KR20150025672A - Patterned retarder and diplay device comprising the same - Google Patents

Abstract

The present invention relates to a patterned retarder and, more specifically, to the patterned retarder which comprises a light luminescence layer including light luminescence materials. When the patterned retarder is applied on a display to directly display a laser pointer on a display, the patterned retarder emits light when stimulated by light. Therefore visibility of the laser pointer is greatly improved.

Description

TECHNICAL FIELD [0001] The present invention relates to a patterning retarder and an image display device having the patterning retarder.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a patterning retarder and an image display apparatus having the patterning retarder, and more particularly, to a patterning retarder capable of improving the visibility of a laser pointer and an image display apparatus having the patterning retarder.

Conventionally, in a presentation such as a meeting or a presentation, it has been often done to project a data image on a screen or a wall using a projector. At this time, the presenter generally uses a laser pointer for projecting laser light at any place on the presentation image, and performs presentation while pointing to a screen or the like. However, in the case of the screen projection using the projector, there is a problem that the contrast is lowered or the image quality is deteriorated in the projected image.

In recent years, liquid crystal displays (LCDs) and plasma displays (PDPs) have been made larger than 70 inches in size, so that it is possible to display images directly on these displays themselves instead of projector projection, A display device capable of realizing a 3D image due to the development of video contents has been developed, and it is becoming possible to perform a presentation using a liquid crystal display (LCD) or a plasma display (PDP) capable of realizing a 3D image. As a method for realizing a 3D image, a polarized spectacle method using a patterned retarder has been applied.

However, when the presentation is performed by direct display using such a display, there is a problem that the visibility of the pointer is poor when the laser pointer is used because the display is self-luminous. In addition, when the display property of the display itself is improved, the reflectivity of the projected light of the laser pointer is suppressed if the scattering property of the display surface is improved, so that there arises a problem that the visibility of the laser pointer is not improved.

Recently, as disclosed in Japanese Patent Application Laid-Open No. 2001-236181, there is also a possibility that the laser pointer may be used as a pointing device for performing screen display manipulation on a display, and the visibility becomes even more important.

Japanese Patent Application Laid-Open No. 2001-236181

An object of the present invention is to provide a patterned retarder capable of improving visibility of a laser pointer and an image display device having the patterned retarder.

1. A patterned retarder comprising a photo-luminescent layer comprising a photo-luminescent material.

2. The patterned retarder according to 1 above, wherein the patterned retarder comprises a substrate, an orientation film and a cured liquid crystal layer, wherein the optical luminescent layer is the cured liquid crystal layer.

3. The patterned retarder according to item 1 above, wherein the patterned retarder has a substrate, an orientation film and a hardened liquid crystal layer, and the optical luminescence layer is a surface treatment layer formed on one side of the substrate.

4. The patterned retarder according to 3 above, wherein the surface treatment layer is at least one selected from the group consisting of an antireflection layer, an antistatic layer, a hard coat layer, a high refractive index layer, a low refractive index layer and an antifouling layer.

5. The patterned retarder as in 1 above, wherein said luminoluminescent material is a luminoluminescent pigment, a luminoluminescent dye or a mixture thereof.

6. The patterned retarder according to item 1 above, wherein the photoluminescent material is at least one selected from the group consisting of lanthanide complexes, organic phosphors, inorganic phosphors and photoluminescence quantum dot particles.

7. The patterned retarder according to 6 above, wherein the lanthanide complex is at least one selected from the group consisting of an europium complex, a turbomplex complex, a disproxime complex and a samarium complex.

8. The patterned retarder according to item 6 above, wherein the maximum excitation wavelength of the lanthanide complex, the organic phosphor and the inorganic phosphor is 450 nm or less.

9. The patterned retarder according to 6 above, wherein the maximum excitation wavelength of said lanthanide complex, organic phosphor and inorganic phosphor is 420 nm or less.

10. The patterned retarder according to 6 above, wherein the luminous luminescence quantum dot particle is a quantum dot particle, a quantum dot containing particle or a mixture thereof.

11. The method of claim 6, wherein the quantum dot particles are a II-VI group semiconductor compound; III-V semiconductor compound; Group IV-VI semiconductor compounds; Group IV elements or compounds containing them; And a semiconductor material selected from the group consisting of combinations thereof.

12. The patterned retarder of claim 10, wherein the quantum dot containing particles comprise inorganic core particles or at least one quantum dot particle bonded to the surface of the polymer core particle.

13. The patterned retarder according to 6 above, wherein the absorption wavelength of said luminous luminescence quantum dot particles is from 350 to 450 nm or from 600 to 650 nm.

14. An image display device comprising a patterning retarder according to any one of items 1 to 13 above.

Since the patterned retarder of the present invention emits light by stimulation by light including a photo-luminescence material, when the laser pointer is directly applied to the screen of the image display device and displayed on the screen of the image display device, Can be significantly improved.

In particular, visibility of the laser pointer can be remarkably improved even in the image display device implementing the stereoscopic image to which the patterning retarder of the present invention is applied.

The present invention provides a display having a light luminescent layer containing a light luminescent material, so that when a laser pointer is directly applied to a display and displayed on a screen of an image display device, And more particularly, to a patterning retarder and an image display apparatus having the patterning retarder.

Hereinafter, the present invention will be described in detail.

The patterned retarder of the present invention comprises a photo-luminescent layer containing a photo-luminescent material.

The patterning retarder is a structure applied to an image display device for realizing a 3D image, and is typically located between a display panel and a cover window of an image display device. Therefore, it is arranged at a position where the laser light of the laser pointer can reach.

The patterned retarder may have a structure in which a base film, an orientation film, and a hardened liquid crystal layer are sequentially laminated, and further includes a separate surface treatment layer to improve the functionality.

Therefore, the patterning retarder of the present invention can be provided with a separate optical luminescence layer in the conventional patterning retarder, or the above-described components for forming the patterning retarder can have a structure which doubles as the optical luminescence layer have.

More specifically, for example, the optical luminescence layer of the present invention may comprise a cured liquid crystal layer or a surface treatment layer having optical functionality including a photo luminescent material, Layer may be formed on at least one side of the base film, the alignment film and / or the hardened liquid crystal layer of the patterned retarder.

In an embodiment of the present invention, the patterned retarder may have a photo-luminescence cured liquid crystal layer formed by including a photo-luminescent material, which will be described in detail as follows.

The optical luminescence curable liquid crystal layer of the present invention contains a photo-luminescent material, so that, in addition to the function of changing the phase of light of a conventional cured liquid crystal layer, when a laser pointer is directly used on a screen of an image display device, The visibility of the pointer can be remarkably improved through the photoluminescence reaction in which the portion of the cured liquid crystal layer receiving the laser light emits light.

The above-mentioned photo-luminescence curable liquid crystal layer can be formed by applying a composition for forming a photo-luminescent liquid crystal layer containing a photo-luminescent material on an alignment film.

The composition for forming a photo-luminescent liquid crystal layer may include a liquid crystal compound, a photopolymerization initiator, and an organic solvent in addition to the photo-luminescent material.

The optical luminescent material according to the present invention is a material which is stimulated by light and emits light. Since the luminescent material can be aligned together without interfering with the orientation of the liquid crystalline compound, the optical function inherent to the liquid crystal layer Do not damage it.

The photoluminescent material according to the present invention is not particularly limited and may be, for example, a photoluminescent pigment, a photoluminescent dye or a mixture thereof. More specific examples include lanthanide complexes, organic phosphors, inorganic phosphors, and photoluminescence quantum dots. These may be used alone or in combination of two or more.

The lanthanide complex of the present invention is a compound containing a lanthanide series metallic element. The lanthanide series metallic element is not particularly limited, and examples thereof include europium, terbium, dysprosium and samarium, It can be europium.

Examples of the europium complex include tris (dibenzoylmethane) mono (1,10-phenanthroline) europium (III) (Eu (DBM) ₃ Phen); Tris (dynaphthylmethane) mono (1,10-phenanthroline) europium (III) (Eu (dnm) ₃ phen); BaMgAl ₁₀ O ₁₇ : Eu, Mn; Sr ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu.

The luminous luminescence quantum dot particles according to the present invention may be quantum dot particles, quantum dot containing particles or a mixture thereof.

The quantum dot is a nano-sized semiconductor material. The atoms form molecules, and the molecules form a cluster of small molecules called clusters to form nanoparticles. These nanoparticles are called quantum dots, especially when they have semiconductor properties.

The quantum dots emit energy according to the corresponding energy bandgap when they reach the excited state from the outside.

The quantum dot particles can be synthesized by a wet chemical process, an organometallic chemical vapor deposition process, or a molecular beam epitaxy process. A wet chemical process is a method of growing particles by adding a precursor material to an organic solvent. When the crystal grows, the organic solvent is naturally coordinated on the surface of the quantum dot crystal to act as a dispersing agent to control crystal growth. Therefore, the metal organic chemical vapor deposition (MOCVD) or molecular beam epitaxy (MBE) epitaxy), it is possible to control the growth of nanoparticles through an easier and less expensive process.

The quantum dot particle according to the present invention is not particularly limited as long as it is a quantum dot particle capable of emitting light by stimulation with light, for example, a II-VI group semiconductor compound; III-V semiconductor compound; Group IV-VI semiconductor compounds; Group IV elements or compounds containing them; And combinations thereof. ≪ Desc / Clms Page number 7 >

Wherein the II-VI group semiconductor compound is selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, and mixtures thereof; Trivalent compounds selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe and mixtures thereof; And a gallium nitride compound selected from the group consisting of CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, , GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof; A trivalent compound selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP and mixtures thereof; And a silicate compound selected from the group consisting of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, , The IV-VI group semiconductor compound is selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; Ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; And a silane compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. The Group IV element or a compound containing the Group IV element may be selected from the group consisting of Si, Ge, ≪ / RTI > And these elemental compounds selected from the group consisting of SiC, SiGe, and mixtures thereof.

The quantum dots may have a homogeneous single structure or a dual structure of a core-shell. In the latter case, the material forming each core and the shell may be a homogeneous single structure or a core- And may be made of other semiconductor compounds. However, the energy band gap of the shell material may be larger than the energy band gap of the core material. For example, when a quantum dot having a core-shell structure of CdSe / ZnS is to be obtained, (CH ₃ ) ₂ Cd (dimethyl cadmium), TOPSe (trioctylphosphine selenide) are added to an organic solvent using TOPO (trioctylphosphine oxide) The precursor material corresponding to the core (CdSe) is injected to generate crystals. After maintaining the crystal at a high temperature for a predetermined time to grow crystals to a predetermined size, a precursor material corresponding to the shell (ZnS) CdSe / ZnS quantum dots capped with TOPO can be obtained by forming a shell on the surface of the core.

The quantum dot containing particles according to the present invention include inorganic core particles or at least one quantum dot particle bonded to the surface of the polymer core particles.

The number of quantum dot particles introduced into the surface of the core particles of the quantum dot containing particles according to the present invention is not particularly limited and may be, for example, 1 to 8,200,000, preferably 10 to 640,000.

The inorganic core particles may be silica, alumina _{(Al 2 O 3, AlO 2} ), titanium dioxide or zinc dioxide. Alternatively, the polymer core particles may be polystyrene or polymethylmethacrylate. The diameter of the core particles is not particularly limited, and may be, for example, 2 to 1,000 mu m.

The core particles and the quantum dot particles may be bonded by covalent bonding, ionic bonding or physical adsorption. At this time, the covalent bond may be formed by a functional group that includes at least one atom of sulfur, nitrogen, or phosphor that binds to the quantum dot particle on one side and binds to the core particle on the other side. The functional group may be a silane group, an amino group, a sulfonic group, a carboxyl group or a hydroxy group.

The maximum excitation wavelength or absorption wavelength for emitting light by the luminous luminescent material according to the present invention may vary depending on the material to be used and therefore can not be collectively limited.

For example, the maximum excitation wavelength of the lanthanide complex, the organic phosphor and the inorganic phosphor is not particularly limited and may be, for example, not in the visible light range, more specifically 450 nm or less, and preferably 420 nm or less. This is related to the laser light of the used laser pointer and the light source of the display. If the wavelength of the light is more than 450 nm, the light source is a light source in the visible light region. Since the excitation wavelength is not limited to the visible light region, the lower limit of the excitation wavelength is not particularly limited. For example, the excitation wavelength may be 350 nm. However, the excitation wavelength may vary depending on the material used.

It is also preferable that the absorption wavelength of the luminous luminescence quantum dot particle is not the wavelength of the visible light region, for example, 350 to 450 nm in order to suppress the light luminescence layer from emitting light by the light source of the display.

In another aspect of the present invention, even if the absorption wavelength of the luminous luminescence quantum dot particle is a wavelength in the visible light region, it is acceptable if the light emission by the light source of the display does not hinder the visibility of the laser pointer. To 650 nm.

The content of the photo-luminescent material of the present invention is not particularly limited and may be, for example, 0.01 to 90% by weight, preferably 0.03 to 30% by weight, based on the total weight of the composition for forming a photo- %. When the content of the photoluminescent material is within the range of 0.03 to 30% by weight, a sufficient optical luminescence effect can be obtained, and other components can be contained in an appropriate amount to maintain the desired hardness. If the luminous luminescence quantum dot particles are used as the luminescent material, it is more preferably 0.2 to 30% by weight based on the total weight of the composition for forming a light-luminescent liquid crystal layer, Is preferably 0.4 to 20% by weight. Within the above range, the optical luminescence function can be effectively exhibited without deteriorating the desired optical functionality.

The composition for forming a photo-luminescence-cured liquid crystal layer may contain a liquid crystal compound, a polymerization initiator, an organic solvent, and the like, which are used in the art, in addition to the photo-luminescent material.

The liquid crystalline compound of the present invention is not particularly limited as long as it is a liquid crystalline compound capable of undergoing a polymerization reaction which is commonly used in the art, for example, [Cordula Mock-Knoblauch, Olivier S. Enger, Ulrich D. Schalkowsky, L-7 Novel Polymerisable Liquid Crys talline Acrylates for Ultrathin Optical Films ", SID Symposium Digest of Technical Papers, 2006, Vol. 37, p. 1673] or JP-A-2010-24438. Commercially available liquid crystal compounds include, but are not limited to, LC242 (manufactured by BASF).

More specific examples of such a liquid crystalline compound include compounds represented by the following formulas (1) and (2).

[Chemical Formula 1]

(2)

The polymerization initiator of the present invention can use a photopolymerization initiator or a thermal polymerization initiator without any particular limitation, and a photopolymerization initiator can be preferably used.

More specific examples of the photopolymerization initiator include triazine-based compounds, acetophenone-based compounds, nonimidazole-based compounds, oxime-based compounds, benzoin-based compounds, benzophenone-based compounds, thioxanthone-based compounds and anthracene- , But is not limited thereto.

The content of the polymerization initiator is not particularly limited, but it is preferably 0.1 to 40 parts by weight, and preferably 1 to 30 parts by weight based on 100 parts by weight of the liquid crystalline compound as a solid component.

The organic solvent of the present invention is not particularly limited as long as it is a commonly used solvent in the art, and specific examples thereof include ethylene glycol monoalkyl ethers, diethylene glycol dialkyl ethers, ethylene glycol alkyl ether acetates, alkylene glycol Alkyl ether acetates, propylene glycol monoalkyl ethers, propylene glycol dialkyl ethers, propylene glycol alkyl ether propionates, butyldiol monoalkyl ethers, butanediol monoalkyl ether acetates, butanediol monoalkyl ether propionates , Dipropylene glycol dialkyl ethers, ketones, alcohols, esters, and cyclic esters. These may be used alone or in admixture of two or more.

The content of the organic solvent is not particularly limited as long as it maintains an appropriate viscosity.

The composition for forming a photo-luminescent liquid crystal layer of the present invention may contain additives such as a polymerization inhibitor, a photosensitizer, a filler, a hardener, a leveling agent, an adhesion promoter, an antioxidant, an ultraviolet absorber, As shown in FIG.

The above-described components can be used to form a photo-luminescence curable liquid crystal layer capable of a photo-luminescence reaction.

The patterned retarder of the present invention can be produced by forming an alignment film on one side of a base film and then applying the composition for forming a cured liquid crystal layer on the other side of the alignment film to which the base film is bonded to form a cured liquid crystal layer.

The base film and the alignment film can be used without any particular limitation, as commonly used in the art.

There are no particular limitations on the type of the substrate film that can be used, but transparent films are generally used in the art. Specific examples thereof include triacetyl cellulose (TAC), cyclo-olefin polymer (COP), poly (methyl methacrylate )) Based polymer, and the like. The substrate film may be subjected to a surface treatment such as a saponification treatment, a remote plasma treatment, a direct plasma treatment, a monomer plasma treatment, or the like. When a PMMA base material film is used, it is preferable to use polymeric beads such as urethane beads dispersed in the base film.

The alignment film has a function of aligning the liquid crystal compound of the hardened liquid crystal layer in a predetermined direction and may be formed of a composition for forming an alignment film containing an aligning agent, a polymerization initiator and an organic solvent ordinarily used in the art. As the alignment agent, an alignment agent commonly used in the art can be used without any particular limitation. For example, a polymer including a cinnamate group and having a weight average molecular weight of about 10,000 to 500,000 may be used, but is not limited thereto. As the polymerization initiator, a photopolymerization initiator or a thermal polymerization initiator commonly used in the art can be used. As the photopolymerization initiator, the photopolymerization initiator exemplified above may be used. The organic solvent may also be appropriately selected from among the organic solvents exemplified above.

The composition for forming an alignment film can be applied to one surface of a base film to form an alignment film on the base film. The composition for forming the optical luminescence-curable liquid crystal layer is applied to the other surface of the alignment film on which the base film is laminated to form a cured liquid crystal layer .

The method for applying the above composition for forming a photo-luminescence hardened liquid crystal layer on the alignment film is not particularly limited and may be a method commonly used in the art. For example, a fountain coating method, a die coating method, A spray coating method, a gravure coating method, a roll coating method, and a bar coating method.

A composition for forming a photo-luminescent liquid crystal layer can be applied and cured to form a photo-luminescent layer, which can be subjected to a drying step as needed before curing.

The drying method is not particularly limited, and examples thereof include natural drying, hot air drying, heat drying and the like.

The curing method is not particularly limited, and examples thereof include ultraviolet curing and ionizing radiation curing. Various active energies can be used as the means, and ultraviolet rays are more preferably used. Examples of the energy source include a high pressure mercury lamp, a halogen lamp, a xenon lamp, a metal halide lamp, a nitrogen laser, an electron beam accelerator, and a radioactive element. The irradiation dose of the energy source is preferably 50 to 5000 mJ / cm < 2 > as the total exposure dose in the ultraviolet ray A region. If the irradiation amount is 50 mJ / cm 2 or more, the curing becomes more sufficient and the hardness of the formed photoluminess layer becomes more sufficient. Further, if it is 5000 mJ / cm < 2 > or less, coloring of the formed luminous layer can be prevented, and transparency can be improved.

According to the above manufacturing method, a patterned retarder in which a base film, an orientation film, and a photo-luminescence cured liquid crystal layer are sequentially laminated can be manufactured. When the patterned retarder is applied to a display, The visibility of the laser pointer can be remarkably improved by emitting light by stimulation by light.

According to another embodiment of the present invention, the patterned retarder of the present invention may be provided with a separate optical luminescent optical function layer formed by including a photo-luminescent material, which will be described in detail as follows .

The optical functional layer is a surface treatment layer formed on the surface of the base film or the hardened liquid crystal layer to improve the functionality of the patterned retarder. Specific examples thereof include an antireflection layer, an antistatic layer, a hard coat layer, a high refractive index layer, A layer and an antifouling layer, but the present invention is not limited thereto.

The optical luminescence optical function layer of the present invention includes a light luminescent material, and thus, in addition to the functions of antireflection, antistatic, and hard coating, which are typical functions of the optical function layer, The visibility of the pointer can be remarkably improved through the photo-luminescence reaction in which the portion of the cured liquid crystal layer receiving the laser light is emitted by the light of the laser pointer.

The optical luminescence optical function layer may be formed by applying a composition for forming a photo-luminescence optical function layer containing the above-mentioned optical luminescence material on at least one surface of a base film and / or a hardened liquid crystal layer. The composition for forming a photo-luminescent optical functional layer can be prepared by further adding a photo-luminescent material to a composition for forming an optical functional layer.

When the lanthanide complex, the organic phosphor, and the inorganic phosphor are used as the light luminescent material, the content of the luminescent material is not particularly limited, May be 0.01 to 90% by weight, preferably 0.03 to 30% by weight, based on the total weight of the composition for forming an optical functional layer. Within the above range, the optical luminescence function can be effectively exhibited without deteriorating the desired optical functionality.

When the optical luminescent particles are used as the luminescent material, the content thereof is not particularly limited, but may be 0.2 to 30% by weight based on the total weight of the composition for forming a photo-luminescence optical functional layer, Is preferably 0.4 to 20% by weight. Within the above range, the optical luminescence function can be effectively exhibited without deteriorating the desired optical functionality.

The optical functional additive is added to realize desired physical properties of the antireflection layer, the antistatic layer, the hard coat layer, the high refractive index layer, the low refractive index layer and the antifouling layer, and the kind of the optically functional additive is usually And is not particularly limited as long as it is used.

The patterned retarder of the present invention can be produced by coating the composition for forming the optical luminescence optical function layer on at least one surface of the base film and / or the cured liquid crystal layer.

According to another embodiment of the present invention, the patterned retarder of the present invention may be provided with a single layer which performs only the role of a photoluminescence, , The alignment layer and the hardened liquid crystal layer, or may be formed on at least one surface of the optical function layer when the optical function layer is provided. This will be described in detail as follows.

The photoluminescence single layer may be formed by applying a composition for forming a single layer of a photo-luminescence in addition to a photoluminescent material, including a light-transmitting resin, a photopolymerization initiator, and a solvent.

When the lanthanide complex, the organic phosphor, and the inorganic phosphor are used as the light luminescent material, the content of the luminescent material is not particularly limited, May be 0.01 to 90% by weight, preferably 0.03 to 30% by weight, based on the total weight of the composition for forming a single layer. Within the above range, the optical luminescence function can be effectively exhibited without deteriorating the desired optical functionality.

In the case where the photoluminescent particles are used as the photoluminescent material, the content thereof is not particularly limited, but may be 0.2 to 30% by weight based on the total weight of the composition for forming the photoluminescence single layer, 0.4 to 20% by weight. Within the above range, the optical luminescence function can be effectively exhibited without deteriorating the desired optical functionality.

The light transmitting resin may be a photocurable resin, and the photocurable resin may include a photocurable (meth) acrylate oligomer and a monomer.

Examples of the photocurable (meth) acrylate oligomer include epoxy (meth) acrylate and urethane (meth) acrylate, and urethane (meth) acrylate is more preferable.

The urethane (meth) acrylate can be prepared by reacting a polyfunctional (meth) acrylate containing a hydroxy group with a compound having an isocyanate group in the presence of a catalyst.

The (meth) acrylate containing the hydroxy group is not particularly limited and includes, for example, 2-hydroxyethyl (meth) acrylate, 2-hydroxyisopropyl (meth) acrylate, 4-hydroxybutyl Acrylate, caprolactone ring-opening hydroxyacrylate, pentaerythritol tri / tetra (meth) acrylate mixture, and dipentaerythritol penta / hexa (meth) acrylate mixture. These may be used alone or in combination of two or more.

The isocyanate group-containing compound is not particularly limited, and examples thereof include 1,4-diisocyanatobutane, 1,6-diisocyanatohexane, 1,8-diisocyanatooctane, 1,12-diisocyanatododecane , 1,5-diisocyanato-2-methylpentane, trimethyl-1,6-diisocyanatohexane, 1,3-bis (isocyanatomethyl) cyclohexane, trans- 4,4'-methylenebis (cyclohexyl isocyanate), isophorone diisocyanate, toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, xylene-1,4-diisocyanate, Diisocyanate, 1-chloromethyl-2,4-diisocyanate, 4,4'-methylenebis (2,6-dimethylphenylisocyanate), 4,4'-oxybis (phenylisocyanate) Trifunctional isocyanate derived from methylene diisocyanate, trimethane propanol adduct toluene And endoisocyanate. These may be used alone or in combination of two or more.

The monomer is not particularly limited and includes, for example, a monomer having an unsaturated group such as a (meth) acryloyl group, a vinyl group, a styryl group and an allyl group as a photocurable functional group, and a (meth) acryloyl group Monomers are more preferred.

The monomer having a (meth) acryloyl group is not particularly limited, and examples thereof include neopentyl glycol acrylate, 1,6-hexanediol (meth) acrylate, propylene glycol di (meth) acrylate, triethylene glycol di (Meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolethane (meth) acrylate, dipropylene glycol di (meth) acrylate, polyethylene glycol di Acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol (meth) acrylate, Tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol (Meth) acrylate, tripentaerythritol tetra (meth) acrylate, tripentaerythritol hexa tri (meth) acrylate, bis (2-hydroxyethyl) isocyanurate di (Meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, isooctyl (meth) acrylate, iso-decyl (Meth) acrylate, phenoxyethyl (meth) acrylate, isobonole (meth) acrylate, and the like. These may be used alone or in combination of two or more.

The above-mentioned photocurable (meth) acrylate oligomer and monomers may be used alone or in combination of two or more.

The content of the light-transmitting resin is not particularly limited and may be, for example, 1 to 80% by weight, preferably 3 to 65% by weight, based on the total weight of the composition for forming a single layer of the optical luminescence. If the content of the light-transmitting resin is less than 1% by weight, it may be difficult to provide sufficient hardness, and if it exceeds 80% by weight, curling may become worse.

The photopolymerization initiator may be, for example, 2-methyl-1- [4- (methylthio) phenyl] 2-morpholinepropanone-1, diphenylketone Benzyl dimethyl ketal, 2-hydroxy-2-methyl-1-phenyl-1-one, 4-hydroxycyclophenyl ketone, dimethoxy- Sol, 3-methylacetophenone, 4-quinolone acetophenone, 4,4-dimethoxyacetophenone, 4,4-diaminobenzophenone, 1-hydroxycyclohexyl phenyl ketone, and benzophenone. These may be used alone or in combination of two or more.

The content of the photoinitiator is not particularly limited and may be, for example, 0.1 to 10% by weight, preferably 0.3 to 8% by weight, based on the total weight of the composition for forming a single layer of a photoluminance. If the content of the photoinitiator is less than 0.1% by weight, the curing rate may be lowered and the process efficiency may be deteriorated. If the content is more than 10% by weight, cracks may occur due to overcuring.

The solvent is not particularly limited and may be a solvent commonly used in the art. Examples thereof include alcohol solvents such as methanol, ethanol, isopropanol, butanol, methylcellosolve and ethylsulosolve; Ethyl acetate, propyl acetate, n-butyl acetate, tertiary butyl acetate, methyl cellosolve acetate, ethyl cellosolve acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxy Acetate solvents such as butyl acetate and methoxypentyl acetate; Ether solvents such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether and propylene glycol monomethyl ether; Ketone solvents such as methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, diethyl ketone, dipropyl ketone, and cyclohexanone; Hexane solvents such as hexane, heptane and octane; And aromatic hydrocarbon solvents such as benzene, toluene and xylene. These may be used alone or in combination of two or more.

The content of the solvent is not particularly limited and may be, for example, 5 to 95% by weight, preferably 15 to 90% by weight, based on the total weight of the composition for forming a single layer of a photoluminescence layer. If the content of the solvent is less than 10% by weight, the viscosity of the composition may increase and the workability may be deteriorated. If the content of the solvent is more than 95% by weight, the curing process may take a long time.

A photoluminescence single layer capable of a photoluminescence reaction can be formed, including the above components.

The present invention also provides an image display apparatus including the patterned retarder.

The type of the image display device is not particularly limited and may be, for example, a liquid crystal display device, an OLED, a plasma display device, an electroluminescence display device, a cathode ray tube display device, or the like.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the invention and are not intended to limit the scope of the claims. It will be apparent to those skilled in the art that such variations and modifications are within the scope of the appended claims.

One. Hardening Liquid crystal layer  : Example  1-7 and Comparative Example  One

Example  One  - Optical luminescence  Hardening Liquid crystal layer ( Lanthanide series -One)

23.9 parts by weight of a mixture of a liquid crystal compound represented by the following formula (1) / (2) = 60/40 (weight ratio), 5 parts by weight of Irgacure-907 as a photopolymerization initiator, 70 parts by weight of toluene / isopropyl alcohol 0.8 part by weight of lanthanide luminous luminescent substance tris (dibenzoylmethane) mono (1,10-phenanthroline) europium (III) 0.3 parts by weight of BYK-361N as a leveling agent were mixed to prepare a composition for forming a cured liquid crystal layer .

The prepared composition for forming a cured liquid crystal layer was applied on an alignment film having an A pattern and a B pattern, dried at a temperature of 60 DEG C for 1 minute, and exposed to a curing reaction to prepare a patterned retarder.

Example  2  - Optical luminescence  Hardening Liquid crystal layer ( Lanthanide series -2)

Except that tris (dinaphthylmethane) mono (1,10-phenanthroline) europium (III) was used as the luminoluminescent material in Example 1, and the composition for forming the cured liquid crystal layer and the patterned Retarder.

Example  3  - Optical luminescence  Hardening Liquid crystal layer ( Lanthanide series -3)

A composition for forming a cured liquid crystal layer and a patterned retarder were prepared in the same manner as in Example 1, except that BaMgAl ₁₀ O ₁₇ : Eu, Mn was used as a luminous luminescent material.

Example  4  - Optical luminescence  Hardening Liquid crystal layer ( Lanthanide series -4)

A composition for forming a cured liquid crystal layer and a patterned retarder were prepared in the same manner as in Example 1, except that Sr ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu was used as a luminous luminescent material.

Example  5  - Optical luminescence  Hardening Liquid crystal layer ( Qdot  Particle-1)

A composition for forming a cured liquid crystal layer and a patterned retarder were prepared in the same manner as in Example 1, except that 0.8 parts by weight of quantum dot particles (CdS) as quantum dot particles were used as a photo-luminescent material.

Example  6  - Optical luminescence  Hardening Liquid crystal layer  ( Qdot  Particle-2)

A composition for forming a cured liquid crystal layer and a patterned retarder were prepared in the same manner as in Example 5, except that quantum dot particles (CdS420) were used as a luminous luminescent material.

Example  7  - Optical luminescence  Hardening Liquid crystal layer  ( Qdot  Particle-3)

A composition for forming a cured liquid crystal layer and a patterned retarder were prepared in the same manner as in Example 5, except that quantum dot particles (CdSe640) was used as a luminous luminescent material.

Comparative Example  One

Patterning retarder was prepared in the same manner as in Example 1, except that the optical luminescent particles were not used in the cured liquid crystal layer.

2. Surface treatment layer ( Antireflection layer ): Example  8-9 and Comparative Example  2

Example  8  - Optical luminescence  Antireflection layer Lanthanide series )

On one surface of the patterned retarder of Comparative Example 1, 0.8 parts by weight of tris (dibenzoylmethane) mono (1,10-phenanthroline) Europium (III) as a photoluminescent material, 0.8 parts by weight of Irgacure- 5 parts by weight of silica particles, 19 parts by weight of urethane acrylate / hexanediol diacrylate = 85/15 (weight ratio), 70 parts by weight of toluene / isopropyl alcohol = 95/5 as an organic solvent, And 0.2 parts by weight of BYK-2008 were coated and cured to prepare an antireflection layer.

Example  9  - Optical luminescence Antireflection layer ( Qdot  particle)

A composition for forming an antireflective layer and a patterned retarder were prepared in the same manner as in Example 8 except that 0.8 parts by weight of quantum dot particles (CdS) as quantum dot particles were used as a luminous luminescent material.

Comparative Example  2

Patterning retarder was prepared in the same manner as in Example 8, except that the optical luminescent particles were not used for the antireflection layer.

Test Example

For each of the patterned retarders obtained in Examples and Comparative Examples, the following evaluation tests were carried out, and the results are shown in Table 1 below.

(One) laser  Pointer visibility evaluation

When the patterned retarder manufactured in Examples and Comparative Examples was attached to the upper surface of the display panel and the display was changed to the white mode and the 405 nm laser pointer was irradiated to the panel at an angle of 60 degrees, .

&Amp; cir &: The light of the laser pointer is brightly recognized.

A: The position of the laser pointer can be recognized.

X: The position of the laser pointer is not confirmed.

(2)? SCE (%) Measure

The scattered reflectance of the optical stacked body was measured in an SCE mode using an integral spectrophotometer (cm-3700d, Konica Minolta) after the back surface of the optical stacked body manufactured in Examples and Comparative Examples was attached to a black plate.

Since the emitted light is emitted in all directions, the light is measured even in the SCE mode and appears as a scattering reflectance.

At this time, in order to eliminate the possibility that the scattering reflectance may be increased due to the scattering reflection value of the antiglare film itself, the scattering reflectance of the light emitting wavelength and the scattering reflectance (scattering reflectance of the film itself) The luminescence was confirmed by the difference.

If the ΔSCE (%) was more than 0.2%, the laser pointer could be visually recognized easily on the panel.

(3) Orientation angle

The orientation angles of A among the A and B patterns of the retardation film produced with the WPA-100L equipment of Lucea were measured

◎; 45 ° ± 3 (for A pattern), 135 ° ± 3 (for B pattern)

○: Less than 45 ° ± 6 (for A pattern), less than 135 ° ± 6 (for B pattern)

X: 45 ° ± 6 or more (for A pattern), 135 ° ± 6 or more (for B pattern)

(4) Phase difference

Rr; The patterned retarder phase difference produced in Comparative Example 1

R5; The retardation of the patterned retarder

◎; 0.97 < Rs / Rr < 1.03

?: 0.95 <Rs / Rr <0.97 or 1.03 <Rs / Rr <1.05

?: 0.90 <Rs / Rr <0.95 or 1.05 <Rs / Rr <1.1

X: Rs / Rr 1.1 or more or Rs / Rr 0.90 or less

(5) Reflectance

The reflectance of the manufactured optical stacked body in a visible light range of 380 to 780 nm was measured with a UV-spectrophotometer (SHIMADZU) to obtain the lowest reflectance.

division Laser Pointer Visibility
(405 nm) ΔSCE (%) Orientation angle Phase difference reflectivity
(%) A pattern B pattern A pattern B pattern Example 1 ◎ 1.3 45 135 125 125 3.8 Example 2 ○ 0.9 44 135 125 125 3.8 Example 3 ○ 0.8 44 135 125 125 3.8 Example 4 ○ 0.9 44 135 125 125 3.8 Example 5 ◎ 1.4 44 134 124 123 3.8 Example 6 ○ 1.0 43 134 123 124 3.8 Example 7 ○ 0.9 44 134 124 123 3.8 Example 8 ◎ 1.4 45 135 125 125 0.9 Example 9 ◎ 1.3 45 135 125 125 0.9 Comparative Example 1 X 0.3 45 135 125 125 3.8 Comparative Example 2 X 0.3 45 135 125 125 0.9

Referring to Table 1, it can be confirmed that the patterned retarder of the present invention having the optical luminescence layer is excellent in the visibility of the laser pointer.

Comparing the examples and the comparative examples, it can be confirmed that the basic physical properties of the patterned retarder are not deteriorated even when the optical luminescence layer is provided.

Claims (14)

A patterned retarder comprising a photo-luminescent layer comprising a photo-luminescent material.
The patterned retarder of claim 1, wherein the patterned retarder comprises a substrate, an orientation film, and a cured liquid crystal layer, wherein the optical luminescent layer is the cured liquid crystal layer.
The patterned retarder according to claim 1, wherein the patterned retarder comprises a substrate, an orientation film, and a cured liquid crystal layer, wherein the optical luminescence layer is a surface treatment layer formed on one side of the substrate.
4. The patterned retarder according to claim 3, wherein the surface treatment layer is at least one selected from the group consisting of an antireflection layer, an antistatic layer, a hard coat layer, a high refractive index layer, a low refractive index layer and an antifouling layer.
3. The patterned retarder of claim 1, wherein the light luminescent material is a photoluminescent pigment, a photoluminescent dye, or a mixture thereof.
The patterned retarder according to claim 1, wherein the photoluminescent material is at least one selected from the group consisting of lanthanide complexes, organic phosphors, inorganic phosphors and photoluminescence quantum dot particles.
7. The patterned retarder according to claim 6, wherein the lanthanide complex is at least one selected from the group consisting of an europium complex, a turbomplex complex, a disproxime complex and a samarium complex.
7. The patterned retarder of claim 6, wherein the maximum excitation wavelength of the lanthanide complex, the organic phosphor and the inorganic phosphor is 450 nm or less.
7. The patterned retarder of claim 6, wherein the maximum excitation wavelength of the lanthanide complex, the organic phosphor and the inorganic phosphor is 420 nm or less.
7. The patterned retarder of claim 6, wherein the luminous luminescence quantum dot particle is a quantum dot particle, a quantum dot containing particle, or a mixture thereof.
[7] The method of claim 6, wherein the quantum dot particle is a II-VI group semiconductor compound; III-V semiconductor compound; Group IV-VI semiconductor compounds; Group IV elements or compounds containing them; And a semiconductor material selected from the group consisting of combinations thereof.
11. The patterned retarder of claim 10, wherein the quantum dot containing particles comprise inorganic core particles or at least one quantum dot particle bonded to the surface of the polymer core particle.
7. The patterned retarder of claim 6, wherein the absorption wavelength of the luminous luminescence quantum dot particle is from 350 to 450 nm or from 600 to 650 nm.
An image display apparatus comprising the patterned retarder according to any one of claims 1 to 13.