WO2023153197A1 - Mirror unit, virtual image display device, and mirror unit production method - Google Patents

Mirror unit, virtual image display device, and mirror unit production method Download PDF

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Publication number
WO2023153197A1
WO2023153197A1 PCT/JP2023/002105 JP2023002105W WO2023153197A1 WO 2023153197 A1 WO2023153197 A1 WO 2023153197A1 JP 2023002105 W JP2023002105 W JP 2023002105W WO 2023153197 A1 WO2023153197 A1 WO 2023153197A1
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WIPO (PCT)
Prior art keywords
holder
adhesive
mirror
face
substrate
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Application number
PCT/JP2023/002105
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French (fr)
Japanese (ja)
Inventor
真 佐藤
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株式会社デンソー
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Publication of WO2023153197A1 publication Critical patent/WO2023153197A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Arrangement of adaptations of instruments
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors

Definitions

  • the disclosure described in this specification relates to a mirror unit, a virtual image display device, and a method of manufacturing the mirror unit.
  • the reflecting mirror is adhered and held to the holder via a moisture-curable adhesive.
  • the end of the holder is provided inside the end of the reflecting mirror. Since the end of the holder is provided inside the end of the reflecting mirror, the size of the holder is reduced. As the size of the holder is reduced, the support strength of the holder for the reflecting mirror is reduced. Moreover, since the adhesive is moisture-curing, it has been difficult to shorten the manufacturing time.
  • An object of the present disclosure is to provide a mirror unit, a virtual image display device, and a method of manufacturing the mirror unit that can reduce the size of the holder, suppress a decrease in the support strength of the holder for the reflecting mirror, and shorten the manufacturing time. That is.
  • a mirror unit includes: a mirror body having a plate-shaped base material having a mirror surface on the surface and capable of transmitting ultraviolet rays incident from the end face; an ultraviolet curable adhesive that is cured by ultraviolet light; a plate-shaped holder that holds the specular body from the back side of the base material via an adhesive, A holder end face provided at the end of the holder is provided inside the substrate end face, which is the end face of the substrate, in the orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged side by side.
  • the end face of the holder is provided inside the end face of the substrate, the size of the holder is reduced. Even if the holder is miniaturized, the base material can transmit the ultraviolet rays emitted from the end face of the base material, so that the ultraviolet rays transmitted through the base material are widely applied to the adhesive in the orthogonal direction.
  • the holder and specular body can be widely bonded in the orthogonal direction. Therefore, even if the holder is downsized, it is possible to suppress a decrease in the support strength of the holder for the specular body.
  • the adhesive has ultraviolet curing properties, the curing time is short, and the manufacturing time can be shortened. According to this, it is possible to reduce the size of the holder, suppress a decrease in the support strength of the holder for the specular body, and shorten the manufacturing time.
  • a virtual image display device includes: a display device that emits image display light; a reflecting device that reflects the display light and projects it onto a projection member positioned in front of the viewer; A control unit that controls the display device and the reflection device, A virtual image display device for superimposing and displaying an image to a viewer as a virtual image in front of a projection member,
  • the reflector is a mirror body having a plate-shaped base material having a mirror surface on the surface and capable of transmitting ultraviolet rays incident from the end face; an ultraviolet curable adhesive that is cured by ultraviolet light; a plate-shaped holder that holds the specular body from the back side of the base material via an adhesive, A holder end face provided at the end of the holder is provided inside the substrate end face, which is the end face of the substrate, in the orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged side by side.
  • the virtual image display device is equipped with a mirror unit. For this reason, it is possible to reduce the size of the holder, suppress a decrease in the support strength of the holder for the mirror surface, and shorten the manufacturing time.
  • a method for manufacturing a mirror unit includes: A specular body having a mirror surface on the surface and having a plate-shaped base material that can transmit ultraviolet rays incident from the end face, an ultraviolet-curing adhesive that is cured by ultraviolet rays, and a plate-shaped holder that holds the specular body and a method for manufacturing a mirror unit, Apply adhesive to one side of the holder, mounting the specular body on the adhesive so that the end surface of the holder provided at the end of the holder is provided inside the end surface of the base material, which is the end surface of the base material; By irradiating the end surface of the base material with ultraviolet rays in the orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged, the UV light transmitted through the base material bonds the mirror body and the holder via an adhesive. .
  • FIG. 3 is a cross-sectional view of the mirror unit taken along line III-III shown in FIG. 2;
  • FIG. 3 is a cross-sectional view of the mirror unit taken along line IV-IV shown in FIG. 2;
  • FIG. It is a side view explaining the manufacturing method of a mirror unit. It is a side view explaining the manufacturing method of a mirror unit. It is a side view explaining the manufacturing method of a mirror unit. It is a side view explaining the manufacturing method of a mirror unit. It is a side view explaining the manufacturing method of a mirror unit. It is a side view explaining the manufacturing method of a mirror unit. It is a side view explaining the manufacturing method of a mirror unit.
  • FIG. 1 A first embodiment of the present disclosure will be described with reference to FIGS. 1 to 9.
  • the virtual image display device 100 is mounted on a vehicle such as an automobile.
  • the virtual image display device 100 is called a head-up display device.
  • the virtual image display device 100 causes the display light of the image emitted from the display device 110 to enter the projection position 10a of the projection member positioned in front of the viewer.
  • the viewer is the driver
  • the projection member is the windshield 10 on the front side of the vehicle.
  • the virtual image display device 100 superimposes and displays an image as a virtual image 20 on the foreground on the vehicle front extension line of the line connecting the driver and the projection position 10a. This allows the driver to view the virtual image 20 through the eyebox 30 .
  • the eyebox 30 is an area in which the driver can visually recognize the virtual image 20, and is like an observation window that is imaginary in front of the driver's eyes.
  • the eyebox 30 is, for example, rectangular.
  • the virtual image display device 100 includes a display device 110, a reflection device 120, a control device 140, etc., as shown in FIG.
  • the display device 110, the reflection device 120, and the control device 140, which are the main components of the virtual image display device 100, are arranged inside the instrument panel 40, which extends from the lower end surface of the windshield 10 to the rear of the passenger compartment and further downward. It is
  • the upper surface of the instrument panel 40 is provided with an opening 40a through which the display light from the reflecting device 120 passes.
  • a light-transmitting dustproof cover is provided over the opening 40a. Details of each configuration of the virtual image display device 100 will be described below.
  • the display device 110 emits display light representing an image.
  • the display device 110 has a light source, a lens, a display, and the like.
  • the light source unit emits light to the display.
  • the light source unit has its light emission state controlled by the control device 140 .
  • the lens is a member that converges the light from the light source toward the display, and is arranged on the side from which the light from the light source is emitted.
  • the display is transmissively illuminated by light from the light source unit and emits display light representing an image. The display is driven and controlled by the control device 140 .
  • the display emits display light representing an image toward the reflecting device 120 by the light emitted from the light source.
  • the image formed by the display is, for example, a guide image in a vehicle navigation system, a meter image showing vehicle information while the vehicle is running, and the like.
  • the reflecting device 120 is a device that reflects display light, and as shown in FIG. The mechanical configuration of the reflecting device 120 will be described below.
  • the mirror body 121 serves as a reflecting portion that reflects the display light from the display through the opening 40a of the instrument panel 40 to the projection position 10a of the windshield 10.
  • the specular body 121 is a specular body in which a base material surface 125a of a base material 125 is provided with a mirror surface 121a.
  • the mirror surface 121a will be explained later.
  • the base material 125 has a substantially rectangular plate shape. Note that the longitudinal direction of the base material 125 coincides with the lateral direction of the vehicle. The lateral direction of the base material 125 coincides with the direction perpendicular to the longitudinal direction of the base material 125 . The longitudinal direction of the base material 125 corresponds to the extension direction. The transverse direction of the base material 125 corresponds to the orthogonal direction. Note that the longitudinal direction is indicated as LD in the drawings after FIG. The short direction is shown as SD.
  • the substrate 125 has a substrate front surface 125a and a substrate rear surface 125b along its longitudinal direction and its lateral direction.
  • the substrate front surface 125a and the substrate rear surface 125b are spaced apart in the height direction orthogonal to the longitudinal direction and the lateral direction.
  • the height direction is shown as HD. Note that the height direction corresponds to the alignment direction.
  • the substrate surface 125a corresponds to the surface.
  • the substrate rear surface 125b corresponds to the rear surface.
  • the base material 125 has a first base material end surface 125c that is spaced apart in the lateral direction and a second base material end surface 125d that is spaced apart in the longitudinal direction and connects the base material front surface 125a and the base material back surface 125b.
  • the base material 125 is capable of transmitting ultraviolet rays incident thereon from the first base material end surface 125c and the second base material end surface 125d.
  • the first substrate end face 125c corresponds to the substrate end face.
  • the material of the base material 125 examples include soda-lime glass. However, the material of the base material 125 is not limited to soda-lime glass. Assuming that the refractive index of the air phase is 1.0, the substrate 125 may be made of a material having a refractive index of about 1.49 to 1.52. This is because it is considered that ultraviolet rays can be transmitted through a material having a refractive index of about 1.49 to 1.52.
  • the mirror surface 121a is formed by evaporating a metal such as aluminum or silver on the base material surface 125a of the base material 125 .
  • a mirror surface 121 a is formed on the surface of the mirror body 121 facing the display device 110 . That is, the mirror surface 121a serves as a reflecting surface.
  • the mirror body 121 is a concave mirror that is recessed on the side opposite to the mirror surface 121a, that is, on the side opposite to the reflecting surface. Thereby, the specular body 121 magnifies the image toward the projection position 10a.
  • the holder 122 is a substantially rectangular plate-like member that holds the specular body 121 .
  • the holder 122 is made of, for example, a resin material.
  • the holder 122 is provided on the back surface 125b side of the mirror body 121 .
  • the mirror body 121 and the holder 122 are arranged in the height direction.
  • the holder 122 has a holder front surface 122a and a holder rear surface 122b along its longitudinal direction and its lateral direction.
  • the longitudinal direction of the base material 125 and the longitudinal direction of the holder 122 match.
  • the short direction of the base material 125 and the short direction of the holder 122 match. Therefore, in this specification, the longitudinal directions of the mirror body 121 and the holder 122 are simply referred to as longitudinal directions.
  • the lateral direction of each of the mirror body 121 and the holder 122 is simply referred to as the lateral direction.
  • 122a corresponds to one surface.
  • the holder surface 122a faces the substrate back surface 125b in the height direction.
  • the holder 122 includes a first holder end face 122c spaced apart in the lateral direction and a second holder end face 122d spaced in the longitudinal direction and connecting the holder front face 122a and the holder back face 122b. Note that the first holder end face 122c corresponds to the holder end face.
  • the shaft portion 123 is formed integrally with the holder 122 at both ends in the longitudinal direction.
  • Axial portion 123 extends in the longitudinal direction.
  • the shaft portion 123 is rotatably supported by a support portion (not shown).
  • the holder 122 is rotatable around the shaft portion 123 . This makes it possible to adjust the angle of reflection with respect to the display light.
  • the motor unit 124 is a driving unit that drives the holder 122 and adjusts the angle of reflection with respect to the display light.
  • the motor section 124 is, for example, a synchronous motor that operates in synchronization with input pulse power, and is connected to the shaft section 123 .
  • the rotation of the motor section 124 is controlled by the control device 140 . By rotating the motor portion 124 in the forward direction or the reverse direction, the holder 122 is rotated about the shaft portion 123 with respect to the support body.
  • the control device 140 controls the display device 110 and the reflection device 120 . Specifically, the control device 140 controls the formation of an image on the display device, the operation control of the motor unit 124, and the like. The control device 140 forms an image to be displayed on the display when the ignition switch of the vehicle is turned on. Then, as shown in FIG. 1, the display emits display light of an image to the specular body 121 by the light emitted from the light source section. The specular body 121 reflects the display light emitted from the display to the projection position 10a of the windshield 10 through the opening 40a.
  • the display light reflected at the projection position 10a is superimposed and displayed as a virtual image 20 on a vehicle forward extension line of a line connecting the driver and the projection position 10a, and is visually recognized by the driver through an eyebox 30.
  • the control device 140 corresponds to a control unit.
  • a mirror unit 126 is a mechanical component included in the reflector 120 described above.
  • the mirror unit 126 includes an adhesive 51 in addition to the mirror body 121, the holder 122, and the shaft portion 123 described above.
  • the adhesive 51 is UV curable and hardens in a short period of time, for example, several seconds, when irradiated with UV rays.
  • the refractive index of the adhesive 51 is desirably about 1.5, which allows transmission of ultraviolet rays.
  • the adhesive 51 is provided between the mirror body 121 and the holder 122 .
  • the holder 122 is provided with a convex portion 122e that protrudes from the holder surface 122a toward the substrate rear surface 125b.
  • the adhesive 51 is provided between the convex portion 122e and the back surface 125b of the substrate. From another point of view, the adhesive 51 is provided on the holder 122 .
  • the adhesive 51 is provided on the protrusion 122 e of the holder 122 .
  • the holder 122 and the mirror body 121 are adhered via the adhesive 51 .
  • the adhesive 51 is provided at the four corners of the holder 122 so as to surround the center of gravity 122f of the holder 122. As shown in FIG.
  • the holder 122 and the mirror body 121 are arranged in the height direction. As shown in FIG. 4, the holder 122 is included in the projected area in the height direction of the mirror body 121 in the lateral direction.
  • the first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction. In other words, the first holder end face 122c is provided closer to the center of gravity 122f in the lateral direction than the first base material end face 125c.
  • the bonding end face 51c of the end face of the adhesive 51 in the lateral direction is provided inside the first holder end face 122c in the lateral direction.
  • the bonding end surface 51c is provided inside the first substrate end surface 125c in the lateral direction.
  • the bonding end face 51c is provided closer to the center of gravity 122f in the lateral direction than the first holder end face 122c.
  • the bonding end surface 51c is provided closer to the center of gravity 122f than the first substrate end surface 125c in the lateral direction.
  • FIGS. 9 is an enlarged view of a part of FIG. A solid line passing through the inside of the base material 125 shown in FIG. 9 indicates ultraviolet rays.
  • the specular body 121, the holder 122, and the adhesive 51 are prepared. After preparation, the mirror unit 126 is manufactured. As shown in FIG. 5, the holder 122 is mounted on a jig (not shown). As shown in FIG. 6, the adhesive 51 before ultraviolet irradiation is applied to the projections 122e of the holder 122. Then, as shown in FIG. As shown in FIG. 7, the specular body 121 is mounted on the adhesive 51 so that the first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction.
  • the manufacturing method of this step is not limited to this.
  • the mirror body 121 is mounted on a jig (not shown)
  • the adhesive 51 is applied to the back surface 125b of the base material of the mirror body 121 before ultraviolet irradiation
  • the first holder end surface 122c is shorter than the first base material end surface 125c.
  • the holder 122 may be mounted on the adhesive 51 so that it is oriented inward.
  • the adhesive 51 and the end face 125c of the first base material are irradiated with ultraviolet rays from the short direction.
  • the shaft portions 123 extending in the longitudinal direction are provided at both ends of the holder 122 in the longitudinal direction. Therefore, when ultraviolet rays are applied to the adhesive 51 from the ends of the holder 122 in the longitudinal direction, the ultraviolet rays are easily blocked by the shaft portion 123 . For this reason, in this embodiment, the adhesive 51 and the end surface 125c of the first base material are positively irradiated with ultraviolet rays from the lateral direction.
  • the base material 125 of the mirror body 121 is capable of transmitting ultraviolet rays incident thereon from the first base material end surface 125c. Therefore, when ultraviolet rays are irradiated toward the first substrate end surface 125 c in the lateral direction, the ultraviolet rays pass through the inside of the substrate 125 . As shown in FIG. 9, the ultraviolet light travels toward the adhesive 51 while being reflected inside the base material 125 .
  • the adhesive 51 is irradiated with ultraviolet rays, which are included in the ultraviolet rays that have penetrated into the base material 125 and travel from the base surface 125a toward the base back surface 125b.
  • the adhesive 51 it is possible to irradiate the adhesive 51 with ultraviolet rays over a wide width in the lateral direction. In other words, it is possible to irradiate the adhesive 51 with ultraviolet rays to the inner side in the lateral direction.
  • the reflectance of the base material 125 may be such that the ultraviolet rays can reach the adhesive 51 .
  • the base material 125 is capable of transmitting ultraviolet rays incident from the first base material end surface 125c into the inside of the base material 125 .
  • An adhesive 51 and a holder 122 are provided on the back surface 125 b side of the base material 125 .
  • a mirror body 121 is held by a holder 122 via an adhesive 51 .
  • the adhesive 51 has ultraviolet curing properties.
  • the first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction. According to this, the physical size of the holder 122 is reduced.
  • the base material 125 can transmit the ultraviolet rays irradiated from the first base material end surface 125c.
  • the agent 51 is irradiated.
  • the specular body 121 and the holder 122 can be adhered to the inner side in the lateral direction with the adhesive 51 interposed therebetween. It is possible to suppress unevenness in adhesion quality between the inner side and the outer side of the adhesive 51 in the lateral direction. Even if the holder 122 is miniaturized, it is possible to suppress a decrease in the support strength of the holder 122 for the specular body 121 .
  • the adhesive 51 has ultraviolet curing properties, the curing time is short, and the manufacturing time can be shortened. According to this, it is possible to reduce the size of the holder 122, suppress a decrease in the support strength of the holder 122 to the mirror body 121, and shorten the manufacturing time. It also leads to cost reduction.
  • the adhesive 51 when a resin or the like that does not transmit ultraviolet rays is applied to the base material 125 , the adhesive 51 is irradiated with ultraviolet rays from a small gap between the mirror body 121 and the holder 122 . In that case, the adhesive 51 is not irradiated with sufficient ultraviolet rays, and the curing of the adhesive 51 takes a very long time.
  • the adhesive 51 hardens from the outside in the widthwise direction, the adhesion quality may be uneven between the outside and the inside in the widthwise direction.
  • a resin or the like that does not transmit ultraviolet rays is applied to the substrate 125, it is difficult to provide the first holder end surface 122c inside the first substrate end surface 125c in the lateral direction. It is desirable that the distance between the first holder end surface 122c and the first substrate end surface 125c is short in the lateral direction, and that the adhesive 51 is arranged as far outward as possible in the lateral direction.
  • the size of the holder 122 tends to increase, and when the holder 122 is rotated around the shaft portion 123, the rotational trajectory of the holder 122 is large, and the mountability inside the instrument panel 40 deteriorates.
  • the adhesive 51 is provided at the four corners of the holder 122 so as to surround the center of gravity 122f. According to this, the holder 122 can stably hold the mirror body 121 .
  • the longitudinally extending shaft portion 123 is integrally connected to the longitudinal end of the holder 122 .
  • the holder 122 is rotatable around the shaft portion 123 .
  • the first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction. According to this, even if the mirror unit 126 is rotated about the shaft portion 123 to the extent that the angle of the reflected light can be adjusted, the rotational trajectory of the holder 122 is small, and the holder 122 is located inside the instrument panel 40. It is difficult to come into contact with electrical equipment, panels, etc. Mountability of the mirror unit 126 inside the instrument panel 40 is improved.
  • the first holder end face 122c is provided inward of the first substrate end face 125c in the lateral direction, and the second holder end face 122d is located longitudinally inward of the second substrate end face 125d. may be provided on the inside. According to this, the size of the holder 122 can be further reduced. In addition, the mountability of the mirror unit 126 inside the instrument panel 40 is further improved.
  • the length L1 in the longitudinal direction of some of the adhesives 51 provided so as to surround the center of gravity 122f is longer than the length L2 in the lateral direction. good too.
  • the adhesive 51 can be easily irradiated with ultraviolet light widely in the longitudinal direction, and the width of the adhesive 51 in the lateral direction is narrow. It's becoming
  • the length L1 in the longitudinal direction of all adhesives 51 provided to surround the center of gravity 122f may be longer than the length L1 in the lateral direction.
  • the specular body 121 and the holder 122 can be adhered more efficiently via the adhesive 51 .
  • An adhesive 51 may be provided between the mirror body 121 and the holder 122 so as to cover the center of gravity 122f as shown in FIG.
  • the holder 122 may have a shape other than a substantially rectangular shape. Even in that case, it is desirable that the adhesive 51 is provided between the mirror body 121 and the holder 122 so as to surround or cover the center of gravity 122f.

Abstract

Provided is a mirror unit comprising: a mirror body (121) including a plate-shaped substrate (125) that has a mirror (121a) on a front surface (125a) thereof and is capable of transmitting ultraviolet rays incident from an edge surface (125c) thereof; an adhesive (51) that has UV curability, that is, is cured by ultraviolet rays; and a plate-shaped holder (122) that holds the mirror body from the side of a back surface (125b) of the substrate via the adhesive, wherein a holder edge surface (122c) at the edge of the holder is provided inward of the substrate edge surface (125c), which is an edge surface of the substrate, with respect to a direction orthogonal to the direction along which the mirror body and the holder are arranged.

Description

ミラーユニット、虚像表示装置、およびミラーユニットの製造方法MIRROR UNIT, VIRTUAL IMAGE DISPLAY DEVICE, AND MIRROR UNIT MANUFACTURING METHOD 関連出願の相互参照Cross-reference to related applications
　この出願は、２０２２年２月１４日に日本に出願された特許出願第２０２２－０２０６９０号を基礎としており、基礎の出願の内容を、全体的に、参照により援用している。 This application is based on Patent Application No. 2022-020690 filed in Japan on February 14, 2022, and the content of the underlying application is incorporated by reference in its entirety.
　本明細書に記載の開示は、ミラーユニット、虚像表示装置、およびミラーユニットの製造方法に関するものである。 The disclosure described in this specification relates to a mirror unit, a virtual image display device, and a method of manufacturing the mirror unit.
　特許文献１に記載のミラーユニットでは、反射ミラーが湿気硬化性の接着剤を介してホルダに接着保持されている。 In the mirror unit described in Patent Document 1, the reflecting mirror is adhered and held to the holder via a moisture-curable adhesive.
特許第６７３３４７０号公報Japanese Patent No. 6733470
　また特許文献１に記載のミラーユニットでは、ホルダの端部が反射ミラーの端部よりも内側に設けられている。ホルダの端部が反射ミラーの端部よりも内側に設けられている分、ホルダの体格が小型化する。ホルダの体格が小型化すると、ホルダの反射ミラーに対する支持強度が低下する。その上、接着剤が湿気硬化性を有するので、製造時間を短縮することが難しかった。 Also, in the mirror unit described in Patent Document 1, the end of the holder is provided inside the end of the reflecting mirror. Since the end of the holder is provided inside the end of the reflecting mirror, the size of the holder is reduced. As the size of the holder is reduced, the support strength of the holder for the reflecting mirror is reduced. Moreover, since the adhesive is moisture-curing, it has been difficult to shorten the manufacturing time.
　本開示の目的は、ホルダの体格の小型化と、ホルダの反射ミラーに対する支持強度低下の抑制と、製造時間の短縮が可能な、ミラーユニット、虚像表示装置、およびミラーユニットの製造方法を提供することである。 An object of the present disclosure is to provide a mirror unit, a virtual image display device, and a method of manufacturing the mirror unit that can reduce the size of the holder, suppress a decrease in the support strength of the holder for the reflecting mirror, and shorten the manufacturing time. That is.
　本開示の一態様によるミラーユニットは、
　表面に鏡面が設けられ、端面から入射される紫外線を透過可能な板状の基材を有する鏡面体と、
　紫外線によって硬化する紫外線硬化性を有する接着剤と、
　接着剤を介して基材の裏面側から鏡面体を保持する板状のホルダと、を備え、
　鏡面体とホルダとが並ぶ並び方向に直交する直交方向で、ホルダの端に設けられるホルダ端面が、基材の端面である基材端面よりも内側に設けられている。 A mirror unit according to one aspect of the present disclosure includes:
a mirror body having a plate-shaped base material having a mirror surface on the surface and capable of transmitting ultraviolet rays incident from the end face;
an ultraviolet curable adhesive that is cured by ultraviolet light;
a plate-shaped holder that holds the specular body from the back side of the base material via an adhesive,
A holder end face provided at the end of the holder is provided inside the substrate end face, which is the end face of the substrate, in the orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged side by side.
　ホルダ端面が基材端面よりも内側に設けられている分、ホルダの体格が小型化する。ホルダが小型化しても、基材は基材端面から照射される紫外線を透過可能であるから、基材を透過した紫外線が直交方向で広く接着剤に照射される。直交方向で広くホルダと鏡面体を接着できる。そのためにホルダが小型化しても、ホルダの鏡面体に対する支持強度が低下することを抑制できる。その上、接着剤は紫外線硬化性を有するため、硬化時間が短く、製造時間を短縮できる。これによれば、ホルダの体格の小型化と、ホルダの鏡面体に対する支持強度低下の抑制と、製造時間の短縮が可能になる。 Since the end face of the holder is provided inside the end face of the substrate, the size of the holder is reduced. Even if the holder is miniaturized, the base material can transmit the ultraviolet rays emitted from the end face of the base material, so that the ultraviolet rays transmitted through the base material are widely applied to the adhesive in the orthogonal direction. The holder and specular body can be widely bonded in the orthogonal direction. Therefore, even if the holder is downsized, it is possible to suppress a decrease in the support strength of the holder for the specular body. In addition, since the adhesive has ultraviolet curing properties, the curing time is short, and the manufacturing time can be shortened. According to this, it is possible to reduce the size of the holder, suppress a decrease in the support strength of the holder for the specular body, and shorten the manufacturing time.
　本開示の別の一態様による虚像表示装置は、
　画像の表示光を出射する表示装置と、
　表示光を反射させて、視認者の前方に位置する投影部材に投影する反射装置と、
　表示装置と反射装置の制御を行う制御部と、を備え、
　画像を、投影部材の前方に虚像として、視認者に対して重畳表示する虚像表示装置であって、
　反射装置は、
　表面に鏡面が設けられ、端面から入射される紫外線を透過可能な板状の基材を有する鏡面体と、
　紫外線によって硬化する紫外線硬化性を有する接着剤と、
　接着剤を介して基材の裏面側から鏡面体を保持する板状のホルダと、を備え、
　鏡面体とホルダとが並ぶ並び方向に直交する直交方向で、ホルダの端に設けられるホルダ端面が、基材の端面である基材端面よりも内側に設けられている。 A virtual image display device according to another aspect of the present disclosure includes:
a display device that emits image display light;
a reflecting device that reflects the display light and projects it onto a projection member positioned in front of the viewer;
A control unit that controls the display device and the reflection device,
A virtual image display device for superimposing and displaying an image to a viewer as a virtual image in front of a projection member,
The reflector is
a mirror body having a plate-shaped base material having a mirror surface on the surface and capable of transmitting ultraviolet rays incident from the end face;
an ultraviolet curable adhesive that is cured by ultraviolet light;
a plate-shaped holder that holds the specular body from the back side of the base material via an adhesive,
A holder end face provided at the end of the holder is provided inside the substrate end face, which is the end face of the substrate, in the orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged side by side.
　虚像表示装置はミラーユニットを備える。そのためにホルダの体格の小型化と、ホルダの鏡面体に対する支持強度低下の抑制と、製造時間の短縮が可能になる。 The virtual image display device is equipped with a mirror unit. For this reason, it is possible to reduce the size of the holder, suppress a decrease in the support strength of the holder for the mirror surface, and shorten the manufacturing time.
　本開示の別の一態様によるミラーユニットの製造方法は、
　表面に鏡面が設けられ、端面から入射される紫外線を透過可能な板状の基材を有する鏡面体と、紫外線によって硬化する紫外線硬化性を有する接着剤と、鏡面体を保持する板状のホルダと、を備えるミラーユニットの製造方法であって、
　ホルダの一面に接着剤を塗布し、
　ホルダの端に設けられるホルダ端面が、基材の端面である基材端面よりも内側に設けられるよう、鏡面体を接着剤に搭載し、
　鏡面体とホルダとが並ぶ並び方向に直交する直交方向で、基材端面に向かって紫外線を照射することで、基材を透過した紫外線によって、鏡面体とホルダとを接着剤を介して接着する。 A method for manufacturing a mirror unit according to another aspect of the present disclosure includes:
A specular body having a mirror surface on the surface and having a plate-shaped base material that can transmit ultraviolet rays incident from the end face, an ultraviolet-curing adhesive that is cured by ultraviolet rays, and a plate-shaped holder that holds the specular body and a method for manufacturing a mirror unit,
Apply adhesive to one side of the holder,
mounting the specular body on the adhesive so that the end surface of the holder provided at the end of the holder is provided inside the end surface of the base material, which is the end surface of the base material;
By irradiating the end surface of the base material with ultraviolet rays in the orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged, the UV light transmitted through the base material bonds the mirror body and the holder via an adhesive. .
　これによれば、ホルダの体格を小型化した状態で、ホルダの鏡面体に対する支持強度低下の抑制と、製造時間の短縮が可能になる。 According to this, it is possible to suppress a decrease in the supporting strength of the holder for the specular body and to shorten the manufacturing time, while keeping the size of the holder small.
　なお、添付した請求の範囲の括弧内の参照番号は、後述の実施形態に記載の構成との対応関係を示すものに過ぎず、技術的範囲を何ら制限するものではない。 It should be noted that the reference numbers in parentheses in the attached claims merely indicate the correspondence with the configurations described in the embodiments described later, and do not limit the technical scope in any way.
第１実施形態のＨＵＤ装置の構成を示す図である。It is a figure which shows the structure of the HUD apparatus of 1st Embodiment. 第１実施形態のミラーユニットを示す正面図である。It is a front view which shows the mirror unit of 1st Embodiment. 図２に示すＩＩＩ－ＩＩＩ線に沿うミラーユニットの断面図である。3 is a cross-sectional view of the mirror unit taken along line III-III shown in FIG. 2; FIG. 図２に示すＩＶ－ＩＶ線に沿うミラーユニットの断面図である。3 is a cross-sectional view of the mirror unit taken along line IV-IV shown in FIG. 2; FIG. ミラーユニットの製造方法を説明する側面図である。It is a side view explaining the manufacturing method of a mirror unit. ミラーユニットの製造方法を説明する側面図である。It is a side view explaining the manufacturing method of a mirror unit. ミラーユニットの製造方法を説明する側面図である。It is a side view explaining the manufacturing method of a mirror unit. ミラーユニットの製造方法を説明する側面図である。It is a side view explaining the manufacturing method of a mirror unit. ミラーユニットの製造方法を説明する側面図である。It is a side view explaining the manufacturing method of a mirror unit. 第２実施形態のミラーユニットを示す正面図である。It is a front view which shows the mirror unit of 2nd Embodiment. 第３実施形態のミラーユニットを示す正面図である。It is a front view which shows the mirror unit of 3rd Embodiment. 第４実施形態のミラーユニットを示す正面図である。It is a front view which shows the mirror unit of 4th Embodiment. 第５実施形態のミラーユニットを示す正面図である。It is a front view which shows the mirror unit of 5th Embodiment. 第６実施形態のミラーユニットを示す正面図である。It is a front view which shows the mirror unit of 6th Embodiment.
　以下、図面を参照しながら本開示を実施するための複数の形態を説明する。各形態において先行する形態で説明した事項に対応する部分には同一の参照符号を付して重複する説明を省略する場合がある。各形態において構成の一部のみを説明している場合は、構成の他の部分については先行して説明した他の形態を適用することができる。 A plurality of modes for carrying out the present disclosure will be described below with reference to the drawings. In each form, the same reference numerals may be given to the parts corresponding to the matters described in the preceding form, and overlapping explanations may be omitted. When only a part of the configuration is described in each form, the previously described other forms can be applied to other parts of the configuration.
　また、各実施形態で組み合わせが可能であることを明示している部分同士の組み合わせばかりではなく、特に組み合わせに支障が生じなければ、明示していなくても実施形態同士、実施形態と変形例、および、変形例同士を部分的に組み合せることも可能である。 In addition, not only combinations of parts that are explicitly stated that combinations are possible in each embodiment, but also embodiments, embodiments and modifications, even if not explicitly stated, as long as there is no particular problem with the combination. And it is also possible to partially combine the modifications.
　（第１実施形態）
　本開示の第１実施形態に関して、図１～図９を用いて説明する。図１に示すように、虚像表示装置１００は、例えば、自動車等の車両に搭載される。虚像表示装置１００は、ヘッドアップディスプレイ（Head‐Up Display）装置と呼ばれる。虚像表示装置１００は、表示装置１１０から出射される画像の表示光を、視認者の前方に位置する投影部材の投射位置１０ａに入射させる。 (First embodiment)
A first embodiment of the present disclosure will be described with reference to FIGS. 1 to 9. FIG. As shown in FIG. 1, the virtual image display device 100 is mounted on a vehicle such as an automobile. The virtual image display device 100 is called a head-up display device. The virtual image display device 100 causes the display light of the image emitted from the display device 110 to enter the projection position 10a of the projection member positioned in front of the viewer.
　車載用の虚像表示装置１００では、視認者は運転者であり、投影部材は車両のフロント側のウインドシールド１０である。虚像表示装置１００は、運転者と投射位置１０ａとを結ぶ線の車両前方延長線上の前景に、画像を虚像２０として重畳表示する。これによって運転者は、アイボックス３０を通して、虚像２０を視認することができる。アイボックス３０は、運転者が虚像２０を視認可能とする領域であり、運転者の目の前に仮想されるのぞき窓のようなものである。アイボックス３０は、例えば、矩形を成している。 In the in-vehicle virtual image display device 100, the viewer is the driver, and the projection member is the windshield 10 on the front side of the vehicle. The virtual image display device 100 superimposes and displays an image as a virtual image 20 on the foreground on the vehicle front extension line of the line connecting the driver and the projection position 10a. This allows the driver to view the virtual image 20 through the eyebox 30 . The eyebox 30 is an area in which the driver can visually recognize the virtual image 20, and is like an observation window that is imaginary in front of the driver's eyes. The eyebox 30 is, for example, rectangular.
　虚像表示装置１００は、図１に示すように、表示装置１１０、反射装置１２０、および制御装置１４０等を備えている。虚像表示装置１００の主たる構成要素となる表示装置１１０、反射装置１２０、制御装置１４０は、ウインドシールド１０の下端面から車室内後方、さらには下方に延出されるインストルメントパネル４０の内側に配設されている。 The virtual image display device 100 includes a display device 110, a reflection device 120, a control device 140, etc., as shown in FIG. The display device 110, the reflection device 120, and the control device 140, which are the main components of the virtual image display device 100, are arranged inside the instrument panel 40, which extends from the lower end surface of the windshield 10 to the rear of the passenger compartment and further downward. It is
　インストルメントパネル４０の上面には、反射装置１２０からの表示光を通過させる開口部４０ａが設けられている。また開口部４０ａには透光性を有する防塵カバーが設けられている。以下、虚像表示装置１００の各構成の詳細について説明する。 The upper surface of the instrument panel 40 is provided with an opening 40a through which the display light from the reflecting device 120 passes. A light-transmitting dustproof cover is provided over the opening 40a. Details of each configuration of the virtual image display device 100 will be described below.
　表示装置１１０は、画像を表す表示光を出射する。表示装置１１０は、光源部、レンズ、および表示器等を有している。光源部は、表示器に対して光を出射する。光源部は、制御装置１４０によって発光状態が制御される。 The display device 110 emits display light representing an image. The display device 110 has a light source, a lens, a display, and the like. The light source unit emits light to the display. The light source unit has its light emission state controlled by the control device 140 .
　レンズは、光源部からの光を表示器に向けて集光させる部材であり、光源部による光の出射側に配置されている。表示器は、光源部からの光によって透過照明されて、画像を表す表示光を出射する。表示器は、制御装置１４０によって駆動制御される。 The lens is a member that converges the light from the light source toward the display, and is arranged on the side from which the light from the light source is emitted. The display is transmissively illuminated by light from the light source unit and emits display light representing an image. The display is driven and controlled by the control device 140 .
　表示器は、光源部から出射される光によって、画像を表す表示光を反射装置１２０に向けて出射する。表示器によって形成される画像は、例えば、車両用ナビゲーションシステムにおける案内画像、および車両走行時における車両情報を示すメータ画像などである。 The display emits display light representing an image toward the reflecting device 120 by the light emitted from the light source. The image formed by the display is, for example, a guide image in a vehicle navigation system, a meter image showing vehicle information while the vehicle is running, and the like.
　反射装置１２０は、表示光を反射させる装置であり、図１に示すように、鏡面体１２１、ホルダ１２２、軸部１２３、およびモータ部１２４等を有している。以下、反射装置１２０の機械的構成を説明する。 The reflecting device 120 is a device that reflects display light, and as shown in FIG. The mechanical configuration of the reflecting device 120 will be described below.
　鏡面体１２１は、表示器からの表示光を、インストルメントパネル４０の開口部４０ａを通して、ウインドシールド１０の投射位置１０ａに反射させる反射部となっている。図２～図４に示すように、鏡面体１２１は、基材１２５の基材表面１２５ａに鏡面１２１ａが設けられた鏡面体である。鏡面１２１ａについては後で説明する。基材１２５は、略長方形を成す板状である。なお基材１２５の長手方向は車両の左右方向と一致している。基材１２５の短手方向は、基材１２５の長手方向に直交する方向と一致している。基材１２５の長手方向が延長方向に相当する。基材１２５の短手方向が直交方向に相当する。なお、図２以降の図面においては長手方向をＬＤと示す。短手方向をＳＤと示す。 The mirror body 121 serves as a reflecting portion that reflects the display light from the display through the opening 40a of the instrument panel 40 to the projection position 10a of the windshield 10. As shown in FIGS. 2 to 4, the specular body 121 is a specular body in which a base material surface 125a of a base material 125 is provided with a mirror surface 121a. The mirror surface 121a will be explained later. The base material 125 has a substantially rectangular plate shape. Note that the longitudinal direction of the base material 125 coincides with the lateral direction of the vehicle. The lateral direction of the base material 125 coincides with the direction perpendicular to the longitudinal direction of the base material 125 . The longitudinal direction of the base material 125 corresponds to the extension direction. The transverse direction of the base material 125 corresponds to the orthogonal direction. Note that the longitudinal direction is indicated as LD in the drawings after FIG. The short direction is shown as SD.
　図３および図４に示すように、基材１２５は、自身の長手方向と自身の短手方向に沿う、基材表面１２５ａと基材裏面１２５ｂを備える。基材表面１２５ａと基材裏面１２５ｂは、長手方向と短手方向に直交する高さ方向に離間している。図面においては、高さ方向をＨＤと示す。なお、高さ方向は並び方向に相当する。基材表面１２５ａは表面に相当する。基材裏面１２５ｂは裏面に相当する。 As shown in FIGS. 3 and 4, the substrate 125 has a substrate front surface 125a and a substrate rear surface 125b along its longitudinal direction and its lateral direction. The substrate front surface 125a and the substrate rear surface 125b are spaced apart in the height direction orthogonal to the longitudinal direction and the lateral direction. In the drawings, the height direction is shown as HD. Note that the height direction corresponds to the alignment direction. The substrate surface 125a corresponds to the surface. The substrate rear surface 125b corresponds to the rear surface.
　基材１２５は、基材表面１２５ａと基材裏面１２５ｂを連結する、短手方向に離間して並ぶ第１基材端面１２５ｃと、長手方向に離間して並ぶ第２基材端面１２５ｄを備える。基材１２５は、第１基材端面１２５ｃおよび第２基材端面１２５ｄから入射される紫外線を、基材１２５の内部に透過可能になっている。なお、第１基材端面１２５ｃが基材端面に相当する。 The base material 125 has a first base material end surface 125c that is spaced apart in the lateral direction and a second base material end surface 125d that is spaced apart in the longitudinal direction and connects the base material front surface 125a and the base material back surface 125b. The base material 125 is capable of transmitting ultraviolet rays incident thereon from the first base material end surface 125c and the second base material end surface 125d. Note that the first substrate end face 125c corresponds to the substrate end face.
　基材１２５の材質としてはソーダ石灰ガラスなどが挙げられる。しかしながら基材１２５の材質はソーダ石灰ガラスに限定されない。空気相の屈折率を１．０とした時、基材１２５は１．４９～１．５２程度の屈折率を有する材質であればよい。屈折率が１．４９～１．５２程度であれば紫外線が透過可能であると考えられるためである。 Examples of the material of the base material 125 include soda-lime glass. However, the material of the base material 125 is not limited to soda-lime glass. Assuming that the refractive index of the air phase is 1.0, the substrate 125 may be made of a material having a refractive index of about 1.49 to 1.52. This is because it is considered that ultraviolet rays can be transmitted through a material having a refractive index of about 1.49 to 1.52.
　鏡面１２１ａは、基材１２５の基材表面１２５ａにアルミニウムや銀等の金属が蒸着されることで形成される。鏡面体１２１における表示装置１１０を向く側の面に鏡面１２１ａが形成される。すなわち鏡面１２１ａが反射面となっている。鏡面体１２１は、鏡面１２１ａとは反対側、すなわち反射面とは反対側に凹む凹面鏡となっている。これによって鏡面体１２１は、画像を投射位置１０ａに向けて拡大する。 The mirror surface 121a is formed by evaporating a metal such as aluminum or silver on the base material surface 125a of the base material 125 . A mirror surface 121 a is formed on the surface of the mirror body 121 facing the display device 110 . That is, the mirror surface 121a serves as a reflecting surface. The mirror body 121 is a concave mirror that is recessed on the side opposite to the mirror surface 121a, that is, on the side opposite to the reflecting surface. Thereby, the specular body 121 magnifies the image toward the projection position 10a.
　ホルダ１２２は、略長方形の板状であって、鏡面体１２１を保持する部材である。ホルダ１２２は例えば、樹脂材によって形成されている。ホルダ１２２は、鏡面体１２１の基材裏面１２５ｂ側に設けられている。鏡面体１２１とホルダ１２２は高さ方向で並んでいる。 The holder 122 is a substantially rectangular plate-like member that holds the specular body 121 . The holder 122 is made of, for example, a resin material. The holder 122 is provided on the back surface 125b side of the mirror body 121 . The mirror body 121 and the holder 122 are arranged in the height direction.
　図３および図４に示すようにホルダ１２２は、自身の長手方向と自身の短手方向に沿う、ホルダ表面１２２ａとホルダ裏面１２２ｂを備える。なお、基材１２５の長手方向とホルダ１２２の長手方向とは一致している。基材１２５の短手方向とホルダ１２２の短手方向とは一致している。そのため本明細書においては鏡面体１２１とホルダ１２２それぞれの長手方向を単に長手方向と示す。鏡面体１２１とホルダ１２２それぞれの短手方向を単に短手方向と示す。なお１２２ａは一面に相当する。 As shown in FIGS. 3 and 4, the holder 122 has a holder front surface 122a and a holder rear surface 122b along its longitudinal direction and its lateral direction. Note that the longitudinal direction of the base material 125 and the longitudinal direction of the holder 122 match. The short direction of the base material 125 and the short direction of the holder 122 match. Therefore, in this specification, the longitudinal directions of the mirror body 121 and the holder 122 are simply referred to as longitudinal directions. The lateral direction of each of the mirror body 121 and the holder 122 is simply referred to as the lateral direction. Note that 122a corresponds to one surface.
　ホルダ表面１２２ａは基材裏面１２５ｂと高さ方向で対向する。ホルダ１２２は、ホルダ表面１２２ａとホルダ裏面１２２ｂを連結する、短手方向に離間して並ぶ第１ホルダ端面１２２ｃと、長手方向に離間して並ぶ第２ホルダ端面１２２ｄと、を備える。なお、第１ホルダ端面１２２ｃがホルダ端面に相当する。 The holder surface 122a faces the substrate back surface 125b in the height direction. The holder 122 includes a first holder end face 122c spaced apart in the lateral direction and a second holder end face 122d spaced in the longitudinal direction and connecting the holder front face 122a and the holder back face 122b. Note that the first holder end face 122c corresponds to the holder end face.
　図２に示すように軸部１２３は、長手方向の両端側において、ホルダ１２２に一体的に形成されている。軸部１２３は長手方向に延びている。軸部１２３は図示しない支持部によって回転可能に支持されている。ホルダ１２２が軸部１２３を中心に回転可能になっている。これによって表示光に対する反射角を調整可能になっている。 As shown in FIG. 2, the shaft portion 123 is formed integrally with the holder 122 at both ends in the longitudinal direction. Axial portion 123 extends in the longitudinal direction. The shaft portion 123 is rotatably supported by a support portion (not shown). The holder 122 is rotatable around the shaft portion 123 . This makes it possible to adjust the angle of reflection with respect to the display light.
　モータ部１２４は、ホルダ１２２を駆動して、表示光に対する反射角度を調整する駆動部である。モータ部１２４は、例えば、入力されるパルス電力に同期して動作する同期電動機であり、軸部１２３に接続されている。モータ部１２４は、制御装置１４０によって、回転制御される。モータ部１２４が正方向、あるいは逆方向に回転されることで、ホルダ１２２は、軸部１２３を中心として、支持体に対して回動されるようになっている。 The motor unit 124 is a driving unit that drives the holder 122 and adjusts the angle of reflection with respect to the display light. The motor section 124 is, for example, a synchronous motor that operates in synchronization with input pulse power, and is connected to the shaft section 123 . The rotation of the motor section 124 is controlled by the control device 140 . By rotating the motor portion 124 in the forward direction or the reverse direction, the holder 122 is rotated about the shaft portion 123 with respect to the support body.
　制御装置１４０は、表示装置１１０と反射装置１２０の制御を行う。具体的に言えば、制御装置１４０は、表示器の画像の形成制御およびモータ部１２４の作動制御などを行う。制御装置１４０は、車両のイグニッションスイッチがオンされると、表示器に表示すべき画像を形成させる。すると、図１に示すように、表示器は、光源部から出射される光によって画像の表示光を鏡面体１２１に出射させる。鏡面体１２１は、表示器から出射された表示光を、開口部４０ａを通して、ウインドシールド１０の投射位置１０ａに反射させる。投射位置１０ａに反射された表示光は、運転者と投射位置１０ａとを結ぶ線の車両前方延長線上に虚像２０として重畳表示されて、アイボックス３０を通して、運転者に視認されることになる。なお、制御装置１４０は制御部に相当する。 The control device 140 controls the display device 110 and the reflection device 120 . Specifically, the control device 140 controls the formation of an image on the display device, the operation control of the motor unit 124, and the like. The control device 140 forms an image to be displayed on the display when the ignition switch of the vehicle is turned on. Then, as shown in FIG. 1, the display emits display light of an image to the specular body 121 by the light emitted from the light source section. The specular body 121 reflects the display light emitted from the display to the projection position 10a of the windshield 10 through the opening 40a. The display light reflected at the projection position 10a is superimposed and displayed as a virtual image 20 on a vehicle forward extension line of a line connecting the driver and the projection position 10a, and is visually recognized by the driver through an eyebox 30. - 特許庁Note that the control device 140 corresponds to a control unit.
　＜ミラーユニット＞
　次に、ミラーユニット１２６について説明する。ミラーユニット１２６は上記した反射装置１２０に含まれる機械的構成のことである。ミラーユニット１２６はこれまでに説明した、鏡面体１２１と、ホルダ１２２と、軸部１２３の他に、接着剤５１を備える。接着剤５１は紫外線が照射されることで、短時間、たとえば数秒で硬化する、紫外線硬化性を備えている。接着剤５１の屈折率は、紫外線が透過可能な約１．５程度であることが望ましい。 <Mirror unit>
Next, the mirror unit 126 will be explained. A mirror unit 126 is a mechanical component included in the reflector 120 described above. The mirror unit 126 includes an adhesive 51 in addition to the mirror body 121, the holder 122, and the shaft portion 123 described above. The adhesive 51 is UV curable and hardens in a short period of time, for example, several seconds, when irradiated with UV rays. The refractive index of the adhesive 51 is desirably about 1.5, which allows transmission of ultraviolet rays.
　接着剤５１は鏡面体１２１とホルダ１２２との間に設けられる。具体的に言えば、ホルダ１２２にはホルダ表面１２２ａから基材裏面１２５ｂに向かって突出する凸部１２２ｅが設けられている。接着剤５１は凸部１２２ｅと基材裏面１２５ｂの間に設けられる。また見方を変えれば、接着剤５１はホルダ１２２に設けられる。接着剤５１はホルダ１２２の凸部１２２ｅに設けられる。 The adhesive 51 is provided between the mirror body 121 and the holder 122 . Specifically, the holder 122 is provided with a convex portion 122e that protrudes from the holder surface 122a toward the substrate rear surface 125b. The adhesive 51 is provided between the convex portion 122e and the back surface 125b of the substrate. From another point of view, the adhesive 51 is provided on the holder 122 . The adhesive 51 is provided on the protrusion 122 e of the holder 122 .
　接着剤５１を介してホルダ１２２と鏡面体１２１とが接着される。接着剤５１はホルダ１２２の重心１２２ｆを囲むようにして、ホルダ１２２の四隅に設けられている。 The holder 122 and the mirror body 121 are adhered via the adhesive 51 . The adhesive 51 is provided at the four corners of the holder 122 so as to surround the center of gravity 122f of the holder 122. As shown in FIG.
　ホルダ１２２と鏡面体１２１とが高さ方向で並んでいる。図４に示すように短手方向において、鏡面体１２１の高さ方向の投影領域内に、ホルダ１２２が含まれている。第１ホルダ端面１２２ｃが、第１基材端面１２５ｃよりも、短手方向で内側に設けられている。言い換えれば、第１ホルダ端面１２２ｃが、第１基材端面１２５ｃよりも、短手方向で重心１２２ｆ側に設けられている。 The holder 122 and the mirror body 121 are arranged in the height direction. As shown in FIG. 4, the holder 122 is included in the projected area in the height direction of the mirror body 121 in the lateral direction. The first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction. In other words, the first holder end face 122c is provided closer to the center of gravity 122f in the lateral direction than the first base material end face 125c.
　また短手方向における接着剤５１の端面の接着端面５１ｃが、第１ホルダ端面１２２ｃよりも短手方向で内側に設けられている。接着端面５１ｃが、第１基材端面１２５ｃよりも短手方向で内側に設けられている。言い換えれば、接着端面５１ｃが、第１ホルダ端面１２２ｃよりも、短手方向で重心１２２ｆ側に設けられている。接着端面５１ｃが、第１基材端面１２５ｃよりも、短手方向で重心１２２ｆ側に設けられている。 Also, the bonding end face 51c of the end face of the adhesive 51 in the lateral direction is provided inside the first holder end face 122c in the lateral direction. The bonding end surface 51c is provided inside the first substrate end surface 125c in the lateral direction. In other words, the bonding end face 51c is provided closer to the center of gravity 122f in the lateral direction than the first holder end face 122c. The bonding end surface 51c is provided closer to the center of gravity 122f than the first substrate end surface 125c in the lateral direction.
　＜ミラーユニットの製造方法＞
　以下、図５～図９に基づいてミラーユニット１２６の製造方法を説明する。なお図９は図８の一部を拡大した図面である。図９に示す基材１２５の内部を透過する実線は紫外線を示している。 <Manufacturing method of mirror unit>
A method of manufacturing the mirror unit 126 will be described below with reference to FIGS. 9 is an enlarged view of a part of FIG. A solid line passing through the inside of the base material 125 shown in FIG. 9 indicates ultraviolet rays.
　始めに、上記した鏡面体１２１、ホルダ１２２、および、接着剤５１を準備する。準備した後、ミラーユニット１２６を製造する。図５に示すように図示しない治具にホルダ１２２を搭載する。図６に示すようにホルダ１２２の凸部１２２ｅに紫外線照射前の接着剤５１を塗布する。図７に示すように、第１ホルダ端面１２２ｃが第１基材端面１２５ｃよりも短手方向で内側に設けられるよう、鏡面体１２１を接着剤５１に搭載する。 First, the specular body 121, the holder 122, and the adhesive 51 are prepared. After preparation, the mirror unit 126 is manufactured. As shown in FIG. 5, the holder 122 is mounted on a jig (not shown). As shown in FIG. 6, the adhesive 51 before ultraviolet irradiation is applied to the projections 122e of the holder 122. Then, as shown in FIG. As shown in FIG. 7, the specular body 121 is mounted on the adhesive 51 so that the first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction.
　なお、図５においては、ホルダ１２２に接着剤５１を塗布し、接着剤５１に鏡面体１２１を搭載する形態を説明したが、この工程の製造方法はこれに限定されない。例えば、図示しない治具に鏡面体１２１を搭載し、鏡面体１２１の基材裏面１２５ｂに紫外線照射前の接着剤５１を塗布し、第１ホルダ端面１２２ｃが第１基材端面１２５ｃよりも短手方向で内側に設けられるよう、ホルダ１２２を接着剤５１に搭載してもよい。 In addition, in FIG. 5, an embodiment in which the adhesive 51 is applied to the holder 122 and the specular body 121 is mounted on the adhesive 51 has been described, but the manufacturing method of this step is not limited to this. For example, the mirror body 121 is mounted on a jig (not shown), the adhesive 51 is applied to the back surface 125b of the base material of the mirror body 121 before ultraviolet irradiation, and the first holder end surface 122c is shorter than the first base material end surface 125c. The holder 122 may be mounted on the adhesive 51 so that it is oriented inward.
　次に図８に示すように、短手方向から接着剤５１および第１基材端面１２５ｃに紫外線を照射する。上記したようにホルダ１２２の長手方向の両端に、長手方向に延びる軸部１２３が設けられている。そのためにホルダ１２２の長手方向の端から接着剤５１に紫外線を照射すると、軸部１２３によって紫外線が遮られやすくなっている。そのために本実施形態では短手方向から積極的に接着剤５１および第１基材端面１２５ｃに紫外線を照射している。 Next, as shown in FIG. 8, the adhesive 51 and the end face 125c of the first base material are irradiated with ultraviolet rays from the short direction. As described above, the shaft portions 123 extending in the longitudinal direction are provided at both ends of the holder 122 in the longitudinal direction. Therefore, when ultraviolet rays are applied to the adhesive 51 from the ends of the holder 122 in the longitudinal direction, the ultraviolet rays are easily blocked by the shaft portion 123 . For this reason, in this embodiment, the adhesive 51 and the end surface 125c of the first base material are positively irradiated with ultraviolet rays from the lateral direction.
　上記したように鏡面体１２１の基材１２５は、第１基材端面１２５ｃから入射される紫外線を内部に透過可能になっている。そのために短手方向で第１基材端面１２５ｃに向かって紫外線を照射すると、紫外線が基材１２５の内部を透過する。図９に示すように、紫外線は基材１２５の内部で反射しながら、接着剤５１に向かって進む。基材１２５の内部に入り込んだ紫外線のうちの、基材表面１２５ａから基材裏面１２５ｂに向かって進む紫外線が、接着剤５１に照射される。これによれば短手方向で広く、紫外線を接着剤５１に照射可能になっている。言い換えれば、短手方向で内側まで紫外線を接着剤５１に照射可能になっている。なお、基材１２５の反射率は紫外線が接着剤５１に到達可能な程度であればよい。 As described above, the base material 125 of the mirror body 121 is capable of transmitting ultraviolet rays incident thereon from the first base material end surface 125c. Therefore, when ultraviolet rays are irradiated toward the first substrate end surface 125 c in the lateral direction, the ultraviolet rays pass through the inside of the substrate 125 . As shown in FIG. 9, the ultraviolet light travels toward the adhesive 51 while being reflected inside the base material 125 . The adhesive 51 is irradiated with ultraviolet rays, which are included in the ultraviolet rays that have penetrated into the base material 125 and travel from the base surface 125a toward the base back surface 125b. According to this, it is possible to irradiate the adhesive 51 with ultraviolet rays over a wide width in the lateral direction. In other words, it is possible to irradiate the adhesive 51 with ultraviolet rays to the inner side in the lateral direction. Note that the reflectance of the base material 125 may be such that the ultraviolet rays can reach the adhesive 51 .
　＜作用効果＞
　これまでに説明したように、基材１２５は第１基材端面１２５ｃから入射される紫外線を基材１２５の内部に透過可能になっている。基材１２５の基材裏面１２５ｂ側に接着剤５１とホルダ１２２が設けられている。接着剤５１を介して鏡面体１２１がホルダ１２２に保持されている。接着剤５１は紫外線硬化性を有している。第１ホルダ端面１２２ｃが第１基材端面１２５ｃよりも短手方向で内側に設けられている。これによればホルダ１２２の体格が小型化する。 <Effect>
As described above, the base material 125 is capable of transmitting ultraviolet rays incident from the first base material end surface 125c into the inside of the base material 125 . An adhesive 51 and a holder 122 are provided on the back surface 125 b side of the base material 125 . A mirror body 121 is held by a holder 122 via an adhesive 51 . The adhesive 51 has ultraviolet curing properties. The first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction. According to this, the physical size of the holder 122 is reduced.
　またホルダ１２２が小型化しても、基材１２５は第１基材端面１２５ｃから照射される紫外線を内部に透過可能であるから、基材１２５の内部を透過した紫外線が短手方向で内側まで接着剤５１に照射される。これによれば短手方向で内側まで、接着剤５１を介して鏡面体１２１とホルダ１２２を接着できる。短手方向で接着剤５１の内側と外側で接着品質にムラができることを抑制できる。ホルダ１２２が小型化しても、ホルダ１２２の鏡面体１２１に対する支持強度が低下することを抑制できる。 Further, even if the holder 122 is made smaller, the base material 125 can transmit the ultraviolet rays irradiated from the first base material end surface 125c. The agent 51 is irradiated. According to this, the specular body 121 and the holder 122 can be adhered to the inner side in the lateral direction with the adhesive 51 interposed therebetween. It is possible to suppress unevenness in adhesion quality between the inner side and the outer side of the adhesive 51 in the lateral direction. Even if the holder 122 is miniaturized, it is possible to suppress a decrease in the support strength of the holder 122 for the specular body 121 .
　さらに、接着剤５１は紫外線硬化性を有するため、硬化時間が短く、製造時間を短縮できる。これによれば、ホルダ１２２の体格の小型化と、ホルダ１２２の鏡面体１２１に対する支持強度低下の抑制と、製造時間の短縮が可能になる。コスト削減にもつながる。 Furthermore, since the adhesive 51 has ultraviolet curing properties, the curing time is short, and the manufacturing time can be shortened. According to this, it is possible to reduce the size of the holder 122, suppress a decrease in the support strength of the holder 122 to the mirror body 121, and shorten the manufacturing time. It also leads to cost reduction.
　本実施形態とは異なり、基材１２５に紫外線透過性を有さない樹脂などが適用される場合、鏡面体１２１とホルダ１２２の間のわずかな隙間から紫外線が接着剤５１に照射される。その場合、接着剤５１に十分な紫外線が照射されず、接着剤５１の硬化に著しく硬化に時間がかかる。 Unlike the present embodiment, when a resin or the like that does not transmit ultraviolet rays is applied to the base material 125 , the adhesive 51 is irradiated with ultraviolet rays from a small gap between the mirror body 121 and the holder 122 . In that case, the adhesive 51 is not irradiated with sufficient ultraviolet rays, and the curing of the adhesive 51 takes a very long time.
　その上、接着剤５１は短手方向の外側から硬化が進行するために、短手方向の外側と内側で接着品質にムラが生じることがある。これらの理由から、基材１２５に紫外線透過性を有さない樹脂などが適用される場合、第１ホルダ端面１２２ｃを第１基材端面１２５ｃよりも短手方向で内側に設けることが難しい。第１ホルダ端面１２２ｃと第１基材端面１２５ｃと離間距離が短手方向で短く、接着剤５１が短手方向で、できるだけ外側に配置されることが望ましい。 In addition, since the adhesive 51 hardens from the outside in the widthwise direction, the adhesion quality may be uneven between the outside and the inside in the widthwise direction. For these reasons, when a resin or the like that does not transmit ultraviolet rays is applied to the substrate 125, it is difficult to provide the first holder end surface 122c inside the first substrate end surface 125c in the lateral direction. It is desirable that the distance between the first holder end surface 122c and the first substrate end surface 125c is short in the lateral direction, and that the adhesive 51 is arranged as far outward as possible in the lateral direction.
　しかしながらその場合、ホルダ１２２の体格が大型化しやすく、さらにホルダ１２２を軸部１２３周りで回転させた時、ホルダ１２２の回転軌跡が大きく、インストルメントパネル４０の内側への搭載性が悪化する。 However, in this case, the size of the holder 122 tends to increase, and when the holder 122 is rotated around the shaft portion 123, the rotational trajectory of the holder 122 is large, and the mountability inside the instrument panel 40 deteriorates.
　これまでに説明したように、接着剤５１は重心１２２ｆを囲むようにして、ホルダ１２２の四隅に設けられている。これによれば、安定して鏡面体１２１をホルダ１２２が保持可能になっている。 As described above, the adhesive 51 is provided at the four corners of the holder 122 so as to surround the center of gravity 122f. According to this, the holder 122 can stably hold the mirror body 121 .
　これまでに説明したように、長手方向に延びる軸部１２３が、ホルダ１２２の長手方向の端に一体的に連結されている。ホルダ１２２が軸部１２３を中心に回転可能になっている。上記したように第１ホルダ端面１２２ｃが第１基材端面１２５ｃよりも短手方向で内側に設けられている。これによれば、反射光の角度を調整可能な程度に、軸部１２３を中心にミラーユニット１２６を回転させたとしても、ホルダ１２２の回転軌跡が小さく、ホルダ１２２がインストルメントパネル４０の内側の電気機器やパネル等に接触しにくくなっている。ミラーユニット１２６のインストルメントパネル４０の内側への搭載性が向上する。 As described above, the longitudinally extending shaft portion 123 is integrally connected to the longitudinal end of the holder 122 . The holder 122 is rotatable around the shaft portion 123 . As described above, the first holder end face 122c is provided inside the first substrate end face 125c in the lateral direction. According to this, even if the mirror unit 126 is rotated about the shaft portion 123 to the extent that the angle of the reflected light can be adjusted, the rotational trajectory of the holder 122 is small, and the holder 122 is located inside the instrument panel 40. It is difficult to come into contact with electrical equipment, panels, etc. Mountability of the mirror unit 126 inside the instrument panel 40 is improved.
　（第２実施形態）
　図１０に示すように、第１ホルダ端面１２２ｃが、第１基材端面１２５ｃよりも短手方向で内側に設けられ、なおかつ、第２ホルダ端面１２２ｄが、第２基材端面１２５ｄよりも長手方向で内側に設けられていてもよい。これによれば、さらにホルダ１２２の小型化ができる。またミラーユニット１２６のインストルメントパネル４０の内側への搭載性がさらに向上する。 (Second embodiment)
As shown in FIG. 10, the first holder end face 122c is provided inward of the first substrate end face 125c in the lateral direction, and the second holder end face 122d is located longitudinally inward of the second substrate end face 125d. may be provided on the inside. According to this, the size of the holder 122 can be further reduced. In addition, the mountability of the mirror unit 126 inside the instrument panel 40 is further improved.
　（第３実施形態）
　図１１に示すように重心１２２ｆを囲むように設けられた接着剤５１のうちの、一部の接着剤５１の長手方向の長さＬ１が、短手方向の長さＬ２よりも長くなっていてもよい。長手方向に広く紫外線が接着剤５１に照射されやすく、接着剤５１の短手方向の幅が狭くなっているために、鏡面体１２１とホルダ１２２とを接着剤５１を介して効率よく接着可能になっている。 (Third embodiment)
As shown in FIG. 11, the length L1 in the longitudinal direction of some of the adhesives 51 provided so as to surround the center of gravity 122f is longer than the length L2 in the lateral direction. good too. The adhesive 51 can be easily irradiated with ultraviolet light widely in the longitudinal direction, and the width of the adhesive 51 in the lateral direction is narrow. It's becoming
　（第４実施形態）
　図１２に示すように重心１２２ｆを囲むように設けられた接着剤５１のうちのすべての長手方向の長さＬ１が短手方向の長さＬ１よりも長くなっていてもよい。鏡面体１２１とホルダ１２２とを接着剤５１を介してより効率よく接着可能になっている。 (Fourth embodiment)
As shown in FIG. 12, the length L1 in the longitudinal direction of all adhesives 51 provided to surround the center of gravity 122f may be longer than the length L1 in the lateral direction. The specular body 121 and the holder 122 can be adhered more efficiently via the adhesive 51 .
　（第５実施形態）
　図１３に示すように重心１２２ｆを覆うように、接着剤５１が鏡面体１２１とホルダ１２２の間に設けられていてもよい。 (Fifth embodiment)
An adhesive 51 may be provided between the mirror body 121 and the holder 122 so as to cover the center of gravity 122f as shown in FIG.
　（第６実施形態）
　図１４に示すようにホルダ１２２の形態が略長方形以外の形態になっていてもよい。その場合においても、接着剤５１が重心１２２ｆを囲むように、もしくは、重心１２２ｆを覆うように、鏡面体１２１とホルダ１２２の間に設けられていることが望ましい。 (Sixth embodiment)
As shown in FIG. 14, the holder 122 may have a shape other than a substantially rectangular shape. Even in that case, it is desirable that the adhesive 51 is provided between the mirror body 121 and the holder 122 so as to surround or cover the center of gravity 122f.
　本開示は、実施形態に準拠して記述されたが、本開示は当該実施形態や構造に限定されるものではないと理解される。本開示は、様々な変形例や均等範囲内の形をも包含する。加えて、様々な組み合わせや形態が本開示に示されているが、それらに一要素のみ、それ以上、あるいはそれ以下、を含む他の組み合わせや形態をも、本開示の範ちゅうや思想範囲に入るものである。 Although the present disclosure has been described in accordance with the embodiments, it is understood that the present disclosure is not limited to such embodiments or structures. The present disclosure also encompasses various modifications and forms within the equivalent range. In addition, while various combinations and configurations are shown in this disclosure, other combinations and configurations, including only one element, more, or less, are within the scope and spirit of this disclosure. is to enter.

Claims (6)

  1. 　表面（１２５ａ）に鏡面（１２１ａ）が設けられ、端面から入射される紫外線を透過可能な板状の基材（１２５）を有する鏡面体（１２１）と、
    　前記紫外線によって硬化する紫外線硬化性を有する接着剤（５１）と、
    　前記接着剤を介して前記基材の裏面（１２５ｂ）側から前記鏡面体を保持する板状のホルダ（１２２）と、を備え、
    　前記鏡面体と前記ホルダとが並ぶ並び方向に直交する直交方向で、前記ホルダの端に設けられるホルダ端面（１２２ｃ）が、前記基材の前記端面である基材端面（１２５ｃ）よりも内側に設けられているミラーユニット。     a mirror body (121) having a plate-like substrate (125) having a surface (125a) provided with a mirror surface (121a) and capable of transmitting ultraviolet rays incident from an end face;
    an ultraviolet curable adhesive (51) that is cured by the ultraviolet light;
    a plate-shaped holder (122) that holds the specular body from the back surface (125b) side of the base material via the adhesive,
    A holder end face (122c) provided at an end of the holder is located inside a substrate end face (125c), which is the end face of the substrate, in an orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged. A mirror unit provided.
  2. 　前記ホルダの重心（１２２ｆ）を囲むように、もしくは、前記重心を覆うように、前記ホルダに前記接着剤が設けられている請求項１に記載のミラーユニット。 The mirror unit according to claim 1, wherein the adhesive is provided on the holder so as to surround or cover the center of gravity (122f) of the holder.
  3. 　前記並び方向と前記直交方向のそれぞれに直交する延長方向における前記接着剤の長さ（Ｌ１）が、前記直交方向における前記接着剤の長さ（Ｌ２）よりも長くなっている請求項１または２に記載のミラーユニット。 3. A length (L1) of said adhesive in an extending direction orthogonal to each of said alignment direction and said orthogonal direction is longer than a length (L2) of said adhesive in said orthogonal direction. Mirror unit described in .
  4. 　前記並び方向と前記直交方向のそれぞれに直交する延長方向に延びて、前記ホルダに連結される軸部（１２３）をさらに備え、
    　前記軸部を中心に、前記ホルダが回転可能になっている請求項１～３のいずれか１項に記載のミラーユニット。     further comprising a shaft portion (123) extending in an extension direction orthogonal to each of the alignment direction and the orthogonal direction and connected to the holder;
    4. The mirror unit according to claim 1, wherein said holder is rotatable about said shaft.
  5. 　画像の表示光を出射する表示装置（１１０）と、
    　前記表示光を反射させて、視認者の前方に位置する投影部材（１０）に投影する反射装置（１２０）と、
    　前記表示装置と前記反射装置の制御を行う制御部（１４０）と、を備え、
    　前記画像を、前記投影部材の前方に虚像（２０）として、前記視認者に対して重畳表示する虚像表示装置（１００）であって、
    　前記反射装置は、
    　表面（１２５ａ）に鏡面（１２１ａ）が設けられ、端面から入射される紫外線を透過可能な板状の基材（１２５）を有する鏡面体（１２１）と、
    　前記紫外線によって硬化する紫外線硬化性を有する接着剤（５１）と、
    　前記接着剤を介して前記基材の裏面（１２５ｂ）側から前記鏡面体を保持する板状のホルダ（１２２）と、を備え、
    　前記鏡面体と前記ホルダとが並ぶ並び方向に直交する直交方向で、前記ホルダの端に設けられるホルダ端面（１２２ｃ）が、前記基材の前記端面である基材端面（１２５ｃ）よりも内側に設けられている虚像表示装置。     a display device (110) that emits image display light;
    a reflecting device (120) that reflects the display light and projects it onto a projection member (10) positioned in front of the viewer;
    A control unit (140) for controlling the display device and the reflection device,
    A virtual image display device (100) for superimposing and displaying the image to the viewer as a virtual image (20) in front of the projection member,
    The reflector is
    a mirror body (121) having a plate-like substrate (125) having a surface (125a) provided with a mirror surface (121a) and capable of transmitting ultraviolet rays incident from an end face;
    an ultraviolet curable adhesive (51) that is cured by the ultraviolet light;
    a plate-shaped holder (122) that holds the specular body from the back surface (125b) side of the base material via the adhesive,
    A holder end face (122c) provided at an end of the holder is located inside a substrate end face (125c), which is the end face of the substrate, in an orthogonal direction perpendicular to the direction in which the mirror body and the holder are arranged. A virtual image display device provided.
  6. 　表面（１２５ａ）に鏡面（１２１ａ）が設けられ、端面から入射される紫外線を透過可能な板状の基材（１２５）を有する鏡面体（１２１）と、前記紫外線によって硬化する紫外線硬化性を有する接着剤（５１）と、前記鏡面体を保持する板状のホルダ（１２２）と、を備えるミラーユニット（１２６）の製造方法であって、
    　前記ホルダの一面（１２２ａ）に前記接着剤を塗布し、
    　前記ホルダの端に設けられるホルダ端面（１２２ｃ）が、前記基材の前記端面である基材端面（１２５ｃ）よりも内側に設けられるよう、前記鏡面体を前記接着剤に搭載し、
    　前記鏡面体と前記ホルダとが並ぶ並び方向に直交する直交方向で、前記基材端面に向かって前記紫外線を照射することで、前記基材を透過した前記紫外線によって、前記鏡面体と前記ホルダとを前記接着剤を介して接着するミラーユニットの製造方法。     A mirror surface (121) having a mirror surface (121a) provided on a surface (125a) and having a plate-shaped base material (125) capable of transmitting ultraviolet rays incident from an end surface, and having an ultraviolet curability that is cured by the ultraviolet rays. A method for manufacturing a mirror unit (126) comprising an adhesive (51) and a plate-shaped holder (122) for holding the mirror body,
    applying the adhesive to one surface (122a) of the holder;
    mounting the specular body on the adhesive so that the holder end surface (122c) provided at the end of the holder is provided inside the substrate end surface (125c), which is the end surface of the substrate;
    By irradiating the ultraviolet rays toward the end surface of the base material in a direction orthogonal to the direction in which the mirror body and the holder are arranged, the ultraviolet rays transmitted through the base material irradiate the mirror body and the holder. is adhered via the adhesive.
PCT/JP2023/002105 2022-02-14 2023-01-24 Mirror unit, virtual image display device, and mirror unit production method WO2023153197A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02207206A (en) * 1989-02-07 1990-08-16 Matsushita Electric Ind Co Ltd Optical parts and its manufacture
JPH0572456A (en) * 1991-04-10 1993-03-26 Ricoh Co Ltd Roof mirror lens array
JP2009272384A (en) * 2008-05-01 2009-11-19 Mejiro Precision:Kk Irradiation method, and method and apparatus for manufacturing wiring board
JP2016218163A (en) * 2015-05-18 2016-12-22 日本精機株式会社 Mirror unit and display device
JP2018055038A (en) * 2016-09-30 2018-04-05 日本精機株式会社 Mirror unit for head-up display devices
JP2020197602A (en) * 2019-05-31 2020-12-10 ミネベアミツミ株式会社 concave mirror

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02207206A (en) * 1989-02-07 1990-08-16 Matsushita Electric Ind Co Ltd Optical parts and its manufacture
JPH0572456A (en) * 1991-04-10 1993-03-26 Ricoh Co Ltd Roof mirror lens array
JP2009272384A (en) * 2008-05-01 2009-11-19 Mejiro Precision:Kk Irradiation method, and method and apparatus for manufacturing wiring board
JP2016218163A (en) * 2015-05-18 2016-12-22 日本精機株式会社 Mirror unit and display device
JP2018055038A (en) * 2016-09-30 2018-04-05 日本精機株式会社 Mirror unit for head-up display devices
JP2020197602A (en) * 2019-05-31 2020-12-10 ミネベアミツミ株式会社 concave mirror

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