WO2023127908A1 - 仮想現実表示装置 - Google Patents

仮想現実表示装置 Download PDF

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Publication number
WO2023127908A1
WO2023127908A1 PCT/JP2022/048334 JP2022048334W WO2023127908A1 WO 2023127908 A1 WO2023127908 A1 WO 2023127908A1 JP 2022048334 W JP2022048334 W JP 2022048334W WO 2023127908 A1 WO2023127908 A1 WO 2023127908A1
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Prior art keywords
liquid crystal
layer
retardation layer
polarizer
virtual reality
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PCT/JP2022/048334
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English (en)
French (fr)
Japanese (ja)
Inventor
直良 山田
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Fujifilm Corp
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Fujifilm Corp
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Priority to JP2023571070A priority Critical patent/JPWO2023127908A1/ja
Publication of WO2023127908A1 publication Critical patent/WO2023127908A1/ja
Priority to US18/754,503 priority patent/US20240345306A1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • 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
    • G02B27/02—Viewing or reading apparatus
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements

Definitions

  • the present invention relates to a virtual reality display device.
  • a virtual reality display device is a display device that allows a user to wear a dedicated headset on his or her head and view images displayed through a lens, thereby providing a sense of realism as if one were in a virtual world.
  • a virtual reality display device generally has an image display panel and a Fresnel lens, but the distance from the image display panel to the Fresnel lens is long, which makes the headset thicker and less comfortable to wear. Therefore, as described in Patent Document 1, an image display panel, a reflective polarizer, and a half mirror are provided, and a light beam emitted from the image display panel is reciprocated between the reflective polarizer and the half mirror.
  • a lens configuration called a pancake lens has been proposed in which the thickness of the entire headset is reduced by increasing the thickness of the headset.
  • Patent Document 1 discloses a configuration of a pancake lens that uses a reflective linear polarizer as the reflective polarizer and includes an image display panel, a reflective linear polarizer, and a half mirror in this order. .
  • the reflective polarizer must act as a concave mirror with respect to light rays incident from the half mirror side.
  • the reflective linear polarizer In order to give the function of a concave mirror to the reflective linear polarizer, it is necessary to shape the reflective linear polarizer into a curved shape. According to the studies of the present inventors, when the reflective linear polarizer is formed into a curved surface shape, the optical axis of the reflective linear polarizer is distorted, and incident light cannot be properly reflected and transmitted, and rather leaked light. was found to increase On the other hand, according to the study of the present inventor, it is possible to suppress the leakage light of the pancake lens when the image display panel, the reflective polarizer, and the half mirror are included in this order. I found out.
  • the present invention has been made in view of the above problems, and the problem to be solved by the present invention is to provide a thin virtual reality display device having a pancake lens capable of reducing leakage light. be.
  • the first retardation layer and the second retardation layer are both ⁇ /4 retardation layers.
  • the virtual reality display device according to any one of [1] to [8], which is a liquid crystal diffraction element containing
  • a thin virtual reality display device having a pancake lens capable of reducing leaked light.
  • FIG. 1 shows an example of the virtual reality display device of the present invention.
  • FIG. 2 is a diagram for explaining the action of the virtual reality display device shown in FIG.
  • FIG. 3 is a diagram conceptually showing the configuration of the virtual reality display device according to the second embodiment.
  • FIG. 4 is a diagram conceptually showing the configuration of the virtual reality display device according to the third embodiment.
  • FIG. 5 is a diagram conceptually showing the configuration of the virtual reality display device of Comparative Example 1. As shown in FIG.
  • the term "perpendicular” does not mean that the angle formed by two axes or the like is strictly 90°, but 90° ⁇ 10°, preferably 90° ⁇ 5°. .
  • parallel does not mean that the angle formed by two axes or the like is strictly 0°, but 0° ⁇ 10°, preferably 0° ⁇ 5°.
  • 45° does not mean that the angle formed by two axes or the like is strictly 45°, but 45° ⁇ 10°, preferably 45° ⁇ 5°.
  • “mutually orthogonal polarization states” refer to polarization states located at antipodes to each other on the Poincare sphere. Right-handed circularly polarized light) and left-handed circularly polarized light (left-handed circularly polarized light) correspond to this.
  • the "absorption axis” means the polarization direction in which the absorbance is maximized in the plane when linearly polarized light is incident.
  • the “reflection axis” means the polarization direction in which the reflectance is maximized in the plane when linearly polarized light is incident.
  • the “transmission axis” means a direction perpendicular to the absorption axis or the reflection axis in the plane.
  • the “slow axis” means the direction in which the refractive index is maximized in the plane.
  • the retardation means in-plane retardation and is described as Re( ⁇ ) unless otherwise specified.
  • Re( ⁇ ) represents the in-plane retardation at the wavelength ⁇
  • the wavelength ⁇ is 550 nm unless otherwise specified.
  • the retardation in the thickness direction at the wavelength ⁇ is described as Rth( ⁇ ) in this specification.
  • values measured at wavelength ⁇ using AxoScan OPMF-1 can be used.
  • the virtual reality display device of the present invention includes at least an image display panel, a first absorptive linear polarizer, a first retardation layer, a reflective circular polarizer, a half mirror, and a second retardation layer. and a second absorbing linear polarizer in this order, and the above-mentioned reflective circular polarizer has the action of a concave mirror with respect to light rays incident from the above-mentioned half mirror side.
  • FIG. 1 shows a diagram conceptually showing an example of the virtual reality display device of the present invention.
  • the virtual reality display device 100 shown in FIG. It has a circular polarizer 30, an antireflection layer 50, a half mirror 40, a ⁇ /4 retardation layer 12, and an absorption linear polarizer 22 in this order.
  • the ⁇ /4 retardation layer 13 is the third retardation layer in the present invention
  • the absorption linear polarizer 21 is the first absorption linear polarizer in the present invention
  • ⁇ / 4 retardation layer 11 is the first retardation layer in the present invention.
  • the reflective circular polarizer 30 is arranged facing the positive C plate 60 .
  • the reflective circular polarizer 30 is laminated on the support 80 having a convex surface on the side opposite to the image display panel 70 side. formed in the shape of Therefore, the reflective circular polarizer 30 is formed concavely toward the half mirror 40 .
  • the reflective circular polarizer 30 acts as a concave mirror with respect to the configuration in which light is incident from the half mirror 40 side.
  • the support 80 is a light-transmissive support having a convex surface on the image display panel 70 side and a flat surface on the other side. That is, a plano-convex lens, a meniscus lens, or the like can be used as the support 80 .
  • An antireflection layer 50 is laminated on the surface of the support 80 opposite to the surface on which the reflective circular polarizer 30 is laminated.
  • the half mirror 40 is arranged facing the antireflection layer 50 .
  • the half mirror 40 is laminated on the support 82 on the side opposite to the reflective circular polarizer 30 side.
  • the support 82 is a light-transmitting support having flat surfaces on both sides.
  • a ⁇ /4 retardation layer 12 and an absorbing linear polarizer 22 are laminated on the surface of the support 82 opposite to the surface on which the half mirror 40 is laminated. It is The ⁇ /4 retardation layer 12 is the second retardation layer in the invention, and the linear absorption polarizer 22 is the second linear absorption polarizer in the invention.
  • arrows represent light
  • R represents right-handed circularly polarized light
  • L represents left-handed circularly polarized light.
  • non-polarized light image light
  • it passes through the ⁇ /4 retardation layer 13 as non-polarized light and is converted into linearly polarized light that is the absorbing linear polarizer 21, and ⁇ / 4
  • the light is converted into circularly polarized light by the retardation layer 11 . That is, the transmission axis of the absorbing linear polarizer 21 and the slow axis of the ⁇ /4 retardation layer 11 are arranged at approximately 45°.
  • the left-handed circularly polarized light enters the reflective circular polarizer 30 .
  • the reflective circular polarizer 30 reflects right-handed circularly polarized light and transmits left-handed circularly polarized light. and enters the half mirror 40 .
  • the ⁇ /4 retardation layer 12 converts the left-handed circularly polarized light into linearly polarized light
  • the absorbing linear polarizer 22 absorbs the linearly polarized light in the direction converted from the left-handed circularly polarized light by the ⁇ /4 retardation layer 12. , and absorbs this linearly polarized light. That is, the ⁇ /4 retardation layer 12 and the absorptive linear polarizer 22 act as a circular polarizer that absorbs left-handed circularly polarized light and transmits right-handed circularly polarized light.
  • the reflective circular polarizer 30 reflects right-handed circularly polarized light, the incident right-handed circularly polarized light is reflected toward the half mirror 40 .
  • the reflective circular polarizer 30 since the reflective circular polarizer 30 has a function of a concave mirror with respect to the light rays incident from the half mirror 40 side, the reflective circular polarizer 30 is condensed.
  • the image display panel 30 looks as if the light is being emitted from the back side (the side opposite to the user U side). As a result, the video (image) displayed by the image display panel 30 is viewed by the user U as a virtual image behind the image display panel 30 .
  • the positive C plate 60 corrects the light so that it does not become elliptically polarized and maintains a high degree of circular polarization even when the light is obliquely incident.
  • the left-handed circularly polarized light passing through the positive C plate 60 enters the ⁇ /4 retardation layer 11 and is converted into linearly polarized light.
  • This linearly polarized light passes through the absorbing linear polarizer 21, enters the ⁇ /4 retardation layer 13, and is converted into, for example, left-handed circularly polarized light.
  • This left circularly polarized light is reflected by the surface of the image display panel 30 or the like.
  • the left-handed circularly polarized light is converted to right-handed circularly polarized light upon reflection
  • the right-handed circularly polarized light reflected by the surface of the image display panel 30 or the like enters the ⁇ /4 retardation layer 13, it is converted to linearly polarized light and absorbed.
  • the linear polarizer 21 it is absorbed by the linear absorptive polarizer 21 because it is linearly polarized light orthogonal to the transmission axis of the linear absorptive polarizer 21 .
  • a configuration including an image display panel, a reflective polarizer, and a half mirror is known as a conventional virtual reality display device. Disturbance, unfavorable reflection, etc., do not reciprocate between the reflective polarizer and the half-mirror, resulting in leaked light, which leads to the occurrence of double images, a decrease in contrast, and the like.
  • an image display panel, a reflective linear polarizer, and a half mirror in this order, polarization disturbance and undesirable reflection are suppressed, and leakage light is reduced. As a result, it has been proposed to suppress the occurrence of double images and the decrease in contrast.
  • the reflective linear polarizer must act as a concave mirror with respect to light rays incident from the half mirror side. was there. Furthermore, in order to give the function of a concave mirror to the reflective linear polarizer, it was necessary to shape the reflective linear polarizer into a curved shape. According to the studies of the present inventors, when the reflective linear polarizer is formed into a curved surface shape, the optical axis of the reflective linear polarizer is distorted, and incident light cannot be properly reflected and transmitted, and rather leaked light. was found to increase
  • the virtual reality display device of the present invention includes an image display panel, a first absorptive linear polarizer, a first retardation layer, a reflective circular polarizer, a half mirror, and a second and a second absorptive linear polarizer in this order, and the reflective circular polarizer acts as a concave mirror on light rays incident from the half mirror side.
  • the reflective circular polarizer since the reflective circular polarizer is formed into a curved shape to act as a concave mirror, the problem of distortion of the optical axis does not occur, so incident light can be appropriately reflected and transmitted. light leakage can be reduced.
  • the ⁇ /4 retardation layer 13 is provided between the image display panel 70 and the linear absorption polarizer 21 as a preferred embodiment.
  • the ⁇ /4 retardation layer 13 the light reflected by the half mirror 40, transmitted through the reflective circular polarizer 30, and reflected by the surface of the image display panel 70 is absorbed by the absorptive linear polarizer 21. It is possible to suppress the occurrence of leaked light.
  • a support 80 that supports the reflective circular polarizer 30 in a curved manner is provided. It has an antireflection layer 50 on its surface. As a result, it is possible to suppress the occurrence of unnecessary reflection at the air interface of the support 80, thereby suppressing the occurrence of leaked light.
  • the virtual reality display device of the present invention may be configured without the support 80 .
  • the half mirror 40, the ⁇ /4 retardation layer 12, and the linear absorption polarizer 22 are configured to be supported by the support 82, but the configuration is not limited to this.
  • the half mirror 40, the ⁇ /4 retardation layer 12 and the linear absorption polarizer 22 may be directly laminated.
  • an image display panel 70, a ⁇ / 4 retardation layer 13, an absorbing linear polarizer 21, a ⁇ / 4 retardation layer 11, and a positive C plate 60 are attached.
  • an image display panel 70, a ⁇ / 4 retardation layer 13, an absorbing linear polarizer 21, a ⁇ / 4 retardation layer 11, and a positive C plate 60 are attached.
  • the ⁇ / 4 retardation layer 11 (positive C plate 60) and the reflective circular polarizer 30 are separated, but not limited thereto, ⁇ / 4 retardation layer 11 (positive C plate 60) and the reflective circular polarizer 30 may be in contact, the reflective circular polarizer 30, (positive C plate 60), the ⁇ / 4 retardation layer 11, the absorbing linear polarizer 21 , and the ⁇ /4 retardation layer 13 may be adhered.
  • the reflective circular polarizer 30, positive C plate 60
  • the ⁇ / 4 retardation layer 11 the absorbing linear polarizer 21
  • the ⁇ /4 retardation layer 13 may be adhered.
  • each layer may be formed into a curved surface by vacuum forming or the like.
  • each layer may be formed into a curved surface and then bonded.
  • the ⁇ /4 retardation layer 11 (positive C plate 60) and the reflective circular polarizer 30 are separated, the ⁇ /4 retardation layer 11 (positive An antireflection layer 52 may be provided on the surface of the C plate 60). As a result, it is possible to suppress the occurrence of unnecessary reflection at the air interface of the ⁇ /4 retardation layer 11 (positive C plate 60), thereby suppressing the occurrence of leaked light.
  • the support 80 and the half mirror 40 are spaced apart, but the present invention is not limited to this. good.
  • the antireflection layer 50 is unnecessary. As a result, there is no air layer between the layers, and it is possible to suppress the occurrence of unnecessary reflection at the air interface, thereby suppressing the occurrence of leaked light.
  • the focal length of the concave mirror in the reflective circular polarizer 30 may be appropriately set according to the performance required of the virtual reality display device. From the viewpoint of thinning, the focal length of the concave mirror is preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 15 mm or less.
  • the focal length of a concave mirror is the distance between the focal point at which the rays reflected by the reflecting surface converge and the bottom of the concave surface of the concave mirror when parallel light is incident on the reflecting surface of the concave mirror. Further, when the concave mirror is formed of a liquid crystal diffraction element, which will be described later, the focal length is the distance between the focal point where the reflected light is collected and the reflecting surface of the liquid crystal diffraction element.
  • the concave mirror When the concave mirror is formed by forming the reflective circular polarizer 30 on a support having a convex surface as described above, the reflected light on the reflecting surface is refracted by the lens, but the reflected light is Since light is focused at a position, that position can be considered a focal point. In addition, although not all rays of reflected light necessarily converge on one point, the position where the reflected light converges can be regarded as the focal point. Also, since the focus can have different values depending on the wavelength of light, the focus can be examined at any wavelength of visible light.
  • the half mirror 40 has a flat shape, but the shape is not limited to this, and the half mirror 40 may have a curved surface. In that case, it is preferable that the half mirror 40 act as a convex mirror with respect to the light incident from the reflective circular polarizer 30 side.
  • a known image display panel can be used as the image display panel used in the present invention.
  • Examples thereof include display panels in which self-luminous minute light emitters are arranged on a transparent substrate, such as organic electroluminescence display panels, LED (Light Emitting Diode) display panels, and micro LED display panels.
  • a liquid crystal display panel is exemplified.
  • organic electroluminescent display devices are also referred to as OLEDs.
  • OLED is an abbreviation of "Organic Light Emitting Diode”.
  • the retardation layer used in the present invention has the function of converting the emitted light into approximately linearly polarized light when circularly polarized light is incident thereon.
  • a ⁇ /4 retardation layer in which Re is approximately 1/4 wavelength at any wavelength in the visible range, and at this time, the in-plane retardation Re (550) is 120 nm to 150 nm at a wavelength of 550 nm. preferably 125 nm to 145 nm, even more preferably 135 nm to 140 nm.
  • a retardation layer having an Re of about 3/4 wavelength or about 5/4 wavelength is also preferable because it can convert linearly polarized light into circularly polarized light.
  • the retardation layer used in the present invention preferably has reverse dispersion with respect to wavelength. Having reverse dispersion is preferable because circularly polarized light can be converted into linearly polarized light over a wide wavelength range in the visible region.
  • having reverse dispersion with respect to wavelength means that the value of the phase difference at the wavelength increases as the wavelength increases.
  • the retardation layer having reverse dispersion can be produced by, for example, referring to JP-A-2017-049574 and the like, and uniaxially stretching a polymer film such as a modified polycarbonate resin film having reverse dispersion. Further, the retardation layer having reverse dispersion may have substantially reverse dispersion, for example, as disclosed in Japanese Patent No. 06259925, Re is about 1/4 wavelength.
  • a retardation layer and a retardation layer in which Re is about 1/2 wavelength can also be produced by stacking them so that their slow axes form an angle of about 60°.
  • the 1/4 wavelength retardation layer and the 1/2 wavelength retardation layer each have normal dispersion (the retardation value at the wavelength increases as the wavelength increases), the visible region It is known that circularly polarized light can be converted into linearly polarized light over a wide wavelength range and can be regarded as having substantially reverse dispersion.
  • the retardation layer used in the present invention preferably has a layer formed by fixing a uniformly aligned liquid crystal compound.
  • a layer in which a rod-like liquid crystal compound is uniformly aligned horizontally to the in-plane direction, a layer in which a discotic liquid crystal compound is uniformly aligned perpendicular to the in-plane direction, and the like can be used.
  • a retardation layer having reverse dispersion can be produced by uniformly aligning and fixing a rod-shaped liquid crystal compound having reverse dispersion. can.
  • the retardation layer used in the present invention preferably has a layer formed by immobilizing a liquid crystal compound twisted with the thickness direction as the helical axis.
  • a position having a layer formed by fixing a rod-like liquid crystal compound or a discotic liquid crystal compound twisted with the thickness direction as a helical axis can also be used, and in this case, the retardation layer can be considered to have substantially reverse dispersion properties, which is preferable.
  • the thickness of the retardation layer is not particularly limited, it is preferably 0.1 to 8 ⁇ m, more preferably 0.3 to 5 ⁇ m, from the viewpoint of thinning.
  • the retardation layer of the present invention may contain a support, an alignment layer, a retardation layer, and the like. It may be a temporary support. When using a temporary support, after transferring the retardation layer to another member, by peeling and removing the temporary support, the laminate can be made thinner, and the retardation of the temporary support is preferable because it can eliminate adverse effects on the degree of polarization of transmitted light and reflected light.
  • the type of support is not particularly limited, it is preferably transparent, and examples thereof include films of cellulose acylate, polycarbonate, polysulfone, polyethersulfone, polyacrylate and polymethacrylate, cyclic polyolefin, polyolefin, polyamide, polystyrene, polyester, and the like.
  • the support is a temporary support, a support with high tear strength is preferable from the viewpoint of preventing breakage during peeling.
  • the support preferably has a small retardation from the viewpoint of suppressing adverse effects on the degree of polarization of transmitted light and reflected light.
  • the magnitude of Re is preferably 10 nm or less, and the absolute value of the magnitude of Rth is preferably 50 nm or less. Further, even when the support is used as the temporary support described above, it is preferable that the retardation of the temporary support is small in order to inspect the quality of the retardation layer and other laminates.
  • the absorptive linear polarizer used in the present invention is an absorptive polarizer that absorbs linearly polarized incident light along the absorption axis and transmits linearly polarized light along the transmission axis.
  • a general polarizer can be used as the absorption linear polarizer.
  • a polarizer obtained by dyeing polyvinyl alcohol or other polymer resin with a dichroic substance and stretching the polarizer can be used.
  • a polarizer in which a dichroic substance is oriented using the orientation of a liquid crystal compound may be used.
  • a polarizer obtained by dyeing polyvinyl alcohol with iodine and stretching is preferred.
  • the thickness of the absorbing linear polarizer is preferably 10 ⁇ m or less, more preferably 7 ⁇ m or less, and even more preferably 5 ⁇ m or less. If the absorbing linear polarizer is thin, it is possible to prevent cracks and breakage of the film when the laminated optical film is stretched or molded.
  • the single plate transmittance of the absorbing linear polarizer is preferably 40% or more, more preferably 42% or more.
  • the degree of polarization is preferably 90% or more, more preferably 95% or more, and even more preferably 99% or more.
  • the single-plate transmittance and the degree of polarization of the absorption linear polarizer are measured using an automatic polarizing film measuring device: VAP-7070 (manufactured by JASCO Corporation).
  • VAP-7070 automatic polarizing film measuring device
  • the direction of the transmission axis of the absorbing linear polarizer preferably coincides with the direction of the polarization axis of the light converted into linearly polarized light by the retardation layer.
  • the angle formed by the transmission axis of the absorptive linear polarizer and the slow axis of the ⁇ /4 retardation layer is preferably about 45°. .
  • the absorptive linear polarizer used in the present invention is also preferably an optical absorption anisotropic layer containing a liquid crystal compound and a dichroic substance.
  • An absorptive linear polarizer containing a liquid crystal compound and a dichroic substance is preferable because it can be made thin and is less likely to crack or break even when stretching, molding, and the like are performed.
  • the thickness of the light absorption anisotropic layer is not particularly limited, it is preferably 0.1 to 8 ⁇ m, more preferably 0.3 to 5 ⁇ m, from the viewpoint of thinning.
  • An absorptive linear polarizer containing a liquid crystal compound and a dichroic substance can be produced, for example, with reference to Japanese Unexamined Patent Application Publication No.
  • the degree of orientation of the dichroic substance in the optical absorption anisotropic layer is preferably 0.95 or more, more preferably 0.97 or more. preferable.
  • the absorptive linear polarizer of the present invention comprises an optical absorption anisotropic layer containing a liquid crystal compound and a dichroic substance
  • the absorptive linear polarizer comprises a support, an alignment layer, and an optical absorption anisotropic layer.
  • the support and the alignment layer may be temporary supports that are peeled off and removed after the absorptive linear polarizer is attached to another member.
  • the laminate can be made thinner by transferring the optical absorption anisotropic layer to another member and then removing the temporary support by peeling it off. It is preferable because the adverse effect of the retardation on the degree of polarization of transmitted light and reflected light can be eliminated.
  • the type of support is not particularly limited, it is preferably transparent, and examples thereof include films of cellulose acylate, polycarbonate, polysulfone, polyethersulfone, polyacrylate and polymethacrylate, cyclic polyolefin, polyolefin, polyamide, polystyrene, polyester, and the like. can be used. Among them, cellulose acylate film, cyclic polyolefin, polyacrylate, and polymethacrylate are preferred. Also, commercially available cellulose acetate films (for example, “TD80U” and “Z-TAC” manufactured by Fuji Film Co., Ltd.) can be used.
  • the support is a temporary support
  • a support with high tear strength is preferable from the viewpoint of preventing breakage during peeling.
  • polycarbonate and polyester films are preferred.
  • the support preferably has a small retardation from the viewpoint of suppressing adverse effects on the degree of polarization of transmitted light and reflected light.
  • the magnitude of Re is preferably 10 nm or less
  • the absolute value of the magnitude of Rth is preferably 50 nm or less.
  • the retardation of the temporary support should be small in quality inspection of the optical absorption anisotropic layer and other laminates. is preferred.
  • the half mirror used in the present invention is a conventionally known half mirror that transmits approximately half of the incident light and reflects the remaining approximately half.
  • the transmittance of the half mirror is preferably 50 ⁇ 30%, more preferably 50 ⁇ 10%, most preferably 50%.
  • the half mirror is made of a transparent resin such as polyethylene terephthalate (PET), cycloolefin polymer (COP), polymethyl methacrylate (PMMA), or a substrate made of glass or the like, and a metal such as silver or aluminum is coated on the substrate. and the like.
  • a reflective layer made of metal such as silver or aluminum is formed on the surface of the substrate by vapor deposition or the like.
  • the thickness of the reflective layer is preferably 1 to 20 nm, more preferably 2 to 10 nm, even more preferably 3 to 6 nm. Moreover, it is preferable that the base material does not have retardation. From that point of view, the base material of the half mirror is preferably cycloolefin polymer (COP), polymethyl methacrylate (PMMA), or glass.
  • COP cycloolefin polymer
  • PMMA polymethyl methacrylate
  • a reflective circular polarizer is a polarizer that transmits right-handed circularly polarized light or left-handed circularly polarized light and reflects circularly polarized light whose rotation direction is opposite to that of the transmitted circularly polarized light.
  • a reflective circular polarizer having a cholesteric liquid crystal layer is exemplified.
  • the cholesteric liquid crystal layer is a liquid crystal phase obtained by fixing a cholesterically aligned liquid crystal phase (cholesteric liquid crystal phase).
  • a cholesteric liquid crystal layer has a helical structure in which a liquid crystal compound is spirally revolved and stacked.
  • a cycle helical cycle
  • a liquid crystal compound that spirals spirally has a structure in which multiple cycles are stacked.
  • the cholesteric liquid crystal layer reflects right-handed circularly polarized light or left-handed circularly polarized light in a specific wavelength range and transmits other light, depending on the length of the helical period and the direction of helical rotation (sense) of the liquid crystal compound. do.
  • the reflective circular polarizer may include, for example, a cholesteric liquid crystal layer having a central wavelength of selective reflection for red light, a central wavelength for selective reflection of green light, It may have a plurality of cholesteric liquid crystal layers, such as a cholesteric liquid crystal layer having a wavelength and a cholesteric liquid crystal layer having a central wavelength of selective reflection for blue light.
  • the reflective circular polarizer when it has a cholesteric liquid crystal layer, it may have a support and an alignment film for orienting the liquid crystal compound in the cholesteric liquid crystal layer.
  • the thickness of the reflective circular polarizer depends on the type of the reflective circular polarizer, etc., so that the polarized light that should be reflected can be sufficiently reflected and the polarized light that should be transmitted can be sufficiently transmitted. It should be adjusted accordingly.
  • the reflective circular polarizer acts as a concave mirror with respect to light rays incident from the half mirror side.
  • the reflective circular polarizer itself should be made concave.
  • the reflective circular polarizer is a cholesteric liquid crystal layer having a radial liquid crystal orientation pattern in which the direction of the optic axis derived from the liquid crystal compound is continuously rotated along one in-plane direction on either surface. It may be a liquid crystal diffraction element containing.
  • the reflective circular polarizer can act as a concave mirror even though it is on a flat plate.
  • the virtual reality display device can be made thinner.
  • a liquid crystal diffraction element including a cholesteric liquid crystal layer having a radial liquid crystal alignment pattern As a reflective circular polarizer, the virtual reality display device can be made thinner.
  • a cholesteric liquid crystal layer having a radial liquid crystal alignment pattern the configuration described in International Publication No. 2019/131950 or the like can be used.
  • the cholesteric liquid crystal layer can be formed by fixing a cholesteric liquid crystal phase in layers.
  • the structure in which the cholesteric liquid crystal phase is fixed may be any structure as long as the alignment of the liquid crystal compound in the cholesteric liquid crystal phase is maintained.
  • the structure is polymerized and cured by UV irradiation, heating, or the like to form a layer having no fluidity, and at the same time, the structure is changed to a state in which the orientation is not changed by an external field or external force.
  • the polymerizable liquid crystal compound may be polymerized by a curing reaction and lose liquid crystallinity.
  • Examples of materials used for forming a cholesteric liquid crystal layer in which a cholesteric liquid crystal phase is fixed include a liquid crystal composition containing a liquid crystal compound.
  • the liquid crystal compound is preferably a polymerizable liquid crystal compound.
  • the liquid crystal composition used for forming the cholesteric liquid crystal layer may further contain a surfactant and a chiral agent.
  • the polymerizable liquid crystal compound may be a rod-like liquid crystal compound or a discotic liquid crystal compound.
  • rod-like polymerizable liquid crystal compounds that form a cholesteric liquid crystal phase include rod-like nematic liquid crystal compounds.
  • Rod-shaped nematic liquid crystal compounds include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano-substituted phenylpyrimidines, and alkoxy-substituted phenylpyrimidines.
  • phenyldioxane, tolan, and alkenylcyclohexylbenzonitriles are preferably used. Not only low-molecular-weight liquid crystal compounds but also high-molecular liquid-crystal compounds can be used.
  • a polymerizable liquid crystal compound is obtained by introducing a polymerizable group into a liquid crystal compound.
  • polymerizable groups include unsaturated polymerizable groups, epoxy groups, and aziridinyl groups, with unsaturated polymerizable groups being preferred, and ethylenically unsaturated polymerizable groups being more preferred.
  • Polymerizable groups can be introduced into molecules of liquid crystal compounds by various methods.
  • the number of polymerizable groups possessed by the polymerizable liquid crystal compound is preferably 1 to 6, more preferably 1 to 3. Examples of polymerizable liquid crystal compounds are described in Makromol. Chem. , 190, 2255 (1989), Advanced Materials 5, 107 (1993), U.S. Pat. No. 4,683,327, U.S.
  • a cyclic organopolysiloxane compound having a cholesteric phase as disclosed in JP-A-57-165480 can be used as polymerizable liquid crystal compounds other than the above.
  • the polymer liquid crystal compounds described above there are polymers in which mesogenic groups exhibiting liquid crystal are introduced into the main chain, side chains, or both of the main chain and side chains, and polymer cholesteric compounds in which cholesteryl groups are introduced into the side chains.
  • Liquid crystals, liquid crystalline polymers as disclosed in JP-A-9-133810, and liquid-crystalline polymers as disclosed in JP-A-11-293252 and the like can be used.
  • discotic Liquid Crystal Compound As the discotic liquid crystal compound, for example, those described in JP-A-2007-108732 and JP-A-2010-244038 can be preferably used.
  • the amount of the polymerizable liquid crystal compound added in the liquid crystal composition is preferably 75 to 99.9% by mass, and preferably 80 to 99%, based on the solid content mass (mass excluding the solvent) of the liquid crystal composition. % by mass is more preferred, and 85 to 90% by mass is even more preferred.
  • the liquid crystal composition used for forming the cholesteric liquid crystal layer may contain a surfactant.
  • the surfactant is preferably a compound that can stably or quickly function as an alignment control agent that contributes to the alignment of the cholesteric liquid crystal phase.
  • Examples of surfactants include silicone-based surfactants and fluorine-based surfactants, with fluorine-based surfactants being preferred examples.
  • the surfactant include compounds described in paragraphs [0082] to [0090] of JP-A-2014-119605, and compounds described in paragraphs [0031] to [0034] of JP-A-2012-203237. , Compounds exemplified in paragraphs [0092] and [0093] of JP-A-2005-099248, paragraphs [0076] to [0078] and paragraphs [0082] to [0085] of JP-A-2002-129162 compounds exemplified therein, and fluorine (meth)acrylate polymers described in paragraphs [0018] to [0043] of JP-A-2007-272185.
  • surfactant may be used individually by 1 type, and may use 2 or more types together.
  • fluorosurfactant compounds described in paragraphs [0082] to [0090] of JP-A-2014-119605 are preferable.
  • the amount of the surfactant added in the liquid crystal composition is preferably 0.01 to 10% by mass, more preferably 0.01 to 5% by mass, and 0.02 to 1% by mass with respect to the total mass of the liquid crystal compound. is more preferred.
  • a chiral agent has a function of inducing a helical structure of a cholesteric liquid crystal phase.
  • the chiral agent may be selected depending on the purpose because the helical twist direction or helical period induced by the compound differs.
  • the chiral agent is not particularly limited, and known compounds (for example, liquid crystal device handbook, Chapter 3, Section 4-3, chiral agent for TN (twisted nematic), STN (Super Twisted Nematic), page 199, Japan Society for the Promotion of Science 142nd Committee, 1989), isosorbide, isomannide derivatives and the like can be used.
  • Chiral agents generally contain an asymmetric carbon atom, but axially chiral compounds or planar chiral compounds that do not contain an asymmetric carbon atom can also be used as chiral agents.
  • Examples of axially or planarly chiral compounds include binaphthyl, helicene, paracyclophane, and derivatives thereof.
  • the chiral agent may have a polymerizable group. When both the chiral agent and the liquid crystal compound have a polymerizable group, a repeating unit derived from the polymerizable liquid crystal compound and a repeating unit derived from the chiral agent are formed by the polymerization reaction of the polymerizable chiral agent and the polymerizable liquid crystal compound.
  • the polymerizable group possessed by the polymerizable chiral agent is preferably the same type of group as the polymerizable group possessed by the polymerizable liquid crystal compound. Therefore, the polymerizable group of the chiral agent is also preferably an unsaturated polymerizable group, an epoxy group or an aziridinyl group, more preferably an unsaturated polymerizable group, and an ethylenically unsaturated polymerizable group. More preferred. Also, the chiral agent may be a liquid crystal compound.
  • the chiral agent has a photoisomerizable group
  • the photoisomerizable group is preferably an isomerization site of a compound exhibiting photochromic properties, an azo group, an azoxy group, or a cinnamoyl group.
  • Specific compounds include JP-A-2002-080478, JP-A-2002-080851, JP-A-2002-179668, JP-A-2002-179669, JP-A-2002-179670, JP-A-2002- 179681, JP-A-2002-179682, JP-A-2002-338575, JP-A-2002-338668, JP-A-2003-313189, and compounds described in JP-A-2003-313292, etc. can be used.
  • the content of the chiral agent in the liquid crystal composition is preferably 0.01 to 200 mol%, more preferably 1 to 30 mol%, relative to the content molar amount of the liquid crystal compound.
  • the liquid crystal composition contains a polymerizable compound, it preferably contains a polymerization initiator.
  • the polymerization initiator used is preferably a photopolymerization initiator capable of initiating the polymerization reaction by ultraviolet irradiation.
  • photoinitiators include ⁇ -carbonyl compounds (described in US Pat. Nos. 2,367,661 and 2,367,670), acyloin ethers (described in US Pat. No. 2,448,828), ⁇ -hydrocarbons substituted aromatic acyloin compounds (described in US Pat. No.
  • the content of the photopolymerization initiator in the liquid crystal composition is preferably 0.1 to 20% by mass, more preferably 0.5 to 12% by mass, based on the content of the liquid crystal compound.
  • the liquid crystal composition may optionally contain a cross-linking agent in order to improve film strength and durability after curing.
  • a cross-linking agent one that is cured by ultraviolet rays, heat, humidity, and the like can be preferably used.
  • the cross-linking agent is not particularly limited and can be appropriately selected depending on the intended purpose.
  • polyfunctional acrylate compounds such as trimethylolpropane tri(meth)acrylate and pentaerythritol tri(meth)acrylate
  • epoxy compounds such as ethylene glycol diglycidyl ether
  • aziridine compounds such as 2,2-bishydroxymethylbutanol-tris[3-(1-aziridinyl)propionate] and 4,4-bis(ethyleneiminocarbonylamino)diphenylmethane
  • hexa isocyanate compounds such as methylene diisocyanate and biuret-type isocyanate
  • alkoxysilane compounds such as vinyltrimethoxysilane and N-(2-aminoethyl)3-aminopropyltrimethoxysilane, etc.
  • the content of the cross-linking agent is preferably 3 to 20% by mass, more preferably 5 to 15% by mass, based on the solid mass of the liquid crystal composition. When the content of the cross-linking agent is within the above range, the effect of improving the cross-linking density is likely to be obtained, and the stability of the cholesteric liquid crystal phase is further improved.
  • the liquid crystal composition may further contain polymerization inhibitors, antioxidants, ultraviolet absorbers, light stabilizers, colorants, metal oxide fine particles, etc., within a range that does not reduce the optical performance. can be added at
  • the liquid crystal composition is preferably used as a liquid when forming the cholesteric liquid crystal layer.
  • the liquid crystal composition may contain a solvent.
  • the solvent is not limited and can be appropriately selected according to the purpose, but organic solvents are preferred.
  • the organic solvent is not limited and can be appropriately selected depending on the purpose. Examples include ketones, alkyl halides, amides, sulfoxides, heterocyclic compounds, hydrocarbons, esters, and ethers. etc. These may be used individually by 1 type, and may use 2 or more types together. Among these, ketones are preferred in consideration of the load on the environment.
  • a liquid crystal composition is applied to the surface on which the cholesteric liquid crystal layer is to be formed, the liquid crystal compound is aligned in a cholesteric liquid crystal phase state, and then the liquid crystal compound is cured to form a cholesteric liquid crystal layer.
  • a liquid crystal composition is applied to the alignment film to align the liquid crystal compound in the state of the cholesteric liquid crystal phase, and then the liquid crystal compound is cured to form the cholesteric liquid crystal phase. is preferably formed by fixing the cholesteric liquid crystal layer.
  • the liquid crystal composition can be applied by printing methods such as inkjet and scroll printing, and known methods such as spin coating, bar coating and spray coating, which can uniformly apply the liquid to the sheet.
  • the applied liquid crystal composition is dried and/or heated as necessary, and then cured to form a cholesteric liquid crystal layer.
  • the liquid crystal compound in the liquid crystal composition may be oriented in the cholesteric liquid crystal phase.
  • the heating temperature is preferably 200° C. or lower, more preferably 130° C. or lower.
  • the aligned liquid crystal compound is further polymerized as necessary.
  • Polymerization may be either thermal polymerization or photopolymerization by light irradiation, but photopolymerization is preferred.
  • the irradiation energy is preferably 20 mJ/cm 2 to 50 J/cm 2 , more preferably 50 to 1500 mJ/cm 2 .
  • light irradiation may be performed under heating conditions or under a nitrogen atmosphere.
  • the wavelength of the ultraviolet rays to be irradiated is preferably 250 to 430 nm.
  • a composition containing a discotic liquid crystal compound is used to form an inclined liquid crystal layer in which the molecular axis of the discotic liquid crystal compound is inclined with respect to the surface.
  • a method of forming a cholesteric liquid crystal layer using a composition containing a liquid crystal compound is also preferably used.
  • a method for forming a cholesteric liquid crystal layer using such a tilted liquid crystal layer is described in paragraphs [0049] to [0194] of WO2019/181247.
  • the thickness of the cholesteric liquid crystal layer is not limited, and the thickness that can provide the necessary light reflectance is determined according to the light reflectance required for the cholesteric liquid crystal layer and the material used to form the cholesteric liquid crystal layer. can be set as appropriate.
  • Antireflection layer As the antireflection layer, a known antireflection film such as a dielectric film, an interference reflection film in which a high refractive index material and a low refractive index material are alternately laminated, and a moth-eye structure in which a shape is formed on the surface can be appropriately used.
  • a known antireflection film such as a dielectric film, an interference reflection film in which a high refractive index material and a low refractive index material are alternately laminated, and a moth-eye structure in which a shape is formed on the surface can be appropriately used.
  • a positive C-plate is defined as follows.
  • a positive C plate (positive C plate) is represented by the formula ( It satisfies the relationship C1).
  • a positive C plate has a negative Rth value.
  • Formula (C1) nx ⁇ ny ⁇ nz Note that the above “ ⁇ ” includes not only the case where both are completely the same, but also the case where both are substantially the same. “Substantially the same” means, for example, that (nx ⁇ ny) ⁇ d (where d is the thickness of the film) is ⁇ 10 nm to 10 nm, preferably ⁇ 5 nm to 5 nm, and “nx ⁇ ny”. include.
  • a positive C plate can be obtained by using a rod-shaped polymerizable liquid crystal compound and vertically aligning it (homeotropic alignment).
  • the descriptions in JP-A-2017-187732, JP-A-2016-53709, and JP-A-2015-200861 can be referred to.
  • compositions shown below were stirred and dissolved in a container kept at 70°C to prepare reflective layer coating solutions R-1 and R-2, respectively.
  • R represents a coating liquid using rod-like liquid crystal.
  • the numerical values are % by weight.
  • R is a group bonded with an oxygen atom.
  • the average molar extinction coefficient of the rod-shaped liquid crystal at a wavelength of 300 to 400 nm was 140/mol ⁇ cm.
  • Chiral agent A is a chiral agent whose helical twisting power (HTP) is reduced by light.
  • Coating solution for reflective layer D-1 The following compositions were stirred and dissolved in a container kept at 50° C. to prepare reflective layer coating solutions D-1 and D-2, respectively.
  • D represents a coating liquid using discotic liquid crystal.
  • a PET (polyethylene terephthalate) film (manufactured by Toyobo Co., Ltd., A4100) having a thickness of 50 ⁇ m was prepared as a temporary support. This PET film has an easily adhesive layer on one side.
  • the surface of the PET film having no easy adhesion layer was subjected to rubbing treatment, coated with the reflective layer coating liquid R-1 prepared above with a wire bar coater, and dried at 110° C. for 120 seconds. After that, in a low-oxygen atmosphere (100 ppm or less), at 100° C., by irradiating light from a metal halide lamp with an illuminance of 80 mW/cm 2 and an irradiation amount of 500 mJ/cm 2 , the red light composed of the cholesteric liquid crystal layer is cured. A reflective layer was formed. Light irradiation was performed from the cholesteric liquid crystal layer side in all cases. At this time, the coating thickness was adjusted so that the film thickness of the red light reflecting layer after curing was 4.5 ⁇ m.
  • the surface of the red light reflective layer was subjected to corona treatment at a discharge amount of 150 W ⁇ min/m 2 , and then the reflective layer coating solution D-1 was applied to the corona-treated surface using a wire bar coater. Subsequently, the coating film was dried at 70° C. for 2 minutes to evaporate the solvent, and then heat-aged at 115° C. for 3 minutes to obtain a uniform alignment state. Thereafter, this coating film is held at 45° C. and cured by irradiating ultraviolet rays (300 mJ/cm 2 ) using a metal halide lamp in a nitrogen atmosphere to form a yellow light reflecting layer on the red light reflecting layer. bottom. Light irradiation was performed from the cholesteric liquid crystal layer side in all cases. At this time, the coating thickness was adjusted so that the film thickness of the yellow light reflecting layer after curing was 3.3 ⁇ m.
  • the reflective layer coating liquid R-2 was applied onto the yellow light reflective layer with a wire bar coater and then dried at 110° C. for 120 seconds. After that, in a low oxygen atmosphere (100 ppm or less), at 100° C., by irradiating with light from a metal halide lamp with an illuminance of 80 mW and an irradiation amount of 500 mJ/cm 2 , the green light reflecting layer is formed on the yellow light reflecting layer. formed. Light irradiation was performed from the cholesteric liquid crystal layer side in all cases. At this time, the coating thickness was adjusted so that the film thickness of the green light reflecting layer after curing was 2.7 ⁇ m.
  • the surface of the green light reflective layer was subjected to corona treatment at a discharge amount of 150 W ⁇ min/m 2 , and then the reflective layer coating liquid D-2 was applied to the corona-treated surface using a wire bar coater. Subsequently, the coating film was dried at 70° C. for 2 minutes to evaporate the solvent, and then heat-aged at 115° C. for 3 minutes to obtain a uniform alignment state. After that, this coating film is held at 45° C. and cured by irradiating ultraviolet rays (300 mJ/cm 2 ) using a metal halide lamp in a nitrogen atmosphere to form a blue light reflecting layer on the green light reflecting layer. bottom. Light irradiation was performed from the cholesteric liquid crystal layer side in all cases. At this time, the coating thickness was adjusted so that the film thickness of the blue light reflecting layer after curing was 2.5 ⁇ m.
  • a reverse dispersion retardation layer 1 was produced by referring to the method described in paragraphs 0151 to 0163 of JP-A-2020-084070.
  • Matting agent solution ⁇ Silica particles with an average particle size of 20 nm (AEROSIL R972, manufactured by Nippon Aerosil Co., Ltd.) 2 parts by mass ⁇ Methylene chloride (first solvent) 76 parts by mass ⁇ Methanol (second solvent) 11 parts by mass Rate dope 1 part by mass ⁇
  • AEROSIL R972 manufactured by Nippon Aerosil Co., Ltd.
  • a coating solution S-PA-1 for forming an orientation layer which will be described later, was continuously applied onto the cellulose acylate film 1 with a wire bar.
  • the support on which the coating film was formed was dried with hot air at 140° C. for 120 seconds, and then the coating film was irradiated with polarized ultraviolet rays (10 mJ/cm 2 , using an ultra-high pressure mercury lamp) to form a photo-alignment layer.
  • PA1 was formed.
  • the film thickness was 0.3 ⁇ m.
  • ⁇ Formation of light absorption anisotropic layer P1> The following coating solution SP-1 for forming a light absorption anisotropic layer was continuously coated on the alignment layer PA1 obtained by using a wire bar. Next, the coating layer P1 was heated at 140° C. for 30 seconds and cooled to room temperature (23° C.). Then, it was heated at 90° C. for 60 seconds and cooled again to room temperature. After that, an anisotropic light absorption layer P1 was formed on the alignment layer PA1 by irradiating for 2 seconds under irradiation conditions of an illuminance of 200 mW/cm 2 using an LED lamp (center wavelength 365 nm). The film thickness was 1.6 ⁇ m.
  • composition of Coating Liquid SP-1 for Forming Light Absorption Anisotropic Layer ⁇ ⁇ 0.25 parts by mass of the following dichroic substance D-1 ⁇ 0.36 parts by mass of the following dichroic substance D-2 ⁇ 0.59 parts by mass of the following dichroic substance D-3 ⁇
  • the following polymer liquid crystalline compound M -P-1 2.21 parts by mass Low-molecular-weight liquid crystalline compound M-1 1.36 parts by mass Polymerization initiator IRGACURE OXE-02 (manufactured by BASF) 0.200 parts by mass Surfactant F3 below 0.2 parts by mass 026 parts by mass Cyclopentanone 46.00 parts by mass Tetrahydrofuran 46.00 parts by mass Benzyl alcohol 3.00 parts by mass ⁇ ⁇
  • Example 1 A virtual reality display device “Oculus Quset” manufactured by Facebook was disassembled, and an image display panel was taken out.
  • This image display panel is an organic EL display panel, and the ⁇ /4 retardation layer and the absorbing linear polarizer attached to the surface are peeled off.
  • the prepared retardation layer 1, absorptive linear polarizer, retardation layer 1, and positive C plate 1 are attached to Lintec's adhesive sheet "NCF-D692 (5)". was used to laminate in this order.
  • the retardation 1, the absorbing linear polarizer, and the positive C plate 1 were laminated, the respective temporary supports were peeled off and removed.
  • the image display panel 1 thus obtained emitted right-handed circularly polarized light.
  • a glass plano-convex lens having a diameter of 50 mm and a curvature radius of a curved surface portion of 50 mm was prepared, and the produced reflective circular polarizer 1 was formed on the curved surface portion of the plano-convex lens.
  • the curved surface of the reflective circular polarizer 1 was formed by attaching a Lintec adhesive sheet "NCF-D692 (5)" to the bonding surface of the reflective circular polarizer 1 and peeling off the separator film of the adhesive sheet. In this state, vacuum forming was performed by the method described in JP-A-2012-116094. The molding temperature was 110°C.
  • a plano-convex lens 1 was produced.
  • the focal length of the reflective circular polarizer 1 as a concave mirror was 19 mm at a wavelength of 588 nm.
  • a PMMA half mirror is prepared, and a retardation layer 1 and an absorbing linear polarizer are attached to the surface opposite to the reflecting surface of the half mirror. It was laminated using Thus, the half mirror 1 was produced.
  • a plano-convex lens 1 and a half mirror 1 were laminated in this order on the produced image display panel 1 to produce a virtual reality display device of Example 1.
  • FIG. In the virtual reality display device thus produced the distance from the image display panel 1 to the half mirror 1 was approximately 10 mm.
  • Example 2 On the surface of the positive C plate 1 and the plane part of the plano-convex lens 1, an antireflection film "AR100” manufactured by Dexerials was pasted using an adhesive sheet "NCF-D692 (5)” manufactured by Lintec.
  • a virtual reality display device of Example 2 was produced in the same manner as in Example 1 except that the display panel 2 and the plano-convex lens 2 were used.
  • Example 3 A reflective circular polarizer, a retardation layer 1, an absorptive polarizer, and a retardation layer 1 are formed in this order on the curved surface portion of the plano-convex lens similar to that used in Example 1, and further, on the flat portion , and an antireflection film “AR100” manufactured by Dexerials Co., Ltd. was laminated to prepare a plano-convex lens 3 .
  • the same vacuum forming method as in Example 1 was used to form the reflective circular polarizer, the retardation layer 1, and the absorptive polarizer.
  • a virtual reality display device of Example 3 was produced in the same manner as in Example 1, except that the plano-convex lens 1 was replaced with a plano-convex lens 3 .
  • a retardation layer 1, a reflective linear polarizer “APF” manufactured by 3M Co., Ltd., and a retardation layer 1 were formed in this order on the curved surface portion of a plano-convex lens similar to that used in Example 1.
  • the retardation layer 1 and the APF were molded by the same vacuum molding method as that for the reflective circular polarizer.
  • an antireflection film "AR100” manufactured by Dexerials Co., Ltd. was adhered to the planar portion of the plano-convex lens using an adhesive sheet "NCF-D692 (5)" manufactured by Lintec Co., Ltd.
  • a virtual reality display device of Comparative Example 1 was produced in the same manner as in Example 2, except that the plano-convex lens 2 was replaced with a plano-convex lens 4 (see FIG. 5).
  • Example 4 A plano-convex lens 5 was produced in the same manner as in Example 1, except that the radius of curvature of the plano-convex lens was changed to 80 mm.
  • a virtual reality display device of Example 4 was produced in the same manner as in Example 1 except that the plano-convex lens 1 was replaced with a plano-convex lens 5 .
  • the focal length of the reflective circular polarizer 1 as a concave mirror was 39 mm at a wavelength of 588 nm. In the virtual reality display device thus produced, the distance from the image display panel 1 to the half mirror 1 was approximately 18 mm.
  • a plano-convex lens 6 was produced in the same manner as in Comparative Example 1, except that the radius of curvature of the plano-convex lens was changed to 80 mm.
  • a virtual reality display device of Comparative Example 4 was produced in the same manner as in Comparative Example 1 except that the plano-convex lens 4 was replaced with a plano-convex lens 6 .
  • the focal length of the reflective circular polarizer 1 as a concave mirror was 39 mm at a wavelength of 588 nm. In the virtual reality display device thus produced, the distance from the image display panel 2 to the half mirror 1 was approximately 18 mm.
  • the virtual reality display device of the present invention effectively reduced leaked light and suppressed the occurrence of double images and deterioration of contrast compared to the comparative example.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025013565A1 (ja) * 2023-07-10 2025-01-16 富士フイルム株式会社 レンズ、画像表示装置、および仮想現実表示装置
JP2025087847A (ja) * 2023-11-10 2025-06-10 京セラ株式会社 表示装置、結像装置、表示システムおよび車両
WO2025118327A1 (zh) * 2023-12-08 2025-06-12 业桓科技(成都)有限公司 透镜组及近眼显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11237584A (ja) * 1997-12-19 1999-08-31 Sharp Corp 画像表示装置、該画像表示装置を用いた頭部装着型ディスプレイ及び映像通信装置
WO2019131950A1 (ja) * 2017-12-27 2019-07-04 富士フイルム株式会社 光学素子およびセンサー
US10890776B1 (en) * 2019-02-19 2021-01-12 Facebook Technologies, Llc Pancake lens ghosting mitigation
US20210036264A1 (en) * 2019-07-31 2021-02-04 Beijing Boe Display Technology Co., Ltd. Optical film group, display assembly and display device
WO2021200428A1 (ja) * 2020-04-01 2021-10-07 富士フイルム株式会社 光学素子、画像表示ユニットおよびヘッドマウントディスプレイ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11237584A (ja) * 1997-12-19 1999-08-31 Sharp Corp 画像表示装置、該画像表示装置を用いた頭部装着型ディスプレイ及び映像通信装置
WO2019131950A1 (ja) * 2017-12-27 2019-07-04 富士フイルム株式会社 光学素子およびセンサー
US10890776B1 (en) * 2019-02-19 2021-01-12 Facebook Technologies, Llc Pancake lens ghosting mitigation
US20210036264A1 (en) * 2019-07-31 2021-02-04 Beijing Boe Display Technology Co., Ltd. Optical film group, display assembly and display device
WO2021200428A1 (ja) * 2020-04-01 2021-10-07 富士フイルム株式会社 光学素子、画像表示ユニットおよびヘッドマウントディスプレイ

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025013565A1 (ja) * 2023-07-10 2025-01-16 富士フイルム株式会社 レンズ、画像表示装置、および仮想現実表示装置
JP2025087847A (ja) * 2023-11-10 2025-06-10 京セラ株式会社 表示装置、結像装置、表示システムおよび車両
JP2025090675A (ja) * 2023-11-10 2025-06-17 京セラ株式会社 表示装置、結像装置、表示システムおよび車両
WO2025118327A1 (zh) * 2023-12-08 2025-06-12 业桓科技(成都)有限公司 透镜组及近眼显示装置

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