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WO2019078190A1 - Appareil d'affichage tête haute - Google Patents

Appareil d'affichage tête haute Download PDF

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Publication number
WO2019078190A1
WO2019078190A1 PCT/JP2018/038447 JP2018038447W WO2019078190A1 WO 2019078190 A1 WO2019078190 A1 WO 2019078190A1 JP 2018038447 W JP2018038447 W JP 2018038447W WO 2019078190 A1 WO2019078190 A1 WO 2019078190A1
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WO
WIPO (PCT)
Prior art keywords
group
polarizer
cover member
head
retardation layer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/038447
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English (en)
Japanese (ja)
Inventor
岳仁 淵田
祥明 麻野井
勝則 高田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Denko Corp
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 JP2018194388A external-priority patent/JP7309264B2/ja
Application filed by Nitto Denko Corp filed Critical Nitto Denko Corp
Priority to CN201880067705.1A priority Critical patent/CN111226158B/zh
Priority to KR1020257016172A priority patent/KR20250079038A/ko
Priority to EP18868428.6A priority patent/EP3699669A4/fr
Priority to US16/756,931 priority patent/US11966050B2/en
Priority to KR1020207010414A priority patent/KR20200074106A/ko
Publication of WO2019078190A1 publication Critical patent/WO2019078190A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays

Definitions

  • the present invention relates to a head-up display device.
  • a head-up display device In the head-up display device, a cover member that covers the opening of the optical path is provided in order to prevent foreign matter such as dust into the housing in which the optical system is accommodated. Furthermore, in order to prevent the temperature rise in the housing (specifically, in order to prevent the incidence of sunlight), a polarizing plate may be attached to the cover member (for example, Patent Document 1).
  • Such a head-up display device has a problem that when the driver wears polarized sunglasses, the visibility is significantly reduced (in the worst case, it is blacked out).
  • the conventional head-up display device has a problem that the heat resistance is insufficient.
  • the present invention has been made to solve the above-mentioned conventional problems, and its object is to provide a head-up display device excellent in visibility when viewed through polarized sunglasses and excellent in heat resistance. To provide.
  • a head-up display device has a display for emitting projection light, at least one reflector for reflecting the projection light, and an opening, and the display and the reflector are accommodated therein.
  • a cover member for covering the opening; and a polarizing plate provided with a retardation layer provided on an inner side of the cover member and including a retardation layer and a polarizer in this order from the cover member side;
  • the in-plane retardation Re (550) of the retardation layer is 3000 nm or more, and in the head-up display device of the present invention, the reflection angle of the projection light emitted from the housing through the opening is 30%. It is configured to be less than or equal to 40 °.
  • the polarizer includes an aromatic disazo compound represented by Formula (1) described later.
  • the cover member comprises a polycarbonate resin.
  • the thickness of the cover member is 10 ⁇ m to 1000 ⁇ m. In one embodiment, the thickness of the polarizer is 100 nm to 1000 nm.
  • a polarizing plate with a retardation layer including a retardation layer with ultrahigh retardation is laminated on the inside of the cover member covering the opening of the housing, and By setting the reflection angle of the projection light emitted from the housing through the opening to the windshield in a predetermined range, the visibility when viewed through polarized sunglasses is excellent, and the heat resistance is excellent.
  • a head-up display device can be realized.
  • FIG. 7 is a partial schematic cross-sectional view illustrating a head-up display device according to another embodiment of the present invention. It is a schematic sectional drawing explaining an example of the polarizing plate with a retardation layer which can be used for the head-up display apparatus of this invention. It is the schematic explaining the relationship of the projection light and windshield in the head-up display apparatus of this invention.
  • FIG. 1 is a partial schematic cross-sectional view for explaining a head-up display device according to an embodiment of the present invention.
  • the head-up display device 100 has a display 10 for emitting projection light; at least one reflector (one reflector in the illustrated example) 20 for reflecting the projection light; and an opening 32 and a display A housing 30 for housing the container 10 and the reflector 20 therein; a cover member 40 for covering the opening 32; and a polarizing plate 50 with a retardation layer provided on the inside of the housing of the cover member 40.
  • one reflector 20 is provided in the embodiment of FIG. 1, two reflectors 20, 22 may be provided as in the head-up display device 101 shown in FIG.
  • a liquid crystal display device is mentioned as a representative example of a display. Since the liquid crystal display device includes a polarizer, projection light emitted from the liquid crystal display device is linearly polarized light.
  • the reflector 20 has, for example, a mirror portion and a mirror holder for holding the mirror portion at a predetermined position of the housing 30.
  • the mirror portion may be a plane mirror or a concave mirror.
  • a concave mirror is employed.
  • the projected image can be enlarged and displayed.
  • the radius of curvature of the concave mirror can be appropriately set according to the purpose, the size of the image to be projected, and the like.
  • the reflector 22 may be, for example, a flat mirror (cold mirror) that transmits only infrared light and reflects visible light and ultraviolet light.
  • the housing 30 is a box-like member having an internal space capable of housing the display 10 and the reflectors 20 and 22.
  • the housing 30 typically has an opening 32, and projection light emitted from the display 10 through the opening 32 is emitted to the outside of the housing 30.
  • Housing 30 may be comprised of any suitable material.
  • a material which is difficult to heat up by irradiation of sunlight and is easy to form can be mentioned. Specific examples of such materials include acrylic resins, epoxy resins, polyester resins, urethane resins, polyolefin resins, fluorine resins, and phenoxy resins.
  • the housing 30 may be incorporated in part of a car or may be a member independent of the car. For example, a dashboard of a car may be used as the housing.
  • the cover member 40 is a plate-like member that covers the opening 32 of the housing 30 so that dust does not enter the inside of the housing 30.
  • the cover member 40 is typically transparent, and projection light reflected from the reflector 20 is transmitted through the cover member 40 and emitted to the outside of the housing 30. Details of the cover member will be described later in Section B.
  • the retardation layer-attached polarizing plate 50 is bonded to the inside of the cover member 40 via the adhesive.
  • the retardation layer-attached polarizing plate 50 includes, in order from the cover member 40 side, a retardation layer 52, a polarizer 54, and a base material 56 as needed.
  • the in-plane retardation Re (550) of the retardation layer 52 is 3000 nm or more. If the in-plane retardation of the retardation layer is extremely large like this, even if the retardation changes depending on the viewing angle, the retardation of the entire retardation layer is very large, so the influence on the visibility is reduced. be able to. As a result, it is possible to realize excellent visibility when viewed through polarized sunglasses.
  • Re ( ⁇ ) is an in-plane retardation of a film measured with light of wavelength ⁇ nm at 23 ° C. Therefore, “Re (550)” is the in-plane retardation of the film measured with light of wavelength 550 nm at 23 ° C.
  • Re (nx ⁇ ny) ⁇ d, where d (nm) is the thickness of the film.
  • nx is the refractive index in the direction in which the in-plane refractive index is maximized (ie, the slow axis direction)
  • ny is the direction orthogonal to the in-plane slow axis (ie, the phase advance Axial refractive index).
  • the direction of the absorption axis of the retardation layer-attached polarizing plate 50 is typically set to a direction substantially orthogonal to the polarization direction of the projection light (typically, linearly polarized light).
  • the expressions “substantially orthogonal” and “substantially orthogonal” include cases where the angle formed by two directions is 90 ° ⁇ 7 °, preferably 90 ° ⁇ 5 °, and more preferably Is 90 ° ⁇ 3 °.
  • the expressions “substantially parallel” and “substantially parallel” include cases where the angle formed by the two directions is 0 ° ⁇ 7 °, preferably 0 ° ⁇ 5 °, more preferably 0 ° ⁇ . It is 3 degrees.
  • orthogonal or substantially parallel states when simply referred to herein as “orthogonal” or “parallel”, it is intended to include substantially orthogonal or substantially parallel states.
  • the reflection angle ⁇ of the projection light emitted from the housing 30 through the opening 32 to the windshield 60 is 30 ° or less or 40 ° or more. ing.
  • the reflection angle ⁇ is preferably 2 ° to 25 ° or 45 ° to 89 °, more preferably 5 ° to 20 ° or 55 ° to 85 °.
  • the reflection angle ⁇ can be controlled by adjusting the angle of the reflector 20.
  • the mirror holder may be configured to be adjustable in angle.
  • the mirror holder has, for example, an axis whose circumferential surface is connected to the back surface of the mirror, and a controller connected to the end of the axis. Since the angle of the mirror unit changes in accordance with the rotation of the shaft, the control unit can indirectly adjust the angle of the mirror unit by controlling the rotation of the shaft.
  • the angle of the mirror may typically be adjusted according to the shape of the windshield. As is clear from FIG. 4, the reflection angle and the incident angle have the same value.
  • the head-up display device will not be described because any suitable configuration commonly used in the industry is adopted.
  • the cover member and the polarizing plate with a retardation layer will be specifically described.
  • the cover member 40 is typically transparent, as described above.
  • “transparent” means having the property of transmitting visible light with a wavelength of 360 nm to 830 nm. Transparent substantially does not absorb visible light and transmits light of all wavelengths in the visible light range (colorless and transparent), and absorbs light of a part of wavelengths in the visible light range, and its wavelengths Other cases of light transmission (colored transparent) are included.
  • the cover member 40 is preferably colorless and transparent.
  • the total light transmittance of the cover member is preferably 50% or more, more preferably 70% or more, and still more preferably 90% or more. The total light transmittance is a value measured according to JIS K7375.
  • the surface shape of the cover member can be designed appropriately according to the shape of the opening 32.
  • the portion covering the opening may be formed only of a plane or a curved surface, and the portion covering the opening may be formed of a plurality of planes and / or a plurality of curved surfaces.
  • the surface shape of the cover member is composed of only a flat surface or only a curved surface.
  • the cover member by which the part which covers an opening part was comprised only by the curved surface is used.
  • the thickness of the cover member may be, for example, 10 ⁇ m to 1000 ⁇ m. If the cover member is too thick, the transmittance of the projection light may be reduced (the light loss of the projection light may be increased), which may contribute to the generation of a double image. If the cover member is too thin, the mechanical strength may be insufficient and the covering function may be insufficient.
  • the cover member may be composed of any suitable transparent material. Typical examples include resin and glass. Specific examples of the resin include: ester-based resins such as polyethylene terephthalate and polyethylene naphthalate; cellulose-based resins such as diacetyl cellulose and triacetyl cellulose; polycarbonate-based resins such as bisphenol A-based polycarbonate; acrylic resins such as polymethyl methacrylate Acrylic resins such as lactone-modified acrylic resin; styrene resins such as polystyrene and acrylonitrile / styrene copolymer; polyethylene, polypropylene, olefin resins having cyclic structure or norbornene structure, and olefin resin such as ethylene / propylene copolymer Vinyl-based resins; amide-based resins such as aromatic polyamides; imide-based resins; sulfone-based resins; polyethersulfone-based resins; Rensurufido resin
  • Polarizing plate with retardation layer C-1 Polarizer Any appropriate polarizer may be employed as the polarizer. Representative examples include iodine-based polarizers and lyotropic liquid crystal polarizers.
  • the resin film forming the iodine-based polarizer may be a single-layer resin film, or may be produced using a laminate of two or more layers.
  • the polarizer composed of a single-layer resin film examples include polyvinyl alcohol (PVA) based resin film, partially formalized PVA based resin film, ethylene / vinyl acetate copolymer based partially saponified film, etc.
  • PVA polyvinyl alcohol
  • a polarizer obtained by dyeing a PVA-based resin film with iodine and uniaxially stretching it is used because of excellent optical properties.
  • staining by the said iodine is performed by immersing a PVA-type resin film in iodine aqueous solution, for example.
  • the stretching ratio of the uniaxial stretching is preferably 3 to 7 times. Stretching may be carried out after the dyeing process or may be carried out while dyeing. Moreover, it may be dyed after being drawn.
  • the PVA resin film is subjected to swelling treatment, crosslinking treatment, washing treatment, drying treatment, and the like. For example, by immersing and washing the PVA-based resin film in water prior to dyeing, it is possible not only to clean the stains and antiblocking agents on the surface of the PVA-based resin film, but also to swell the PVA-based resin film and dye it. Unevenness can be prevented.
  • the polarizer obtained by using a laminate a laminate of a resin substrate and a PVA-based resin layer (PVA-based resin film) laminated on the resin substrate, or a resin substrate and the resin
  • coated-formed to the base material is mentioned.
  • coated and formed by the said resin base material applies a PVA-type resin solution to a resin base material, for example, it is made to dry, and a resin base material Forming a PVA-based resin layer thereon to obtain a laminate of the resin base and the PVA-based resin layer; stretching and dyeing the laminate to make the PVA-based resin layer as a polarizer; obtain.
  • stretching typically includes dipping the laminate in a boric acid aqueous solution and stretching.
  • stretching may optionally further comprise air-stretching the laminate at a high temperature (eg, 95 ° C. or higher) prior to stretching in an aqueous boric acid solution.
  • the resulting laminate of resin substrate / polarizer may be used as it is (that is, the resin substrate may be used as a protective layer of polarizer), and the resin substrate is peeled off from the laminate of resin substrate / polarizer.
  • any appropriate protective layer depending on the purpose may be laminated on the peeled surface.
  • the details of the method for producing such a polarizer are described, for example, in JP-A-2012-73580. The publication is incorporated herein by reference in its entirety.
  • the lyotropic liquid crystal polarizer is excellent in heat resistance, and as a result, the heat resistance of the head-up display device can be further improved.
  • the lyotropic liquid crystal polarizer includes, for example, an aromatic disazo compound represented by the following formula (1):
  • Q 1 represents a substituted or unsubstituted aryl group
  • Q 2 represents a substituted or unsubstituted arylene group
  • R 1 each independently represents a hydrogen atom, a substituted or unsubstituted group
  • R represents an alkyl group, substituted or unsubstituted acetyl group, substituted or unsubstituted benzoyl group, substituted or unsubstituted phenyl group
  • M represents a counter ion
  • m is an integer of 0 to 2
  • n is 0
  • at least one of m and n is not 0, 1 ⁇ m + n ⁇ 6, and when m is 2, each R 1 may be the same or
  • Each of OH, (NHR 1 ) m and (SO 3 M) n shown in Formula (1) may be bonded to any of seven substitution sites on the naphthyl ring.
  • the naphthyl group and the azo group are bonded at the 1- or 2-position of the naphthyl group.
  • R 1 is preferably a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted acetyl group, more preferably a hydrogen atom.
  • the substituted or unsubstituted alkyl group includes a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.
  • M (counter ion) of the formula (1) is preferably a hydrogen ion; an alkali metal ion such as Li, Na, K or Cs; an alkaline earth metal ion such as Ca, Sr or Ba; other metal ions; And ammonium ions optionally substituted by a group or a hydroxyalkyl group; salts of organic amines and the like.
  • metal ions include Ni + , Fe 3 + , Cu 2 + , Ag 2 + , Zn 2 + , Al 3 + , Pd 2 + , Cd 2 + , Sn 2 + , Co 2 + , Mn 2 + , Ce 3 + .
  • Examples of the organic amine include alkylamines having 1 to 6 carbon atoms, alkylamines having 1 to 6 carbon atoms having a hydroxyl group, and alkylamines having 1 to 6 carbon atoms having a carboxyl group.
  • each M may be the same or different.
  • M of SO 3 M is a divalent or higher cation, it can be combined with SO 3 ⁇ of another adjacent azo compound to form a supramolecular assembly.
  • M in the formula (1) is preferably 1. Further, n in the general formula (1) is preferably 1 or 2.
  • naphthyl group of the formula (1) include those represented by the following formulas (a) to (1).
  • R 1 and M in formulas (a) to (1) are as described for formula (1).
  • the aryl group represented by Q 1 in the formula (1) includes, in addition to a phenyl group, a fused ring group in which two or more benzene rings such as a naphthyl group are condensed.
  • the arylene group represented by Q 2 includes, in addition to a phenylene group, a fused ring group in which two or more benzene rings such as a naphthylene group are fused.
  • the aryl group of Q 1 or the arylene group of Q 2 may or may not have a substituent.
  • the aromatic disazo compound of the formula (1) having a polar group is excellent in solubility in an aqueous solvent, regardless of whether the aryl group or the arylene group is substituted or unsubstituted.
  • substituents include an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkylamino group having 1 to 6 carbon atoms, and Amino group, C 1 to C 6 acylamino group, C 1 to C 6 hydroxyalkyl group such as dihydroxypropyl group, carboxyl group such as COOM group, SO 3 M group etc. sulfonic acid group, hydroxyl group, cyano group, nitro Groups, amino groups, halogeno groups and the like.
  • the substituent is one selected from an alkoxy group having 1 to 6 carbon atoms, a hydroxyalkyl group having 1 to 6 carbon atoms, a carboxyl group, a sulfonic acid group, and a nitro group.
  • the aromatic disazo compound which has such a substituent is especially excellent in water solubility.
  • the aryl group or arylene group may be substituted by one of these substituents, or may be substituted by two or more. Also, the substituents may be substituted in any ratio.
  • Q 1 in the formula (1) is preferably a substituted or unsubstituted phenyl group, more preferably a phenyl group having the above-mentioned substituent.
  • Q 2 is preferably a substituted or unsubstituted naphthylene group, more preferably a naphthylene group having the above-described substituent, and particularly preferably a 1,4-naphthylene group having the above-described substituent.
  • An aromatic disazo compound in which Q 1 in the formula (1) is a substituted or unsubstituted phenyl group and Q 2 is a substituted or unsubstituted 1,4-naphthylene group is represented by the following formula (2): Ru.
  • R 1 , M, m and n are as described for Formula (1) above.
  • a and B represent a substituent, and a and b represent the substitution number.
  • a and B are each independently an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkylamino group having 1 to 6 carbon atoms, a phenylamino group, an acylamino group having 1 to 6 carbon atoms And a hydroxyalkyl group having 1 to 6 carbon atoms such as a dihydroxypropyl group, a carboxyl group such as a COOM group, a sulfonic acid group such as an SO 3 M group, a hydroxyl group, a cyano group, a nitro group, an amino group and a halogeno group.
  • a is an integer of 0 to 5
  • b is an integer of 0 to 4. However, at least one of a and b is not zero.
  • the substituents A may be the same or different.
  • the substituents B may be the same or different.
  • aromatic disazo compounds represented by the following formula (3) are preferable.
  • the OH group of the naphthyl group is bonded to the position (ortho position) adjacent to the azo group.
  • R 1 , M, m and n are as described for Formula (1), and A is as described for Formula (2).
  • p represents an integer of 0 to 4. p is preferably 1 or 2, more preferably 1.
  • the aromatic disazo compounds represented by the above formulas (1) to (3) can be produced, for example, by Toyo Hosoda "Theoretical manufacture dye chemistry (5th edition)" (July 15, 1947, published by Jichihodo, pages 135 to 152). Can be synthesized according to For example, after the aromatic disazo compound of the formula (3) is subjected to diazotization and coupling reaction of an aniline derivative and a naphthalenesulfonic acid derivative to obtain a monoazo compound, this monoazo compound is diazotized and further 1-amino- It can be synthesized by coupling reaction with an 8-naphthol sulfonic acid derivative.
  • the lyotropic liquid crystal polarizer can be produced, for example, by a method including the following step B and step C.
  • the step A may be performed before the step B, and the step D may be performed after the step C.
  • Step A a step of subjecting the surface of the substrate to an orientation treatment.
  • Step B A step of applying a coating solution containing the aromatic disazo compound represented by the above formula (1) on the surface of a substrate to form a coating.
  • Step C A step of drying the coated film to form a polarizer which is a dried coated film.
  • Process D A process of subjecting the surface of the polarizer obtained in Process C to a water resistance treatment.
  • Step A is a step of applying an orientation regulating force to the surface of the substrate by performing an orientation process on the surface of the substrate.
  • the process A For example, (a) a method of rubbing the surface of the substrate, (b) a film of polyimide or the like is formed on the surface of the film, and the surface of the film is rubbed to form an alignment film. (C) A film made of a photoreactive compound is formed on the surface of the film, and the film is irradiated with light to form an alignment film.
  • the polarizing plate with a retardation layer which has an orientation film between a base material and a polarizer is produced.
  • the substrate may be used as it is (in this case, the substrate may function as a protective layer of a polarizer), and the substrate may be peeled off to provide any appropriate protective film on the peeled surface.
  • Process B is a process of forming a coating film using a coating liquid.
  • the coating liquid contains the above-mentioned aromatic disazo compound and a solvent for dissolving or dispersing the aromatic disazo compound.
  • the coating liquid is obtained by dissolving or dispersing the aromatic disazo compound in a solvent.
  • any suitable solvent can be used as a solvent for dissolving or dispersing the aromatic disazo compound.
  • Aqueous solvents are preferred.
  • the aqueous solvent include water, a hydrophilic solvent, and a mixed solvent of water and a hydrophilic solvent.
  • the hydrophilic solvent is a solvent which dissolves substantially uniformly in water.
  • hydrophilic solvents include alcohols such as methanol and isopropyl alcohol; glycols such as ethylene glycol; cellosolves such as methyl cellosolve and ethyl cellosolve; ketones such as acetone and methyl ethyl ketone; esters such as ethyl acetate; It can be mentioned.
  • the aqueous solvent preferably, water or a mixed solvent of water and a hydrophilic solvent is used.
  • the aromatic disazo compound represented by the above formula (1) is an organic compound having lyotropic liquid crystallinity. Therefore, the coating liquid exhibits a lyotropic liquid crystal phase by changing the liquid temperature, the concentration of the aromatic disazo compound, and the like.
  • the lyotropic liquid crystal phase is generated by the formation of a supramolecular association in the liquid by the aromatic disazo compound.
  • the lyotropic liquid crystal phase can be identified and identified by the optical pattern observed with a polarizing microscope.
  • the supramolecular association is one large complex formed by bonding a plurality of aromatic disazo compounds by hydrogen bond or the like.
  • the concentration of the aromatic disazo compound in the coating solution is preferably adjusted to exhibit a liquid crystal phase.
  • the concentration of the aromatic disazo compound in the coating solution is usually 0.05% by weight to 50% by weight, preferably 0.5% by weight to 40% by weight, and more preferably 1% by weight to 10% by weight. is there.
  • the coating solution is adjusted to an appropriate pH.
  • the pH of the coating solution is preferably about 2 to 10, more preferably about 6 to 8.
  • the temperature of the coating solution is preferably adjusted to 10 ° C to 40 ° C, more preferably 15 ° C to 30 ° C.
  • a coating film is formed by applying a coating liquid on a substrate.
  • the aromatic disazo compound is oriented in a predetermined direction by the orientation control force of the substrate.
  • the coating method using arbitrary appropriate coaters is employable.
  • the coater include bar coaters, roll coaters, spin coaters, comma coaters, gravure coaters, air knife coaters, and die coaters.
  • Step C is a step of forming a polarizer which is a dried coating film.
  • the solvent contained in the coating film is volatilized, and a dry coating film (lyotropic liquid crystal polarizer) containing a solid aromatic disazo compound is formed.
  • a dry coating film containing a solid aromatic disazo compound
  • the aromatic disazo compound has its orientation fixed while forming a supramolecular association.
  • Examples of the method for drying the coating include natural drying and forced drying.
  • forced drying for example, drying under reduced pressure, heating and drying, and heating under reduced pressure may be mentioned.
  • natural drying is used.
  • the drying time of the coating film can be appropriately set depending on the drying temperature and the type of solvent. For example, in the case of natural drying, the drying time is preferably 1 second to 120 minutes, more preferably 10 seconds to 5 minutes.
  • the drying temperature is preferably 10 ° C.
  • drying temperature does not mean the temperature of the surface or the inside of a coating film, but means the temperature of the atmosphere which dries a coating film.
  • Step D is a step of imparting water resistance to the polarizer by bringing the polarizer into contact with the water resistant treatment liquid.
  • Any appropriate method may be employed as a method of bringing the polarizer into contact with the water resistant treatment liquid.
  • As a contact method (a) apply a water resistant treatment liquid to the surface of a polarizer, (b) immerse a polarizing plate (polarizer) in a bath filled with the water resistant treatment liquid, (c) water resistant Examples of such a method include passing a polarizing plate (polarizer) into a bath filled with a processing solution.
  • the application of the water resistant treatment solution (a) may be performed using any suitable coater or spray.
  • the water resistant treatment liquid contains, for example, a crosslinking agent having a function of crosslinking an organic dye, and a solvent for dissolving or dispersing the crosslinking agent.
  • a crosslinking agent an organic nitrogen compound can be mentioned, for example, As a solvent, an aqueous solvent can be mentioned, for example.
  • an organic nitrogen compound a non-cyclic organic nitrogen compound having two or more cationic groups (preferably, a cationic group containing a nitrogen atom) in its molecule is preferably used.
  • acyclic organic nitrogen compounds examples include aliphatic diamines such as alkylene diamines or salts thereof; aliphatic triamines such as alkylene triamines or salts thereof; fats such as alkylene tetraamines Group tetraamines or salts thereof; aliphatic pentaamines such as alkylene pentaamines or salts thereof; and aliphatic ether diamines such as alkylene ether diamines or salts thereof.
  • aliphatic diamines such as alkylene diamines or salts thereof
  • aliphatic triamines such as alkylene triamines or salts thereof
  • fats such as alkylene tetraamines Group tetraamines or salts thereof
  • aliphatic pentaamines such as alkylene pentaamines or salts thereof
  • aliphatic ether diamines such as alkylene ether diamines or salts thereof.
  • the aqueous solvent those described for the
  • the concentration of the crosslinking agent in the water resistant treatment liquid is preferably 1% by mass to 50% by mass, and more preferably 5% by mass to 30% by mass.
  • the thickness of the iodine-based polarizer is preferably 15 ⁇ m or less, more preferably 13 ⁇ m or less, still more preferably 10 ⁇ m, and particularly preferably 8 ⁇ m or less.
  • the lower limit of the thickness of the polarizer is 2 ⁇ m in one embodiment and 3 ⁇ m in another embodiment.
  • the thickness of the lyotropic liquid crystal polarizer is preferably 1000 nm or less, more preferably 700 nm or less, and particularly preferably 500 nm or less.
  • the lower limit of the thickness of the lyotropic liquid crystal polarizer is preferably 100 nm, more preferably 200 nm, and particularly preferably 300 nm. If the thickness of the polarizer is in such a range, the projection light can be favorably emitted from the housing, and the incidence (transmission) of sunlight into the housing can be suppressed.
  • the polarizer preferably exhibits absorption dichroism at any wavelength of 380 nm to 780 nm.
  • the single transmittance of the polarizer is preferably 35.0% to 50.0%, and more preferably 40.0% to 45.0%.
  • the degree of polarization of the polarizer is 88% or more, preferably 89% or more, and more preferably 90% or more.
  • the retardation layer has an ultrahigh retardation of in-plane retardation Re (550) of 3000 nm or more.
  • the retardation layer typically has a refractive index characteristic of nx> ny.
  • the in-plane retardation Re (550) of the retardation film is preferably 4000 nm or more, more preferably 5000 nm or more.
  • the upper limit of the in-plane retardation Re (590) is, for example, 30000 nm, preferably 20000 nm. If the in-plane retardation is in such a range, it is possible to realize such an in-plane retardation without breaking the film by selecting an appropriate combination of the material and the manufacturing method (stretching method). It becomes. As a result, it is possible to industrially realize a polarizing plate (as a result, a head-up display device) capable of securing good visibility even when the display screen is viewed through a polarizing lens such as polarized sunglasses.
  • the birefringence ⁇ n xy of the retardation layer is 0.085 or more, preferably 0.09 or more, and more preferably 0.10 or more.
  • the upper limit of the birefringence ⁇ n xy is, for example, 0.15. If the birefringence ⁇ n xy is in such a range, a desired in-plane retardation can be realized with an operable or easy-to-use stretch ratio.
  • the retardation layer exhibits any suitable refractive index ellipsoid as long as it has a relationship of nx> ny.
  • the index ellipsoid of the retardation layer has a relationship of nx> ny ⁇ nz.
  • the polarizer and the retardation layer are laminated such that the absorption axis of the polarizer and the slow axis of the retardation layer form a predetermined angle.
  • the angle between the absorption axis of the polarizer and the slow axis of the retardation layer is preferably 35 ° to 55 °, more preferably 38 ° to 52 °, and still more preferably 40 ° to 50 °. It is preferably 42 ° to 48 °, and particularly preferably around 45 °.
  • the retardation layer is composed of any suitable retardation film that can satisfy the optical properties as described above.
  • the resin forming the retardation film include polyester resins (eg, polyethylene terephthalate, polyethylene naphthalate), polycarbonate resins, polyether resins (eg, polyether ether ketone), polystyrene resins, cyclic olefins Examples include resin.
  • polyester resins can be suitably used because they have a large intrinsic birefringence, a low draw ratio, and a relatively thin in-plane retardation relatively easily obtained.
  • the retardation layer (retardation film) is typically produced by stretching a resin film formed from the above resin in at least one direction.
  • melt extrusion for example, T-die molding
  • cast coating for example, casting
  • calendar molding heat pressing
  • coextrusion co-melting
  • multilayer extrusion inflation molding
  • T-die molding casting and inflation molding are used.
  • the thickness of the thickness (unstretched film) of the resin film may be set to any appropriate value depending on the desired optical properties, the stretching conditions described later, and the like.
  • the thickness is preferably 50 to 300 ⁇ m, and more preferably 80 to 250 ⁇ m.
  • stretching can employ
  • various stretching methods such as free end stretching, fixed end stretching / free end shrinkage, fixed end shrinkage can be used alone or simultaneously or sequentially.
  • the stretching direction can also be performed in various directions and dimensions, such as the horizontal direction, the vertical direction, the thickness direction, and the diagonal direction.
  • the stretching temperature is preferably in the range of the glass transition temperature (Tg) of the resin film ⁇ 20 ° C.
  • a retardation film (as a result, a retardation layer) having the desired optical properties (for example, refractive index ellipsoid, in-plane retardation, Nz coefficient).
  • the retardation layer is produced by uniaxially stretching or uniaxially stretching the resin film.
  • uniaxial stretching there is a method of stretching in the longitudinal direction (longitudinal direction) while traveling the resin film in the longitudinal direction.
  • Another specific example of uniaxial stretching is a method of stretching in the transverse direction using a tenter.
  • the stretch ratio is preferably 10% to 500%.
  • the retardation layer is produced by obliquely stretching a long resin film continuously in the direction of the angle ⁇ with respect to the long direction.
  • a long stretched film having an orientation angle of angle ⁇ with respect to the longitudinal direction of the film can be obtained, for example, roll-to-roll becomes possible upon lamination with a polarizer, and the manufacturing process Can be simplified.
  • the angle ⁇ corresponds to the angle between the absorption axis of the polarizer and the slow axis of the retardation layer as described above.
  • a tenter type drawing machine capable of applying a feed force or a drawing force or a take-up force at different speeds in the lateral and / or longitudinal directions
  • a tenter type stretching machine includes a transverse uniaxial stretching machine, a simultaneous biaxial stretching machine, etc., any appropriate stretching machine may be used as long as it can continuously stretch a long resin film obliquely.
  • the thickness of the stretched film (as a result, the retardation layer) is preferably 20 ⁇ m to 80 ⁇ m, more preferably 30 ⁇ m to 60 ⁇ m.
  • the substrate is an optional component of the retardation layer-attached polarizing plate, and is provided as necessary.
  • the substrate is composed of any suitable film that can be used as a protective film of a polarizer.
  • the material that is the main component of the film include cellulose-based resins such as triacetyl cellulose (TAC), polyester-based, polyvinyl alcohol-based, polycarbonate-based, polyamide-based, polyimide-based, polyether sulfone-based, and polysulfone-based Transparent resins such as polystyrenes, polynorbornenes, polyolefins, cyclic olefins, (meth) acrylics and acetates can be mentioned.
  • TAC triacetyl cellulose
  • TAC triacetyl cellulose
  • polyester-based polyvinyl alcohol-based
  • polycarbonate-based polyamide-based
  • polyimide-based polyimide-based
  • polyether sulfone-based and polysul
  • thermosetting resins such as (meth) acrylic resins, urethane resins, (meth) acrylic urethane resins, epoxy resins, and silicone resins, ultraviolet curable resins, and the like can also be mentioned.
  • glassy polymers such as siloxane polymers can also be mentioned.
  • a polymer film described in JP-A-2001-343529 (WO 01/37007) can also be used.
  • a resin composition containing a thermoplastic resin having a substituted or unsubstituted imide group in a side chain, and a thermoplastic resin having a substituted or unsubstituted phenyl group and a nitrile group in a side chain for example, a resin composition having an alternating copolymer of isobutene and N-methyl maleimide and an acrylonitrile / styrene copolymer can be mentioned.
  • the polymer film may be, for example, an extrusion of the resin composition.
  • (meth) acrylic resins and cyclic olefin resins can be used.
  • the (meth) acrylic resin has a Tg (glass transition temperature) of preferably 115 ° C. or more, more preferably 120 ° C. or more, still more preferably 125 ° C. or more, particularly preferably 130 ° C. or more. It is because it is excellent in durability.
  • the upper limit of the Tg of the (meth) acrylic resin is not particularly limited, but is preferably 170 ° C. or less from the viewpoint of formability and the like.
  • any appropriate (meth) acrylic resin can be adopted as the above (meth) acrylic resin, as long as the effects of the present invention are not impaired.
  • poly (meth) acrylic acid ester such as polymethyl methacrylate, methyl methacrylate- (meth) acrylic acid copolymer, methyl methacrylate- (meth) acrylic acid ester copolymer, methyl methacrylate-acrylic acid ester -(Meth) acrylic acid copolymer, methyl (meth) acrylic acid-styrene copolymer (MS resin etc.), polymer having alicyclic hydrocarbon group (for example, methyl methacrylate-cyclohexyl methacrylic acid copolymer And methyl methacrylate- (meth) acrylic acid norbornyl copolymer and the like.
  • C 1-6 alkyl poly (meth) acrylate such as methyl poly (meth) acrylate is mentioned. More preferably, a methyl methacrylate resin containing methyl methacrylate as a main component (50 to 100% by weight, preferably 70 to 100% by weight) can be mentioned.
  • the (meth) acrylic resin examples include, for example, (meth) acrylic resin having a ring structure in the molecule described in Acrippet VH or Acrypet VRL 20A manufactured by Mitsubishi Rayon Co., and JP-A-2004-70296. Examples thereof include resins, and high Tg (meth) acrylic resins obtained by intramolecular crosslinking and intramolecular cyclization.
  • (meth) acrylic resins having a lactone ring structure are particularly preferable in that they have high heat resistance, high transparency, and high mechanical strength.
  • Examples of the (meth) acrylic resin having a lactone ring structure include those described in JP-A-2000-230016, JP-A-2001-151814, JP-A-2002-120326, JP-A-2002-254544, and JP-A-2005. And (meth) acrylic resins having a lactone ring structure, as described in JP-A-146084 and the like.
  • the (meth) acrylic resin having a lactone ring structure preferably has a mass average molecular weight (sometimes referred to as a weight average molecular weight) of preferably 1000 to 2,000,000, more preferably 5000 to 1,000,000, still more preferably 10000 to 500000, Preferably, it is 50000 to 500000.
  • the (meth) acrylic resin having a lactone ring structure has a Tg (glass transition temperature) of preferably 115 ° C. or more, more preferably 125 ° C. or more, still more preferably 130 ° C. or more, particularly preferably 135 ° C., most preferably Is 140 ° C. or higher. It is because it is excellent in durability.
  • the upper limit of the Tg of the (meth) acrylic resin having a lactone ring structure is not particularly limited, but is preferably 170 ° C. or less from the viewpoint of formability and the like.
  • (meth) acrylic refers to acrylic and / or methacrylic.
  • cyclic olefin resin Any appropriate cyclic olefin resin may be employed as the cyclic olefin resin.
  • the substrate may be a substrate to which a coating solution containing an aromatic diazo compound is applied as it is, the substrate is peeled off, and the protective film as described above is formed on the peeled surface. You may paste together.
  • the substrate is preferably optically isotropic.
  • “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 thickness of the substrate is preferably 20 ⁇ m to 80 ⁇ m, more preferably 30 ⁇ m to 60 ⁇ m.
  • the polarizing plate with a retardation layer may further have a hard coat layer and / or an antiblocking layer on the side opposite to the polarizer of the substrate, if necessary.
  • the details of the hard coat layer are described, for example, in JP-A-2007-171943.
  • the details of the antiblocking layer are described in, for example, JP-A-2015-115171, JP-A-2015-141674, JP-A-2015-120870, and JP-A-2015-005272. The descriptions of these publications are incorporated herein by reference.
  • the polarizer 54 and the retardation layer 52 are bonded via any appropriate adhesive layer.
  • the polarizer 54 and the substrate 56 are bonded via any appropriate adhesive layer.
  • the adhesive layer may be a pressure-sensitive adhesive layer or an adhesive layer.
  • the pressure-sensitive adhesive that constitutes the pressure-sensitive adhesive layer can be typically an acrylic pressure-sensitive adhesive.
  • the adhesive constituting the adhesive layer can be typically an energy ray curable adhesive.
  • Example 1 Synthesis of organic coloring matter (aromatic diazo compound) 4-nitroaniline and 8-amino-2-naphthalene sulfonic acid, according to a conventional method (H. Hodaka "Theoretical Production Dye Chemistry 5th Edition" July 15, 1954 technique Diazotization and coupling reaction were carried out by the method described in Dojo, pp. 135-152) to obtain a monoazo compound.
  • the obtained monoazo compound was diazotized by the above-mentioned conventional method, and further, it was subjected to a coupling reaction with 1-amino-8-naphthol-2,4-disulfonic acid lithium salt to obtain a crude product. By salting out this with lithium chloride, an aromatic disazo compound of the following formula (4) was obtained.
  • Polarizing Plate A norbornene resin film (made by Nippon Zeon Co., Ltd .: product name “Zeonor”, ZF14-100) is prepared as a substrate, and the surface of this film is subjected to rubbing treatment and hydrophilization treatment (corona treatment) did.
  • the aromatic disazo compound of the above formula (4) was dissolved in ion-exchanged water to prepare a coating solution having a concentration of 4% by weight.
  • the coating solution is applied to the surface of the substrate subjected to rubbing treatment and hydrophilization treatment using a bar coater (manufactured by BUSHMAN: product name “Mayer rot HS4”), and naturally dried in a thermostatic chamber at 23 ° C.
  • a dried coating film (polarizer) was formed on the substrate, and the thickness of the polarizer was 300 nm. Subsequently, the base material / polarizer laminate was immersed in the water resistant treatment liquid for 2 seconds.
  • a water-resistant treatment liquid 1,3-propanediamine hydrochloride (manufactured by Tokyo Chemical Industry Co., Ltd.), 1,2-ethylenediamine hydrochloride (manufactured by Tokyo Chemical Industry Co., Ltd.), and bishexamethylenetriamine (Tokyo Chemical Industry Co., Ltd.)
  • An aqueous solution containing Kogyo Co., Ltd.) at a mass ratio of 55:15:30 was used.
  • the laminate of the base material / polarizer taken out from the water resistant treatment liquid was washed with water and dried to obtain a polarizer (a laminate of base material / polarizer) to which water resistance was imparted.
  • a high retardation film (product name "Cosmo Shine SRF” manufactured by Toyobo Co., Ltd.) having an in-plane retardation Re (550) of 8400 nm and a thickness of 80 ⁇ m made of polyethylene terephthalate resin was used.
  • Example 2 A laminate of a cover member / a polarizing plate with a retardation layer was produced in the same manner as in Example 1 except that the retardation film constituting the retardation layer was changed to the following materials. After vacuum drying a commercially available polycarbonate resin (manufactured by Mitsubishi Chemical Co., Ltd .: trade name "DURABIO D7340") at 100 ° C for 5 hours, a single-screw extruder (manufactured by Toshiba Machine Co., Ltd., cylinder temperature 230 ° C), T-die (width 1700mm) A film having a thickness of 220 ⁇ m was produced using a film production apparatus equipped with a temperature of 230 ° C.), a cast roll (temperature of 120 ° C.) and a winder.
  • a commercially available polycarbonate resin manufactured by Mitsubishi Chemical Co., Ltd .: trade name "DURABIO D7340"
  • a single-screw extruder manufactured by Toshiba Machine Co., Ltd., cylinder
  • the obtained laminate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Example 3 A laminate of a cover member / a polarizing plate with a retardation layer was produced in the same manner as in Example 1 except that the retardation film constituting the retardation layer was changed to the following materials. After vacuum drying a commercially available polycarbonate resin (manufactured by Mitsubishi Chemical Co., Ltd .: trade name "DURABIO D7340") at 100 ° C for 5 hours, a single-screw extruder (manufactured by Toshiba Machine Co., Ltd., cylinder temperature 230 ° C), T-die (width 1700mm) A film having a thickness of 220 ⁇ m was produced using a film production apparatus equipped with a temperature of 230 ° C.), a cast roll (temperature of 120 ° C.) and a winder.
  • a commercially available polycarbonate resin manufactured by Mitsubishi Chemical Co., Ltd .: trade name "DURABIO D7340"
  • a single-screw extruder manufactured by Toshiba Machine Co., Ltd., cylinder
  • the obtained laminate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • Comparative Example 1 A cover member / polarizer laminate was produced in the same manner as in Example 1 except that the retardation layer was not provided. The obtained laminate was subjected to the same evaluation as in Example 1. The results are shown in Table 1.
  • the laminate of the example has an increase in reflectance at a predetermined incident angle. This means that the image of the head-up display is not blacked out when viewed through polarized sunglasses. That is, according to the Example of this invention, it turns out that the head-up display apparatus excellent in the visibility at the time of visual recognition via polarization
  • a head-up display device may be suitably used for a vehicle (typically, a car) having a windshield.
  • Reference Signs List 10 display 20 reflector 30 housing 40 cover member 50 polarizing plate with retardation layer 52 retardation layer 54 polarizer 56 base 100 head-up display device

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Abstract

L'invention concerne un appareil d'affichage tête haute (100) ayant une excellente visibilité pendant la visualisation par l'intermédiaire de lunettes de soleil à polarisation, et ayant une excellente résistance à la chaleur. L'appareil d'affichage tête haute (100) selon la présente invention comprend : un dispositif d'affichage (10) qui émet une lumière de projection ; au moins un dispositif de réflexion (20) qui réfléchit la lumière de projection ; un boîtier (30) qui possède une partie d'ouverture (32) et dans lequel le dispositif d'affichage (10) et le dispositif de réflexion (20) sont disposés ; un élément de couvercle (40) qui recouvre la partie d'ouverture (32) ; et une plaque de polarisation pourvue d'une couche de retard (50) qui est disposée sur le côté intérieur de boîtier de l'élément de couvercle (40) et qui possède une couche de retard (52) et un polariseur (54) dans cet ordre à partir du côté de l'élément de couvercle (40). La différence de phase dans le plan Re (550) de la couche de retard (52) est d'au moins 3 000 nm. L'appareil d'affichage tête haute (100) selon la présente invention est configuré de telle sorte que l'angle de réflexion de la lumière de projection émise par le boîtier à travers la partie d'ouverture (32) est d'au plus 30°, ou est d'au moins 40° par rapport à un pare-brise.
PCT/JP2018/038447 2017-10-19 2018-10-16 Appareil d'affichage tête haute Ceased WO2019078190A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201880067705.1A CN111226158B (zh) 2017-10-19 2018-10-16 抬头显示器装置
KR1020257016172A KR20250079038A (ko) 2017-10-19 2018-10-16 헤드업 디스플레이 장치
EP18868428.6A EP3699669A4 (fr) 2017-10-19 2018-10-16 Appareil d'affichage tête haute
US16/756,931 US11966050B2 (en) 2017-10-19 2018-10-16 Head-up display apparatus
KR1020207010414A KR20200074106A (ko) 2017-10-19 2018-10-16 헤드업 디스플레이 장치

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* Cited by examiner, † Cited by third party
Title
YUTAKA HOSODA: "Theoretical Production Dye Chemistry", 15 July 1968, GIHODO, pages: 135 - 152

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