WO2014204165A9 - 편광판 및 이를 포함하는 디스플레이 장치 - Google Patents
편광판 및 이를 포함하는 디스플레이 장치 Download PDFInfo
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- WO2014204165A9 WO2014204165A9 PCT/KR2014/005284 KR2014005284W WO2014204165A9 WO 2014204165 A9 WO2014204165 A9 WO 2014204165A9 KR 2014005284 W KR2014005284 W KR 2014005284W WO 2014204165 A9 WO2014204165 A9 WO 2014204165A9
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- Prior art keywords
- film
- polarizing plate
- polarizing
- axis direction
- protective film
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- 239000010408 film Substances 0.000 claims description 212
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- 210000002858 crystal cell Anatomy 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 229920002284 Cellulose triacetate Polymers 0.000 claims description 6
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- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 230000004313 glare Effects 0.000 claims description 3
- 229920000636 poly(norbornene) polymer Polymers 0.000 claims description 3
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- 239000003381 stabilizer Substances 0.000 claims description 2
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Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- 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
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8793—Arrangements for polarized light emission
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
-
- 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
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
Definitions
- the present invention relates to a polarizing film; And a protective film provided on the polarizing film, and a display device including the polarizing plate.
- LCD liquid crystal display
- Polarizer is one of the important parts of flat panel displays such as LCD and organic EL.
- a liquid crystal display panel has a configuration in which polarizing films are bonded to both surfaces of a liquid crystal cell.
- a general form of such a polarizing plate is schematically illustrated.
- the polarizing plate 1 includes protective films 2 and 3 attached to both sides of the central polarizing film 6 and the polarizing film 6 via adhesive layers 4 and 5 do.
- the protective films (2, 3) are disposed on the upper and lower sides of the polarizing film (6) to prevent the polarizing film (6) from being damaged.
- the present invention relates to a polarizing film; And a protective film provided on the polarizing film, and a display device including the polarizing plate.
- One embodiment of the present disclosure relates to a polarizing element comprising a polarizing film; And at least one protective film provided on the polarizing film,
- the shrinkage force of the polarizing plate is in the range of 25 ⁇ ⁇ and 50% relative humidity in the direction of the transmission axis direction and the absorption axis direction in the direction where the temperature is more than 25 ⁇ ⁇ and the relative humidity is more than 50% And a polarizing plate of 39 kgf or less per 1 mm.
- Another embodiment of the present invention provides a display device including the polarizer.
- Another embodiment of the present disclosure relates to a liquid crystal cell; An upper polarizer including the polarizer provided on one side of the liquid crystal cell; And a lower polarizer plate including the polarizer plate provided on the other side of the liquid crystal cell.
- a polarizing plate having a low shrinking force is used, so that there is an advantage that a force remaining on the polarizing plate is small.
- the bending phenomenon that warps the glass substrate is reduced.
- FIG. 1 is a schematic view showing a general form of a polarizing plate.
- FIG. 2 is an example of an elongation-force graph for measuring retraction force in the present specification.
- FIGS. 3 and 4 are graphs for analyzing the correlation between the contracting force (X axis) and the bending (Y axis) of the polarizing plate in one embodiment of the present invention.
- 5 is a plan view and a side view of the sample in Experimental Example 1
- FIG. 6 is a view for measuring the degree of bending in Experimental Example 1.
- the present invention relates to a polarizing film; And at least one protective film provided on the polarizing film.
- the present specification discloses a polarizing plate in which the polarizing plate is shrunk in the direction of the transmission axis direction and the absorption axis direction in a condition where the temperature is more than 25 ° C and the relative humidity is more than 50% and the temperature is 25 ° C and the relative humidity is 50% Thereby providing a polarizing plate having a low shrinking force.
- " the direction in which the polarizing plate is further contracted in the transmission axis direction and the absorption axis direction " means that when the average of the force to contract in the transmission axis direction and the average of the force to contract in the absorption axis direction are compared, It means big direction.
- the direction in which the polarizing plate is more contracted in the transmission axis direction and the absorption axis direction is a direction in which the polarizing plate placed on the measuring plate is bent by shrinkage, in a direction farther away from the measuring plate, .
- the condition "the temperature is more than 25 DEG C and the relative humidity is more than 50%” is not particularly limited as long as the temperature and the relative humidity are higher than 25 DEG C and 50%, respectively, and the polarizing plate is bent with respect to the measuring plate.
- the amount of bending was measured under the condition that the temperature and the relative humidity were 80 ° C respectively or the conditions where the temperature and the relative humidity were 60 ° C and 90%.
- Polarizing plates manufactured through a series of processes may have residual forces applied during the process, which may cause deformation of the polarizing plate to shrink.
- the glass used also becomes thinner, so that the influence of the force to deform the polarizer shrinks is increasing. Accordingly, there is a need to adjust the bending shape of the glass by reducing the shrinkage force to be deformed by the polarizing plate.
- the applicant of the present invention obtained the results shown in FIG. 3 as a result of an experiment in which a polarizing plate attached to a glass substrate was allowed to stand in an 80 ° C chamber for 24 hours and then subjected to a bending test, that is, an experiment to measure the degree of warping. Referring to FIG. 3, it was found that the bending phenomenon decreases as the contracting force of the polarizer decreases.
- the first method is to reduce both the absorption axis and the contraction force in the transmission axis direction to 39 kgf / mm or less. Since the polarizing film is a film stretched in the absorption axis direction, the shrinking force in the absorption axis direction is high, but the shrinking force in the transmission axis direction is low. With this point, there is a method of increasing the shrinkage ratio in the transmission axis direction to warp in the direction of the transmission axis.
- One embodiment of the present disclosure relates to a polarizing element comprising a polarizing film; And at least one protective film provided on the polarizing film,
- the shrinkage force of the polarizing plate is 39 kgf / mm 2 in a range of the transmission axis direction and the absorption axis direction under the condition that the temperature is higher than 25 ° C and the relative humidity is higher than 50% in any one direction and the temperature is 25 ° C and the relative humidity is 50% Or less. In this case, there is a peak that can reduce the bending phenomenon that warps the substrate.
- the lowering of the shrinking force of the polarizing plate may further reduce the bending phenomenon of bending the substrate, so that the lower limit of the shrinking force is not particularly limited.
- the temperature in the transmission axis direction and the absorption axis direction is more than 25 deg.
- the shrinking force of the polarizing plate may be more than 0 kgf and less than 39 kgf per 1 mm width under the condition that the relative humidity is 50% or more and the temperature is 25 ° C and the relative humidity is 50%.
- the polarizing plate includes a protective film provided on one side of the polarizing film; And a pressure-sensitive adhesive layer provided on the other side of the polarizing film,
- the shrinking force of the protective film is set to 13 [mm] per 1 mm width under the condition that the temperature is 25 [deg.] C and the relative humidity is 50% kgf or less. In this case, there is a peak that can reduce the bending phenomenon that warps the substrate.
- the polarizing plate includes a protective film provided on one side of the polarizing film; A pressure-sensitive adhesive layer provided on the other side of the polarizing film; And another protective film between the polarizing film and the pressure-sensitive adhesive layer,
- the shrinking force of the another protective film in the one direction is 25 DEG C and the relative humidity is 50% It can be less than 11 kgf per mm.
- the polarizing film may be 15 kgf or less per 1 mm in width in either the absorption axis direction or the transmission axis direction under conditions of high temperature and high humidity than a state in which the temperature is 25 ⁇ and the relative humidity is 50%.
- the polarizing plate includes a protective film and a brightness enhancement layer sequentially provided on one side of the polarizing film; And a pressure-sensitive adhesive layer provided on the other side of the polarizing film,
- the shrinking force of the protective film is set to 7 [mm] per 1 mm width under the condition that the temperature is 25 [deg.] C and the relative humidity is 50% kgf or less, and the shrinkage force of the brightness enhancement layer is 21 kgf or less per 1 mm width. In this case, there is a peak that can reduce the bending phenomenon that warps the substrate.
- the protective film and the brightness enhancement layer may be adhered to each other by a pressure sensitive adhesive layer provided between the protective film and the brightness enhancement layer.
- the shrinking force of the membrane may be 15 kgf or less per 1 mm width.
- One embodiment of the present disclosure relates to a polarizing element comprising a polarizing film; And at least one protective film provided on the polarizing film,
- the shrinkage force of the polarizing plate is in the range of 25 ⁇ ⁇ and 50% relative humidity in the direction of the transmission axis direction and the absorption axis direction in the direction where the temperature is more than 25 ⁇ ⁇ and the relative humidity is more than 50% And a polarizing plate of 39 kgf or less per 1 mm. In this case, there is a peak that can reduce the bending phenomenon that warps the substrate.
- the lowering of the shrinking force of the polarizing plate may further reduce the bending phenomenon of bending the substrate, so that the lower limit of the shrinking force is not particularly limited.
- the temperature in the transmission axis direction and the absorption axis direction is more than 25 deg.
- the shrinking force of the polarizing plate may be more than 0 kgf and less than 39 kgf per 1 mm width under the condition that the temperature is 25 ° C and the relative humidity is 50% in the direction in which the polarizing plate is further contracted in the condition that the relative humidity is more than 50%.
- the polarizing plate includes a protective film provided on one side of the polarizing film; And a pressure-sensitive adhesive layer provided on the other side of the polarizing film,
- the polarizing plate includes a protective film provided on one side of the polarizing film; A pressure-sensitive adhesive layer provided on the other side of the polarizing film; And another protective film between the polarizing film and the pressure-sensitive adhesive layer,
- the polarizing film may have a shrinking force of 15 kgf or less per mm in width in a direction in which the polarizing plate is bent in a condition of high temperature and high humidity, in a condition of a temperature of 25 ⁇ and a relative humidity of 50%.
- the polarizing plate includes a protective film and a brightness enhancement layer sequentially provided on one side of the polarizing film; And a pressure-sensitive adhesive layer provided on the other side of the polarizing film,
- the brightness enhancement layer has a shrinking force of 21 kgf or less per 1 mm width. In this case, there is a peak that can reduce the bending phenomenon that warps the substrate.
- the protective film and the brightness enhancement layer may be adhered to each other by a pressure sensitive adhesive layer provided between the protective film and the brightness enhancement layer.
- the temperature in the direction of the transmission axis direction and the absorption axis direction, in the direction in which the polarizing plate is further contracted under the condition that the temperature is higher than 25 DEG C and the relative humidity is higher than 50%, the temperature is 25 DEG C and the relative humidity is 50%
- the shrinking force of the polarizing film may be 15 kgf or less per 1 mm width.
- the contractive force means a force which is intended to be restored to its original state after the film is deformed. Since the force at the time of actual shrinkage is difficult to measure, it is necessary to estimate the shrinkage force by measuring the force necessary for forcibly stretching (stretching) the film. In other words, it shows that the tensile strength shows the contractive force. As a result, it is judged that the tensile strength can cope with the contractive force.
- the contractile force (tensile strength) is measured by the following method.
- sample width was cut to 10 mm and length was set to 150 mm, and then longitudinal direction was set in a universal material testing machine, and either one of the fixed ends was pulled.
- Polarizer manufacturers have been conducting a lot of studies to reduce the bending force at high temperature or high temperature and high humidity conditions. However, it has been very difficult to quantify the retraction force of the polarizing plate under high temperature or high temperature and high humidity conditions. The present applicant has made efforts to find a factor representing contractive force. As a result, the tensile strength is measured at normal temperature and humidity conditions, and the value obtained by converting the unit of kgf / mm 2 into kgf / mm represents the contractive force I got it.
- a film having a high shrinkage in the transmission axis direction may be laminated with the polarizing film to induce bending in the transmission axis direction to lower the contracting force in the bending direction.
- the shrinkage amount refers to a dimensional change amount that rapidly changes when taken out from the high temperature and high humidity chambers. In order to warp in the direction of the permeation axis, sudden dimensional contraction must occur in the direction of the permeation axis as soon as it is removed from the chamber.
- the shrinkage force of the protective film is set to 13 kgf per 1 mm width under the condition that the temperature in the transmission axis direction and the absorption axis direction exceeds 25 DEG C and the relative humidity exceeds 50% Or less.
- the shrinkage force of the polarizing membrane is 15 kgf or less per 1 mm width under the condition that the temperature in the transmission axis direction and the absorption axis direction exceeds 25 ° C and the relative humidity exceeds 50% in any one direction and the temperature is 25 ° C and the relative humidity is 50% .
- the polarizing plate shrinks due to the residual force left on the polarizing plate and the bending phenomenon of the glass is reduced by using a polarizing plate having a low shrinking force in the absorption axis direction or the transmission axis direction.
- the material and manufacturing method of the polarizing film are not particularly limited as long as the polarizing plate provided with the protective film on one side or both sides of the polarizing film has shrinkage force satisfying the range of the present invention, Can be used.
- the polarizing film may be a polyvinyl alcohol polarizing film.
- the inventors of the present invention found that the shrinking force decreases as the thickness of the film decreases as the thickness of the film decreases.
- the thickness of the polarizing film may be more than 0 ⁇ and less than 50 ⁇ , and in this case, there is a peak at which bending phenomenon to bend the substrate can be reduced.
- the thickness of the polarizing film may be more than 0 ⁇ ⁇ to 10 ⁇ ⁇ or less. In this case, since the shrinking force of the polarizing film is lowered, there is a peak at which the bending phenomenon that warps the substrate can be further reduced.
- the material and the manufacturing method of the protective film are not particularly limited as long as the polarizing plate having the protective film in the polarizing film has the shrinking force that satisfies the range of the present invention, and it is possible to use a common material and manufacturing method known in the art .
- the protective film may include at least one film, and may be at least one of a COP (cycloolefin polymer) film, an acrylic film, a TAC (triacetylcellulose) film, a COC (cycloolefin copolymer) polynorbornene-based films and PET (polyethylene terephthalate) -based films.
- a COP cycloolefin polymer
- acrylic film an acrylic film
- TAC triacetylcellulose
- COC cycloolefin copolymer
- PET polyethylene terephthalate
- One embodiment of the present disclosure may include a pressure sensitive adhesive layer positioned on the polarizing film or protective film.
- " on the polarizing film " means the opposite side to the side where the protective film is provided with respect to the polarizing film, and the " on protective film " means the opposite side to the side where the polarizing film is provided based on the protective film.
- the pressure-sensitive adhesive layer is provided for application to a display device such as a liquid crystal display device.
- the surface provided with the pressure-sensitive adhesive layer may be adhered to a liquid crystal cell of a liquid crystal display element.
- the protective film adhered to the liquid crystal cell may have a specific retardation for viewing angle compensation.
- the protective film may include at least one additive selected from UV absorbers, anti-blocking agents, lubricants, antistatic agents and stabilizers, if necessary.
- an antireflection layer a low reflection coating layer, a UV absorption layer, a brightness enhancement layer, an antistatic coating layer, an antiglare layer, a liquid crystal coating layer, At least one layer may be additionally provided in the coating layer.
- the protective film may have a moisture permeability of 40 g / m 2 day or less.
- the protective film and the polarizing film may be adhered by an aqueous or non-aqueous adhesive.
- the polarizing plate is provided on one side of the polarizing film; And a pressure sensitive adhesive layer provided on the other side of the polarizing film, the pressure sensitive adhesive layer formed on the other side of the polarizing film is adhered to the liquid crystal cell, and the protective film provided on one side of the polarizing film is located outside do.
- the polarizing plate is provided on one side of the polarizing film; A pressure-sensitive adhesive layer provided on the other side of the polarizing film; And a pressure-sensitive adhesive layer adhered to the liquid crystal cell by a pressure-sensitive adhesive layer formed on the another protective film, wherein when the protective film is sandwiched between the polarizing film and the pressure-sensitive adhesive layer, Is located relatively outside.
- the outside protective film contains a UV absorbent or a UV absorbing layer on the upper or lower surface.
- a hard coating layer, a low reflection coating layer, and an anti glare layer are formed on the upper surface or the lower surface of the protective film located at the outer periphery of the upper polarizer plate, ) Layer may be further provided.
- a brightness enhancement layer may be further provided on the upper surface or the lower surface of the lower protective film positioned on the outer periphery of the lower polarizer plate relatively closer to the ground based on the liquid crystal cell.
- the inventors of the present invention found that the shrinking force decreases as the thickness of the film decreases as the thickness of the film decreases.
- the thickness of the protective film may be more than 0 ⁇ and less than 60 ⁇ . In this case, there is a peak at which the bending phenomenon that warps the substrate may be reduced.
- the thickness of the protective film may be in the range of 15 to 45 ⁇ m, and may be 20 to 30 ⁇ m if necessary.
- the thickness of the protective film made of acrylic film or TAC film is preferably 15 to 45 ⁇ m.
- the polarizing plate is shrunk in the direction of the transmission axis direction and the absorption axis direction in a condition where the temperature is more than 25 DEG C and the relative humidity is more than 50% Deg.] C and a relative humidity of 50%, the shrinking force of the protective film may be 13 kgf or less per 1 mm width, and there is a peak at which the bending phenomenon that warps the substrate may be reduced.
- Another embodiment of the present invention provides a display device including the polarizer.
- the display device may include a touch panel, a light emitting diode (LED), an organic light emitting diode (OLED), a liquid crystal display (LCD), and a thin film transistor- Liquid Crystal Display, LCD-TFT).
- LED light emitting diode
- OLED organic light emitting diode
- LCD liquid crystal display
- LCD-TFT thin film transistor- Liquid Crystal Display
- the thickness of the glass substrate provided in the display device may be 0.1 mm to 0.7 mm, and may be selected according to the applied device.
- Another embodiment of the present disclosure provides a liquid crystal display device including the polarizer.
- the liquid crystal display device may include a liquid crystal cell and the polarizer provided on one side or both sides of the liquid crystal cell.
- the liquid crystal cell and the polarizing plate can be bonded by the pressure-sensitive adhesive layer provided on the polarizing film or the protective film.
- a non-aqueous adhesive was used on both sides of a polyvinyl alcohol plate having a thickness of 12 ⁇ m and a shrinkage force of 35 kgf per 1 mm width and a shrinkage force of 7 kgf per 1 mm width in the structure shown in Table 1, And a COP film having a thickness of 23 ⁇ m were bonded to each other to produce a polarizing plate.
- the COP-based film has a thickness of 23 ⁇ ⁇ and the contractive force in the absorption axis direction is 6 kgf per 1 mm width and the contractive force in the transmission axis direction is 6 kgf per 1 mm width.
- a non-aqueous adhesive was used on both sides of a polyvinyl alcohol polarizing membrane having a thickness of 12 ⁇ m and a thickness of 12 ⁇ m and a shrinking force of 35 kgf per 1 mm width and a shrinking force of 7 kgf per 1 mm width in the transmission axis direction 1 protective film and the second protective film were adhered to each other to prepare a polarizing plate.
- a COP film having a thickness of 23 ⁇ ⁇ was used as the first protective film, and a liquid crystal coating layer having a thickness of 1 ⁇ ⁇ was formed on one side of the first protective film.
- the shrinking force in the absorption axis direction is 6 kgf per 1 mm width and the shrinking force in the transmission axis direction is 6 kgf per 1 mm width.
- a pressure-sensitive adhesive layer having a thickness of 22 mu m was formed on the liquid crystal coating layer.
- an acrylic film having a thickness of 40 ⁇ m was used as the second protective film, and a hard coating layer having a thickness of 5 ⁇ m was formed on one side of the second protective film.
- the shrinkage force of the acrylic film formed with the hard coat layer in the absorption axis direction is 18 kgf per 1 mm width and the shrinkage force in the transmission axis direction is 19 kgf per 1 mm width.
- a non-aqueous adhesive was used on both sides of a polyvinyl alcohol polarizing membrane having a thickness of 12 ⁇ m and a shrinking force of 35 kgf per 1 mm width and a shrinking force of 7 kgf per 1 mm width in the transmission axis direction, 1 protective film and the second protective film were adhered to each other to prepare a polarizing plate.
- An acrylic film having a thickness of 40 ⁇ ⁇ was formed as a first protective film.
- the shrinking force in the absorption axis direction is 16 kgf per 1 mm width and the shrinking force in the transmission axis direction is 17 kgf per 1 mm width.
- a pressure-sensitive adhesive layer having a thickness of 22 mu m was formed on one side of the first protective film.
- an acrylic film having a thickness of 40 ⁇ ⁇ was used as the second protective film, and an antiglare layer having a thickness of 5 ⁇ ⁇ was formed on one side of the second protective film.
- the shrinking force of the acrylic film formed with the anti-glare layer in the absorption axis direction is 19 kgf per 1 mm width and the shrinking force in the transmission axis direction is 21 kgf per 1 mm width.
- a non-aqueous adhesive was used on both sides of a polyvinyl alcohol polarizing membrane having a thickness of 12 ⁇ m and a thickness of 12 ⁇ m and a shrinking force of 35 kgf per 1 mm width and a shrinking force of 7 kgf per 1 mm width in the transmission axis direction 1 protective film and the second protective film were adhered to each other to prepare a polarizing plate.
- a COP film having a thickness of 23 ⁇ ⁇ was used as the first protective film, and a liquid crystal coating layer having a thickness of 1 ⁇ ⁇ was formed on one side of the first protective film.
- the shrinking force in the absorption axis direction is 6 kgf per 1 mm width and the shrinking force in the transmission axis direction is 7 kgf per 1 mm width.
- a pressure-sensitive adhesive layer having a thickness of 22 mu m was formed on the liquid crystal coating layer.
- a COP film having a thickness of 40 ⁇ ⁇ was used as the second protective film, and a hard coating layer having a thickness of 7 ⁇ ⁇ was formed on one side of the second protective film.
- the shrinking force of the COP film formed with the hard coat layer in the absorption axis direction is 6 kgf per 1 mm width and the shrinking force in the transmission axis direction is 7 kgf per 1 mm width.
- Samples were prepared in the size of 200 mm x 150 mm in the polarizing plate prepared in the above Examples and Comparative Examples. At this time, the sample was prepared so that the length in the direction of the absorption axis was long, that is, the length in the direction of the absorption axis was 200 mm.
- the thus prepared polarizer of 200 mm x 150 mm size was attached to the center of a glass substrate (0.4 mm thick) having a size of 210 mm x 160 mm to prepare a sample. Thereafter, the sample adhered to the glass substrate was allowed to stand in a chamber at 80 ⁇ and a humidity of 90% for 24 hours. After leaving for 24 hours in the chamber, it was taken out and then left for 24 hours at room temperature (25 degrees, 50% humidity) to measure bending.
- the degree of bending is measured by placing the sample on a flat stone table (placing the glass substrate in contact with the stone table), measuring the degree of elevation from the stoning table as shown in FIG. 6 by using a ruler at the positions 1 to 8 And measured using a three-dimensional measuring machine. The largest value among the distances from the stone column at the positions of the following 1 to 8 was defined as the amount of bending of the polarizing plate.
- FIG. 3 is a graph showing the relationship between the contraction force (X axis) and the bending amount (Y axis) in the bending direction based on the results.
- Example 1 was bent in the direction of the permeation axis under the heat-resistant condition (80 DEG C, 90% humidity and 24 hours), and the remaining Comparative Examples 1 to 3 were bent in the direction of the absorption axis.
- the shrinking force in Example 1 shown in Table 5 is the shrinking force in the transmission axis direction
- the shrinking force in Comparative Examples 1 to 3 is the shrinking force in the absorption axis direction.
- Example 1 was bent in the direction of the permeation axis under the humid heat condition (60 ⁇ ⁇ , humidity 90%, 24 hours), and the remaining Comparative Examples 1 to 3 were bent in the direction of the absorption axis.
- the shrinkage force in Example 1 shown in Table 6 is the shrinkage force in the transmission axis direction
- the shrinkage force in Comparative Examples 1 to 3 is the shrinkage force in the absorption axis direction.
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Abstract
Description
도 3 및 4는 본 명세서의 일 실시상태에서 편광판의 수축력(X축)과 벤딩(Y축)의 상관관계를 분석한 그래프이다. 도 5는 실험예1에서 샘플의 평면도 및 측면도이며, 도 6은 실험예 1에서 벤딩의 정도의 측정을 위한 그림이다.
COP |
편광막 |
TD 연신 COP |
감압접착제층(PSA) |
하드코팅층 |
아크릴 필름 |
편광막 |
COP |
액정코팅층 |
감압접착제층(PSA) |
안티글레어층 |
아크릴 필름 |
편광막 |
아크릴 필름 |
감압접착제층(PSA) |
하드코팅층 |
COP |
편광막 |
COP |
액정코팅층 |
감압접착제층(PSA) |
이때, 벤딩의 정도의 측정은 평평한 석정반에 시료를 놓고(유리기판이 석정반과 맞닿도록 놓음) 도 6과 같이 석정반으로부터 위로 올라온 정도를 하기 1 내지 8의 위치에서 자를 이용해서 측정하거나, 이를 3차원 측정기를 이용하여 측정하였다. 하기 1 내지 8의 위치에서 석정반으로부터 떨어진 거리 중 가장 큰 값을 편광판의 벤딩량으로 정의했다. 이를 바탕으로 벤딩방향의 수축력(X축)과 벤딩량(Y축)의 상관관계를 분석한 그래프는 도 3에 나타내었다.
실시예 1 | 비교예 1 | 비교예 2 | 비교예 3 | |
PSA 반대측 필름 | 5 kgf/mm | 20 kgf/mm | 19 kgf/mm | 6 kgf/mm |
편광막 | 13 kgf/mm | 35 kgf/mm | 35 kgf/mm | 35 kgf/mm |
PSA측 필름 | 5 kgf/mm | 6 kgf/mm | 16 kgf/mm | 6 kgf/mm |
합계(편광판) | 23 kgf/mm | 61 kgf/mm | 70 kgf/mm | 47 kgf/mm |
벤딩량 | 1.3 mm | 5.6 mm | 6.5 mm | 4.6 mm |
유리기판에 부착한 샘플을 60℃, 습도 90%인 chamber에 24 시간 방치한 것을 제외하고, 실험예 1과 동일하다. 그 결과는 하기의 표 6에 나타내었으며, 이를 바탕으로 벤딩방향의 수축력(X축)과 벤딩(Y축)의 상관관계를 분석한 그래프는 도 4에 나타내었다.
실시예 1 | 비교예 1 | 비교예 2 | 비교예 3 | |
PSA 반대측 필름 | 5 kgf/mm | 20 kgf/mm | 19 kgf/mm | 6 kgf/mm |
편광막 | 13 kgf/mm | 35 kgf/mm | 35 kgf/mm | 35 kgf/mm |
PSA측 필름 | 5 kgf/mm | 6 kgf/mm | 16 kgf/mm | 6 kgf/mm |
합계(편광판) | 23 kgf/mm | 61 kgf/mm | 70 kgf/mm | 47 kgf/mm |
벤딩량 | 0.6 mm | 2.4 mm | 3.0 mm | 1.2 mm |
Claims (15)
- 편광막; 및 상기 편광막 상에 구비된 1 이상의 보호필름을 포함하는 편광판으로서,투과축 방향 및 흡수축 방향 중 온도가 25 ℃ 초과이고 상대습도가 50 % 초과인 조건에서 편광판이 더 많이 수축되는 방향으로, 온도가 25 ℃, 상대습도 50%인 조건에서 상기 편광판의 수축력이 폭 1mm 당 39 kgf 이하인 편광판.
- 청구항 1에 있어서, 상기 편광판은 상기 편광막의 일측에 구비된 보호필름; 및 상기 편광막의 타측에 구비된 감압접착제층을 포함하고,투과축 방향 및 흡수축 방향 중 온도가 25 ℃ 초과이고 상대습도가 50 % 초과인 조건에서 편광판이 더 많이 수축되는 방향으로, 온도가 25 ℃, 상대습도 50%인 조건에서 상기 보호필름의 수축력이 폭 1mm 당 13 kgf 이하인 것인 편광판.
- 청구항 1에 있어서, 상기 편광판은 상기 편광막의 일측에 순차적으로 구비된 보호필름 및 휘도향상층; 및 상기 편광막의 타측에 구비된 감압접착제층을 포함하고,투과축 방향 및 흡수축 방향 중 온도가 25 ℃ 초과이고 상대습도가 50 % 초과인 조건에서 편광판이 더 많이 수축되는 방향으로, 온도가 25 ℃, 상대습도 50%인 조건에서 상기 보호필름의 수축력이 폭 1mm 당 7 kgf 이하이고, 상기 휘도향상층 의 수축력이 폭 1mm 당 21 kgf 이하인 것인 편광판.
- 청구항 2에 있어서, 상기 편광판은 상기 편광막과 감압접착제층 사이에 또 하나의 보호필름을 더 포함하고,투과축 방향 및 흡수축 방향 중 온도가 25 ℃ 초과이고 상대습도가 50 % 초과인 조건에서 편광판이 더 많이 수축되는 방향으로, 온도가 25 ℃, 상대습도 50%인 조건에서 상기 또 하나의 보호필름의 수축력이 폭 1mm 당 11 kgf 이하인 것인 편광판.
- 청구항 1에 있어서, 투과축 방향 및 흡수축 방향 중 온도가 25 ℃ 초과이고 상대습도가 50 % 초과인 조건에서 편광판이 더 많이 수축되는 방향으로, 온도가 25 ℃, 상대습도 50%인 조건에서 상기 편광막의 수축력이 폭 1mm 당 15 kgf 이하인 것인 편광판.
- 청구항 1에 있어서, 상기 편광판은 상기 편광막의 일측에 구비되고 80 ℃ 챔버에서 꺼내기 직전을 기준으로 80 ℃ 챔버에서 꺼내고 1시간 뒤의 투과축 방향으로의 수축량이 100 μm 이상인 보호필름을 포함하고,투과축 방향 및 흡수축 방향 중 온도가 25 ℃ 초과이고 상대습도가 50% 초과인 조건에서 어느 한 방향으로, 온도가 25 ℃, 상대습도 50 %인 조건에서 상기 보호필름의 수축력이 폭 1mm 당 13kgf 이하인 것인 편광판.
- 청구항 1에 있어서, 상기 편광판은 상기 편광막의 일측에 구비되고 80 ℃ 챔버에서 꺼내기 직전을 기준으로 80 ℃ 챔버에서 꺼내고 1시간 뒤의 투과축 방향으로의 수축량이 100 μm 이상인 보호필름을 포함하고,투과축 방향 및 흡수축 방향 중 온도가 25 ℃ 초과이고 상대습도가 50% 초과인 조건에서 어느 한 방향으로, 온도가 25 ℃, 상대습도 50 %인 조건에서 상기 편광막의 수축력이 폭 1mm 당 15kgf 이하인 것인 편광판.
- 청구항 1에 있어서, 상기 편광막은 폴리비닐알코올계 편광막인 편광판.
- 청구항 1에 있어서, 상기 보호필름은 각각 COP(cycloolefin polymer)계 필름, 아크릴계 필름, TAC(triacetylcellulose)계 필름, COC(cycloolefin copolymer)계 필름, PNB(polynorbornene)계 필름 및 PET(polyethylene terephtalate)계 필름 중 어느 하나 이상으로 이루어지는 것인 편광판.
- 청구항 1에 있어서, 상기 보호필름은 UV 흡수제, 안티블로킹제(anti-blocking agent), 윤활제, 정전기 방지제 및 안정제 중에서 선택되는 1 이상의 첨가제를 포함하는 것인 편광판.
- 청구항 1에 있어서, 상기 보호필름 상에 반사방지층, 저반사 코팅층, UV 흡수층, 휘도향상층, 정전기 방지 코팅층, 안티글레어(Anti glare)층, 액정코팅층 및 하드코팅층 중에서 선택되는 1 이상의 층이 추가로 구비된 것인 편광판.
- 청구항 1에 있어서, 상기 보호필름은 투습도가 40 g/m2day이하인 것인 편광판.
- 청구항 1에 있어서, 상기 편광막의 두께는 10μm이하인 것인 편광판.
- 청구항 1 내지 13 중 어느 한 항에 따른 편광판을 포함하는 디스플레이 장치.
- 액정셀; 상기 액정셀의 일측에 구비된 청구항 1 내지 13 중 어느 한 항에 따른 편광판을 포함하는 상부 편광판; 및 상기 액정셀의 타측에 구비된 청구항 1 내지 13 중 어느 한 항에 따른 편광판을 포함하는 하부 편광판을 포함하는 액정 표시 장치.
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US14/427,582 US10274646B2 (en) | 2013-06-18 | 2014-06-17 | Polarizing plate and display device comprising same |
JP2015535593A JP2015532459A (ja) | 2013-06-18 | 2014-06-17 | 偏光板およびそれを含むディスプレイ装置 |
CN201480005730.9A CN104937458B (zh) | 2013-06-18 | 2014-06-17 | 偏振板及包含该偏振板的显示装置 |
EP14813142.8A EP2884316A4 (en) | 2013-06-18 | 2014-06-17 | POLARIZING PLATE AND DISPLAY DEVICE COMPRISING THE SAME |
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KR20070091994A (ko) | 2006-03-08 | 2007-09-12 | 주식회사 엘지화학 | 폴리비닐알콜 필름의 제조방법 및 이를 이용하여 제조된폴리비닐알콜 편광필름 |
KR100908184B1 (ko) | 2006-07-31 | 2009-07-16 | 주식회사 엘지화학 | 편광판 및 이를 이용한 액정표시장치 |
JP2009037223A (ja) * | 2007-07-12 | 2009-02-19 | Sumitomo Chemical Co Ltd | 偏光板及び光学部材 |
WO2009054376A1 (ja) * | 2007-10-24 | 2009-04-30 | Nitto Denko Corporation | 偏光板、光学フィルムおよび画像表示装置 |
KR20110097078A (ko) * | 2010-02-24 | 2011-08-31 | 동우 화인켐 주식회사 | 액정표시장치 |
JP5048120B2 (ja) | 2010-03-31 | 2012-10-17 | 住友化学株式会社 | 偏光性積層フィルムの製造方法、および偏光板の製造方法 |
JP5011444B2 (ja) | 2010-09-03 | 2012-08-29 | 日東電工株式会社 | 粘着型光学フィルム、その製造方法および画像表示装置 |
JP6194179B2 (ja) * | 2012-10-04 | 2017-09-06 | 富士フイルム株式会社 | 液晶表示装置 |
JP5990128B2 (ja) * | 2013-05-01 | 2016-09-07 | 富士フイルム株式会社 | 液晶表示装置 |
-
2013
- 2013-06-18 KR KR1020130069822A patent/KR101533883B1/ko active IP Right Grant
-
2014
- 2014-06-17 TW TW103120814A patent/TWI530397B/zh active
- 2014-06-17 EP EP14813142.8A patent/EP2884316A4/en not_active Withdrawn
- 2014-06-17 CN CN201480005730.9A patent/CN104937458B/zh active Active
- 2014-06-17 WO PCT/KR2014/005284 patent/WO2014204165A1/ko active Application Filing
- 2014-06-17 JP JP2015535593A patent/JP2015532459A/ja active Pending
- 2014-06-17 US US14/427,582 patent/US10274646B2/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110244398A (zh) * | 2019-07-12 | 2019-09-17 | 深圳市三利谱光电科技股份有限公司 | 单面设置tac层的偏光片及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
TWI530397B (zh) | 2016-04-21 |
EP2884316A1 (en) | 2015-06-17 |
TW201511957A (zh) | 2015-04-01 |
CN104937458B (zh) | 2017-07-11 |
JP2015532459A (ja) | 2015-11-09 |
KR20140146898A (ko) | 2014-12-29 |
WO2014204165A1 (ko) | 2014-12-24 |
US10274646B2 (en) | 2019-04-30 |
CN104937458A (zh) | 2015-09-23 |
US20150226884A1 (en) | 2015-08-13 |
EP2884316A4 (en) | 2016-03-23 |
KR101533883B1 (ko) | 2015-07-03 |
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