiation curable resin. The antireflection layer is preferably made of ionizing radiation (ultraviolet ray or electron beam) curable resin so as to exhibit high hard coating properties, .

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 and curing can be particularly preferably used 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 by irradiation of ultraviolet rays, the hard coat layer may further include a photopolymerization initiator in addition to the photopolymerizable prepolymer and the photopolymerizable monomer described above.

As the photopolymerization initiator, any conventional initiator generally used for curing the ultraviolet curable resin can be used, and examples thereof 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 per 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 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 non-eyeglass stereoscopic image display device of the present invention

(1) A binder resin is applied to one surface of a transparent support film, and the resulting film is roll-molded using a roll having a predetermined pattern and then hardened to form a lenticular lens layer having a convex shape, Forming a planarization layer on the layer to produce a lenticular lens film;

(2) if necessary, directly forming an antireflection layer on the other surface of the transparent support film or laminating the antireflection film using an adhesive or an adhesive to produce a composite film;

(3) attaching the prepared composite film to a glass substrate using an adhesive or an adhesive;

(4) forming a diffusion layer on the other surface of the glass substrate on which the composite film is adhered; And

(5) forming a pressure-sensitive adhesive layer or an adhesive layer on the diffusion layer.

The non-eyeglass stereoscopic image display device of the present invention manufactured as described above can be attached to a liquid crystal display panel through an adhesive or an adhesive.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

2 is a cross-sectional view of a non-eyeglass stereoscopic image display apparatus according to an exemplary embodiment of the present invention.

2, a non-eyeglass stereoscopic image display device according to an exemplary embodiment of the present invention includes a lenticular lens layer 112 located on one side of a transparent support film 111, a planarization layer (not shown) disposed on a lenticular lens layer 112 113, a glass substrate 120 located on the planarization layer 113, a diffusion layer 130 located on the glass substrate 120, and an adhesive layer 140 located on the diffusion layer 130 And an antireflection layer 150 located on the other side of the transparent support film 111.

The transparent support film 111, the lenticular lens layer 112 and the planarization layer 113 constitute the lenticular lens film 110 and include the antireflection layer 150 located on the other surface of the transparent support film 111 Thereby constituting a composite film. The composite film may be attached to the glass substrate 120 using an adhesive agent 160. The non-eyeglass stereoscopic image display device can be attached to the display panel 200 through the adhesive layer 140 positioned on the diffusion layer 130.

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

&Lt; Preparation of lenticular lens film &

A resin having a refractive index of 1.6 (SH575, manufactured by APKY CHEMICAL INDUSTRIAL CO., LTD.) Was coated on one surface of a transparent support film made of PET having a thickness of 188 탆 by using a mold, and then a mold was used to measure a radius of 0.55 mm and a height of 57.5 탆, a lenticular lens layer having a pitch of 500 mu m was formed on the lenticular lens layer and an acrylic resin having a refractive index of 1.5 after SHC was applied onto the lenticular lens layer by a gap coating to form a planarization layer to produce a lenticular lens film . A hard coating (JGC) layer having a refractive index of 1.62 was formed on the other surface of the transparent support film, and then a resin composition (P5063, manufactured by JGC) containing a fluorosiloxane group having a refractive index of 1.38 was applied by a slot die to form an anti- To prepare a composite film.

&Lt; Preparation of Diffusion Layer &

A hard acrylic acrylate bead (MZ1000, Soken Co., average particle size 10 占 퐉) having a spherical refractive index of 1.49 and an acryl-based resin binder (A818, manufactured by Akebon Chemical Industry Co., Ltd.) 1 was coated by gravure coating and then cured at 100 ° C for 3 minutes to prepare a diffusion film having a surface roughness Ra of 2.5 mu m, a refractive index of 1.49, and a thickness of 10 mu m.

&Lt; Fabrication of spectacle stereoscopic image display device >

The composite film obtained through the production of the lenticular lens film was attached to one side of a soda lime glass substrate (made by KCC) having a thickness of 8 mm by using a pressure-sensitive adhesive (X-313, manufactured by Siden Co.) made of acrylic resin. The diffusing film was attached to the other surface of the glass substrate using a pressure-sensitive adhesive (X-313, manufactured by Siden) in the form of acrylic resin. After the diffusion layer was disposed so as to face the liquid crystal display device, a silicone adhesive (EE1741, Dow Corning) having a refractive index of 1.41 was applied by die coating to form an adhesive layer and then attached to the liquid crystal display device, A stereoscopic image display device was manufactured.

Example  2

In the preparation of the diffusion layer, a composition using hard acrylate beads (Sokenna) having a particle diameter of 5 占 퐉 and a refractive index of 1.49 was prepared and cured at 80 占 폚 for 3 minutes to prepare a composition having a surface roughness Ra of 2.0 占 퐉, a refractive index of 1.49, And a diffusion film in which a diffusion layer having a thickness of 5 占 퐉 was formed were manufactured in the same manner as in Example 1, except that a spectacle-free three-dimensional image display device was manufactured.

Comparative Example  One

In the preparation of the diffusion layer, a composition having an acrylic resin and beads in a weight ratio of 2.5: 1 was prepared using hard acrylate beads (OPT6000, manufactured by Nissan Chemical Co., Ltd.) having a particle diameter of 10 탆 and a refractive index of 1.67, , And then cured at 80 DEG C for 3 minutes to prepare a diffusion film having a surface roughness Ra of 4.0 mu m, a refractive index of 1.62, and a thickness of 10 mu m formed thereon, and a non-spectacle stereoscopic image display Device.

Comparative Example  2

In the preparation of the diffusion layer, a composition in which the acrylic resin and the beads were 2.5: 1 in weight ratio was prepared using hard acrylate beads (OPT7000, Nissan Chemical Co.) having a particle diameter of 20 탆 and a refractive index of 1.67, And then cured at 80 DEG C for 3 minutes to prepare a diffusion film having a surface roughness Ra of 4.0 mu m, a refractive index of 1.62, and a thickness of 20 mu m formed thereon, and a non-spectacle three- .

Comparative Example  3

Example 1 was repeated except that a diffusion layer was not formed and a sodalime glass substrate (made by KCC) having a thickness of 8 mm in which one surface was subjected to a sandblasting treatment to impart surface unevenness was used and a composite film was attached to the other surface A spectacle-free stereoscopic image display device was manufactured in the same manner. The sodalime glass substrate had a surface roughness Ra of 4.0 m and a haze of 94%. At this time, the above-described sandblasting treatment was performed so that the surface provided with the surface irregularities faced the direction of the liquid crystal display device, and then adhered through the adhesive layer, thereby manufacturing a spectacle-free three-dimensional image display device.

The parallel light transmittance, haze, total light transmittance, and visible light reflectance of the spectacle-free stereoscopic image display device according to Examples and Comparative Examples were measured in the following manner, and the values thereof are shown in Table 1 below.

Parallel light  Transmittance, Hayes  And All light  Measurement of transmittance

Generally, the haze and the total light transmittance,

Haze (%) = diffused light (DT) / transmitted light (TT)

Total transmitted light (TT) = parallel light (PT) + diffused light (DT)

Total light transmittance (%) = Total transmitted light (TT) / Total incident light

, And the parallel light transmittance, haze, and total light transmittance were measured using Haze meter NDH-5000 manufactured by Nihon Shotoku Co., Ltd.

Measurement of visible light reflectance

The visible light reflectance means the mirror reflectance which is the same as the incident angle and the reflection angle. The D65 light source and the 10 degree reference are measured with a U4100 instrument of Hitachi Co., Ltd., with the back surface exposed to the air.

Parallel light transmittance
(%) Hayes
(%) Total light transmittance
(%) Visible light reflectance
(%) Example 1 63.34 29.71 90.11 2.0 Example 2 61.72 30.82 89.22 2.1 Comparative Example 1 13.3 85.96 94.73 2.5 Comparative Example 2 8.22 91.07 92.1 2.7 Comparative Example 3 42.38 54.67 93.5 2.2 Evaluation device / method Japan full color NDH5000
D65 light source Hitachi, U4100
D65 light source

1: no-glasses stereoscopic image apparatus 10: lenticular lens sheet
11: Lenticular lens 20: Display panel
21: display pixel 30: backlight unit
110: Lenticular lens film 111: Transparent supporting film
112: lenticular lens layer 113: planarization layer
120: glass substrate 130: diffusion layer
140: adhesive layer 150: antireflection layer
160: Attachment 200: Display panel

Claims (9)

(1) a transparent support film;
(2) a lenticular lens layer located on one surface of the transparent support film;
(3) a planarization layer located on the lenticular lens layer;
(4) a glass substrate positioned on the planarization layer;
(5) a diffusion layer located on the glass substrate; And
(6) The pressure-sensitive adhesive layer or the adhesive layer
Eye stereoscopic image display device.
The method according to claim 1,
And an anti-reflection layer positioned on the other surface of the transparent support film.
The method according to claim 1,
And a display panel disposed on the adhesive layer or the adhesive layer.
The method according to claim 1,
When the refractive index of the diffusion layer is n1 and the refractive index of the pressure-sensitive adhesive layer or the adhesive layer is n2,
0 < n1 - n2 &lt; 0.1.
The method according to claim 1,
Wherein the planarization layer has a refractive index lower than that of the lenticular lens layer.
The method according to claim 1,
Wherein the diffusion layer has a surface roughness Ra of 1 to 3 占 퐉.
The method according to claim 1,
Wherein the diffusion layer comprises a plastic resin composition comprising a plastic resin and beads.
8. The method of claim 7,
Wherein the bead has an average particle diameter of 2 to 10 mu m.
8. The method of claim 7,
Wherein the plastic resin composition comprises a plastic resin and beads in a weight ratio of 5: 1 to 1: 5.

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