WO2015046969A1 - Plaque polarisante munie d'une zone de dépolarisation locale et son procédé de fabrication - Google Patents

Plaque polarisante munie d'une zone de dépolarisation locale et son procédé de fabrication Download PDF

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Publication number
WO2015046969A1
WO2015046969A1 PCT/KR2014/009053 KR2014009053W WO2015046969A1 WO 2015046969 A1 WO2015046969 A1 WO 2015046969A1 KR 2014009053 W KR2014009053 W KR 2014009053W WO 2015046969 A1 WO2015046969 A1 WO 2015046969A1
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WIPO (PCT)
Prior art keywords
polarizing plate
polarization
light
iodine
irradiating
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PCT/KR2014/009053
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English (en)
Korean (ko)
Inventor
이병선
남성현
나균일
Original Assignee
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from KR20140126249A external-priority patent/KR20150037550A/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2016531556A priority Critical patent/JP6441339B2/ja
Priority to US14/911,216 priority patent/US10081141B2/en
Priority to CN201480027906.0A priority patent/CN105229500B/zh
Publication of WO2015046969A1 publication Critical patent/WO2015046969A1/fr

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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
    • 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
    • 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

Definitions

  • the present invention relates to a polarizing plate and a method of manufacturing the same, and more particularly, to a polarizing plate having a polarization canceling area locally so as to be suitable for mounting components such as a camera module.
  • Polarizing plates are applied to various image display device devices such as liquid crystal display devices and organic light emitting display devices.
  • polarizing plates are dyed iodine and / or dichroic dye on a polyvinyl alcohol (hereinafter, referred to as PVA) -based film, crosslinking the iodine and / or dichroic dye using boric acid, etc. It is used in the form which laminated
  • image display apparatuses have recently become slimmer, and have been developed to minimize the thickness of bezels and edges on which a screen is not displayed to realize a large screen.
  • various functions such as a camera and a video call are generally installed in a small and medium-sized display device, a notebook, and a PC, which emphasizes portability and mobility.
  • components such as a camera are mounted on the image display device. Attempts have been made to provide various colors to product logos or border areas in consideration of design elements.
  • the polarizing plate is dark black because it is dyed with iodine and / or dichroic dye in the entire area of the polarizing plate. As a result, it is difficult to impart various colors to the image display device. When positioned, problems such as absorbing more than 50% of the amount of light in the polarizing plate is lowered the visibility of the camera lens.
  • the physical method as described above degrades the appearance of the image display apparatus and may damage the polarizing plate due to the nature of the punching process.
  • a problem in which the polarizing plate is torn in the process of physically removing the polarizing plate may occur, and this problem is further exacerbated by the recent trend of thinning of the polarizing plate.
  • the perforated portion of the polarizing plate should be formed in an area sufficiently far from the corner.
  • the bezel part of the image display device is relatively widened. NARROW BEZEL's narrow bezel design trend is also a problem.
  • the camera module is mounted on the perforated portion of the polarizing plate as described above, the camera lens is exposed to the outside, and thus there is a problem that contamination and damage of the camera lens are likely to occur when used for a long time.
  • the latter chemical removal method has a problem that it is difficult to control the polarization resolution region due to the difficulty of desorption of accurate iodine to the polarizer of the desired site due to the diffusion of the chemical used, it is difficult to apply in the state of the polarizing plate bonded the protective film .
  • the present invention is to solve the above problems, as a polarizing plate and a method of manufacturing the polarized light is removed in some areas, as in the prior art without physically punching or using chemicals, does not harm the appearance, even with a simple process
  • the purpose is to enable polarization removal.
  • the present invention includes a polyvinyl alcohol-based polarizer to which any one or more of iodine and dichroic dyes are dyed, and resolves polarized light having a single transmittance of 70% or more in the wavelength range of 400 nm to 800 nm.
  • a polarizing plate having an area is provided.
  • the polarization cancellation area of the polarizing plate has a polarization degree of 20% or less, the region excluding the polarization removal area has a single transmittance of 40% to 45%, and a polarization degree of 99% or more.
  • the present invention provides a display panel; And a polarizing plate attached to one side or both sides of the display panel, wherein the polarizing plate comprises a polyvinyl alcohol polarizer in which at least one of iodine and dichroic dye is dyed, and is 400 nm to Provided is an image display device having a polarization canceling area having a single transmittance of 70% or more in the 800 nm wavelength range.
  • the camera module may be positioned in the polarization cancellation area.
  • the present invention is to resolve the polarization by irradiating light of a specific wavelength selected from a wavelength range of 200nm to 800nm to a portion of the polarizing member including a polyvinyl alcohol-based polarizer to which any one or more of iodine and dichroic dyes are dyed It provides a polarizing plate manufacturing method comprising a.
  • the step of irradiating the polarized light by irradiating the light is preferably performed at an intensity of 0.1 to 20W / cm 2 for 1 to 1000 seconds.
  • the step of irradiating the polarized light by irradiating the light may use a light emitting diode (LED) lamp or a laser lamp.
  • LED light emitting diode
  • a polarizing plate having a single transmittance of 70% or more in the 400 nm to 800 nm wavelength range can be produced.
  • FIG. 1 is a graph showing changes in the single transmittance (Ts), the orthogonal transmittance (Tc), and the polarization (DOP) values according to the irradiation time when a laser of 532 nm wavelength is irradiated with a laser having a wavelength of 2 W / cm 2 .
  • FIG. 2 is a graph showing changes in the single transmittance (Ts), the orthogonal transmittance (Tc), and the polarization (DOP) values according to the irradiation time when the polarizer is irradiated with a laser of 266 nm wavelength at an intensity of 0.6 W / cm 2 .
  • Ts single transmittance
  • Tc orthogonal transmittance
  • DOP polarization
  • the inventors of the present invention by irradiating a portion of the polarizing member including a polyvinyl alcohol-based polarizer in which iodine and / or dichroic dyes are dyed, light of a specific wavelength in the ultraviolet or visible light region, without applying a punching or chemical method
  • the present invention has been completed by finding that a polarizing plate having a polarization canceling area having a single transmittance of 70% or more can be produced locally.
  • the polarizing plate according to the present invention comprises a polyvinyl alcohol polarizer in which at least one of iodine and a dichroic dye is dyed, and has a polarization canceling area having a single transmittance of 70% or more in the wavelength range of 400 nm to 800 nm. It is done.
  • the polarization cancellation area of the polarizing plate as will be described below, a specific wavelength selected from a wavelength range of 200nm to 800nm in a partial region of the polarizing member including a polyvinyl alcohol-based polarizer salted with iodine and / or dichroic dye refers to the area formed by irradiating light.
  • the polarization cancellation region is 70% or more, and more preferably 80% or more in the single transmittance in the wavelength range of 400nm to 800nm which is a visible light region. Moreover, it is more preferable that the said polarization cancellation area
  • the polarization elimination region removes all of the polarizers oriented, so that polarization of all wavelength bands is eliminated, but in the case of the polarizing plate of the present invention, the wavelength of 400 nm to 800 nm There is a characteristic difference in that polarization is resolved only in a range.
  • This is suitable for the present invention for improving only the visibility of the area where the camera module is to be placed, while maintaining the characteristics of the polarizing plate, and the role of blocking light in the ultraviolet area can be maintained, so that the ultraviolet light in the camera module or other application modules can be maintained. It has the advantage of protecting sensitive materials.
  • the region excluding the polarization canceling region of the polarizing plate preferably has a single transmittance of 40% to 45%, more preferably 42% to 45%. Furthermore, it is preferable that the polarization degree of the area
  • the area of the polarization canceling area may vary depending on the size of the image display device and / or the polarizing plate or the size of the camera module and / or the product logo. More specifically, the area is not limited thereto. 0.005% to 40% with respect to the area of the polarizing plate It is desirable to occupy.
  • the polarization elimination region is not particularly limited in shape or position thereof, and may be formed in various forms and positions.
  • the polarization canceling area may be formed to correspond to the shape of the part at a location where a component such as a camera is mounted, or may be formed in the shape of a product logo in an area where a product logo is printed, and a polarizing member.
  • the color is to be given to the edge portion of the polarizing member may be formed in a frame shape.
  • the polarization canceling region of the polarizing plate the light of a specific wavelength selected from a wavelength range of 200nm to 800nm in a partial region of the polarizing member including a polyvinyl alcohol-based polarizer in which at least one of iodine and dichroic dye is dyed. It is generated through the step of solving the polarization by irradiating, will be described below the polarizing plate manufacturing method of the present invention.
  • the polarizing member may be a polyvinyl alcohol polarizer in which iodine and / or dichroic dye is prepared by the method described below, or a polarizing plate having a protective film attached to at least one surface of the polarizer. Since the polarizer is very thin in thickness, it is common to form a polarizing plate by attaching a protective film on one side or both sides of the polarizer to protect the polarizer, and the protective film is attached to both sides of the polarizing element to protect the polarizer.
  • acetate-based, polyester-based, polyethersulfone-based, polycarbonate-based, polyamide-based, polyimide-based, and polyolefin-based resin films such as TriAcetyl Cellulose (TAC) may be used. It is not limited to this.
  • the protective film may be laminated using an adhesive, but the adhesive may be a polyvinyl alcohol-based water-based adhesive, but is not limited thereto.
  • the polarizing plate may additionally include a functional film such as a wide viewing angle compensation film or a brightness enhancement film in addition to the protective film for further function enhancement.
  • the wavelength band of the region where the polarizing member including the polyvinyl alcohol-based polarizer in which iodine and / or dichroic dye is dyed can absorb light is known as an ultraviolet or visible light range such as 380 nm to 800 nm. Accordingly, when the light source having the same wavelength as the wavelength band is irradiated to the polarizing member, vibration-electron excitation of iodine or dichroic dye absorbing the light in the wavelength band existing in the polarizer is induced. By the molecular vibration movement, molecules of iodine or dichroic dye are transferred from an electronic ground state to an electronic excited state.
  • the polarization function is solved in the region of 380 nm to 800 nm, which is the visible light region of the polarizing plate, thereby increasing the overall transmittance.
  • the salted iodine is present in various forms such as KI 5, KI 3, I 2 and KI.
  • Each iodine absorbs light in a different wavelength range, and when irradiated with light corresponding to a wavelength range of 200 to 800 nm, the iodine is decomposed into KI or I (single molecule), as shown in the following Chemical Formulas 1 and 2. Since I absorbs light in a short wavelength region of about 200 nm, as the decomposition of iodine proceeds as described below, the light transmittance of a wavelength in the visible light region is increased.
  • the irradiation may use ultraviolet light or visible light having a specific wavelength selected from the wavelength range of 200nm to 800nm, more preferably can be irradiated with light in the range of 400nm to 750nm. Since the electrons of iodine are transferred to the excited state of the electrons, decomposition of chemical bonds is caused by a strong vibrational motion accompanied by heat, so that light in the wavelength region that iodine can absorb can be irradiated. However, more preferably, the decomposition may be more easily performed in the 400 nm to 750 nm region in which iodine absorbs more light (wavelength region having a large extinction coefficient).
  • the step of removing the polarized light by irradiating the light is preferably carried out with an intensity of 0.1W / cm 2 to 20W / cm 2 , more preferably, 1W / cm 2 to 5W / cm 2 irradiation And, depending on the irradiation intensity can be irradiated with light for about 1 second to 1000 seconds, preferably 10 seconds to 250 seconds or so.
  • the step of eliminating polarization by irradiating the light may vary the irradiation intensity and time according to the type of polarizing member.
  • irradiating light to the polarizer for 200 seconds to 1000 seconds at an intensity of 0.1 W / cm 2 to 1 W / cm 2 , more preferably for 500 seconds to 900 seconds at a 0.5 W / cm 2 to 0.8 W / cm 2 intensity You can investigate.
  • the intensity of, and more preferably for 5 seconds to 30 seconds the intensity of 1W / cm 2 to 3W / cm 2 desirable.
  • a polarizer since it is weak compared with a polarizing plate, it needs to irradiate for a long time using low laser intensity.
  • FIG. 1 shows graphs of changes in the single transmittance (Ts), the orthogonal transmittance (Tc), and the polarization (DOP) values according to the irradiation time when the laser having a wavelength of 532 nm is irradiated with a laser of 532 nm at 2 W / cm 2 .
  • Ts single transmittance
  • Tc orthogonal transmittance
  • DOP polarization
  • FIG. 2 discloses a result obtained by irradiating a polarizer with a laser of 266 nm wavelength at an intensity of 0.6 W / cm 2.
  • the transmittance value increases and the polarization degree decreases. It can be seen that.
  • the step of irradiating light to solve the polarization may be irradiated to the polarizing member, that is, the polarizer or the polarizing plate by using a masking method, a light emitting diode (LED) lamp or a laser lamp, the light emitting diode ( It is more preferred to use LED) lamps or laser lamps.
  • LED light emitting diode
  • the light emitting diode (LED) lamp or the laser lamp due to the straightness of the light, it is possible to form a polarization cancellation area by accurately targeting (locally) at a desired position, easy to adjust the size and very small polarization resolution Regions can be formed.
  • the polarization direction of the light source should coincide with the absorption axis direction of the polarizing plate to observe more effective increase in transmittance and decrease in polarization degree, and also prevent power loss consumed by the light source. If the polarization direction of the light source coincides with the direction of the absorption axis of the polarizer, the incident angle of the light source incident on the polarizer is irrelevant.
  • the effect of the polarization cancellation becomes remarkably low.
  • the method used in the Examples was irradiated with light of 532nm using Coherent's Verdi laser, and irradiated to the polarizing plate at a distance of 40cm in front of the focal length using an optical lens.
  • the polarization of the light source was 100: 1 or more, the laser was used to oscillate vertically predominantly, the absorption axis of the polarizing plate and the polarization of the light source was irradiated within 5 degrees.
  • the polarizing plate caused localized polarization cancellation and transmittance increase of 1 cm in diameter.
  • the polyvinyl alcohol polarizer to which the iodine and / or the dichroic dye is used may be used, without limitation, polyvinyl alcohol polarizers well known in the art, for example, polyvinyl Through a dyeing step of dyeing an alcohol-based polymer film with iodine and / or a dichroic dye, a crosslinking step of crosslinking the polyvinyl alcohol-based film with a dye, and a drawing step of stretching the polyvinyl alcohol-based film It may be a polyvinyl alcohol-based polarizer prepared.
  • the dyeing step is to dye the iodine molecules or dyes having a dichroic to the polyvinyl alcohol film, the iodine molecules or dye molecules absorb the light oscillating in the stretching direction of the polarizing plate, the light oscillating in the vertical direction By passing through it, it is possible to obtain polarized light having a specific vibration direction.
  • dyeing may be performed by impregnating the polyvinyl alcohol-based film in a treatment bath containing a solution containing a dichroic substance such as an iodine solution.
  • water is generally used as the solvent used in the solution of the dyeing step, but an appropriate amount of an organic solvent having compatibility with water may be added.
  • dichroic substances such as iodine may be used in an amount of 0.06 parts by weight to 0.25 parts by weight with respect to 100 parts by weight of a solvent. This is because, when the dichroic material such as iodine is in the above range, the transmittance of the polarizer manufactured after stretching can satisfy the range of 42.0% to 47.0%.
  • auxiliary agent such as an iodide compound in order to improve the dyeing efficiency
  • the auxiliary agent in a ratio of 0.3 parts by weight to 2.5 parts by weight with respect to 100 parts by weight of the solvent.
  • the reason for adding an auxiliary agent such as the iodide compound is to increase the solubility of iodine in water because the solubility in water is low in the case of iodine.
  • the mixing ratio of the iodine and the iodide compound is preferably 1: 5 to 1:10.
  • iodide compound that may be added in the present invention, potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, barium iodide, calcium iodide, tin iodide, titanium iodide or these And mixtures thereof, but is not limited thereto.
  • the temperature of the treatment bath may be maintained at about 25 °C to 40 °C, the reason is that the dyeing efficiency may be lowered at a lower temperature of less than 25 °C, iodine sublimation at too high temperature above 40 °C This can increase the use of iodine.
  • the time for immersing the polyvinyl alcohol-based film in the treatment bath may be about 30 seconds to 120 seconds, because, when the immersion time is less than 30 seconds, the dyeing may not be uniformly made to the polyvinyl alcohol-based film. If it exceeds 120 seconds, the dyeing is saturated and there is no need for further dipping.
  • a deposition method performed by immersing a polyvinyl alcohol-based film in boric acid aqueous solution or the like is generally used, but may be performed by a coating method or a spraying method for spraying a solution on the film.
  • the iodine molecule or the dichroic dye molecule when the iodine molecule or the dichroic dye molecule is dyed to the polyvinyl alcohol-based film by the dyeing step, the iodine molecule or the dye molecule using a crosslinking agent is polyvinyl alcohol-based It is made to adsorb
  • the solvent used in the solution of the crosslinking bath is generally used water, an appropriate amount of an organic solvent having compatibility with water may be added, the crosslinking agent is 0.5 parts by weight to 5.0 parts by weight based on 100 parts by weight of the solvent May be added in portions.
  • the crosslinking agent is contained in less than 0.5 parts by weight, the strength of the polyvinyl alcohol-based film may drop in the water due to lack of crosslinking in the polyvinyl alcohol-based film, when exceeding 5.0 parts by weight, excessive crosslinking is formed It is possible to reduce the stretchability of the polyvinyl alcohol-based film.
  • boron compounds such as boric acid and borax, glyoxal, glutaraldehyde, etc. are mentioned, These can be used individually or in combination.
  • the temperature of the cross-linking bath depends on the amount and the stretching ratio of the cross-linking agent, but is not limited to this, it is generally preferred that the 45 °C to 60 °C.
  • the temperature of the crosslinking bath is controlled at high temperature conditions in order to improve the mobility of the polyvinyl alcohol-based film chains. Adjust the temperature.
  • the temperature of the crosslinking bath since the stretching process is 5 times or more, the temperature of the crosslinking bath must be maintained at 45 ° C. or higher to improve the stretchability of the polyvinyl alcohol-based film.
  • the time for immersing the polyvinyl alcohol-based film in the crosslinking bath is preferably about 30 seconds to 120 seconds.
  • the reason for this is that when the immersion time is less than 30 seconds, the crosslinking may not be uniformly performed on the polyvinyl alcohol-based film, and when the immersion time is longer than 120 seconds, the crosslinking is saturated and there is no need for further immersion. .
  • stretching in the stretching step refers to stretching the film uniaxially to orient the polymer of the film in a certain direction.
  • the stretching method can be divided into wet stretching method and dry stretching method, and dry stretching method is again an inter-roll stretching method, a heating roll stretching method, a compression stretching method, a tenter stretching method, or the like.
  • the wet stretching method is classified into a tenter stretching method, an inter-roll stretching method, and the like.
  • the stretching step it is preferable to stretch the polyvinyl alcohol-based film at a stretching ratio of 4 to 7 times, preferably at a stretching temperature of 45 ° C to 60 ° C. Because, in order to impart polarization performance to the polyvinyl alcohol-based film, it is necessary to orient the chain of the polyvinyl alcohol-based film, the chain orientation may not sufficiently occur at a draw ratio of less than 4 times, polyvinyl at a draw ratio of more than 7 times This is because the alcohol-based film chain can be cut.
  • the stretching temperature may vary depending on the content of the crosslinking agent, at a temperature of less than 45 °C polyvinyl alcohol-based film chain fluidity may be lowered, the stretching efficiency may be reduced, if the temperature exceeds 60 °C, polyvinyl alcohol This is because the system film may be softened and the strength may be weakened.
  • the stretching step may be carried out simultaneously or separately with the dyeing step or crosslinking step.
  • the deposition step is carried out in an iodine solution, and if it is carried out simultaneously with the crosslinking step, it is preferably carried out in an aqueous solution of boric acid.
  • the polarizing plate of the present invention as described above is attached to one side or both sides of the display panel can be usefully applied to the image display device.
  • the display panel may be a liquid crystal panel, a plasma panel, and an organic light emitting panel.
  • the image display device may include a liquid crystal display (LCD), a plasma display panel (PDP), and an organic light emitting display device.
  • the display device may be an organic light emitting diode (OLED).
  • the image display device may be a liquid crystal display device including a liquid crystal panel and polarizing plates provided on both surfaces of the liquid crystal panel, wherein at least one of the polarizing plates may be a polarizing plate according to the present invention.
  • the polarizing plate includes a polyvinyl alcohol polarizer in which any one or more of iodine and dichroic dye is dyed, and has a polarization solving area having a single transmittance of 70% or more.
  • the type of liquid crystal panel included in the liquid crystal display device is not particularly limited.
  • a panel of a passive matrix type such as, but not limited to, a twisted nematic (TN) type, a super twisted nematic (STN) type, a ferrolectic (F) type, or a polymer dispersed (PD) type; Active matrix panels such as two-terminal or three-terminal; All known panels, such as an In Plane Switching (IPS) panel and a Vertical Alignment (VA) panel, can be applied.
  • IPS In Plane Switching
  • VA Vertical Alignment
  • other configurations constituting the liquid crystal display device for example, types of upper and lower substrates (eg, color filter substrates or array substrates) are not particularly limited, and configurations known in the art may be employed without limitation. Can be.
  • the image display device of the present invention may include, but is not limited to, other components such as a camera module, and other components such as the camera module may be located in the polarization canceling area.
  • other components such as a camera module
  • the camera module may be located in the polarization canceling area.
  • a dyeing process was performed for 60 seconds in a 0.2 wt% concentration and a 25 ° C. iodine solution. Then, after 30 seconds in a 1 wt% boric acid, 45 °C solution, the washing process was carried out a 6-fold stretching process in a solution of boric acid 2.5wt%, 52 °C. After stretching, a polarizer having a thickness of 12 ⁇ m was prepared by performing a complementary color process in a 5 wt% KI solution and drying in an oven at 60 ° C. for 5 minutes.
  • the polarizer prepared was placed on both sides of the PVA polarizer 40 ⁇ m triacetyl cellulose (TAC) film, laminated with a laminator through a PVA-based water-soluble adhesive and dried for 5 minutes in an 80 °C oven TAC / A polarizing plate having a PVA / TAC structure was prepared.
  • TAC triacetyl cellulose
  • the polarizing plates prepared in Example 1 and Comparative Examples 1 and 2 were cut to a size of 40 mm ⁇ 40 mm, and the specimen was fixed to a measuring holder, followed by an ultraviolet visible spectrometer (V-7100, manufactured by JASCO).
  • the initial optical properties, that is, the single transmittance and the polarization degree were measured. In particular, the values at 550 nm are shown in Table 1.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)

Abstract

La présente invention concerne une plaque polarisante munie d'une zone de dépolarisation et un procédé de fabrication de celle-ci. La plaque polarisante comprend un polariseur à base d'alcool polyvinylique coloré à l'iode et/ou avec un colorant dichroïque. Une perméabilité de groupe de la zone de dépolarisation locale est égale à 70 % dans une plage de longueurs d'onde de 400 nm à 800 nm. Le procédé comprend l'irradiation d'une portion de la plaque polarisante avec une lumière possédant une longueur d'onde spécifique sélectionnée dans une plage de longueurs d'onde de 200 nm à 800 nm.
PCT/KR2014/009053 2013-09-30 2014-09-26 Plaque polarisante munie d'une zone de dépolarisation locale et son procédé de fabrication WO2015046969A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2016531556A JP6441339B2 (ja) 2013-09-30 2014-09-26 局地的に偏光解消領域を有する偏光板およびその製造方法
US14/911,216 US10081141B2 (en) 2013-09-30 2014-09-26 Polarizing plate having local depolarization area and method for manufacturing same
CN201480027906.0A CN105229500B (zh) 2013-09-30 2014-09-26 局部具有去偏光区域的偏光板及其制备方法

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20130117011 2013-09-30
KR10-2013-0117011 2013-09-30
KR20140126249A KR20150037550A (ko) 2013-09-30 2014-09-23 국지적으로 편광 해소 영역을 갖는 편광판 및 그 제조 방법
KR10-2014-0126249 2014-09-23

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Cited By (8)

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JP2017187664A (ja) * 2016-04-07 2017-10-12 株式会社東海理化電機製作所 表示装置、表示板の製造方法
KR20170137722A (ko) * 2015-04-17 2017-12-13 닛토덴코 가부시키가이샤 편광자, 편광판 및 편광자의 제조 방법
US10215901B2 (en) * 2015-11-04 2019-02-26 Nitto Denko Corporation Polarizer, polarizing plate, and method of producing polarizer
US10234611B2 (en) 2015-09-28 2019-03-19 Nitto Denko Corporation Polarizer, polarizing plate, and image display apparatus
US10754072B2 (en) 2014-06-27 2020-08-25 Nitto Denko Corporation Polarizer having non-polarization portions, a long polarizing plate and image display device comprising the polarizer
US10782462B2 (en) 2014-04-25 2020-09-22 Nitto Denko Corporation Polarizer, polarizing plate, and image display apparatus
US11061176B2 (en) 2014-04-25 2021-07-13 Nitto Denko Corporation Polarizer, polarizing plate, and image display apparatus
US11467328B2 (en) 2015-06-25 2022-10-11 Nitto Denko Corporation Polarizer having non-polarizing part

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