KR20160112576A - Liquid Crystal Display Device - Google Patents

Liquid Crystal Display Device Download PDF

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Publication number
KR20160112576A
KR20160112576A KR1020150038552A KR20150038552A KR20160112576A KR 20160112576 A KR20160112576 A KR 20160112576A KR 1020150038552 A KR1020150038552 A KR 1020150038552A KR 20150038552 A KR20150038552 A KR 20150038552A KR 20160112576 A KR20160112576 A KR 20160112576A
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South Korea
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film
polarizer
liquid crystal
thickness
20psa
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KR1020150038552A
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Korean (ko)
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이동찬
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동우 화인켐 주식회사
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Publication of KR20160112576A publication Critical patent/KR20160112576A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

The present invention relates to a liquid crystal device which reduces a panel bending phenomenon causing an existing light leakage phenomenon by controlling the thickness of each film forming an upper and lower polarizing plate along with a moisture expansion rate characteristic of the upper polarizing plate. Therefore, the present invention can implement a high-definition screen.

Description

[0001] The present invention relates to a liquid crystal display device,

The present invention relates to a liquid crystal display device with reduced panel warping.

2. Description of the Related Art A liquid crystal display device (LCD) is one of image display devices, and has advantages of realizing light weight shortening and low power consumption compared to a cathode ray tube (CRT), which is a typical image display device .

Unlike a CRT, the liquid crystal display device is not a device that emits light by itself, and thus requires a light source in addition to a liquid crystal panel. As a light source of such a liquid crystal display device, a fluorescent lamp is mainly used. First and second polarizing plates (upper plates) are attached to both surfaces of a liquid crystal panel of a liquid crystal display device. The first and second polarizing plates block or allow light coming from the lamp.

1, the liquid crystal display device 1 includes a backlight unit 10 provided with a light source 11, a reflection plate 12, a light guide plate 13 and a diffusion plate 14, A liquid crystal panel 30 on the top, and an upper polarizer 20 and a lower polarizer 40 on upper and lower portions thereof.

The upper and lower polarizers 20 and 40 have a structure in which a pressure sensitive adhesive layer for bonding with the liquid crystal panel is formed on one side of a laminate where a polarizer is positioned between a pair of transparent protective films. At this time, as the polarizer, a polyvinyl alcohol (PVA) film stretched in a predetermined direction and dyed with a dichromatic dye is used.

At this time, the upper polarizer 20 includes a PVA film stretched in the short side direction (90 DEG) as a polarizer, and the lower polarizer 40 includes a PVA film stretched in the long side direction (0 DEG). However, the stretched PVA film shrinks in the stretching axis direction according to the change of the temperature or the humidity, thereby causing a panel warp phenomenon in which the liquid crystal panel also warps.

As a result, the liquid crystal panel 30 is bent convexly toward the upper polarizer 20 due to the difference in shrinkage stress of the polarizers 20 and 40 attached to both sides of the liquid crystal panel 30, .

This panel warping phenomenon is caused by the difference in the shrinkage ratio of the polarizing plate (particularly, in the stretching direction) depending on the position under the heat or humid condition. As a result, light leaks (that is, light leakage phenomenon), static electricity, and the like occur, resulting in unevenness, resulting in a defective liquid crystal panel.

Various methods for improving the light leakage phenomenon have been proposed.

For example, a method of minimizing the shrinkage stress applied to the liquid crystal panel by minimizing the shrinkage stress occurring in the polarizing plate; A method of increasing the molecular density of a pressure-sensitive adhesive resin to reduce heat-induced deformation; And a method of securing thermal stability by increasing the degree of crosslinking between chains by adding a functional group between the chains of the base film resin. However, this method has not found the precise cause for improvement of the light leakage phenomenon, and it is only presented as a fractional solution, so that it is not easy to respond when the structure is changed.

For example, Korean Patent Laid-Open Publication No. 2004-0016382 discloses a method of attaching a protective film having different coefficients of absorption and expansion with respect to the absorption axis direction of a polarizing plate to reduce the occurrence of warping of the polarizing plate.

Korean Patent Laid-Open Publication No. 2008-0071743 suggests that the pushing distance of the pressure-sensitive adhesive of the upper and lower polarizing plates is limited to improve the light leakage phenomenon caused by the warping of the liquid crystal panel

Korean Patent Laid-Open Publication No. 2011-0037001 discloses that the light leakage in the side can be improved by arranging the? / 4 phase difference plates having the limited refractive index in the thickness direction on the upper and lower polarizer plates respectively.

However, in spite of these various efforts, the panel bending phenomenon in the liquid crystal display device has not been satisfactorily solved.

Korean Patent Publication No. 2004-0016382 Korean Patent Publication No. 2008-0071743 Korean Patent Publication No. 2011-0037001

In order to reduce the panel warpage phenomenon, the applicant of the present invention approaches the constituent elements of the liquid crystal display device at a new angle to adjust the water expansion rate of the outer film of the polarizing plate by considering the shrinkage of the polarizer caused by water evaporation, It was confirmed that when the thicknesses of the components of the polarizing plate are limited, the warping of the panel can be effectively reduced only by the thickness parameters regardless of the material.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a liquid crystal display device in which a panel warping phenomenon is reduced and a light leakage phenomenon is improved.

In order to achieve the above object, the present invention provides an upper polarizer, a lower polarizer, and a liquid crystal display in which a liquid crystal panel is disposed therebetween.

The upper polarizer has a laminated structure of a first outer film, a first polarizer and a first inner film sequentially from the top.

Further, the lower polarizer plate has a structure in which the second inner film, the second polarizer, and the second outer film are sequentially laminated.

Here, the first outer film of the upper polarizer has a room temperature recovery rate of 0.07 to 0.15% expressed by the following formula (1).

[Equation 1]

Figure pat00001

(In the above formula (1)

L 0 is the length in the MD direction after leaving the film of 100 * 100 mm size at 80 ° C (dry) for 24 hours,

L 1 means the length in the MD direction after leaving the film of 100 * 100 mm size again at 23 ° C / 50% RH for 24 hours)

Further, the present invention is characterized in that the thickness of the first and second outer and inner films satisfies the following formula (2): " (2) "

&Quot; (2) "

Figure pat00002

(In the above equation (2)

T 1 is the thickness of the first outer film,

T 2 is the thickness of the first inner film,

T 3 is the thickness of the second inner film,

T 4 is the thickness of the second outer film)

The present invention can realize a high quality screen by controlling the coefficient of water expansion of the upper polarizer of the liquid crystal display device and controlling the thickness of each film constituting the upper and lower polarizer plates to reduce the panel warping phenomenon that causes the conventional light leakage phenomenon.

1 is a schematic configuration diagram of a liquid crystal display device.
2 is a perspective view illustrating a liquid crystal panel and a polarizing plate according to a first embodiment of the present invention.
3 is a cross-sectional view illustrating a liquid crystal panel and a polarizing plate according to a first embodiment of the present invention.
4 is a view showing the bending state of the liquid crystal panel and the polarizing plates according to the first embodiment of the present invention.
5 is a perspective view showing a liquid crystal panel and a polarizing plate according to a second embodiment of the present invention.
6 is a cross-sectional view illustrating a liquid crystal panel and a polarizing plate according to a second embodiment of the present invention.
7 is a view showing a bending state of the liquid crystal panel and the polarizing plates according to the second embodiment of the present invention.
8 is a cross-sectional view illustrating a liquid crystal panel and a polarizing plate according to a third embodiment of the present invention.

The present invention limits the thickness ratio of each film constituting the upper polarizer and the lower polarizer in order to prevent panel warping in the liquid crystal display, and controls the physical properties of the outer film of the upper polarizer at this time.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the drawings.

[First embodiment]

FIG. 2 is a perspective view showing a liquid crystal panel and a polarizing plate according to a first embodiment of the present invention, FIG. 3 is a sectional view showing a liquid crystal panel and a polarizing plate according to a first embodiment of the present invention, FIG. 3 is a view showing a bending state of a liquid crystal panel and polarizing plates according to an embodiment.

Referring to FIG. 2, a liquid crystal display device generally has an upper polarizer 20a and a lower polarizer 40a disposed with a liquid crystal panel 30a as a center.

Specifically, the absorption axis of the upper polarizer 20a is 80 to 100 °, and the absorption axis of the lower polarizer 40a is -10 to 10 °. The absorption axis of the upper polarizer 20b in Fig. 2 is 0 占 and the absorption axis of the lower polarizer 40b is 90 占.

At this time, the upper polarizer 20a is laminated in this order from the top to the first outer film 21a, the first polarizer 22a, and the first inner film 23a, and the lower polarizer 40a is laminated from the bottom to the second inner film 41a, the second polarizer 42a, and the second outer film 43a are stacked in this order.

When the moisture permeability of the upper and lower polarizers 20a and 40a is unbalanced in the laminated structure, the panel bending phenomenon occurs.

4 (A), when the absorption axis of the upper polarizer 20a is 0 ° and the absorption axis of the lower polarizer 40a is 90 °, the upper polarizer 20a shrinks to the left and right, , And the lower polarizer 20a is vertically contracted

As shown in FIGS. 4 (B) and 4 (C), the upper polarizer 20a is deflected at a height H1 and the lower polarizer 40a is deflected at a height H2.

This warp occurs more seriously at the upper polarizer 20a and consequently causes light leakage. Therefore, in the present invention, the recovery rate at room temperature of the outer film of the upper polarizer 20a, that is, the first outer film 21a, which is most influenced by the external environment, is limited, and the outer polarizing plate 20a, The thickness ratio of the inner films 23a and 41a, and the thickness ratio of the inner films 23a and 41a.

Here, the "room temperature recovery rate " referred to in the specification of the present invention is a numerical value showing the change in length in the stretching direction after the film is completely dried and left under normal temperature and moist heat conditions,

[Equation 1]

Figure pat00003

(In the above formula (1)

L 0 is the length in the MD direction after leaving the film of 100 * 100 mm size at 80 ° C (dry) for 24 hours,

L 1 means the length in the MD direction after leaving the film of 100 * 100 mm size again at 23 ° C / 50% RH for 24 hours)

The MD (Machinery Direction) direction means a stretching direction and means a longitudinal direction or a longitudinal direction.

The meaning of 80 DEG C (dry) means that dry heat treatment is performed at 80 DEG C in an apparatus such as an oven for moisture removal in the film.

At this time, the large value of the room temperature recovery rate means that the change is large, which means that the shrinkage degree is large. In the present invention, the value of the room temperature recovery rate is adjusted to 0.15% or less, preferably 0.07 to 0.15%. The smaller the value, the better the smaller the value is, and the lower limit is the limit value of the present technology. If the numerical value exceeds the above range, the upper polarizing plate adopting the upper polarizing plate has a greater shrinkage than the lower polarizing plate, thereby increasing the warping of the panel, and as a result, there is a high probability of causing light leakage of the panel. do.

The thickness of the first outer film 21a of the upper polarizer 20a is limited with the parameter of the room temperature recovery rate, and preferably has a thickness of 8 to 100 占 퐉, more preferably 25 to 35 占 퐉. Such a thickness may be a configuration including a minimum protective film and an additional functional layer, and may be a thickness suitable for a thin polarizer required in recent markets. If the thickness of the polarizer is less than the above range, there is a possibility that the external stimulus may shrink, and the bending of the polarizer can not sufficiently prevent the force. On the other hand, Adjust accordingly.

The ratio of the thickness of each of the outer films 21a and 43a of the upper polarizer 20a and the lower polarizer 40a to the thickness of the inner films 23a and 41a The thickness ratio is limited. This limitation is such that the lower polarizing plate 40a can sufficiently resist the warping of the upper polarizing plate 20a.

Preferably, the thickness ratio of each film is expressed by the following equation (2).

&Quot; (2) "

Figure pat00004

(In the above equation (2)

T 1 is the thickness of the second outer film of the upper polarizer,

T 2 is the thickness of the second inner film of the upper polarizer,

T 3 is the thickness of the first inner film of the lower polarizer plate,

And T 4 is the thickness of the first outer film of the lower polarizer plate)

Preferably, the thickness of the first outer film 21a of the upper polarizer 20a satisfies Equation (1), and the thickness of the first inner film 23a of the upper polarizer 20a is 5 to 80 탆 , Preferably 20 to 50 탆.

The second inner film 41a of the lower polarizing plate 40a has a thickness of 5.5 to 60 占 퐉, preferably 20 to 50 占 퐉, so as to satisfy the formula (1), and the second outer film 41a of the lower polarizing plate 40a, (43a) has a thickness of 20 to 200 mu m, preferably 50 to 100 mu m.

The components of the liquid crystal display according to the first embodiment of the present invention will now be described.

The first and second polarizers 22a and 42a of the upper and lower polarizers 20a and 40a are polyvinyl alcohol films in which the dichroic dye is adsorbed and oriented.

In this case, the first and second polarizers 22a and 42a are usually formed by a process of uniaxially stretching a polyvinyl alcohol based resin film, a step of dyeing the stretched film with a dichroic dye to adsorb the dye, A step of treating with a boric acid aqueous solution, and a step of washing with water. At this time, iodine or dichroic organic dyes can be used as the dichroic dye.

The first outer film 21a and the first inner film 23a of the upper polarizer 20a may be at least one protective film at a position in contact with the first polarizer 22a and may further function as a polarizer Which may include multiple functional layers. Similarly, the second inner film 41a and the second outer film 43a of the lower polarizer 40a may be at least one protective film at a position in contact with the second polarizer 42a, and further, the function of the polarizer May include a plurality of functional layers capable of performing various functions.

The protective film is not particularly limited in the present invention, and any transparent material known in the art can be used. Typically, the protective film includes polyester resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate and polybutylene terephthalate; Cellulose-based resins such as diacetylcellulose and triacetylcellulose; Polycarbonate resin; Acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene resins such as polystyrene and acrylonitrile-styrene copolymer; Polyolefin resins such as polyethylene, polypropylene, cycloolefins or polyolefins having a norbornene structure, and ethylene-propylene copolymers; Vinyl chloride resin; Amide resins such as nylon and aromatic polyamide; Imide resin; Polyether sulfone type resin; Sulfone based resin; Polyether sulfone type resin; Polyether ether ketone resin; A sulfided polyphenylene resin; Vinyl alcohol-based resin; Vinylidene chloride resins; Vinyl butyral resin; Allylate series resin; Polyoxymethylene type resin; A thermoplastic resin such as an epoxy resin, and the like. A film composed of the blend of the thermoplastic resin may also be used. Further, a film made of a thermosetting resin such as (meth) acrylic, urethane, acrylic urethane, epoxy, or silicone or a film made of an ultraviolet curable resin may also be used. Preferably, at least one selected from the group consisting of cycloolefin polymer (COP), cycloolefin copolymer (COC), polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC), polysulfone (PSF), and polymethyl methacrylate PMMA) may be used.

The thickness of the protective film is not particularly limited, but if it is too thin, the strength and workability are deteriorated. If it is too thick, the transparency is degraded or the curing time becomes longer after being laminated to the polarizer. The thickness of these protective films is preferably 5 to 200 占 퐉, preferably 10 to 170 占 퐉, more preferably 20 to 100 占 퐉.

Further, surface treatment such as plasma treatment, corona treatment, ultraviolet ray irradiation treatment, frame (flame) treatment or saponification treatment can be appropriately performed on the surface of the polarizer to be bonded to the protective film.

The functional layer usable in combination with the protective film may be at least one selected from the group consisting of an adhesive layer, a pressure-sensitive adhesive layer, a hard coating layer, an antireflection layer, an antisticking layer, a diffusion preventing layer, an antiglare layer, a retardation compensation layer, a viewing angle compensating layer, It can be selected one species.

Such a functional layer can be used by forming a layer or forming a film through treatment. At this time, the layer forming method and the film production are not limited to the present invention but follow a known method. In the case of the film, a commercially available product can be purchased and used. However, the composition and thickness of each layer are not particularly limited in the present invention, and any film having a composition and thickness range commonly used in the art can be used, and preferably has a thickness satisfying the formula (2).

As the adhesive layer, for example, a solvent type adhesive, an emulsion type adhesive, a pressure sensitive adhesive, a wetting adhesive, a polycondensation adhesive, a solventless adhesive, a film adhesive, a hot melt adhesive and the like are used. Preferably, water-based adhesives such as isocyanate adhesives, polyvinyl alcohol adhesives, gelatin adhesives, vinyl polymer latex adhesives, water-soluble polyester adhesives, and urethane adhesives having a hydrophilic group are used.

The pressure-sensitive adhesive layer may be a coating layer of an acrylic type, a silicone type, a rubber type, a urethane type, a polyester type or an epoxy type copolymer, preferably an acrylic copolymer, more preferably a pressure-sensitive acrylic pressure-sensitive adhesive. At this time, the pressure sensitive adhesive composition may contain a known antistatic agent such as an alkali metal salt, an ionic compound, a conductive polymer, a metal oxide, CNT and the like. Among them, it is more preferable to include an ionic compound. Preferably, the pressure-sensitive adhesive layer comprises a copolymer containing a crosslinkable functional group, a crosslinking agent and a silane coupling agent.

The hard coat layer serves to protect the surface of the liquid crystal display device. The hard coat layer is mainly a transparent acrylic resin, or a coating layer containing various additives, inorganic particles and the like together with organic silicone, melamine and epoxy resins.

The antireflection layer is formed for the purpose of preventing reflection of external light on the surface of the polarizing plate and can be achieved by forming a conventional antireflection film or the like.

The anti-glare treatment is carried out for the purpose of preventing external light from being reflected from the surface of the polarizing plate to inhibit the visibility of the light transmitted through the polarizing plate, and the like. For example, the anti- By providing a fine uneven structure on the surface of the transparent protective film by a suitable method such as a roughening method by an embossing method or a blending method of transparent fine particles.

The diffusion barrier is used to control the glare and scattering light associated with the viewing angle and resolution. Optical function films using diffusion, scattering, and / or refraction may also be used as diffusion control films.

The anti-glare layer is for preventing glare, and is usually made of a transparent resin such as TiO 2 , ZrO 2 , Al 2 O 3 , In 2 O 3 , ZnO, SnO 2 , Sb 2 O 3 , ITO and it consists of a composition containing a matting particles (matting particle) such as SiO 2.

The retardation compensation layer may also be referred to as a retardation compensation film or retarder, and may be a retardation film or a retardation film, and may include not only a 1/4 plate but also an appropriate film such as a stretched film of any kind of polymer by a suitable one- or two-axis method, a polymer film oriented in the Z- A plate showing a phase difference can be used.

The viewing angle compensation layer is a layer for widening the viewing angle so that the image is relatively clear even when viewed in a direction slightly tilted rather than perpendicular to the screen. The viewing angle compensation layer is a layer which is the same as or similar to the retardation compensation layer, Or the like, an alignment film such as a liquid crystal polymer supported on a transparent substrate, or the like.

The brightness enhancement film is used to suppress the absorption loss or the like due to the polarizer and to obtain an improvement in brightness. Examples of such a brightness enhancement film include a film (for example, a 3M film) that transmits linear polarized light having a predetermined polarization axis, but reflects other light components, such as a multilayer laminate of a dielectric or a thin film having a different refractive index anisotropy "D-BEF").

In one example, the functional layer may be a hard coating layer, a pressure-sensitive adhesive layer or an anti-adhesion layer (or film), a brightness enhancement film, or a retardation compensation layer (or film).

Preferably, the first outer film 21a is a surface-treated or untreated surface-protective film (TAC), and the first inner film 22a is adhered to the transparent protective film ZRT The second inner film 41a is an adhesive layer or a transparent protective film ZRT and an adhesive layer and the second outer film 43a is a luminance improving film having a surface protective film TAC, Lt; / RTI >

In the liquid crystal display device having the above-described laminated structure, the panel warpage is significantly reduced, and the panel warpage is measured by leaving the liquid crystal panel at 80 DEG C for 500 hours, then leaving it at 23 DEG C and 50% relative humidity for 2 hours, . At this time, the amount of flexural deformation can be measured by a three-dimensional measuring machine. In the present invention, the amount of flexural deformation was measured using the above-mentioned three-dimensional measuring machine using a three-dimensional measuring machine (equipment name: VMR-6555) manufactured by Nikon.

The panel warpage is represented by ∪ type as + bending and ∩ type as - bending. A lower value of the measured absolute value at this time means that the panel warpage is smaller as the measured absolute value is smaller.

According to a preferred embodiment of the present invention, when the above equations (1) and (2) are satisfied, the absolute value of the panel warpage satisfies 300 or less, and it is confirmed that the light leakage phenomenon does not occur.

[Second embodiment]

The same applies to the case where the absorption axes of the upper and lower polarizing plates are different from each other in relation to the bending phenomenon.

FIG. 5 is a perspective view showing a liquid crystal panel and a polarizing plate according to a second embodiment of the present invention, FIG. 6 is a sectional view showing a liquid crystal panel and a polarizing plate according to a second embodiment of the present invention, FIG. 3 is a view showing a bending state of a liquid crystal panel and polarizing plates according to an embodiment.

Referring to FIG. 5, in the liquid crystal display device according to the second embodiment, the upper polarizer 20b and the lower polarizer 40b are disposed with the liquid crystal panel 30b as a center.

Preferably, the absorption axis of the upper polarizer 20a is -10 to 10 °, and the absorption axis of the lower polarizer 40a is 80 to 100 °, and they are arranged so that the absorption axis is 90 °. The absorption axis of the upper polarizer 20b in Fig. 5 is 90 [deg.], And the absorption axis of the lower polarizer 40b is 0 [deg.].

6, the upper polarizer 20b is laminated from the top in the order of the first outer film 21b, the first polarizer 22b and the first inner film 23b, and the lower polarizer 40b is laminated in the order of the second The inner film 41b, the second polarizer 42b, and the second outer film 43b are stacked in this order.

7 (A), the upper polarizer 20b is vertically contracted to cause an n-type deflection, and the lower polarizer 40b is horizontally contracted

7 (B) and (C), the upper polarizer 20a is deflected to a height H1 and the lower polarizer 40b is deflected to a height H2.

As described above, the deflection of the polarizing plate is limited by the room temperature recovery rate, the thickness of the first outer film 21b, the thickness ratio of the outer films 21b and 43b of the upper polarizer 20b and the lower polarizer 40b, It can be solved by limiting the thickness ratio of each inner film 23b, 41b.

The constitution, material and material of the first and second polarizers 22b and 42b, the first and second inner films 23b and 43b and the first and second outer films 21b and 41b shown in the second embodiment, The thickness is as described in the first embodiment.

[Third embodiment]

In addition, the warpage of the polarizer can be further suppressed by controlling the physical properties of the pressure-sensitive adhesive layer used for joining the layers when the outer film of the lower polarizer plate has a multilayer structure.

8 is a cross-sectional view illustrating a liquid crystal panel and a polarizing plate according to a third embodiment of the present invention.

Referring to FIG. 8, the liquid crystal display according to the present invention includes two polarizing plates 20c and 40c on the upper and lower portions of a liquid crystal panel 30c.

At this time, the upper polarizer 20c has a structure in which the first outer film 21c, the first polarizer 22c, and the first inner film 23c are stacked in this order from the top.

The lower polarizer 40c is formed by laminating a second inner film 41c and a second polarizer 42c from the upper portion and a first lower outer film 44c and second The lower outer film 46c is positioned, and the pressure-sensitive adhesive layer 45c is positioned therebetween.

The first and second polarizers 22c and 42c, the first and second inner films 23c and 43c and the first and second outer films 21c and 41c shown in the third embodiment are the same as the first embodiment As shown in Fig. Preferably, the second lower outer film 46c may be a protective film.

At this time, the pressure-sensitive adhesive layer 25c has a modulus of 50 to 300 MPa at 80 캜. The pressure-sensitive adhesive layer 25c has a high modulus of elasticity at a high temperature, thereby inducing stress relaxation as a whole, and effectively suppressing warping of the lower polarizer 40c and consequently warping of the liquid crystal panel.

The pressure-sensitive adhesive layer (25c) is preferably a pressure-sensitive adhesive (PSA), and the specific composition is not particularly limited in the present invention, and any material capable of satisfying the elastic modulus can be used. Typically, it can be formed of a conventional pressure sensitive adhesive such as acrylic, silicone, polyester, polyurethane, polyamide, polyether, fluorine or rubber. In consideration of moldability of a liquid crystal display device which is excellent in quality and durability, such as peeling due to moisture absorption, prevention of bubble generation, distortion of a liquid crystal panel due to a difference between thermal expansion coefficients, It is preferable that the moisture absorption rate is low and the heat resistance is excellent. Further, in consideration of optical characteristics, it is preferable that any high-temperature treatment such as curing or drying is not required, or that long-term curing or drying is not required. From this point of view, an acrylic pressure sensitive adhesive is preferably used.

The pressure-sensitive adhesive layer 25c is formed to a thickness of 5 to 200 탆, more preferably 10 to 50 탆.

It can be seen that the liquid crystal display according to the first to third embodiments of the present invention has a good level of light leakage since there is little warping of the panel.

In this case, the liquid crystal display device is not particularly limited, and liquid crystal display devices of various driving methods such as reflective type, transmissive type and transflective type liquid crystal display (LCD) and TN type, STN type, OCB type, HAN type, VA type, Device (LCD) can be preferably used.

In the present invention, since the liquid crystal display device is well known to those skilled in the art, detailed description of each configuration will be omitted.

[Example]

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.

Experimental Example  1: room temperature Recovery rate  Measure

After selecting the film to be used as the outer film of the polarizing plate, the room temperature recovery rate was measured based on the formula (1), and the results are shown in Table 1 below. The types of films used in this case are shown in Table 1, and the numbers before the letters indicate the film thickness.

film L O L 1 Room temperature recovery rate (%) division 40TAC 99.8338 99.9057 0.072 Triacetyl cellulose, Konica Minolta products 25TAC 99.7833 99.8757 0.093 Triacetyl cellulose, Konica Minolta products 23COP 100.0009 99.9985 -0.002 Polyolefin-based resin film, Zeon Corporation (Japan)

Experimental Example  2: Panel bending analysis

Polarizing plates having the structures shown in Table 2 below were mounted on top and bottom of a 5.5 inch panel (0.4T) manufactured by LG Display Co., Ltd. As shown in Table 3 below, the thickness of each polarizing plate was adjusted, Light leakage was observed.

The abbreviations (abbreviated) of each product used in the table are as shown below, and the numbers before the product names mean the thickness (탆).

- TAC: triacetyl cellulose, Konica Minolta Co. (Japan)

       Product name KC2UAW, thickness 25 탆

- ZRT: triacetyl cellulose, Konica Minolta Co. (Japan)

       KC2CT1W, thickness 20 占 퐉

- PSA: pressure-sensitive acrylic pressure-sensitive adhesive layer, Lin Tex (Japan)

- APF: brightness enhancement film, 3M (USA) available from Sumitomo 3M Company

- COP: polyolefin resin film, Xeon (Japan)

       Product name ZEONOR, thickness 25 탆

The first outer film The second outer film The first inner film The second inner film One 25COP + 5 (surface treatment) 25TAC + 18PSA + 19APF 20ZRT + 20PSA 20ZRT + 20PSA 2 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 20ZRT + 20PSA 20ZRT + 20PSA 3 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 20ZRT + 20PSA 4 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 15ZRT + 20PSA 5 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 13ZRT + 20PSA 6 25COP + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 20PSA 7 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA 8 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA

(1) Panel bending measurement

The panel warpage (탆) was obtained by leaving the liquid crystal panel at 80 캜 for 500 hours, then leaving the panel under conditions of 23 캜 and 50% relative humidity for 2 hours, The difference in height of warpage was measured

(2) Light beam  observe

The prepared liquid crystal display was allowed to stand in an oven at 80 DEG C for 500 hours and then left at room temperature for 2 hours, and then mounted on a backlight to observe whether light leakage occurred.

○: Light leakage occurs at the edge.

Δ: Light leakage occurs at the edge part finely.

×: Light leakage phenomenon does not occur.

division Room temperature recovery rate (%) T 1 / T 4 T 2 / T 3 Panel warpage (탆) Light leakage phenomenon One 0.02 0.48 1.0 -580 ○ 2 0.07 to 0.15 0.48 1.0 -580 ○ 3 0.07 to 0.15 0.48 1.1 -290 × 4 0.07 to 0.15 0.48 1.3 -180 × 5 0.07 to 0.15 0.48 1.4 -90 × 6 0.02 0.48 2.3 355 △ 7 0.07 to 0.15 0.47 1.3 -80 × 8 0.07 to 0.15 0.47 1.3 320 △ - T 1 : thickness of the first outer film
- T 2 : thickness of the first inner film
- T 3 : thickness of the second inner film
- T 4 : thickness of the second outer film

In the numerical values of the panel warpage, + denotes warpage of ∪, and - denotes warpage of ∩ type. At this time, an absolute value of 300 or less is judged as a good range.

Referring to Table 3, when the room temperature recovery rate is 0.07 to 0.15% under the same thickness ratio, the panel warping phenomenon is reduced, and as a result, the light leakage phenomenon does not occur.

Experimental Example  3: Thickness ratio  Analysis of panel bending phenomenon

The polarizers shown in Table 4 below were mounted on the top and bottom of a 5.5-inch panel (0.4T) manufactured by LG Display Co., Ltd. As shown in Table 5 below, the thickness of each polarizer was adjusted and the panel warpage was measured. The phenomenon was observed.

The upper polarizer plate The lower polarizer plate The upper polarizer plate The lower polarizer plate The first outer film The second outer film The first inner film The second inner film One 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 20ZRT + 20PSA 20ZRT + 20PSA 2 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 20ZRT + 20PSA 3 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 15ZRT + 20PSA 4 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 13ZRT + 20PSA 5 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF 25ZRT + 20PSA 20PSA 6 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V3 20ZRT + 20PSA 20ZRT + 20PSA 7 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 20ZRT + 20PSA 8 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 15ZRT + 20PSA 9 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 13ZRT + 20PSA 10 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 20PSA 11 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V2-HC 20ZRT + 20PSA 20ZRT + 20PSA 12 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 20ZRT + 20PSA 13 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA 14 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 13ZRT + 20PSA 15 25 TAC + 5 (surface treatment) 25TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 20PSA 16 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF 20ZRT + 20PSA 20ZRT + 20PSA 17 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF 25ZRT + 20PSA 20ZRT + 20PSA 18 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF 25ZRT + 20PSA 15ZRT + 20PSA 19 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF 25ZRT + 20PSA 13ZRT + 20PSA 20 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF 25ZRT + 20PSA 20PSA 21 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V3 20ZRT + 20PSA 20ZRT + 20PSA 22 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 20ZRT + 20PSA 23 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 15ZRT + 20PSA 24 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 13ZRT + 20PSA 25 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V3 25ZRT + 20PSA 20PSA 26 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V2-HC 20ZRT + 20PSA 20ZRT + 20PSA 27 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 20ZRT + 20PSA 28 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA 29 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 13ZRT + 20PSA 30 25 TAC + 5 (surface treatment) 15TAC + 18PSA + 19APF-V2-HC 25ZRT + 20PSA 20PSA 29 25 TAC + 10 (surface treatment) 25 tax + 18PSA + 19APF 25ZRT + 20PSA 13ZRT + 20PSA 29 25TAC 25 tax + 18PSA + 19APF 25ZRT + 20PSA 13ZRT + 20PSA

T 1 T 4 T 1 / T 4 T 2 T 3 T 2 / T 3 Panel warpage (탆) Light leakage phenomenon One 30 62 0.48 40 40 1.0 -580 ◎ 2 30 62 0.48 45 40 1.1 -290 × 3 30 62 0.48 45 35 1.3 -180 × 4 30 62 0.48 45 33 1.4 -90 × 5 30 62 0.48 45 20 2.3 355 ○ 6 30 69 0.43 40 40 1.0 -578 ◎ 7 30 69 0.43 45 40 1.1 -286 × 8 30 69 0.43 45 35 1.3 -181 × 9 30 69 0.43 45 33 1.4 -87 × 10 30 69 0.43 45 20 2.3 352 ○ 11 30 74 0.41 40 40 1.0 -581 ◎ 12 30 74 0.41 45 40 1.1 -289 × 13 30 74 0.41 45 35 1.3 -180 × 14 30 74 0.41 45 33 1.4 -89 × 15 30 74 0.41 45 20 2.3 351 ○ 16 30 52 0.58 40 40 1.0 -480 ◎ 17 30 52 0.58 45 40 1.1 -190 × 18 30 52 0.58 45 35 1.3 -80 × 19 30 52 0.58 45 33 1.4 10 × 20 30 52 0.58 45 20 2.3 455 ◎ 21 30 59 0.51 40 40 1.0 -478 ◎ 22 30 59 0.51 45 40 1.1 -186 × 23 30 59 0.51 45 35 1.3 -81 × 24 30 59 0.51 45 33 1.4 13 × 25 30 59 0.51 45 20 2.3 452 ◎ 26 30 64 0.47 40 40 1.0 -481 ◎ 27 30 64 0.47 45 40 1.1 -189 × 28 30 64 0.47 45 35 1.3 -80 × 29 30 64 0.47 45 33 1.4 11 × 30 30 64 0.47 45 20 2.3 451 ◎ 29 35 62 0.56 45 33 1.4 29 × - T 1 : thickness of the first outer film
- T 2 : thickness of the first inner film
- T 3 : thickness of the second inner film
- T 4 : thickness of the second outer film

Referring to Table 5, when the value of T 1 / T 4 is 0.41 to 0.58, and the value of T 2 / T 3 is in the range of 1.1 to 1.4, the absolute value of the panel warpage is 300 or less. In this case, .

Experimental Example  4: The pressure- Modulus of elasticity  Analysis of panel bending phenomenon

The polarizers shown in Table 6 below were mounted on the top and bottom of the 5.5 inch panel (0.4T) of LG Display Co., Ltd. As shown in Table 7 below, the thickness of each polarizer was adjusted, Were observed.


 The first outer film The second outer film The first inner film
The second inner film
The first lower outer film The pressure-sensitive adhesive layer (elastic modulus) The second lower outer film One 25 TAC + 5 (surface treatment) 15TAC 18 PSA (50 MPa) 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA 2 25 TAC + 5 (surface treatment) 15TAC 18 PSA (200 MPa) 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA 3 25 TAC + 5 (surface treatment) 15TAC 18 PSA (300 MPa) 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA 4 25 TAC + 5 (surface treatment) 15TAC 18 PSA (350 MPa) 19APF-V2-HC 25ZRT + 20PSA 15ZRT + 20PSA

T 1 T 4 T 1 / T 4 T 2 T 3 T 2 / T 3 Panel warpage (탆) Light leakage phenomenon One 30 64 0.47 45 35 1.3 -80 × 2 30 64 0.47 45 35 1.3 -120 × 3 30 64 0.47 45 35 1.3 -170 × 4 30 64 0.47 45 35 1.3 -315 ○ - T 1 : thickness of the first outer film
- T 2 : thickness of the first inner film
- T 3 : thickness of the second inner film
- T 4 : thickness of the second outer film

Referring to Table 7, when the modulus of elasticity of the interlayer pressure sensitive adhesive layer located between the outer films of the lower polarizer is 50 to 300 MPa, the panel warpage is 300 or less. When the modulus of elasticity is 350, panel warpage is -315, It can be seen that the modulus of elasticity of the pressure-sensitive adhesive layer is a factor affecting the panel bending phenomenon.

When the graph is plotted, the modulus of elasticity and the panel warp tend to decrease linearly, and it can be seen that the panel bending phenomenon of the liquid crystal display device is effectively controlled only by controlling the modulus of elasticity of the pressure-sensitive adhesive layer.

1: liquid crystal display device 10: backlight unit
11: light source 12: reflector
13: light guide plate 14: diffusion plate
20, 20a, 20b, 20c: upper polarizer plate 21a, 21b, 21c:
22a, 22b, 22c: first polarizer 23a, 23b, 23c:
30: liquid crystal panel 40, 40a, 40b, 40c: lower polarizer plate
41a, 41b, 41c: second inner film 42a, 42b, 42c: second polarizer
43a, 43b, 43c: the second inner film

Claims (9)

A liquid crystal panel is disposed between the upper polarizer and the lower polarizer,
The upper polarizer includes a first outer film, a first polarizer, and a first inner film laminated from above,
Wherein the lower polarizer plate has a structure in which a second inner film, a second polarizer and a second outer film are laminated from the top,
Wherein the first outer film of the upper polarizer has a room temperature recovery rate of 0.07 to 0.15% represented by the following formula (1): < EMI ID = 1.0 >
[Equation 1]
Figure pat00005

(In the above formula (1)
L 0 is the length in the MD direction after leaving the film of 100 * 100 mm size at 80 ° C (dry) for 24 hours,
L 1 means the length in the MD direction after leaving the film of 100 * 100 mm size again at 23 ° C / 50% RH for 24 hours) The liquid crystal display device according to claim 1, wherein each film of the upper polarizer and the lower polarizer has a thickness ratio satisfying the following formula (2)
&Quot; (2) "
Figure pat00006

(In the above equation (2)
T 1 is the thickness of the first outer film,
T 2 is the thickness of the first inner film,
T 3 is the thickness of the second inner film,
T 4 is the thickness of the second outer film) The method according to claim 1, wherein the first outer film has a thickness of 8 to 100 탆,
The thickness of the first inner film is 5 to 80 탆,
The thickness of the second inner film is 5.5 to 60 탆,
And the thickness of the second outer film is 20 to 200 mu m. The liquid crystal display according to claim 1, wherein the absorption axis of the upper polarizer is 80 to 100 °, the absorption axis of the lower polarizer is -10 to 10 °,
Wherein the upper and lower polarizers are disposed such that the absorption axes thereof are at 90 degrees with respect to each other. The liquid crystal display according to claim 1, wherein the absorption axis of the upper polarizer is -10 to 10 °, the absorption axis of the lower polarizer is 80 to 100 °,
Wherein the upper and lower polarizers are disposed such that the absorption axes thereof are at 90 degrees with respect to each other. [4] The liquid crystal display of claim 1, wherein the first outer film, the first inner film, the second inner film, and the second outer film include at least one protective film positioned in contact with each of the polarizers. The liquid crystal display of claim 6, wherein the first outer film, the first inner film, the second inner film, and the second outer film further comprise a functional layer. 8. The optical information recording medium according to claim 7, wherein the functional layer is formed of a material selected from the group consisting of an adhesive layer, a pressure-sensitive adhesive layer, a hard coating layer, an antireflection layer, an antistiction layer, a diffusion prevention layer, an antiglare layer, a retardation compensation layer, a viewing angle compensation layer, And one selected from the group consisting of the liquid crystal molecules. The liquid crystal display of claim 1, wherein the second outer film has a multilayer structure of a first lower outer film / pressure-sensitive adhesive layer / a second lower outer film, wherein the pressure-sensitive adhesive layer has an elastic modulus of 50 to 300 MPa.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018200355A (en) * 2017-05-26 2018-12-20 エルジー ディスプレイ カンパニー リミテッド Electrooptical panel
KR20190100402A (en) * 2017-02-13 2019-08-28 코니카 미놀타 가부시키가이샤 Liquid crystal display device and a pair of optical film used for this liquid crystal display device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040016382A (en) 2002-08-16 2004-02-21 후지 샤신 필름 가부시기가이샤 Polarizing plate and its production
KR20080071743A (en) 2007-01-31 2008-08-05 주식회사 엘지화학 Polarizer having pressure-sensitive adhesive layer with improved light-leakage property
KR20110037001A (en) 2009-10-05 2011-04-13 삼성전자주식회사 Polarizer and display device having the polarizer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040016382A (en) 2002-08-16 2004-02-21 후지 샤신 필름 가부시기가이샤 Polarizing plate and its production
KR20080071743A (en) 2007-01-31 2008-08-05 주식회사 엘지화학 Polarizer having pressure-sensitive adhesive layer with improved light-leakage property
KR20110037001A (en) 2009-10-05 2011-04-13 삼성전자주식회사 Polarizer and display device having the polarizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190100402A (en) * 2017-02-13 2019-08-28 코니카 미놀타 가부시키가이샤 Liquid crystal display device and a pair of optical film used for this liquid crystal display device
JP2018200355A (en) * 2017-05-26 2018-12-20 エルジー ディスプレイ カンパニー リミテッド Electrooptical panel

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