WO2023176362A1 - Système d'affichage, procédé d'affichage, corps d'affichage et procédé de fabrication de corps d'affichage - Google Patents

Système d'affichage, procédé d'affichage, corps d'affichage et procédé de fabrication de corps d'affichage Download PDF

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Publication number
WO2023176362A1
WO2023176362A1 PCT/JP2023/006730 JP2023006730W WO2023176362A1 WO 2023176362 A1 WO2023176362 A1 WO 2023176362A1 JP 2023006730 W JP2023006730 W JP 2023006730W WO 2023176362 A1 WO2023176362 A1 WO 2023176362A1
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Prior art keywords
display
display element
reflection
display system
light
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PCT/JP2023/006730
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English (en)
Japanese (ja)
Inventor
周作 後藤
大輔 林
丈治 喜多川
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日東電工株式会社
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Priority claimed from JP2022077658A external-priority patent/JP2023166840A/ja
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Publication of WO2023176362A1 publication Critical patent/WO2023176362A1/fr

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    • 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

Definitions

  • the present invention relates to a display system, a display method, a display body, and a method for manufacturing a display body.
  • Image display devices represented by liquid crystal display devices and electroluminescence (EL) display devices are rapidly becoming popular.
  • EL electroluminescence
  • optical members such as polarizing members and retardation members are generally used to realize image display and improve image display performance (see, for example, Patent Document 1).
  • VR goggles with a display for realizing Virtual Reality (VR) are beginning to be commercialized. Since VR goggles are being considered for use in a variety of situations, it is desired that they be lighter and have higher definition. Weight reduction can be achieved, for example, by making the lenses used in VR goggles thinner. On the other hand, there is also a desire for the development of optical members suitable for display systems using thin lenses.
  • the main purpose of the present invention is to provide a display system that can reduce the weight and increase the definition of VR goggles.
  • a display system that displays images to a user, a display element having a display surface that emits light representing an image forward through a polarizing member; a reflecting section disposed in front of the display element, including a reflective polarizing member, and reflecting light emitted from the display element; a first lens section disposed on an optical path between the display element and the reflection section; a half mirror disposed between the display element and the first lens part, which transmits the light emitted from the display element and reflects the light reflected by the reflection part toward the reflection part; a first ⁇ /4 member disposed on an optical path between the display element and the half mirror; a second ⁇ /4 member disposed on the optical path between the half mirror and the reflecting section; Equipped with A display system, wherein the slow axis of the first ⁇ /4 member and the slow axis of the second ⁇ /4 member are arranged to be substantially orthogonal to each other.
  • the following display methods [8] to [9] are provided.
  • [8] Passing the light representing the image emitted through the polarizing member through the first ⁇ /4 member; a step of causing the light that has passed through the first ⁇ /4 member to pass through a half mirror and a first lens portion; passing the light that has passed through the half mirror and the first lens section through a second ⁇ /4 member; a step of reflecting the light that has passed through the second ⁇ /4 member toward the half mirror by a reflecting section including a reflective polarizing member; a step of allowing the light reflected by the reflection part and the half mirror to be transmitted through the reflection part by the second ⁇ /4 member;
  • the slow axis of the first ⁇ /4 member and the slow axis of the second ⁇ /4 member are arranged to be substantially perpendicular to each other; Display method. [9] The display method according to [8], wherein the polarization direction of the light emitted through the polarizing member and the reflection axis of the reflective
  • a display body comprising the display system according to any one of [1] to [7] above.
  • a method for manufacturing a display body comprising the display system according to any one of [1] to [7] above.
  • FIG. 1 is a schematic diagram showing a general configuration of a display system according to one embodiment of the present invention.
  • FIG. 2 is a schematic diagram illustrating the progression and polarization state of light in a display system according to an embodiment of the present invention.
  • Refractive index (nx, ny, nz) "nx" is the refractive index in the direction in which the in-plane refractive index is maximum (i.e., slow axis direction), and "ny” is the direction perpendicular to the slow axis in the plane (i.e., fast axis direction) "nz” is the refractive index in the thickness direction.
  • Refractive index (nx, ny, nz) "nx" is the refractive index in the direction in which the in-plane refractive index is maximum (i.e., slow axis direction), and "ny” is the direction perpendicular to the slow axis in the plane (i.e., fast axis direction) "nz” is the refractive index in the thickness direction.
  • In-plane phase difference (Re) "Re( ⁇ )” is an in-plane retardation measured with light having a wavelength of ⁇ nm at 23°C.
  • Re(550) is an in-plane retardation measured with light having a wavelength of 550 nm at 23°C.
  • Phase difference in thickness direction (Rth) is a retardation in the thickness direction measured with light having a wavelength of ⁇ nm at 23°C.
  • Rth (550) is the retardation in the thickness direction measured with light having a wavelength of 550 nm at 23°C.
  • FIG. 1 is a schematic diagram showing the general configuration of a display system according to one embodiment of the present invention.
  • FIG. 1 schematically shows the arrangement, shape, etc. of each component of the display system 2.
  • the display system 2 includes a display element 12, a reflection section 14 including a reflective polarizing member, a first lens section 16, a half mirror 18, a first retardation member 20, a second retardation member 22, and a second retardation member 22. It is equipped with two lens parts 24.
  • the reflecting section 14 is disposed at the front of the display element 12 on the display surface 12a side, and can reflect light emitted from the display element 12.
  • the first lens section 16 is arranged on the optical path between the display element 12 and the reflection section 14, and the half mirror 18 is arranged between the display element 12 and the first lens section 16.
  • the first retardation member 20 is arranged on the optical path between the display element 12 and the half mirror 18, and the second retardation member 22 is arranged on the optical path between the half mirror 18 and the reflection section 14.
  • lens section The components disposed in front of the half mirror (in the illustrated example, the half mirror 18, the first lens section 16, the second retardation member 22, the reflection section 14, and the second lens section 24) are collectively called a lens section (lens section). 4).
  • the display element 12 is, for example, a liquid crystal display or an organic EL display, and has a display surface 12a for displaying images.
  • the light emitted from the display surface 12a passes through a polarizing member (typically, a polarizing film) that may be included in the display element 12, and is emitted as first linearly polarized light.
  • a polarizing member typically, a polarizing film
  • the first retardation member 20 is a ⁇ /4 member that can convert the first linearly polarized light incident on the first retardation member 20 into first circularly polarized light (hereinafter, the first retardation member is referred to as the first (sometimes referred to as a ⁇ /4 member). Note that the first retardation member 20 may be provided integrally with the display element 12.
  • the in-plane retardation Re (550) of the first retardation member 20 is, for example, 100 nm to 190 nm, may be 110 nm to 180 nm, may be 130 nm to 160 nm, or may be 135 nm to 155 nm. .
  • the first retardation member 20 preferably exhibits inverse dispersion wavelength characteristics in which the retardation value increases depending on the wavelength of the measurement light.
  • Re(450)/Re(550) of the first retardation member 20 is, for example, less than 1 and may be 0.95 or less, further less than 0.90, and even 0.85 or less. good.
  • Re(450)/Re(550) of the first retardation member 20 is, for example, 0.75 or more.
  • the first retardation member 20 has Re(400)/Re(550) ⁇ 0.85, Re(650)/Re(550)>1.03, and Re(750)/Re( 550)>1.05.
  • the first retardation member 20 has 0.65 ⁇ Re(400)/Re(550) ⁇ 0.80 (preferably 0.7 ⁇ Re(400)/Re(550) ⁇ 0.75), 1. 0 ⁇ Re(650)/Re(550) ⁇ 1.25 (preferably 1.05 ⁇ Re(650)/Re(550) ⁇ 1.20) and 1.05 ⁇ Re(750)/Re( 550) ⁇ 1.40 (preferably 1.08 ⁇ Re(750)/Re(550) ⁇ 1.36), more preferably at least two. More preferably, all of them are satisfied.
  • the first retardation member 20 preferably exhibits a refractive index characteristic of nx>ny ⁇ nz.
  • the Nz coefficient of the first retardation member 20 is preferably 0.9 to 3, more preferably 0.9 to 2.5, even more preferably 0.9 to 1.5, particularly preferably 0.9 to 1. It is 3.
  • the first retardation member 20 is formed of any suitable material that can satisfy the above characteristics.
  • the first retardation member 20 may be, for example, a stretched resin film or an oriented solidified layer of a liquid crystal compound.
  • the resins contained in the above resin film include polycarbonate resin, polyester carbonate resin, polyester resin, polyvinyl acetal resin, polyarylate resin, cyclic olefin resin, cellulose resin, polyvinyl alcohol resin, and polyamide resin. , polyimide resin, polyether resin, polystyrene resin, acrylic resin, and the like. These resins may be used alone or in combination (for example, blended or copolymerized).
  • a resin film containing a polycarbonate resin or a polyester carbonate resin hereinafter sometimes simply referred to as a polycarbonate resin
  • polycarbonate resins contain structural units derived from fluorene-based dihydroxy compounds, structural units derived from isosorbide-based dihydroxy compounds, alicyclic diols, alicyclic dimethanols, di-, tri-, or polyethylene glycols, and alkylene-based dihydroxy compounds. a structural unit derived from at least one dihydroxy compound selected from the group consisting of glycol or spiroglycol.
  • the polycarbonate resin contains a structural unit derived from a fluorene dihydroxy compound, a structural unit derived from an isosorbide dihydroxy compound, a structural unit derived from an alicyclic dimethanol, and/or a di, tri, or polyethylene glycol. More preferably, it contains a structural unit derived from a fluorene dihydroxy compound, a structural unit derived from an isosorbide dihydroxy compound, and a structural unit derived from di, tri or polyethylene glycol. .
  • the polycarbonate resin may contain structural units derived from other dihydroxy compounds as necessary.
  • the thickness of the first retardation member 20 made of a stretched resin film is, for example, 10 ⁇ m to 100 ⁇ m, preferably 10 ⁇ m to 70 ⁇ m, more preferably 10 ⁇ m to 40 ⁇ m, and still more preferably 20 ⁇ m to 30 ⁇ m.
  • the liquid crystal compound alignment and solidification layer is a layer in which the liquid crystal compound is aligned in a predetermined direction within the layer, and the alignment state is fixed.
  • the "alignment hardened layer” is a concept that includes an orientation hardened layer obtained by curing a liquid crystal monomer as described below.
  • rod-shaped liquid crystal compounds are typically aligned in the slow axis direction of the first retardation member (homogeneous alignment). Examples of rod-shaped liquid crystal compounds include liquid crystal polymers and liquid crystal monomers.
  • the liquid crystal compound is preferably polymerizable. If the liquid crystal compound is polymerizable, the alignment state of the liquid crystal compound can be fixed by aligning the liquid crystal compound and then polymerizing it.
  • the liquid crystal compound alignment and solidification layer is produced by subjecting the surface of a predetermined base material to an alignment treatment, applying a coating liquid containing the liquid crystal compound to the surface, and subjecting the liquid crystal compound to the alignment treatment. It can be formed by orienting it in a corresponding direction and fixing the orientation state. Any suitable orientation treatment may be employed as the orientation treatment. Specifically, mechanical alignment treatment, physical alignment treatment, and chemical alignment treatment can be mentioned. Specific examples of mechanical alignment treatment include rubbing treatment and stretching treatment. Specific examples of physical alignment treatment include magnetic field alignment treatment and electric field alignment treatment. Specific examples of chemical alignment treatment include oblique vapor deposition and photo alignment treatment. As the treatment conditions for various orientation treatments, any appropriate conditions may be adopted depending on the purpose.
  • the alignment of the liquid crystal compound is carried out by treatment at a temperature that exhibits a liquid crystal phase depending on the type of liquid crystal compound.
  • the liquid crystal compound assumes a liquid crystal state, and the liquid crystal compound is oriented in accordance with the orientation treatment direction of the substrate surface.
  • the alignment state is fixed by cooling the liquid crystal compound aligned as described above.
  • the alignment state is fixed by subjecting the liquid crystal compound aligned as described above to polymerization treatment or crosslinking treatment.
  • liquid crystal compound any suitable liquid crystal polymer and/or liquid crystal monomer can be used as the liquid crystal compound.
  • the liquid crystal polymer and the liquid crystal monomer may be used alone or in combination.
  • Specific examples of liquid crystal compounds and methods for producing liquid crystal alignment solidified layers are described in, for example, JP 2006-163343A, JP 2006-178389A, and WO 2018/123551A. The descriptions of these publications are incorporated herein by reference.
  • the thickness of the first retardation member 20 composed of the liquid crystal alignment solidified layer is, for example, 1 ⁇ m to 10 ⁇ m, preferably 1 ⁇ m to 8 ⁇ m, more preferably 1 ⁇ m to 6 ⁇ m, and still more preferably 1 ⁇ m to 4 ⁇ m.
  • the half mirror 18 transmits the light emitted from the display element 12 and reflects the light reflected by the reflection section 14 toward the reflection section 14 .
  • the half mirror 18 is provided integrally with the first lens section 16.
  • the second retardation member 22 is a ⁇ /4 member that can transmit the light reflected by the reflection part 14 and the half mirror 18 through the reflection part 14 including a reflective polarizing member (hereinafter referred to as the second retardation member). (sometimes referred to as the second ⁇ /4 member). Note that the second retardation member 22 may be provided integrally with the first lens portion 16.
  • the in-plane retardation Re (550) of the second retardation member 22 is, for example, 100 nm to 190 nm, may be 110 nm to 180 nm, may be 130 nm to 160 nm, or may be 135 nm to 155 nm. .
  • the second retardation member 22 preferably exhibits inverse dispersion wavelength characteristics in which the retardation value increases depending on the wavelength of the measurement light.
  • Re(450)/Re(550) of the second retardation member 22 is, for example, less than 1 and may be 0.95 or less, further less than 0.90, and even 0.85 or less. good.
  • Re(450)/Re(550) of the second retardation member 22 is, for example, 0.75 or more.
  • the second retardation member 22 has Re(400)/Re(550) ⁇ 0.85, Re(650)/Re(550)>1.03, and Re(750)/Re( 550)>1.05.
  • the second retardation member 22 has 0.65 ⁇ Re(400)/Re(550) ⁇ 0.80 (preferably 0.7 ⁇ Re(400)/Re(550) ⁇ 0.75), 1. 0 ⁇ Re(650)/Re(550) ⁇ 1.25 (preferably 1.05 ⁇ Re(650)/Re(550) ⁇ 1.20) and 1.05 ⁇ Re(750)/Re( 550) ⁇ 1.40 (preferably 1.08 ⁇ Re(750)/Re(550) ⁇ 1.36), more preferably at least two. More preferably, all of them are satisfied.
  • the second retardation member 22 preferably exhibits a refractive index characteristic of nx>ny ⁇ nz.
  • the Nz coefficient of the second retardation member 22 is preferably 0.9 to 3, more preferably 0.9 to 2.5, even more preferably 0.9 to 1.5, particularly preferably 0.9 to 1. It is 3.
  • the second retardation member 22 is formed of any suitable material that can satisfy the above characteristics.
  • the second retardation member 22 may be, for example, a stretched resin film or an oriented solidified layer of a liquid crystal compound.
  • the same explanation as for the first retardation member 20 can be applied to the second retardation member 22 made of a stretched resin film or an oriented solidified layer of a liquid crystal compound.
  • the first retardation member 20 and the second retardation member 22 may have the same configuration (forming material, thickness, optical properties, etc.), or may have different configurations.
  • the reflecting section 14 may include an absorption type polarizing member (typically, an absorption type polarizing film).
  • the absorptive polarizing member may be placed in front of the reflective polarizing member (on the side closer to the eyes).
  • the reflection axis of the reflective polarizing member and the absorption axis of the absorptive polarizing member may be arranged substantially parallel to each other.
  • the reflective polarizing member and the absorptive polarizing member may be laminated with an adhesive layer interposed therebetween, and the reflective section 14 may include a laminate having the reflective polarizing member and the absorbing polarizing member.
  • the reflective polarizing member can transmit polarized light parallel to its transmission axis (typically, linearly polarized light) while maintaining its polarized state, and can reflect light in other polarized states.
  • the cross transmittance (Tc) of the reflective polarizing member may be, for example, 0.01% to 3%.
  • the single transmittance (Ts) of the reflective polarizing member may be, for example, 43% to 49%, preferably 45 to 47%.
  • the degree of polarization (P) of the reflective polarizing member may be, for example, 92% to 99.99%.
  • the reflective polarizing member is typically composed of a film having a multilayer structure (sometimes referred to as a reflective polarizing film).
  • the absorption type polarizing member is typically composed of a resin film (sometimes referred to as an absorption type polarizing film) containing a dichroic substance.
  • the slow axis of the first phase difference member 20 and the slow axis of the second phase difference member 22 are arranged substantially perpendicular to each other.
  • the absorption axis of the polarizing member included in the display element 12 and the reflection axis of the reflective polarizing member included in the reflecting section 14 may be arranged substantially perpendicular to each other (in other words, the polarizing member included in the display element 12 (The polarization direction of the light emitted through the reflection part 14 and the reflection axis of the reflective polarization member included in the reflection part 14 may be substantially parallel to each other.)
  • the angle between the absorption axis of the polarizing member included in the display element 12 and the slow axis of the first retardation member 20 is, for example, 40° to 50°, may be 42° to 48°, and is about 45°.
  • the angle between the absorption axis of the polarizing member included in the display element 12 and the slow axis of the second retardation member 22 is, for example, 40° to 50°, may be 42° to 48°, and is about 45°. It may be °.
  • FIG. 2(a) is a schematic diagram illustrating the progression of light in the display system
  • FIG. 2(b) is a diagram illustrating the progress of light in the display system as it passes through each member or is reflected by each member.
  • FIG. 3 is a schematic diagram illustrating changes in polarization state.
  • the solid arrows attached to the display element 12 indicate the absorption axis direction of the polarizing member included in the display element 12
  • the arrows attached to the first retardation member 20 and the second retardation member 22 indicate the direction of the absorption axis of the polarizing member included in the display element 12.
  • the solid-line arrows attached to the reflective polarizing member 14a included in the reflecting section 14 indicate the phase axis direction
  • the dotted-line arrows indicate the transmission axis direction of each polarizing member.
  • the light L emitted from the display element 12 as first linearly polarized light via the polarizing member is converted into first circularly polarized light by the first ⁇ /4 member 20.
  • the first circularly polarized light passes through the half mirror 18 and the first lens section 16 (not shown in FIG. 2), and is passed through the second ⁇ /4 member 22 to form the first circularly polarized light whose polarization direction is parallel to that of the first linearly polarized light. It is converted into linearly polarized light of 2.
  • the polarization direction of the second linearly polarized light is in the same direction (substantially parallel) as the reflection axis of the reflective polarizing member 14a included in the reflection section 14. Therefore, the second linearly polarized light incident on the reflection section 14 is reflected toward the half mirror 18 by the reflective polarizing member 14a.
  • the second linearly polarized light reflected by the reflecting section 14 is converted into second circularly polarized light by the second ⁇ /4 member 22.
  • the rotation direction of the second circularly polarized light is the same as the rotation direction of the first circularly polarized light.
  • the second circularly polarized light emitted from the second ⁇ /4 member 22 passes through the first lens section 16 and is reflected by the half mirror 18, forming a third circle that rotates in the opposite direction to the second circularly polarized light. converted into polarized light.
  • the third circularly polarized light reflected by the half mirror 18 passes through the first lens section 16 and is converted into third linearly polarized light by the second ⁇ /4 member 22.
  • the polarization direction of the third linearly polarized light is orthogonal to the polarization direction of the second linearly polarized light, and is in the same direction (substantially parallel) as the transmission axis of the reflective polarizing member 14a. Therefore, the third linearly polarized light can be transmitted through the reflective polarizing member 14a. Further, although not shown, when the reflective section includes an absorption type polarizing member, the absorption axis thereof is arranged to be approximately parallel to the reflection axis of the reflective polarizing member 14a, so that the light transmitted through the reflective polarizing member 14a is The third linearly polarized light can pass through the absorptive polarizing member as it is.
  • the light that has passed through the reflection section 14 passes through the second lens section 24 and enters the user's eyes 26 .
  • the slow axes of the first retardation member 20 and the second retardation member 22 are counterclockwise with respect to the absorption axis of the polarizing member included in the display element 12. are arranged at an angle of 45° clockwise and 45° clockwise, but they are also arranged at an angle of 45° clockwise and 45° counterclockwise. Similar explanations as above apply.
  • test and evaluation methods in Examples and the like are as follows.
  • parts when it is written as “parts”, it means “parts by weight” unless there are special notes, and when it is written as “%”, it means “wt%” unless there are special notes.
  • Thickness The thickness of 10 ⁇ m or less was measured using a scanning electron microscope (manufactured by JEOL Ltd., product name “JSM-7100F”). Thickness exceeding 10 ⁇ m was measured using a digital micrometer (manufactured by Anritsu Corporation, product name “KC-351C”).
  • In-plane phase difference Re( ⁇ ) A sample was prepared by cutting out the central part and both ends of the ⁇ /4 member in the width direction into a square having a width of 50 mm and a length of 50 mm, with one side parallel to the width direction of the member. The in-plane retardation of this sample at each wavelength at 23° C.
  • polyester carbonate resin was vacuum-dried at 80°C for 5 hours, and then put into a single-screw extruder (manufactured by Toshiba Machine Co., Ltd., cylinder temperature setting: 250°C) and a T-die (width 200mm, setting temperature: 250°C).
  • a long resin film with a thickness of 130 ⁇ m was produced using a film forming apparatus equipped with a chill roll (set temperature: 120 to 130° C.), a winder, and a winder.
  • the obtained long resin film was stretched in the width direction at a stretching temperature of 140° C. and a stretching ratio of 2.7 times.
  • a retardation film ( ⁇ /4 member) having a thickness of 47 ⁇ m, a Re(590) of 143 nm, and an Nz coefficient of 1.2 was obtained.
  • Re(450)/Re(550) of the ⁇ /4 member was 0.856.
  • Example 1 Two rectangular film pieces were cut out from the long retardation film obtained in Production Example 1 to form ⁇ /4 member 1 and ⁇ /4 member 2.
  • ⁇ /4 member 1 and ⁇ /4 member 2 are pasted together via an acrylic adhesive layer (manufactured by Nitto Denko Corporation, thickness 5 ⁇ m) so that the slow axis directions are perpendicular to each other, and the ⁇ /4 member 2 side is A reflective surface of a reflective polarizing film (manufactured by Nitto Denko, product name "APCFG4") was bonded to the film through an acrylic adhesive layer (manufactured by Nitto Denko, thickness 5 ⁇ m).
  • an acrylic adhesive layer manufactured by Nitto Denko, product name "APCFG4"
  • a laminate 1 having a configuration of [ ⁇ /4 member 1/ ⁇ /4 member 2/reflective polarizing film] was obtained.
  • the axial relationship of each member when the laminate 1 is viewed from the ⁇ /4 member 1 side is such that the slow axis direction of the ⁇ /4 member 1 is counterclockwise with the reflection axis direction of the reflective polarizing film being 0°.
  • the direction was 45 degrees, and the slow axis direction of the ⁇ /4 member 2 was 45 degrees clockwise.
  • Incident light that is linearly polarized light is converted into circularly polarized light by passing through ⁇ /4 member 1, and then converted into a straight line whose polarization direction is the same as the polarization direction of the incident light by passing through ⁇ /4 member 2.
  • the reflection axis of the reflective polarizing film As a result of being converted into polarized light, it is reflected by the reflection axis of the reflective polarizing film.
  • the light reflected by the reflection axis of the reflective polarizing film passes through the transmission axis of the reflective polarizing film after being re-reflected by a half mirror and is visually recognized by the user.
  • Light transmitted through the reflection axis of the reflective polarizing film due to reflection leakage may be visually recognized by the user as an afterimage (ghost).
  • the transmittance measurement of the laminate 1 is an evaluation model for reflection leakage of the reflective polarizing film in the display system according to the embodiment of the present invention, and it is evaluated that the smaller the transmittance is, the more afterimages (ghosts) can be suppressed. be able to.
  • Example 1 A laminate C1 having a configuration of [ ⁇ /4 member 1/ ⁇ /4 member 2/reflective polarizing film] was obtained in the same manner as in Example 1 except that the axial relationship of each member was changed. Specifically, when the laminate C1 is viewed from the ⁇ /4 member 1 side, the axial relationship of each member is the same as that of the ⁇ /4 member 1, with the direction orthogonal to the reflection axis direction of the reflective polarizing film being 0°. The slow axis direction and the slow axis direction of the ⁇ /4 member 2 were both 45 degrees counterclockwise, and the reflection axis direction of the reflective polarizing film was 90 degrees.
  • Incident light which is linearly polarized light, is converted into circularly polarized light by passing through ⁇ /4 member 1, and then converted into linearly polarized light whose polarization direction is orthogonal to the polarization direction of the incident light by passing through ⁇ /4 member 2.
  • the transmittance measurement of the laminate C1 is performed according to the embodiment of the present invention in that the first ⁇ /4 member and the second ⁇ /4 member are arranged such that their slow axes are parallel to each other.
  • Table 1 shows the axis angles of each member in the laminate when the polarization direction of the incident light is set to 0° when measuring the reflection axis transmittance.
  • Table 2 shows the single transmittance Ts and reflective axis transmittance k2 of the laminate obtained in Example 1 or Comparative Example 1 and the reflective polarizing film (manufactured by Nitto Denko Corporation, product name "APCFG4") as Reference Example 1. .
  • the first ⁇ /4 member and the second ⁇ /4 member are arranged such that their slow axes are orthogonal to each other. By doing so, it is possible to suppress reflection leakage at the reflection axis of the reflective polarizing film, compared to a configuration in which the slow axes are arranged parallel to each other.
  • the present invention is not limited to the above embodiments, and various modifications are possible.
  • it can be replaced with a configuration that is substantially the same as the configuration shown in the above embodiment, a configuration that has the same effect, or a configuration that can achieve the same objective.
  • the display system according to the embodiment of the present invention can be used for a display body such as VR goggles, for example.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Polarising Elements (AREA)

Abstract

La présente invention concerne un système d'affichage qui peut obtenir un poids plus léger et une plus grande définition dans des lunettes VR, le système d'affichage comprenant : un élément d'affichage qui a une surface d'affichage qui émet, dans la direction avant, une lumière représentant une image à travers un élément de polarisation ; une unité de réflexion qui est disposée devant l'élément d'affichage, comprend un élément de polarisation de type à réflexion, et réfléchit la lumière émise par l'élément d'affichage ; une première unité de lentille qui est disposée sur le trajet optique entre l'élément d'affichage et l'unité de réflexion ; un demi-miroir qui est disposé entre l'élément d'affichage et la première unité de lentille, permet la transmission de la lumière émise par l'élément d'affichage, et réfléchit la lumière réfléchie par l'unité de réflexion vers l'unité de réflexion ; un premier élément λ/4 qui est disposé sur le trajet optique entre l'élément d'affichage et le demi-miroir ; et un second élément λ/4 qui est disposé sur le trajet optique entre le demi-miroir et l'unité de réflexion, l'axe lent du premier nombre λ/4 et l'axe lent du second élément λ/4 étant agencés de façon à être sensiblement orthogonaux l'un par rapport à l'autre.
PCT/JP2023/006730 2022-03-14 2023-02-24 Système d'affichage, procédé d'affichage, corps d'affichage et procédé de fabrication de corps d'affichage WO2023176362A1 (fr)

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JP2022039286 2022-03-14
JP2022-039285 2022-03-14
JP2022-039286 2022-03-14
JP2022039285 2022-03-14
JP2022-077658 2022-05-10
JP2022077658A JP2023166840A (ja) 2022-05-10 2022-05-10 表示システム、表示方法、表示体および表示体の製造方法

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