WO2017183499A1 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2017183499A1
WO2017183499A1 PCT/JP2017/014641 JP2017014641W WO2017183499A1 WO 2017183499 A1 WO2017183499 A1 WO 2017183499A1 JP 2017014641 W JP2017014641 W JP 2017014641W WO 2017183499 A1 WO2017183499 A1 WO 2017183499A1
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WIPO (PCT)
Prior art keywords
liquid crystal
display device
polarizer
crystal display
optical compensation
Prior art date
Application number
PCT/JP2017/014641
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English (en)
Japanese (ja)
Inventor
勝則 高田
映子 末房
▲吉▼紹 北村
木村　啓介
梅本　清司
Original Assignee
日東電工株式会社
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.)
Filing date
Publication date
Priority claimed from JP2017030729A external-priority patent/JP2017194672A/ja
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to EP17785839.6A priority Critical patent/EP3447569A4/fr
Priority to KR1020187013354A priority patent/KR20180127305A/ko
Priority to US15/766,084 priority patent/US11079624B2/en
Priority to CN201780004045.8A priority patent/CN108351551A/zh
Publication of WO2017183499A1 publication Critical patent/WO2017183499A1/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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a liquid crystal display device.
  • Liquid crystal display devices are used in a wide range of applications, including televisions, smartphones, personal computer monitors, and digital cameras, and their applications are expanding. As a result, depending on the application of the liquid crystal display device, a configuration in which the liquid crystal display device is embedded in various structures is employed. Specific examples of such applications include operation information screens in railway vehicles (for example, next station guidance display for passenger vehicles), display units such as various instruments and navigation systems arranged on the instrument panel and console of automobiles, There are various instruments in airplane cockpits and monitors installed in hospitals, guard rooms or battle command centers.
  • a cover sheet having a transmissive portion corresponding to the display area of the liquid crystal display device is disposed on the viewing side of the liquid crystal display device as necessary in order to protect and / or design the liquid crystal display device. Can be done.
  • there is a step between the display screen and the outermost surface of the portion in which the liquid crystal display device is embedded for example, the outermost surface of a housing, a wall, a monitor desk, or a cover sheet arranged as necessary.
  • the level difference may affect the visibility depending on the application and / or situation.
  • Patent Document 1 proposes a technique of arranging a neutral density filter on the viewing side.
  • this technique has a problem that the display screen itself becomes dark although the step is difficult to recognize.
  • the present invention has been made to solve the above-described conventional problems, and the object of the present invention is to have a step between the display screen and the outermost surface, and the step is difficult to recognize and has a bright display.
  • An object of the present invention is to provide a liquid crystal display device capable of realizing the above.
  • the liquid crystal display device of the present invention includes a liquid crystal cell; a first polarizer disposed on the back side of the liquid crystal cell; and a position corresponding to the display area of the liquid crystal cell disposed on the viewing side of the liquid crystal cell.
  • the absorption axis direction of the first polarizer and the absorption axis direction of the second polarizer are substantially perpendicular to each other.
  • the liquid crystal display device further includes a first optical compensation layer having Re (550) of 100 nm to 180 nm between the cover sheet and the second polarizer, and A second optical compensation layer having Re (550) of 100 nm to 180 nm is further provided between the cover sheet and the liquid crystal cell.
  • the angle formed by the slow axis direction of the first optical compensation layer and the absorption axis of the second polarizer is 35 ° to 55 ° or 125 ° to 145 °, and The slow axis direction of the first optical compensation layer and the slow axis direction of the second optical compensation layer are substantially perpendicular to each other.
  • the first optical compensation layer and the second optical compensation layer satisfy a relationship of Re (450) ⁇ Re (550).
  • the transmission part of the cover sheet is an opening, and the opening is filled with an adhesive.
  • the adhesive has a refractive index of 1.30 to 1.70.
  • the polarizer on the viewing side is arranged on the viewing side from the step, thereby maintaining the brightness of the display screen, Visibility can be improved by making it difficult to recognize the step.
  • the difficulty of recognizing a step can be further remarkably improved by further arranging so-called ⁇ / 4 plates on both sides of the step.
  • FIG. 1 is a schematic cross-sectional view of a liquid crystal display device according to an embodiment of the present invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another embodiment of this invention. It is a schematic sectional drawing of the liquid crystal display device by another
  • Refractive index (nx, ny, nz) “Nx” is the refractive index in the direction in which the in-plane refractive index is maximum (ie, the slow axis direction), and “ny” is the direction orthogonal to the slow axis in the plane (ie, the fast axis direction). “Nz” is the refractive index in the thickness direction.
  • Refractive index (nx, ny, nz) “Nx” is the refractive index in the direction in which the in-plane refractive index is maximum (ie, the slow axis direction), and “ny” is the direction orthogonal to the slow axis in the plane (ie, the fast axis direction). “Nz” is the refractive index in the thickness direction.
  • In-plane retardation (Re) “Re ( ⁇ )” is an in-plane retardation measured with light having a wavelength of ⁇ nm at 23 ° C.
  • Re (550) is an in-plane retardation measured with light having a wavelength of 550 nm at 23 ° C.
  • Thickness direction retardation (Rth) is a retardation in the thickness direction measured with light having a wavelength of ⁇ nm at 23 ° C.
  • Rth (550) is a retardation in the thickness direction measured with light having a wavelength of 550 nm at 23 ° C.
  • Substantially orthogonal or parallel include the case where the angle between the two directions is 90 ° ⁇ 10 °, preferably 90 ° ⁇ 7 °. And more preferably 90 ° ⁇ 5 °.
  • substantially parallel and “substantially parallel” include the case where the angle between two directions is 0 ° ⁇ 10 °, preferably 0 ° ⁇ 7 °, more preferably 0 ° ⁇ 5 °.
  • orthogonal or “parallel” may include a substantially orthogonal state or a substantially parallel state.
  • A. 1 is a schematic sectional view of a liquid crystal display device according to an embodiment of the present invention.
  • the liquid crystal display device 100 includes a liquid crystal cell 10, a first polarizer 20 disposed on the back side of the liquid crystal cell 10, a cover sheet 40 disposed on the viewing side of the liquid crystal cell 10, and the viewing side of the cover sheet 40. And a second polarizer 60 disposed on the surface.
  • the cover sheet 40 has a transmission part 42 at a position corresponding to the display area of the liquid crystal cell 10.
  • the transmission part includes a physical transmission part (for example, an opening) and an optical transmission part (for example, a transparent part). In the illustrated example, an opening is shown.
  • the second polarizer 60 is disposed so as to cover the transmission part 42 of the cover sheet 40.
  • the second polarizer is disposed on the outermost surface side so as to cover the transmission part of the cover sheet, thereby making it difficult to recognize the step between the outermost surface of the apparatus and the display screen.
  • the visibility of the liquid crystal display device can be improved.
  • the step can be made difficult to recognize due to the transmittance specific to the polarizer, and the polarizer can efficiently transmit polarized light in a predetermined direction, so that the light is reduced overall.
  • the brightness of the display screen can be maintained as compared with the neutral density filter.
  • the transmission part of a cover sheet is an opening part, it can make it difficult to recognize a level
  • “to make it difficult to recognize a level difference” may be referred to as “to reduce a visual level difference”.
  • the absorption axis direction of the first polarizer 20 and the absorption axis direction of the second polarizer 60 are substantially orthogonal or parallel, typically substantially. Are orthogonal.
  • the liquid crystal display device may be in a so-called O mode or in a so-called E mode.
  • the “O-mode liquid crystal display device” refers to a device in which the absorption axis direction of a polarizer disposed on the light source side of the liquid crystal cell and the initial alignment direction of the liquid crystal cell are substantially parallel.
  • the “E mode liquid crystal display device” refers to a device in which the absorption axis direction of a polarizer disposed on the light source side of the liquid crystal cell and the initial alignment direction of the liquid crystal cell are substantially orthogonal to each other.
  • “Initial alignment direction of liquid crystal cell” refers to the direction in which the in-plane refractive index of the liquid crystal layer that is the result of alignment of liquid crystal molecules contained in the liquid crystal layer is maximized in the absence of an electric field (ie, the slow axis direction) Say.
  • FIG. 2 is a schematic cross-sectional view of a liquid crystal display device according to another embodiment of the present invention.
  • the liquid crystal display device 101 further includes a first optical compensation layer 50 between the cover sheet 40 and the second polarizer 60, and a second optical compensation layer between the cover sheet 40 and the liquid crystal cell 10. 70 is further provided.
  • Re (550) is typically 100 nm to 180 nm, preferably 110 nm to 170 nm, more preferably 120 nm to 160 nm.
  • the angle formed between the slow axis direction of the first optical compensation layer 50 and the absorption axis direction of the second polarizer 60 is typically 35 ° to 55 °, preferably 38 ° to 52 °.
  • the angle is typically 125 ° to 145 °, preferably 128 ° to 142 °, more preferably 132 ° to 138 °, and even more preferably about 135 °. If the angle is in such a range, an excellent circular polarization function and antireflection function can be realized by a combination of the first optical compensation layer and the second polarizer. As a result, it is possible to remarkably reduce the visual step while maintaining the brightness of the display screen that is practically acceptable. That is, for example, the visual step can be reduced without reducing the transmittance as compared with the case where the visual step is reduced by reducing the transmittance using a neutral density filter.
  • the first optical compensation layer and the second polarizer may be introduced into the liquid crystal display device as separate members, and the first optical compensation layer and the second optical compensation layer may be introduced.
  • the slow axis direction of the first optical compensation layer 50 and the slow axis direction of the second optical compensation layer 70 are preferably substantially orthogonal.
  • the absorption axis direction of the second polarizer 60 is 0 °
  • the absorption axis direction of the first polarizer 20 is 90 °
  • the slow axis direction of the first optical compensation layer 50 is 45 °.
  • the slow axis direction of the second optical compensation layer 70 may be set to ⁇ 45 °.
  • the constituent materials, optical characteristics, thickness, and the like of the first optical compensation layer and the second optical compensation layer may be the same or different.
  • the first optical compensation layer and the second optical compensation layer each satisfy a relationship of Re (450) ⁇ Re (550).
  • Re (450) ⁇ Re (550)
  • the optical compensation layer satisfies such a relationship, an excellent antireflection function is realized, and as a result, the visual step can be reduced.
  • FIG. 3 is a schematic cross-sectional view of a liquid crystal display device according to still another embodiment of the present invention.
  • the adhesive fills the opening of the cover sheet 40.
  • the pressure-sensitive adhesive may fill only the opening, or may be a part of the pressure-sensitive adhesive layer 80 provided between the cover sheet 40 and the second polarizer 60.
  • the air layer formed by the openings is eliminated, and reflection and / or refraction at the layer interface can be suppressed.
  • the brightness of the display screen can be further improved and the visual level difference can be further significantly reduced.
  • the said transparent part may be comprised with an adhesive.
  • the refractive index of the pressure-sensitive adhesive is preferably 1.30 to 1.70, more preferably 1.40 to 1.60, and still more preferably 1.45 to 1.55.
  • FIG. 5 is a schematic sectional view of a liquid crystal display device according to still another embodiment of the present invention.
  • the cover sheet 40 is curved, and the second polarizer 60 is curved along the cover sheet 40.
  • the cover sheet 40 may be curved in any suitable form. Specifically, the viewing side may be curved so as to be convex, or the viewing side may be curved so as to be concave. Further, any direction in the plane of the cover sheet 40 may be curved as an axis.
  • the liquid crystal cell 10 and the first polarizer 20 may be curved along the cover sheet 40 as in the liquid crystal display device 105 shown in FIG.
  • the liquid crystal display devices 104 and 105 of the present embodiment in which the cover sheet is curved have a wide range of design choices and great commercial value.
  • FIG. 7 is a schematic cross-sectional view of a liquid crystal display device according to still another embodiment of the present invention.
  • the adhesive fills the opening of the cover sheet 40.
  • the pressure-sensitive adhesive may fill only the opening, or may be a part of the pressure-sensitive adhesive layer 80 provided between the cover sheet 40 and the second polarizer 60.
  • the cover sheet 40 is curved, and the pressure-sensitive adhesive fills a gap between the cover sheet 40 and the liquid crystal cell 10 that is generated when the cover sheet 40 is curved. If it is such a structure, the fall of the mechanical strength by the cover sheet 40 curving can be suppressed.
  • FIG. 8 is a schematic cross-sectional view of a liquid crystal display device according to still another embodiment of the present invention.
  • the liquid crystal display device 107 includes a liquid crystal cell 10A, a first polarizer 20A disposed on the back side of the liquid crystal cell 10A, a liquid crystal cell 10B, and a first polarizer 20B disposed on the back side of the liquid crystal cell 10B. And a cover sheet 40 disposed on the viewing side of the liquid crystal cell 10A and the liquid crystal cell 10B, and a second polarizer 60 disposed on the viewing side of the cover sheet 40.
  • the cover sheet 40 of the liquid crystal display device 107 includes a first transmission part 42A at a position corresponding to the display area of the liquid crystal cell 10A, and a second transmission part 42B at a position corresponding to the display area of the liquid crystal cell 10B.
  • the liquid crystal display device 107 has two display screens corresponding to each liquid crystal cell, and arranges the second polarizer on the outermost surface side so as to cover the two transmission portions of the cover sheet, thereby providing the outermost surface of the device. It is difficult to recognize the step between the two display screens and the visibility on the two display screens can be improved.
  • the liquid crystal display device having two display screens and corresponding two liquid crystal cells has been described as an example, the liquid crystal display device of the present invention has three or more display screens and corresponding liquid crystal cells. May be.
  • FIG. 9 is a schematic cross-sectional view of a liquid crystal display device according to still another embodiment of the present invention.
  • the liquid crystal display device 108 of the present embodiment has two display screens as with the liquid crystal display device 107.
  • the cover sheet 40 is bent at a bent portion 90 between the transmissive portion 42A and the transmissive portion 42B, and the second polarizer 60 is bent along the cover sheet 40. Accordingly, the liquid crystal display device 108 can display images in different directions using the two display screens.
  • the cover sheet may have a plurality of bent portions, and may have three or more display screens and corresponding liquid crystal cells sandwiching each bent portion.
  • the liquid crystal display device can be used by being incorporated (typically embedded) in various structures, for example.
  • structures include building structures (e.g., guard room and battle command center walls), railroad vehicles (e.g., walls above doors), automobiles (e.g., instrument panels, consoles), airplanes (e.g., Cockpit), home appliances and AV equipment.
  • the liquid crystal display device further includes a backlight unit (not shown) practically.
  • the backlight unit typically includes a light source and a light guide plate.
  • the backlight unit may further include any appropriate other member (for example, a diffusion sheet, a prism sheet).
  • the liquid crystal display device may further include any appropriate other member.
  • another optical compensation layer (retardation film) may be further disposed.
  • the optical characteristics, number, combination, arrangement position, and the like of another optical compensation layer can be appropriately selected depending on the purpose and desired optical characteristics.
  • various surface treatment layers may be disposed on the outermost surface. Specific examples of the surface treatment layer include an antiglare layer, an antireflection layer, and a hard coat layer.
  • a plurality of surface treatment layers may be disposed. The type, number, combination, and the like of the surface treatment layer can be appropriately selected depending on the purpose.
  • the above embodiments may be combined as appropriate, and the configuration in the above embodiment may be replaced with an optically equivalent configuration.
  • the embodiment of FIG. 2 may be combined with the embodiment of FIG.
  • the liquid crystal display device 103 of FIG. 4 includes a combination of the first optical compensation layer 50 and the second optical compensation layer 70 and an adhesive that fills the opening of the cover sheet.
  • the opening of the cover sheet in the illustrated example may be replaced with a transparent portion.
  • the embodiment of FIG. 6 may be combined with the embodiment of FIG.
  • liquid crystal cell 10 includes a liquid crystal cell 10A and a liquid crystal cell 10B, each configuration is curved, and the cover sheet 40 is first positioned at a position corresponding to the display area of the liquid crystal cell 10A. 42A, and a second transmissive portion 42B is provided at a position corresponding to the display area of the liquid crystal cell 10B.
  • the liquid crystal cell 10 includes a pair of substrates 11 and 11 'and a liquid crystal layer 12 as a display medium sandwiched between the substrates.
  • a color filter and a black matrix are provided on one substrate, a switching element that controls the electro-optical characteristics of the liquid crystal on the other substrate, and a scanning line that supplies a gate signal to the switching element.
  • a signal line for supplying a source signal, a pixel electrode, and a counter electrode are provided.
  • the distance between the substrates (cell gap) is controlled by a spacer or the like.
  • an alignment film made of polyimide can be provided on the side of the substrate in contact with the liquid crystal layer.
  • the liquid crystal layer includes liquid crystal molecules aligned in a homeotropic alignment in the absence of an electric field.
  • “Liquid crystal molecules aligned in homeotropic alignment” means a state in which the alignment vector of the liquid crystal molecules is aligned perpendicularly to the substrate plane as a result of the interaction between the aligned substrate and the liquid crystal molecules. .
  • a typical example of the drive mode using such a liquid crystal layer exhibiting a three-dimensional refractive index is a vertical alignment (VA) mode.
  • the VA mode includes a multi-domain VA (MVA) mode.
  • the liquid crystal layer includes liquid crystal molecules aligned in a homogeneous alignment in the absence of an electric field.
  • “Liquid crystal molecules aligned in a homogeneous arrangement” means a state in which the alignment vector of the liquid crystal molecules is aligned in parallel and uniformly with respect to the substrate plane as a result of the interaction between the aligned substrate and the liquid crystal molecules.
  • Typical examples of drive modes using such a liquid crystal layer exhibiting a three-dimensional refractive index include an in-plane switching (IPS) mode and a fringe field switching (FFS) mode.
  • IPS in-plane switching
  • FFS fringe field switching
  • the IPS mode includes a super-in-plane switching (S-IPS) mode and an advanced super-in-plane switching (AS-IPS) mode using a V-shaped electrode or a zigzag electrode.
  • the FFS mode includes an advanced fringe field switching (A-FFS) mode and an ultra fringe field switching (U-FFS) mode employing a V-shaped electrode or a zigzag electrode.
  • the resin film forming the polarizer may be a single-layer resin film or a laminate of two or more layers.
  • polarizers composed of a single-layer resin film include hydrophilic polymer films such as polyvinyl alcohol (PVA) films, partially formalized PVA films, and ethylene / vinyl acetate copolymer partially saponified films.
  • PVA polyvinyl alcohol
  • polyene-based oriented films such as those subjected to dyeing treatment and stretching treatment with dichroic substances such as iodine and dichroic dyes, PVA dehydrated products and polyvinyl chloride dehydrochlorinated products.
  • a polarizer obtained by dyeing a PVA film with iodine and uniaxially stretching is used because of excellent optical properties.
  • the dyeing with iodine is performed, for example, by immersing a PVA film in an aqueous iodine solution.
  • the stretching ratio of the uniaxial stretching is preferably 3 to 7 times.
  • the stretching may be performed after the dyeing treatment or may be performed while dyeing. Moreover, you may dye
  • the PVA film is subjected to swelling treatment, crosslinking treatment, washing treatment, drying treatment and the like. For example, by immersing the PVA film in water and washing it before dyeing, not only can the surface of the PVA film be cleaned of dirt and anti-blocking agents, but the PVA film can be swollen to cause uneven staining. Can be prevented.
  • the thickness of the polarizer is preferably 1 ⁇ m to 80 ⁇ m, more preferably 10 ⁇ m to 50 ⁇ m, still more preferably 15 ⁇ m to 40 ⁇ m, and particularly preferably 20 ⁇ m to 30 ⁇ m. If the thickness of the polarizer is in such a range, durability under high temperature and high humidity can be excellent.
  • the polarizer preferably exhibits absorption dichroism at any wavelength between 380 nm and 780 nm.
  • the single transmittance of the polarizer is preferably 40.0% to 46.0%, more preferably 41.0% to 44.0%.
  • the polarization degree of the polarizer is preferably 97.0% or more, more preferably 99.0% or more, and further preferably 99.9% or more.
  • Each of the first polarizer 20 and the second polarizer 60 may be provided with a protective layer (not shown) on at least one surface. That is, each of the first polarizer 20 and the second polarizer 60 may be incorporated in a liquid crystal display device as a polarizing plate. The second polarizer 60 may be incorporated in the liquid crystal display device as a circularly polarizing plate as described above.
  • the protective layer is formed of any appropriate film that can be used as a protective layer for the polarizer.
  • the material as the main component of the film include cellulose resins such as triacetyl cellulose (TAC), polyester-based, polyvinyl alcohol-based, polycarbonate-based, polyamide-based, polyimide-based, polyethersulfone-based, and polysulfone-based materials.
  • transparent resins such as polystyrene, polynorbornene, polyolefin, (meth) acryl, and acetate.
  • thermosetting resins such as (meth) acrylic, urethane-based, (meth) acrylurethane-based, epoxy-based, and silicone-based or ultraviolet curable resins are also included.
  • a glassy polymer such as a siloxane polymer is also included.
  • a polymer film described in JP-A-2001-343529 (WO01 / 37007) can also be used.
  • a resin composition containing a thermoplastic resin having a substituted or unsubstituted imide group in the side chain and a thermoplastic resin having a substituted or unsubstituted phenyl group and nitrile group in the side chain for example, a resin composition having an alternating copolymer of isobutene and N-methylmaleimide and an acrylonitrile / styrene copolymer can be mentioned.
  • the polymer film can be, for example, an extruded product of the resin composition.
  • the thickness of the protective layer is typically 5 mm or less, preferably 1 mm or less, more preferably 1 ⁇ m to 500 ⁇ m, and even more preferably 5 ⁇ m to 150 ⁇ m.
  • the thickness of the protective layer is a thickness including the thickness of the surface treatment layer.
  • the inner protective layer is optically isotropic. It is preferable. “Optically isotropic” means that the in-plane retardation Re (550) is 0 nm to 10 nm and the thickness direction retardation Rth (550) is ⁇ 10 nm to +10 nm.
  • the inner protective layer can be composed of any suitable material as long as it is optically isotropic. The material can be appropriately selected from the materials described above with respect to the protective layer, for example.
  • the thickness of the inner protective layer is preferably 5 ⁇ m to 200 ⁇ m, more preferably 10 ⁇ m to 100 ⁇ m, and still more preferably 15 ⁇ m to 95 ⁇ m.
  • the cover sheet 40 may be provided for protection and / or design requirements of the liquid crystal display device when the liquid crystal display device is incorporated into a structure. Therefore, the cover sheet 40 typically has a transmissive portion 42 corresponding to the display area of the liquid crystal cell so as not to hinder the display function of the liquid crystal display device.
  • the transmission part includes a physical transmission part (for example, an opening) and an optical transmission part (for example, a transparent part).
  • the cover sheet can be composed of any suitable material.
  • a typical example of the constituent material is a resin. This is because it has an appropriate strength as a cover sheet and is easy to be molded into a desired shape and to form an opening.
  • Specific examples of the resin include polyarylate, polyamide, polyimide, polyester, polyaryletherketone, polyamideimide, polyesterimide, polyvinyl alcohol, polyfumaric acid ester, polyethersulfone, polysulfone, norbornene resin, polycarbonate resin, cellulose resin and A polyurethane is mentioned. These resins may be used alone or in combination.
  • the cover sheet has light shielding properties in one embodiment.
  • the light shielding property can be imparted by blending a light shielding material (for example, carbon black) with the resin when the cover sheet is formed.
  • a light shielding material for example, carbon black
  • the cover sheet typically has light shielding properties except for the opening.
  • the cover sheet typically has light shielding properties except for the transparent portion. In this case, what is necessary is just to use resin which mix
  • the thickness of the cover sheet is preferably 0.1 mm to 5 mm, more preferably 0.3 mm to 3 mm. If it is such thickness, suitable intensity
  • the first optical compensation layer 50 has an in-plane retardation Re (550) of 100 nm to 180 nm, preferably 110 nm to 170 nm, more preferably 120 nm to 160 nm. . If the in-plane retardation of the first optical compensation layer is within such a range, the slow axis direction of the first optical compensation layer is set to 35 ° with respect to the absorption axis direction of the second polarizer as described above. By setting an angle of ⁇ 55 ° (particularly about 45 °) or 125 ° -145 ° (particularly about 135 °), an excellent circular polarization function and antireflection function can be realized. As a result, the visual level difference can be remarkably reduced while maintaining the brightness of the display screen that is practically acceptable.
  • Re in-plane retardation Re
  • the first optical compensation layer typically shows a relationship in which the refractive index characteristic is nx> ny ⁇ nz or nx> nz> ny.
  • the Nz coefficient of the first optical compensation layer is preferably 0.3 to 2.0, more preferably 0.5 to 1.5, and still more preferably 0.5 to 1.3. By satisfying such a relationship, more excellent antireflection characteristics can be achieved.
  • the first optical compensation layer may exhibit a reverse dispersion wavelength characteristic in which the retardation value increases according to the wavelength of the measurement light, and has a positive chromatic dispersion characteristic in which the retardation value decreases according to the wavelength of the measurement light. It may also be possible to show a flat chromatic dispersion characteristic in which the phase difference value hardly changes depending on the wavelength of the measurement light.
  • the first optical compensation layer preferably exhibits reverse dispersion wavelength characteristics. By exhibiting such characteristics, an antireflection function can be realized over a predetermined wavelength band by only using a combination of the first optical compensation layer and the second polarizer without further using a so-called ⁇ / 2 plate.
  • the in-plane retardation of the first optical compensation layer satisfies the relationship of Re (450) ⁇ Re (550).
  • Re (450) / Re (550) is preferably 0.8 or more and less than 1, and more preferably 0.8 or more and 0.95 or less.
  • the in-plane retardation of the first optical compensation layer preferably satisfies the relationship Re (550) ⁇ Re (650).
  • Re (550) / Re (650) is preferably 0.8 or more and less than 1, and more preferably 0.8 or more and 0.95 or less.
  • the first optical compensation layer is typically a retardation film formed of any appropriate resin capable of realizing the above characteristics.
  • the resin that forms the retardation film include polyarylate, polyamide, polyimide, polyester, polyaryletherketone, polyamideimide, polyesterimide, polyvinyl alcohol, polyfumaric acid ester, polyethersulfone, polysulfone, and norbornene resin.
  • a polycarbonate resin, a cellulose resin, and a polyurethane are mentioned. These resins may be used alone or in combination. Polyarylate, norbornene resin or polycarbonate resin is preferable.
  • the polyarylate is preferably represented by the following formula (I).
  • a and B each represent a substituent, which is a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group, and A and B are the same or different. Also good. a and b represent the corresponding numbers of substitutions of A and B, and are integers of 1 to 4, respectively.
  • D is a covalent bond, CH 2 group, C (CH 3 ) 2 group, C (CZ 3 ) 2 group (where Z is a halogen atom), CO group, O atom, S atom, SO 2 group, Si (CH 2 CH 3 ) 2 groups and N (CH 3 ) groups.
  • R1 is a linear or branched alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group.
  • R2 is a linear or branched alkyl group having 2 to 10 carbon atoms, or a substituted or unsubstituted aryl group.
  • R3, R4, R5 and R6 are each independently a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms, and R3, R4, R5 and R6 may be the same or different.
  • p1 is an integer of 0 to 3
  • p2 is an integer of 1 to 3
  • n is an integer of 2 or more.
  • the norbornene-based resin is a resin that is polymerized using a norbornene-based monomer as a polymerization unit.
  • Examples of the norbornene-based monomer include norbornene and alkyl and / or alkylidene substituted products thereof such as 5-methyl-2-norbornene, 5-dimethyl-2-norbornene, 5-ethyl-2-norbornene, and 5-butyl.
  • polar group-substituted products such as halogens; dicyclopentadiene, 2,3-dihydrodicyclopentadiene, etc .; dimethanooctahydronaphthalene, its alkyl and / or alkylidene Substituents and polar group substituents such as halogen such as 6-methyl-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6- Ethyl-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-oct Hydronaphthalene, 6-ethylidene-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6-chloro-1,4: 5,8-dimethan
  • the polycarbonate resin any appropriate polycarbonate resin can be used as long as the effects of the present invention can be obtained.
  • the polycarbonate resin includes a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, an alicyclic diol, an alicyclic dimethanol, di, tri, or polyethylene glycol, and an alkylene.
  • the polycarbonate resin is derived from a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, a structural unit derived from an alicyclic dimethanol and / or a di-, tri- or polyethylene glycol. More preferably, a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, and a structural unit derived from di, tri, or polyethylene glycol.
  • the polycarbonate resin may contain structural units derived from other dihydroxy compounds as necessary. Details of the polycarbonate resin that can be suitably used in the present invention are described in, for example, Japanese Patent Application Laid-Open Nos. 2014-10291 and 2014-26266, and the description is incorporated herein by reference. The
  • the glass transition temperature of the polycarbonate resin is preferably 110 ° C. or higher and 180 ° C. or lower, more preferably 120 ° C. or higher and 165 ° C. or lower. If the glass transition temperature is excessively low, the heat resistance tends to deteriorate, there is a possibility of causing a dimensional change after film formation, and the image quality of the obtained liquid crystal display device may be lowered. If the glass transition temperature is excessively high, the molding stability at the time of film molding may deteriorate, and the transparency of the film may be impaired.
  • the glass transition temperature is determined according to JIS K 7121 (1987).
  • the molecular weight of the polycarbonate resin can be represented by a reduced viscosity.
  • the reduced viscosity is measured using a Ubbelohde viscometer at a temperature of 20.0 ° C. ⁇ 0.1 ° C., using methylene chloride as a solvent, precisely adjusting the polycarbonate concentration to 0.6 g / dL.
  • the lower limit of the reduced viscosity is usually preferably 0.30 dL / g, more preferably 0.35 dL / g or more.
  • the upper limit of the reduced viscosity is usually preferably 1.20 dL / g, more preferably 1.00 dL / g, still more preferably 0.80 dL / g.
  • the reduced viscosity is less than the lower limit, there may be a problem that the mechanical strength of the molded product is reduced.
  • the reduced viscosity is larger than the upper limit, the fluidity at the time of molding is lowered, and there may be a problem that productivity and moldability are lowered.
  • the retardation film is typically produced by stretching a resin film in at least one direction.
  • any appropriate method can be adopted as a method for forming the resin film.
  • a melt extrusion method for example, a T-die molding method
  • a cast coating method for example, a casting method
  • a calendar molding method for example, a hot press method, a co-extrusion method, a co-melting method, a multilayer extrusion method, an inflation molding method, etc. It is done.
  • a T-die molding method, a casting method, and an inflation molding method are used.
  • the thickness of the resin film can be set to any appropriate value depending on desired optical characteristics, stretching conditions described later, and the like.
  • the thickness is preferably 50 ⁇ m to 300 ⁇ m.
  • Any appropriate stretching method and stretching conditions may be employed for the stretching.
  • various stretching methods such as free end stretching, fixed end stretching, free end contraction, and fixed end contraction can be used singly or simultaneously or sequentially.
  • the stretching direction can also be performed in various directions and dimensions such as a horizontal direction, a vertical direction, a thickness direction, and a diagonal direction.
  • the stretching temperature is preferably Tg-30 ° C. to Tg + 60 ° C., more preferably Tg-10 ° C. to Tg + 50 ° C. with respect to the glass transition temperature (Tg) of the resin film.
  • a retardation film having the desired optical characteristics (for example, refractive index characteristics, in-plane retardation, Nz coefficient) can be obtained by appropriately selecting the stretching method and stretching conditions.
  • the retardation film is produced by continuously stretching a long resin film obliquely in the direction of an angle ⁇ with respect to the longitudinal direction.
  • a long stretched film having an orientation angle of ⁇ with respect to the longitudinal direction of the film (slow axis in the direction of angle ⁇ ) can be obtained.
  • the angle ⁇ is equal to the absorption axis of the second polarizer and the first optical compensation layer. It may be an angle formed with the slow axis.
  • Examples of the stretching machine used for the oblique stretching include a tenter type stretching machine capable of adding feed forces, pulling forces, or pulling forces at different speeds in the lateral and / or longitudinal directions.
  • the tenter type stretching machine includes a horizontal uniaxial stretching machine, a simultaneous biaxial stretching machine, and the like, but any suitable stretching machine can be used as long as a long resin film can be continuously stretched obliquely.
  • the thickness of the retardation film is preferably 20 ⁇ m to 100 ⁇ m, more preferably 20 ⁇ m to 80 ⁇ m, and further preferably 20 ⁇ m to 65 ⁇ m. With such a thickness, the desired in-plane retardation and Nz coefficient can be obtained.
  • Second Optical Compensation Layer Optical characteristics, constituent materials, thicknesses, and the like of the second optical compensation layer are as described in the above section E for the first optical compensation layer.
  • the second optical compensation layer may be the same as or different from the first optical compensation layer.
  • the first optical compensation layer may be a laminate of the first optical compensation layer and a so-called ⁇ / 2 plate.
  • the second optical compensation layer may be a laminate of the second optical compensation layer and a ⁇ / 2 plate.
  • the ⁇ / 2 plate preferably exhibits a relationship in which the refractive index characteristic is nx> ny ⁇ nz.
  • the in-plane retardation Re (550) of the ⁇ / 2 plate is preferably 190 nm to 360 nm, and more preferably 220 nm to 330 nm.
  • the relationship between the slow axis of the ⁇ / 2 plate and the slow axis of the first optical compensation layer or the slow axis of the second optical compensation layer is as follows. It is preferable to adjust the angle formed with the slow axis of the optical compensation layer or the second optical compensation layer to be appropriate. For example, when the slow axis of the ⁇ / 2 plate is positioned clockwise (0 ° to + 180 °) with respect to the absorption axis of the second polarizer, the axis of the slow axis of the first optical compensation layer The angle is preferably + 40 ° to + 50 °, more preferably + 43 ° to + 47 °, and further preferably + 45 ° with respect to the polarization direction after passing through the ⁇ / 2 plate.
  • the slow axis of the first optical compensation layer Is preferably ⁇ 40 ° to ⁇ 50 °, more preferably ⁇ 43 ° to ⁇ 47 °, and still more preferably ⁇ 45 with respect to the polarization direction after passing through the ⁇ / 2 plate. °.
  • + x ° means that x ° is clockwise with respect to the reference direction
  • ⁇ x ° is that x ° is counterclockwise with respect to the reference direction.
  • the ⁇ / 2 plate is typically a stretched film of a resin film, similar to the first optical compensation layer and the second optical compensation layer.
  • transmission part of the cover sheet 40 is an opening part, and the said opening part is filled with the adhesive.
  • the refractive index of the pressure-sensitive adhesive is preferably 1.30 to 1.70, more preferably 1.40 to 1.60, and still more preferably 1.45 to 1.55.
  • the difference between the refractive index of the pressure-sensitive adhesive and the refractive index of the layer adjacent to the pressure-sensitive adhesive is preferably 0.20 or less, more preferably 0 to 0.15.
  • the adhesive may fill only the opening, and is provided between the cover sheet 40 and the second polarizer 60 (or the first optical compensation layer 50 if present).
  • a part of the pressure-sensitive adhesive layer 80 may be used.
  • the thickness of the pressure-sensitive adhesive layer (thickness other than the portion corresponding to the opening of the cover sheet) can be appropriately set according to the purpose, adhesive force, and the like.
  • the thickness of the pressure-sensitive adhesive layer is preferably 1 ⁇ m to 500 ⁇ m, more preferably 1 ⁇ m to 200 ⁇ m, and still more preferably 1 ⁇ m to 100 ⁇ m.
  • the pressure-sensitive adhesive layer can be composed of any appropriate pressure-sensitive adhesive having the above characteristics.
  • pressure sensitive adhesives based on acrylic polymers, silicone polymers, polyesters, polyurethanes, polyamides, polyethers, fluorine polymers, rubber polymers, and the like.
  • it is an adhesive (acrylic adhesive) having an acrylic polymer as a base polymer. It is because it is excellent in excellent optical transparency, moderate pressure-sensitive adhesive properties (wetting properties, cohesiveness and adhesiveness), and excellent weather resistance and heat resistance.
  • the present invention will be specifically described by way of examples, but the present invention is not limited to these examples.
  • the measuring method of each characteristic is as follows.
  • step difference About the liquid crystal display device obtained by the Example and the comparative example, the presence or absence of the unevenness
  • Visual step The step was visually confirmed in a state where an image was actually displayed on the liquid crystal display devices obtained in Examples and Comparative Examples. Evaluation was made according to the following criteria.
  • C The level difference in which the visual recognition of the image is uncomfortable.
  • D The level difference is clearly recognized so as to greatly affect the visual recognition of the image.
  • Example 1 (I) Polarizing plate Two commercially available polarizing plates (manufactured by Nitto Denko Corporation, product name “CWQ1463VCUHC”) were prepared and used as a first polarizing plate (polarizer) and a second polarizing plate (polarizer).
  • Example 2 Example 1 except that a first optical compensation layer is further provided between the second polarizer and the cover sheet, and a second optical compensation layer is further provided between the cover sheet and the liquid crystal cell.
  • a liquid crystal display device was produced. Specifically, two retardation films prepared as described below were used as the first optical compensation layer and the second optical compensation layer.
  • the angle formed by the slow axis of the first optical compensation layer and the absorption axis of the second polarizer is 45 °, and the slow axis of the first optical compensation layer and the second axis
  • the optical compensation layer was bonded so that the slow axis thereof was substantially orthogonal.
  • the obtained liquid crystal display device was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • a retardation film was obtained by a method according to Example 1 of JP-A-2014-26266.
  • Re (550) of the obtained retardation film was 147 nm, the Nz coefficient was 1.0, Re (450) / Re (550) was 0.89, and the thickness was 40 ⁇ m.
  • Example 3 A liquid crystal display device was produced in the same manner as in Example 1 except that the opening of the cover sheet was filled with the adhesive. The obtained liquid crystal display device was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Example 4 A liquid crystal display device was produced in the same manner as in Example 2 except that the opening of the cover sheet was filled with the adhesive. The obtained liquid crystal display device was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Example 1 A liquid crystal display device was produced in the same manner as in Example 1 except that the second polarizer was disposed between the cover sheet and the liquid crystal cell, that is, the cover sheet was the outermost layer. The obtained liquid crystal display device was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Comparative Example 2 Liquid crystal as in Comparative Example 1, except that a commercially available neutral density filter (product name “Neutral Density Filter ND-0.5”, transmittance 36%, manufactured by FUJIFILM Corporation) was further provided on the viewing side of the cover sheet. A display device was produced. The obtained liquid crystal display device was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • a commercially available neutral density filter product name “Neutral Density Filter ND-0.5”, transmittance 36%, manufactured by FUJIFILM Corporation
  • Example 3 A liquid crystal display device was produced in the same manner as in Comparative Example 1 except that a third polarizer was further provided on the viewing side of the cover sheet. Note that the same polarizer as the first polarizer (polarizer) and the second polarizer (polarizer) was used as the third polarizer (polarizer). Further, the third polarizer was bonded so that the absorption axis thereof was substantially parallel to the absorption axis of the second polarizer. The obtained liquid crystal display device was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • the liquid crystal display device of the example of the present invention was excellent in the balance between the visual step and the brightness of the display screen, while eliminating the physical step.
  • the liquid crystal display device of Comparative Example 1 in which the cover sheet is the outermost layer on the viewing side, although the display screen is bright, the physical level difference is not eliminated, and the visual level difference is poor enough to affect the visibility. .
  • the liquid crystal display device of Comparative Example 2 using the neutral density filter although the physical level difference is eliminated, both the brightness of the display screen and the visual level difference are poor, and the brightness of the display screen is particularly poor. there were.
  • the liquid crystal display device of Comparative Example 3 in which a polarizer was further provided between the cover sheet and the liquid crystal cell the brightness of the display screen was poor. Further, as is apparent from a comparison between Example 1 and Example 3 and Example 2 and Example 4, it can be seen that the brightness can be further improved by filling the opening with an adhesive.
  • the liquid crystal display device of the present invention includes portable information terminals (PDAs), mobile phones, watches, digital cameras, portable game devices such as portable game machines, OA devices such as personal computer monitors, notebook computers, copy machines, video cameras, liquid crystal televisions, Home appliances such as microwave ovens and AV equipment, back monitors, monitors for car navigation systems, in-vehicle devices such as car audio, display equipment such as information monitors for commercial stores, security equipment such as monitoring monitors, nursing care It can be used for various applications such as nursing care and medical equipment such as monitors and medical monitors.
  • the liquid crystal display device of the present invention can be suitably used in a form embedded in a structure.

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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)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)

Abstract

L'invention concerne un dispositif d'affichage à cristaux liquides, lequel présente un espace en forme de gradin entre la surface d'affichage et la surface supérieure, cet espace en forme de gradin étant peu visible, et lequel permet d'obtenir un affichage lumineux. Le dispositif d'affichage à cristaux liquides selon l'invention comporte: une cellule à cristaux liquides; un premier polariseur situé côté face arrière de la cellule à cristaux liquides; une feuille protectrice située côté reconnaissance visuelle de la cellule à cristaux liquides et possédant une partie de pénétration dans un emplacement face à une région d'affichage de la cellule à cristaux liquides; et un deuxième polariseur situé de façon à recouvrir la partie de pénétration côté reconnaissance visuelle de la feuille protectrice. La direction d'axe d'absorption du premier polariseur et la direction d'axe d'absorption du deuxième polariseur sont sensiblement perpendiculaires.
PCT/JP2017/014641 2016-04-18 2017-04-10 Dispositif d'affichage à cristaux liquides WO2017183499A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17785839.6A EP3447569A4 (fr) 2016-04-18 2017-04-10 Dispositif d'affichage à cristaux liquides
KR1020187013354A KR20180127305A (ko) 2016-04-18 2017-04-10 액정 표시 장치
US15/766,084 US11079624B2 (en) 2016-04-18 2017-04-10 Liquid crystal display apparatus
CN201780004045.8A CN108351551A (zh) 2016-04-18 2017-04-10 液晶显示装置

Applications Claiming Priority (4)

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JP2016-083234 2016-04-18
JP2016083234 2016-04-18
JP2017030729A JP2017194672A (ja) 2016-04-18 2017-02-22 液晶表示装置
JP2017-030729 2017-02-22

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001037007A1 (fr) 1999-11-12 2001-05-25 Kaneka Corporation Film transparent
JP2001343529A (ja) 2000-03-30 2001-12-14 Kanegafuchi Chem Ind Co Ltd 偏光子保護フィルムおよびその製造方法
JP2010079087A (ja) * 2008-09-26 2010-04-08 Casio Computer Co Ltd 表示部を備えた電子機器
JP2011127072A (ja) * 2009-12-21 2011-06-30 Casio Computer Co Ltd 板状部品の接合方法及び接合部材
JP2012047895A (ja) * 2010-08-25 2012-03-08 Sharp Corp 液晶表示装置及びテレビ受像装置
JP2014010291A (ja) 2012-06-29 2014-01-20 Nitto Denko Corp 円偏光板および表示装置
JP2014026266A (ja) 2012-06-21 2014-02-06 Nitto Denko Corp 偏光板および有機ｅｌパネル
JP5877433B2 (ja) 2012-07-09 2016-03-08 ビステオン グローバル テクノロジーズ インコーポレイテッド ディスプレイユニット

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001037007A1 (fr) 1999-11-12 2001-05-25 Kaneka Corporation Film transparent
JP2001343529A (ja) 2000-03-30 2001-12-14 Kanegafuchi Chem Ind Co Ltd 偏光子保護フィルムおよびその製造方法
JP2010079087A (ja) * 2008-09-26 2010-04-08 Casio Computer Co Ltd 表示部を備えた電子機器
JP2011127072A (ja) * 2009-12-21 2011-06-30 Casio Computer Co Ltd 板状部品の接合方法及び接合部材
JP2012047895A (ja) * 2010-08-25 2012-03-08 Sharp Corp 液晶表示装置及びテレビ受像装置
JP2014026266A (ja) 2012-06-21 2014-02-06 Nitto Denko Corp 偏光板および有機ｅｌパネル
JP2014010291A (ja) 2012-06-29 2014-01-20 Nitto Denko Corp 円偏光板および表示装置
JP5877433B2 (ja) 2012-07-09 2016-03-08 ビステオン グローバル テクノロジーズ インコーポレイテッド ディスプレイユニット

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