WO2024101184A1 - Dispositif d'irradiation d'image - Google Patents

Dispositif d'irradiation d'image Download PDF

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Publication number
WO2024101184A1
WO2024101184A1 PCT/JP2023/038874 JP2023038874W WO2024101184A1 WO 2024101184 A1 WO2024101184 A1 WO 2024101184A1 JP 2023038874 W JP2023038874 W JP 2023038874W WO 2024101184 A1 WO2024101184 A1 WO 2024101184A1
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WO
WIPO (PCT)
Prior art keywords
image
support member
unit
projection device
generating unit
Prior art date
Application number
PCT/JP2023/038874
Other languages
English (en)
Japanese (ja)
Inventor
富晴 平野
佳憲 澤
貴智 藤吉
秀樹 原
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2022179366A external-priority patent/JP2024068780A/ja
Priority claimed from JP2022180853A external-priority patent/JP2024070393A/ja
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Publication of WO2024101184A1 publication Critical patent/WO2024101184A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/14—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing polarised light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays

Definitions

  • This disclosure relates to an image projection device configured to project a display image onto an image display unit.
  • in-vehicle image projection devices that are arranged in the vehicle interior and project a display image onto an image display section, such as the front window (i.e., windshield) or a translucent plate arranged on the inside of the vehicle interior.
  • Patent Document 1 describes such an image projection device as comprising an image generating unit that generates an image for display, a reflector that reflects the light emitted from the image generating unit toward the image display section, and a housing that contains the reflector.
  • the image projection device described in Patent Document 1 has a light-transmitting cover attached to the upper opening of its housing, which allows light to be irradiated onto the image display unit while ensuring that the space inside the device is dust-proof.
  • the reflector is supported rotatably about an axis extending in the left-right direction relative to the housing, and an actuator for rotating the reflector about the axis is supported by the housing.
  • the actuator is connected to the reflector via a drive force transmission member arranged to the side of the reflector.
  • sunlight can enter the space inside the device through the front window and the translucent cover and reach the reflector. If sunlight that enters the space inside the device in this way is reflected by the reflector and reaches the image generation unit, this can impair the function of the image generation unit.
  • the image projection device is configured with a polarizing sheet attached to the surface of the translucent cover, the amount of sunlight entering the space inside the device can be reduced, which effectively prevents the function of the image generation unit from being impaired.
  • the drive force transmission member is disposed to the side of the reflector, so the left-right width of the reflector is narrowed by the space required for disposing this drive force transmission member, and as a result, the left-right width of the display image projected on the image display unit is also narrowed by that amount.
  • One of the objectives of the present disclosure is to provide an image projection device that is configured to project a display image on an image display section using light emitted from an image generation unit, and that can effectively prevent the functionality of the image generation unit from being impaired due to an inexpensive configuration.
  • One of the objectives of the present disclosure is to provide an image projection device that is configured to project a display image on an image display section using light emitted from an image generation unit, and that can project a display image with a wide left-right width.
  • the present disclosure aims to achieve the above objective by devising an innovative arrangement of polarizing plates.
  • the image projection device configured to project a display image on an image display unit
  • the display device includes an image generating unit that generates an image for display, a reflecting mirror that reflects light emitted from the image generating unit toward the image display unit, and a unit support member that supports the image generating unit, a polarizing plate is disposed between the reflecting mirror and the image generating unit; an opening for transmitting light emitted from the image generating unit is formed in the unit support member; The polarizing plate is supported by the unit support member around the opening.
  • image projection device is not particularly limited in its specific use, so long as it is configured to project a display image on the image display unit, and can be used, for example, as an in-vehicle head-up display.
  • the “image display unit” is not particularly limited in its specific configuration, so long as it is configured to project a display image, and for example, a translucent plate placed on the front window of the vehicle or on the inside of the passenger compartment can be used.
  • the specific configuration of the "reflecting mirror” is not particularly limited as long as it is configured to reflect the light emitted from the image generating unit toward the image display unit.
  • the "polarizing plate” may be made of a rigid plate or a flexible sheet-like member.
  • the present disclosure aims to achieve the above objective by implementing ingenuity in the arrangement of the actuator and the driving force transmission member.
  • the image projection device configured to project a display image on an image display unit
  • the display device includes an image generating unit that generates an image for display, a reflecting mirror that reflects light emitted from the image generating unit toward the image display unit, and a housing that accommodates the reflecting mirror,
  • the reflecting mirror is supported rotatably about an axis extending in the left-right direction relative to the housing, an actuator for rotating the reflecting mirror about the axis is supported by the housing;
  • the actuator is configured to transmit a driving force to the reflecting mirror via a driving force transmission member,
  • the actuator and the driving force transmission member are disposed at positions inside both side edges of the reflecting mirror in the left-right direction.
  • image projection device is not particularly limited in its specific use, so long as it is configured to project a display image on the image display unit, and can be used, for example, as an in-vehicle head-up display.
  • the “image display unit” is not particularly limited in its specific configuration, so long as it is configured to project a display image, and for example, a translucent plate placed on the front window of the vehicle or on the inside of the passenger compartment can be used.
  • the “reflecting mirror” is not particularly limited in terms of the specific shape of its reflecting surface, so long as it is configured to reflect the light emitted from the image generating unit toward the image display unit.
  • the specific configuration and arrangement of the "driving force transmission member” is not particularly limited, as long as it is configured to transmit the driving force of the actuator to the reflector while being positioned inside both side edges of the reflector in the left-right direction.
  • the image projection device comprises an image generating unit that generates an image for display, a reflecting mirror that reflects the light emitted from the image generating unit towards the image display section, and a unit support member that supports the image generating unit.
  • a polarizing plate is disposed between the reflecting mirror and the image generating unit.
  • the unit support member has an opening formed therein for transmitting the light emitted from the image generating unit.
  • the polarizing plate is supported by the unit support member around the periphery of the opening.
  • the polarizing plate can reduce the amount of light, thereby effectively preventing the functionality of the image generating unit from being impaired.
  • the polarizing plate is supported by the unit support member around the opening formed in the unit support member, the above-mentioned effects can be obtained while minimizing the size of the polarizing plate, thereby enabling the cost of the image projection device to be reduced.
  • an image projection device configured to project a display image on an image display section using light emitted from an image generation unit, it is possible to effectively prevent the functionality of the image generation unit from being impaired due to an inexpensive configuration.
  • the image generating unit further includes a liquid crystal panel and an optical unit that illuminates the liquid crystal panel with backlight, the image that is the basis for the display image can be generated efficiently.
  • the unit support member is configured by assembling a first support member that supports the liquid crystal panel and a second support member that supports the optical unit, and the polarizing plate is supported by the first support member, the following effects can be obtained.
  • the unit support member by configuring the unit support member by assembling a first support member that supports the liquid crystal panel and a second support member that supports the optical unit, it is possible to eliminate the need to assemble the optical unit to the unit support member around the liquid crystal panel, thereby preventing the unit support member from becoming too large.
  • the polarizing plate is supported by the first support member, it is possible to easily and reliably support the polarizing plate by the unit support member.
  • the polarizing plate is configured to transmit polarized light that vibrates in the same direction as the polarized light emitted from the liquid crystal panel, the amount of sunlight that reaches the liquid crystal panel can be reduced without reducing the amount of light emitted from the image generating unit toward the reflector. This makes it possible to maintain the functionality of the image generating unit to the maximum extent.
  • the polarizing plate is arranged to extend in a direction inclined relative to the extension direction of the liquid crystal panel, it is possible to effectively prevent sunlight reflected on the surface of the polarizing plate from inadvertently forming unnecessary images other than the display image on the image display section or its surrounding area.
  • the unit support member supports the image generating unit via a heat sink, the deterioration of the function of the image generating unit due to heat can be effectively suppressed.
  • the heat sink comprises a main body to which the image generating unit is fixed and at least one flange portion formed to extend from the main body, while at least one slit is formed as the unit support member, and the image generating unit is fixed to the unit support member by screws at the main body with at least one flange portion inserted into at least one slit, the image generating unit can be positioned and fixed to the unit support member while minimizing the number of screw fixing points.
  • the image projection device also includes an image generating unit that generates an image for display, a reflector that reflects light emitted from the image generating unit toward the image display section, and a housing that contains the reflector.
  • the reflector is supported so as to be rotatable about an axis that extends in the left-right direction relative to the housing.
  • An actuator for rotating the reflector about the axis is supported on the housing. This makes it possible to project the image for display at an appropriate position on the image display section by driving the actuator.
  • the driving force of the actuator is transmitted to the reflector via a driving force transmission member.
  • the actuator and driving force transmission member are disposed inward from both side edges of the reflector in the left-right direction. This makes it possible to maximize the left-right width of the reflector in the internal space of the housing. This also makes it possible to maximize the left-right width of the display image projected on the image display unit.
  • the display image in an image projection device configured to project a display image on an image display section using light emitted from an image generation unit, the display image can be projected with a wide left-right width.
  • the actuator is configured to reciprocate the drive force transmission member in the front-to-rear direction of the device, and the drive force transmission member is arranged below the reflector and connected to the reflector in a manner that allows it to rotate about the axis, it becomes easy to arrange the actuator and drive force transmission member in a layout that does not prevent the light emitted from the image generating unit from entering the reflector.
  • the actuator is configured to include an actuator body fixed to the housing and an output shaft member configured to protrude downward from the actuator body and move back and forth in the front-to-rear direction of the device, it becomes even easier to arrange the actuator and drive force transmission member in a layout that does not impede the light emitted from the image generating unit from being incident on the reflector.
  • the driving force transmission member is formed with an H-shaped cross section extending in the front-to-rear direction of the device, it is possible to easily slide the driving force transmission member along the inner surface of the lower wall of the housing while ensuring sufficient rigidity of the driving force transmission member, thereby efficiently transmitting the driving force of the actuator to the reflector.
  • the actuator can be efficiently positioned in the internal space of the housing, thereby minimizing the front-to-rear width of the housing.
  • FIG. 1 is a side cross-sectional view showing an image projection device according to a first embodiment of the present disclosure mounted on a vehicle.
  • FIG. 2 is a view taken in the direction of the arrow II in FIG.
  • FIG. 3 is a detailed view of part III of FIG. IV-IV line cross-sectional view of FIG. 5 is a cross-sectional view taken along line V-V of FIG.
  • FIG. 4 is a view similar to FIG. 3, showing a first modification of the above embodiment;
  • FIG. 5 is a diagram similar to FIG. 4, showing the first modified example.
  • FIG. 6 is a diagram similar to FIG. 5, showing the first modified example.
  • FIG. 11 is a side cross-sectional view showing the state of assembly of the image projection device according to the first modified example.
  • FIG. 11 is a side cross-sectional view showing the state of assembly of the image projection device according to the first modified example.
  • FIG. 4 is a view similar to FIG. 3, showing a second modification of the embodiment;
  • FIG. 4 is a view similar to FIG. 3, showing a third modification of the embodiment;
  • FIG. 5 is a view similar to FIG. 4, showing the third modified example.
  • FIG. 13 is a rear view showing the state of assembly of the image projection device according to the third modified example.
  • FIG. 11 is a side cross-sectional view showing an image projection device according to a second embodiment of the present disclosure mounted on a vehicle.
  • Detail of part XV in FIG. 14 . 16 is a cross-sectional view taken along line XVI of FIG.
  • FIG. 15 is a detailed view of the main part of the embodiment.
  • FIG. 16 is a view similar to FIG. 15, showing a modification of the above embodiment;
  • FIG. 1 is a side cross-sectional view showing an image projection device 10 according to the first embodiment in a state where it is mounted on a vehicle 100.
  • Fig. 2 is a view taken in the direction of an arrow II in Fig. 1 .
  • the image projection device 10 is an in-vehicle head-up display, and is configured to project a display image PIC as a virtual image on a display area 102A of a front window 102 serving as an image display unit when placed in the passenger compartment of a vehicle 100.
  • the optical path R shown in FIG. 1 is the optical path through which the driver 2 visually recognizes the display image PIC projected on the display area 102A of the front window 102 by the image projection device 10.
  • the display area 102A is positioned in the lower area of the windshield 102 and in front of the steering wheel 104, so that the driver 2 of the vehicle 100 can easily visually recognize it.
  • FIG. 2 shows a specific example of the display image PIC in which the vehicle speed (50 Km/h) is displayed together with an arrow pointing to the left.
  • the image projection device 10 is positioned in front of the steering wheel 104 and near the bottom of the windshield 102.
  • the image projection device 10 includes an image generation unit 20 that generates an image that is the basis of the display image PIC, a reflector 40 that reflects the light emitted from the image generation unit 20 toward the display area 102A of the front window 102, a housing 50 that contains the image generation unit 20 and the reflector 40, and a translucent cover 60 attached to the housing 50.
  • FIG. 3 is a detailed view of part III in FIG. 1
  • FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3
  • FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4.
  • the housing 50 is formed such that the second housing 54 is assembled to the first housing 52, which is formed to open upward.
  • the second housing 54 has an outer peripheral flange portion 54b, and is assembled to the first housing 52 with this outer peripheral flange portion 54b abutting against the upper end surface of the peripheral wall portion 52a of the first housing 52.
  • the first and second housings 52, 54 are both made of opaque resin moldings.
  • the second housing 54 has an upper opening 54a formed therein to allow the reflected light from the reflector 40 to pass through toward the display area 102A.
  • the light-transmitting cover 60 is composed of a colorless, transparent resin panel. This light-transmitting cover 60 is positioned so as to cover the upper opening 54a of the second housing 54, in a state in which it is curved downward and tilted slightly upward toward the rear of the device. This light-transmitting cover 60 allows the light emitted from the image generating unit 20 reflected by the reflector 40 to enter the display area 102A, while ensuring that the internal space 12 of the housing 50 is dust-proof.
  • the second housing 54 is formed with a light-shielding piece 54c that extends diagonally downward and forward from the rear edge of the upper opening 54a toward the internal space 12. This light-shielding piece 54c prevents sunlight S that enters the internal space 12 through the front window 102 and the translucent cover 60 from reaching the image generating unit 20 as direct light.
  • the image generating unit 20 is disposed in the rear region of the internal space 12, and the reflector 40 is disposed in the front region of the internal space 12.
  • the reflector 40 is configured as a concave mirror, and its reflecting surface 40a has a horizontally elongated rectangular shape when viewed from the front of the device.
  • the image generating unit 20 is positioned so that it is located at the center of the reflector 40 in the left-right direction.
  • the image generating unit 20 includes a liquid crystal panel 22 and an optical unit 30 that illuminates the liquid crystal panel 22 with backlight from its rear side (i.e., the rear side of the device).
  • the image generating unit 20 is configured to generate an image that is the basis of the display image PIC on the liquid crystal panel 22 using backlight illumination from the optical unit 30.
  • the image generating unit 20 is supported by a unit support member 70, which is supported by the first housing 52.
  • the unit support member 70 is disposed along a vertical plane perpendicular to the front-rear direction of the device, and is fixed to the first housing 52 at both left and right ends. This fixing is performed by tightening screws 72 from the rear side of the device to two pairs of left and right bosses 70c formed at the top and bottom of both left and right ends of the unit support member 70.
  • the liquid crystal panel 22 has a horizontally elongated rectangular shape and is fixed to the rear surface of the unit support member 70 while being arranged along a vertical plane perpendicular to the front-to-rear direction of the device. This liquid crystal panel 22 is configured to transmit the backlight illumination light from the optical unit 30 as polarized light that vibrates in the horizontal direction.
  • the unit support member 70 has an opening 70a formed therein to define the illumination range of the backlight emitted from the optical unit 30.
  • This opening 70a has a horizontally long rectangular opening shape, which allows the backlight emitted from the optical unit 30 to be incident on the reflecting surface 40a of the reflector 40 via the liquid crystal panel 22.
  • the opening 70a is formed so as to taper toward the front of the device.
  • Horizontal flanges 70b are formed on both the upper and lower ends of the unit support member 70, extending toward the rear of the device, and the liquid crystal panel 22 is positioned by these pair of upper and lower horizontal flanges 70b.
  • the optical unit 30 includes a light-emitting element 32 as a light source, a substrate 34 on which the light-emitting element 32 is mounted, a lens 36 that controls the deflection of the light emitted from the light-emitting element 32, and a lens holder 38 that supports the lens 36.
  • the lens 36 has a vertical cross-sectional shape like a biconvex lens and a horizontal cross-sectional shape like a plano-convex lens, which allows the backlight emitted from the optical unit 30 to be efficiently incident on the reflecting surface 40a of the reflector 40 via the liquid crystal panel 22.
  • the lens 36 is supported by the lens holder 38 at its outer peripheral flange portion 36a.
  • the substrate 34 is supported at its rear surface by the heat sink 24, with the light-emitting surface of the light-emitting element 32 facing the front of the device and aligned along a vertical plane perpendicular to the front-to-rear direction of the device.
  • the lens holder 38 is also supported at its rear end surface by the heat sink 24.
  • the heat sink 24 has a main body 24A that extends flat along a vertical plane perpendicular to the front-to-rear direction of the device, and a number of heat dissipation fins 24B that extend from the main body 24A at intervals in the left-right direction toward the rear of the device.
  • the optical unit 30 is fixed at both its left and right ends to the unit support member 70. This is done by tightening the screws 74 from the rear of the device while the tab-shaped attachment parts 38a formed at the top and bottom of both the left and right sides of the lens holder 38 are abutted against two pairs of left and right boss parts 70d formed on the unit support member 70.
  • a polarizing plate 80 is disposed between the reflector 40 and the image generating unit 20 in the internal space 12 of the housing 50.
  • This polarizing plate 80 is a rigid plate-like member that is disposed in a forward tilted state with respect to a vertical plane perpendicular to the front-to-rear direction of the device, and is supported by the unit support member 70 around the opening 70a.
  • an annular flange portion 70e is formed on the front surface of the unit support member 70, which protrudes toward the front of the device so as to surround the opening 70a, and the polarizing plate 80 is positioned and supported in a forward tilted state by the front end surface of this annular flange portion 70e.
  • the polarizing plate 80 is configured to transmit the backlight illumination light from the optical unit 30 that has passed through the liquid crystal panel 22 as polarized light that vibrates in the horizontal direction (i.e., as polarized light that vibrates in the same direction as the polarized light that is emitted from the liquid crystal panel 22).
  • the reflector 40 is supported so as to be rotatable about an axis Ax that extends in the left-right direction relative to the first housing 52.
  • An actuator 42 for rotating the reflector 40 around the axis Ax is fixed to the first housing 52. This fixing is performed by fastening screws 44 to the bottom wall portion 52b of the first housing 52 at tab-shaped mounting portions 42b formed at two locations on the actuator 42.
  • the reflector 40 has vertical flanges 40b formed to protrude rearward from both the left and right sides of the rear surface of the reflecting surface 40a (i.e., the surface facing the front of the device), and a pair of left and right shafts 40c, 40d are formed on the pair of left and right vertical flanges 40b, protruding outward in the left-right direction along the axis Ax.
  • the left shaft 40c (right side when viewed from the front of the device) is placed on a mounting portion 52c formed on the inner surface of the peripheral wall portion 52a of the first housing 52, and the right shaft 40d is directly connected to the output shaft 42a of the actuator 42.
  • the mounting portion 52c has a roughly U-shaped mounting surface, and the second housing 54 is formed with an abutment portion (not shown) that abuts from above against the shaft portion 40c placed on the mounting portion 52c to position the reflector 40.
  • the image projection device 10 includes an image generating unit 20 that generates a display image PIC, a reflector 40 that reflects the light emitted from the image generating unit 20 toward a display area 102A (image display section) of the front window 102, and a unit support member 70 that supports the image generating unit 20.
  • a polarizing plate 80 is disposed between the reflector 40 and the image generating unit 20.
  • the unit support member 70 has an opening 70a formed therein to transmit the light emitted from the image generating unit 20.
  • the polarizing plate 80 is supported by the unit support member 70 around the opening 70a. This provides the following effects.
  • the polarizing plate 80 between the reflector 40 and the image generating unit 20, even if sunlight S reflected by the reflector 40 reaches the image generating unit 20 as shown in FIG. 3, the amount of light can be reduced by the polarizing plate 80. This effectively prevents the function of the image generating unit 20 from being impaired.
  • the polarizing plate 80 is supported by the unit support member 70 around the opening 70a formed in the unit support member 70, the above-mentioned effect can be obtained while minimizing the size of the polarizing plate 80. This allows the cost of the image projection device 10 to be reduced.
  • an image projection device 10 configured to project a display image PIC onto a display area 102A of a front window 102 using light emitted from an image generation unit 20, it is possible to effectively prevent the functionality of the image generation unit 20 from being impaired due to an inexpensive configuration.
  • the reflector 40 is configured as a concave mirror, and the sunlight S reflected by the reflecting surface 40a reaches the image generating unit 20 as convergent light, so it is extremely effective to place a polarizing plate 80 between the reflector 40 and the image generating unit 20.
  • the image projection device 10 has an image generating unit 20 that includes a liquid crystal panel 22 and an optical unit 30 that illuminates the liquid crystal panel 22 with backlight, so that the image that is the basis for the display image PIC can be generated efficiently.
  • the polarizing plate 80 is configured to transmit polarized light that vibrates in the same direction as the polarized light emitted from the liquid crystal panel 22, so it is possible to reduce the amount of sunlight S that reaches the liquid crystal panel 22 without reducing the amount of light emitted from the image generating unit 20 toward the reflector 40. This makes it possible to maintain the functionality of the image generating unit 20 to the maximum extent.
  • the polarizing plate 80 is arranged to extend in a direction inclined relative to the extension direction of the liquid crystal panel 22, so that it is possible to effectively prevent sunlight S reflected on the surface of the polarizing plate 80 from inadvertently forming unnecessary images other than the display image PIC in the display area 102A of the front window 102 or its surrounding area.
  • the polarizing plate 80 is described as being made of a rigid plate, but it can also be made of a flexible sheet-like member, or the polarizing sheet can be attached to a translucent plate.
  • FIGS. 6, 7, and 8 are similar to FIG. 3, 4, and 5 and show an image projection device 110 according to this modified example.
  • the basic configuration of the image projection device 110 in this modified example is similar to that of the above embodiment, but the support structure of the image generation unit 120 is different from that of the above embodiment.
  • a unit support member 170 that supports the image generating unit 120 housed in the housing 150 is supported by the first housing 152, but this unit support member 170 differs from the above embodiment in that it is configured by assembling a first support member 172 that supports the liquid crystal panel 22 and a second support member 174 that supports the optical unit 130.
  • the second support member 174 is configured as a plate-like member extending along a vertical plane perpendicular to the front-rear direction of the device, and has two pairs of upper and lower boss portions 174d formed on its rear surface.
  • the optical unit 130 has a pair of left and right tab-shaped mounting portions 138a formed at two locations, upper and lower, on its lens holder 138.
  • the optical unit 130 is fixed to the second support member 174 by tightening the screws 74 from the rear side of the device with the two pairs of upper and lower mounting portions 138a abutting against the two pairs of upper and lower boss portions 174d.
  • the two pairs of upper and lower boss portions 174d are formed in positions that overlap with the liquid crystal panel 22 when the device is viewed from the front.
  • the image projection device 110 also includes a polarizing plate 80 similar to that in the above embodiment, and this polarizing plate 80 is supported by a first support member 172.
  • the support structure of the polarizing plate 80 by this first support member 172 is similar to that in the above embodiment, and this first support member 172 is formed with an annular flange portion 172e similar to that in the above embodiment.
  • an opening 172a is formed in the first support member 172 to define the illumination range of the backlight emitted from the optical unit 130.
  • This opening 172a has the same shape as the opening 70a in the above embodiment.
  • an opening 174h having a larger opening shape than the opening 172a is formed in the second support member 174, so that the backlight irradiation light from the optical unit 130 is not hindered from entering the opening 172a.
  • Figure 9 is a side cross-sectional view showing the assembly of the first support member 172 and the second support member 174.
  • the first support member 172 and the second support member 174 are assembled by lance engagement at two locations on the left and right sides of the upper and lower sides of the liquid crystal panel 22.
  • first support member 172 is formed with lance pieces 172f that extend toward the rear of the device at two locations on the left and right sides of the upper and lower ends
  • second support member 174 is formed with engagement holes 174g at two locations on the left and right sides of both the upper and lower ends for inserting and engaging the lance pieces 172f.
  • the unit support member 170 is supported by tightening screws 72 from the rear side of the device against two pairs of left and right bosses 172c formed at the top and bottom of both the left and right ends of the first support member 172.
  • the image projection device 110 according to this modified example can also effectively prevent the functionality of the image generation unit 120 from being impaired by an inexpensive configuration.
  • the unit support member 170 is constructed by assembling a first support member 172 that supports the liquid crystal panel 22 and a second support member 174 that supports the optical unit 130, thereby eliminating the need to assemble the optical unit 130 to the unit support member 170 around the liquid crystal panel 22, thereby preventing the unit support member 170 from becoming too large. This also makes it possible to narrow the left-right width between the peripheral wall portions 152a in the rear region of the first housing 152.
  • the polarizing plate 80 since the polarizing plate 80 is supported by the first support member 172, the polarizing plate 80 can be easily and reliably supported by the unit support member 170.
  • the optical unit 130 is fixed to the second support member 174 by screwing at the boss portions 174d formed at four locations on the second support member 174, so that the optical unit 130 can be reliably supported by the unit support member 170.
  • FIG. 10 is a diagram similar to FIG. 3, showing an image projection device 210 according to this modified example.
  • the basic configuration of the image projection device 210 in this modified example is similar to that of the first modified example described above, but the configuration of the unit support member 270 that supports the image generation unit 220 is partially different from that of the first modified example described above.
  • the image generating unit 220 of this modified example has a similar configuration to the image generating unit 120 of the first modified example
  • the unit support member 270 of this modified example is also configured by assembling a first support member 272 that supports the liquid crystal panel 22 and a second support member 274 that supports the optical unit 130, but differs from the first modified example in that an opening 274a for defining the irradiation range of the backlight irradiation light from the optical unit 130 is formed in the second support member 274.
  • This opening 274a has approximately the same opening shape as the opening 172a of the first modified example. Note that this opening 70a is formed so as to taper toward the rear of the device.
  • the first support member 272 of this modified example has an annular flange portion 272e similar to the annular flange portion 172e of the first modified example described above, but in the center of the first support member 272, instead of the opening portion 172a of the first modified example described above, a horizontally elongated rectangular opening portion 272h is formed that follows the shape of the inner peripheral surface of the annular flange portion 272e.
  • FIGS. 11 and 12 are similar to FIGS. 3 and 4, but show an image projection device 310 according to this modified example.
  • FIG. 13 is a rear view showing the assembly of the image projection device 310.
  • the basic configuration of the image projection device 310 in this modified example is similar to that of the above embodiment, but the support structure of the image generation unit 320 is partially different from that of the above embodiment.
  • the image projection device 310 also includes an image generation unit 320, which has a similar configuration to the image generation unit 20 of the above embodiment, housed in a housing 350, but differs from the above embodiment in that the image generation unit 320 is directly supported on the first housing 352 via a heat sink 324.
  • the unit support member that supports the image generation unit 320 is configured as the first housing 352.
  • the heat sink 324 is constructed as a bent metal plate.
  • the heat sink 324 has a vertical body portion 324A1 extending along a vertical plane perpendicular to the front-to-rear direction of the device, a horizontal body portion 324A2 extending along a horizontal plane from the lower end position of the vertical body portion 324A1 toward the front of the device, and a pair of left and right vertical flange portions 324B extending along the vertical plane from the left and right side edges of the vertical body portion 324A1 toward the rear of the device.
  • the first housing 352 has a plurality of slits 352d formed in the peripheral wall portion 352a located on the rear side of the device in the internal space 12. These slits 352d are formed to extend in the up-down direction at equal intervals in the left-right direction.
  • the slits 352d extend from a position near the top of the lower wall portion 352b of the first housing 352 to the upper end surface of the peripheral wall portion 352a, and each slit 352d is formed with a left-right width slightly wider than the plate thickness of the heat sink 324.
  • the heat sink 324 is fixed to the first housing 352 in a state where its vertical body portion 324A1 is positioned near the front of the device on the peripheral wall portion 352a of the first housing 352 and its pair of left and right vertical flange portions 324B are inserted into a pair of left and right slits 352d located on the outermost sides of the plurality of slits 352d.
  • the horizontal body portion 324A2 is placed on the lower wall portion 352b of the first housing 352 and fixed to the first housing 352 in this state.
  • This fixing is performed by inserting a screw 76 into a screw insertion hole 324A2a formed in the left-right center position near the front edge of the horizontal body portion 324A2 of the heat sink 324 and screwing it into a boss portion 352e formed on the lower wall portion 352b of the first housing 352.
  • the vertical body portion 324A1 of the heat sink 324 is formed to extend above the optical unit 30. Meanwhile, at the rear end of the second housing 354, a pair of left and right vertical ribs 354d extending downward are formed along a vertical plane extending in the front-rear direction of the device. When the second housing 354 is attached to the first housing 352, the lower end faces of the pair of left and right vertical ribs 354d abut against the upper end face of the vertical body portion 324A1 of the heat sink 324, thereby positioning the heat sink 324 in the vertical direction.
  • the lower end faces of the pair of left and right vertical flange portions 324B inserted into the pair of left and right slits 352d abut against the bottom faces of the multiple slits 352d, thereby also positioning the heat sink 324 in the vertical direction.
  • the heat sink 324 is also positioned in the left-right direction by inserting the pair of left and right vertical flange portions 324B into the pair of left and right slits 352d that are located on the outermost sides of the multiple slits 352d.
  • the image projection device 310 of this modified example includes a support member 390 having a configuration substantially similar to the unit support member 70 of the above embodiment, and the liquid crystal panel 22 and the polarizing plate 80 are supported by this support member 390 together with the optical unit 30.
  • This support member 390 like the unit support member 70 of the above embodiment, has an opening 390a formed therein to define the illumination range of the backlight emitted from the optical unit 30, and horizontal flange portions 390b are formed at both the top and bottom ends thereof, extending toward the rear of the device. Furthermore, an annular flange portion 390e is formed on the front surface of this support member 390, surrounding the opening 70a and protruding toward the front of the device; however, unlike the unit support member 70 of the above embodiment, there is no portion that protrudes beyond the annular flange portion 70e on either side.
  • the support member 390 has a width extending to both sides of the annular flange portion 390e, and has the function of supporting the liquid crystal panel 22 and the polarizing plate 80, but does not have the function of supporting the image generating unit 320 relative to the first housing 352.
  • the optical unit 30 is fixed to the support member 390 at two locations, top and bottom, on both the left and right ends.
  • This fixing structure is the same as the fixing structure of the optical unit 30 to the unit support member 70 in the above embodiment.
  • the image projection device 310 can effectively prevent the functionality of the image generation unit 320 from being impaired by an inexpensive configuration.
  • the image generating unit 320 is supported by the first housing 352 as a unit support member via the heat sink 324, deterioration of the function of the image generating unit 320 due to heat can be effectively suppressed.
  • the heat sink 324 comprises a vertical main body portion 324A1 (main body portion) to which the image generating unit 320 is fixed, and a pair of left and right vertical flange portions 324B formed to extend from this vertical main body portion 324A1 toward the rear of the device to the external space of the housing 350, so that the pair of left and right vertical flange portions 324B function efficiently as heat dissipation fins, thereby enabling heat dissipation from the image generating unit 320.
  • the heat sink 324 is fixed to the lower wall portion 352b of the first housing 352 with the horizontal main body portion 324A2 placed on the lower wall portion 352b of the first housing 352 with the pair of left and right vertical flange portions 324B inserted into the pair of left and right slits 352d located on the outermost sides of the multiple slits 352d formed in the first housing 352, so that the image generating unit 320 can be positioned and fixed to the first housing 352 as a unit support member while minimizing the number of screw fixing points.
  • the lower end surfaces of a pair of left and right vertical ribs 354d formed on the second housing 354 abut against the upper end surface of the vertical main body portion 324A1 of the heat sink 324, thereby positioning the heat sink 324 in the up-down direction, so that the number of screw fastening points can be set to one point.
  • the image generating unit 320 is directly supported by the first housing 352, which serves as a unit support member, via the heat sink 324, but since the optical unit 30 is fixed to the support member 390, this support member 390 is also an element that constitutes part of the unit support member.
  • multiple slits 352d are formed in the peripheral wall portion 352a of the first housing 352, but it is also possible to form a single recess instead of these multiple slits 352d.
  • the heat sink 324 is described as being configured as a bent metal plate product, but it can also be configured as a die-cast molded product, etc., in which case, a single or multiple heat dissipation fins can be formed.
  • the image generating unit 320 is described as being supported on the first housing 352 as a unit support member via the heat sink 324, but it is also possible for the image generating unit 320 to be supported on a unit support member disposed in the internal space 12 of the housing 350 via the heat sink 324.
  • FIG. 14 is a side cross-sectional view showing an image projection device 410 according to the second embodiment mounted on a vehicle 100.
  • FIG. 15 is a detailed view of part XV in FIG. 14, and
  • FIG. 16 is a cross-sectional view taken along line XVI in FIG. 15.
  • FIG. 17 is a detailed view of the main parts of FIG. 15.
  • the reflector 40 is supported so as to be rotatable about an axis Ax that extends in the left-right direction relative to the first housing 52.
  • an actuator 90 for rotating the reflector 40 about the axis Ax is supported on the first housing 52.
  • the reflector 40 has vertical flanges 140b formed to protrude rearward from the left and right side edges of the rear surface of the reflecting surface 40a (i.e. the surface facing the front of the device), and a pair of left and right shafts 140c are formed on the pair of left and right vertical flanges 140b, protruding outward in the left-right direction along the axis Ax.
  • the pair of left and right shafts 140c are placed on mounting portions 52c formed on the inner surface of the peripheral wall portion 52a of the first housing 52.
  • Each mounting portion 52c has a roughly U-shaped mounting surface.
  • the second housing 54 is formed with abutment portions (not shown) for positioning the reflector 40 by abutting from above against the shaft portion 140c placed on the pair of left and right mounting portions 52c.
  • the actuator 90 is configured to transmit a driving force to the reflector 40 via a driving force transmission member 92.
  • the actuator 90 and the driving force transmission member 92 are disposed inwardly from both side edges of the reflector 40 in the left-right direction (specifically, in the center position of the reflector 40 in the left-right direction).
  • the driving force transmission member 92 is disposed below the reflector 40 and is connected to the reflector 40 in a manner that allows it to rotate around the axis Ax.
  • the reflector 40 has a pivot portion 140d formed in the left-right center of the lower region on the back surface of its reflective surface 40a (i.e., the surface facing the front of the device).
  • This pivot portion 140d is formed to extend diagonally downward toward the front of the device, and its tip portion 140d1 is formed in a spherical shape.
  • This pivot portion 140d is adapted to engage with the front end portion of the drive force transmission member 92 at its tip portion 140d1.
  • the actuator 90 comprises an actuator body 90A fixed to the bottom wall portion 52b of the first housing 52, and an output shaft member 90B configured to be able to reciprocate in the front-to-rear direction of the device while protruding downward from the actuator body 90A.
  • the output shaft member 90B is formed to extend downward, and its tip portion 90Ba is formed in a spherical shape.
  • the output shaft member 90B is adapted to engage with the rear end portion of the drive force transmission member 92 at its tip portion 90Ba.
  • the actuator body 90A is fixed by tightening the screws 94 from above while a pair of tab-shaped mounting parts 90Aa formed on both the left and right sides of the actuator body are abutted against a pair of boss parts 52d formed on the bottom wall part 52b of the first housing 52.
  • the driving force transmission member 92 is formed with an H-shaped cross section extending in the front-rear direction of the device. This driving force transmission member 92 is configured so that it can move in the front-rear direction of the device while placed on the lower wall portion 52b of the first housing 52.
  • a groove-shaped guide portion 52e is formed in the lower wall portion 52b of the first housing 52 so as to extend in the front-rear direction of the device and to position the driving force transmission member 92 in the left-right direction.
  • the rear end of the driving force transmission member 92 is formed with a tubular portion 92a having a cylindrical inner surface extending in the vertical direction, and the tip portion 90Ba of the output shaft member 90B is inserted into this tubular portion 92a to engage with the output shaft member 90B.
  • the output shaft member 90B reciprocates in the front-to-rear direction of the device, causing the driving force transmission member 92 to reciprocate in the front-to-rear direction of the device.
  • the front end of the driving force transmission member 92 is also formed with a tubular portion 92b having a cylindrical inner surface extending in the vertical direction, and the tip portion 140d1 of the pivot portion 140d of the reflector 40 is inserted into this tubular portion 92b to engage with the pivot portion 140d.
  • the tip portion 140d1 of the pivot portion 140d that engages with the tubular portion 92b also moves in the front-to-rear direction of the device, thereby rotating the reflector 40 around the axis Ax.
  • FIG. 17 the state when the reflector 40 rotates forward around the axis Ax is shown by a two-dot chain line, and the state when the reflector 40 rotates rearward around the axis Ax is shown by a dashed line.
  • a slit 92b1 is formed in the rear wall of the cylindrical portion 92b so as to extend in the vertical direction in order to avoid interference with the pivot portion 140d.
  • the driving force transmission member 92 is formed so that the area near its front end extends diagonally upward toward the front of the device, allowing the cylindrical portion 92b to engage with the pivot portion 140d of the reflector 40 in the appropriate position.
  • the image projection device 410 includes an image generation unit 20 that generates a display image PIC, a reflector 40 that reflects light emitted from the image generation unit 20 toward a display area 102A (image display section) of the front window 102, and a unit support member 70 that supports the image generation unit 20.
  • the reflector 40 is supported rotatably about an axis Ax that extends in the left-right direction relative to the housing 50.
  • An actuator 90 for rotating the reflector 40 about the axis Ax is supported on the housing 50. This makes it possible to project the display image PIC at an appropriate position relative to the display area 102A by driving the actuator 90.
  • the driving force of the actuator 90 is transmitted to the reflector 40 via the driving force transmission member 92.
  • the actuator 90 and the driving force transmission member 92 are disposed inwardly from both side edges of the reflector 40 in the left-right direction. This makes it possible to maximize the left-right width of the reflector 40 in the internal space 12 of the housing 50. This also makes it possible to maximize the left-right width of the display image PIC projected in the display area 102A.
  • the image projection device 410 which is configured to project the display image PIC on the image display section using light emitted from the image generation unit 20, can project the display image PIC with a wide left-right width.
  • the actuator 90 is configured to reciprocate the driving force transmission member 92 in the front-to-rear direction of the device, and the driving force transmission member 92 is connected to the reflector 40 in a manner that allows it to rotate about the axis Ax while being positioned below the reflector 40. This makes it easy to arrange the actuator 90 and the driving force transmission member 92 in a layout that does not impede the light emitted from the image generating unit 20 from entering the reflector 40.
  • the actuator 90 comprises an actuator body 90A fixed to the housing 50, and an output shaft member 90B configured to protrude downward from the actuator body 90A and to be able to move back and forth in the front-to-rear direction of the device, so that it is even easier to arrange the actuator 90 and the drive force transmission member 92 in a layout that does not impede the light emitted from the image generating unit 20 from being incident on the reflector 40.
  • the driving force transmission member 92 is formed with an H-shaped cross section extending in the front-to-rear direction of the device, so that the driving force transmission member 92 can be easily slid along the inner surface of the lower wall portion 50b of the housing 50 while ensuring sufficient rigidity of the driving force transmission member 92, thereby efficiently transmitting the driving force of the actuator 90 to the reflector 40.
  • the reflector 40 is a concave mirror with an outer shape that is long in the left-right direction, and the actuator 90 is positioned so that it is located at the center of the reflector 40 in the left-right direction, so that the actuator 90 can be efficiently positioned in the internal space 12 of the housing 50, thereby minimizing the front-to-rear width of the housing 50.
  • the actuator 90 and the driving force transmission member 82 are described as being positioned at the center of the reflector 40 in the left-right direction, but even if they are positioned off-center, as long as they are positioned inside both side edges of the reflector 40, it is possible to obtain substantially the same effect as in the above embodiment.
  • the reflector 40 has been described as having a pivot portion 140d with a spherical tip portion 140d1, but it is also possible to have a flat plate portion with an arc-shaped tip portion instead of the pivot portion 140d, and it is also possible for the pivot portion 140d to be made of a separate member from the reflector 40.
  • FIG. 18 is a diagram similar to FIG. 15, showing an image projection device 510 according to this modified example.
  • the basic configuration of the image projection device 510 of this modified example is similar to that of the above embodiment, but the configurations of the actuator 190 and the driving force transmission member 192 are different from those of the above embodiment.
  • the driving force of the actuator 190 is transmitted to the reflector 40 via the driving force transmission member 192, causing the reflector 40 to rotate about the axis Ax.
  • the actuator 190 in this modified example includes an actuator body 190A fixed to the housing 50, and a spur gear 190C that protrudes downward from the actuator body 190A and is configured to rotate about the vertical axis.
  • the driving force transmission member 192 of this modified example is formed with an H-shaped cross section extending in the front-rear direction of the device, and is configured so as to be movable in the front-rear direction of the device while placed on the lower wall portion 52b of the first housing 52.
  • the front end of this driving force transmission member 192 is formed with a cylindrical portion 192b similar to the driving force transmission member 92 of the above embodiment.
  • the rear end of the driving force transmission member 192 does not have a cylindrical portion 92a like the driving force transmission member 92 of the above embodiment, but instead has a rack-shaped toothed portion 192c formed on the side surface.
  • the driving force transmission member 192 is arranged with its toothed portion 192c meshing with the spur gear 190C of the actuator 190, so that the driving force of the actuator 190 is transmitted to the reflecting mirror 40 via the driving force transmission member 192.
  • the actuator 190 and the driving force transmission member 192 are also positioned inside both side edges of the reflector 40 in the left-right direction.
  • the driving force transmission member 192 is also positioned in the left-right direction by a guide portion 52e formed on the bottom wall portion 52b of the first housing 52.
  • the actuator 190 and the driving force transmission member 192 are positioned inside both side edges of the reflector 40 in the left-right direction, so that substantially the same effect can be obtained as in the above embodiment.
  • the reflecting surface 40a of the reflecting mirror 40 is described as having a horizontally elongated rectangular outer shape, but it is also possible for the reflecting surface 40a to have an outer shape other than this.
  • the surface shape of the reflecting surface 40a of the reflecting mirror 40 is described as being a concave curved surface, but it is also possible for the reflecting mirror 40 to have a surface shape other than this.
  • the image projection device 410 has been described as having a single reflector 40, but it is also possible to have multiple reflectors that sequentially reflect the light emitted from the image generation unit 20 toward the display area 102A of the front window 102, and even when such a configuration is adopted, it is possible to obtain the same effects as in the above embodiments.
  • it is particularly effective to place a polarizing plate 80 between the image generation unit 20 and the reflector closest to it.
  • the image display unit is described as being configured from the display area 102A of the windshield 102, but it is also possible to configure the image display unit from a translucent plate or the like arranged on the inside of the passenger compartment of the windshield 102.
  • the image projection device 410 has been described as an in-vehicle head-up display, but it may also be used for other purposes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

L'invention concerne une plaque de polarisation (80) qui est disposée entre une unité de génération d'image (20) et un miroir réfléchissant (40) qui réfléchit la lumière émise par l'unité de génération d'image vers une région d'affichage (102A) d'un pare-brise (102). Une ouverture (70a) pour transmettre la lumière émise est formée dans un élément de support d'unité (70) qui supporte l'unité de génération d'image (20). De plus, la plaque de polarisation (80) est supportée par l'élément de support d'unité (70) sur la périphérie de l'ouverture (70a). Grâce à cette configuration, la quantité de lumière solaire S réfléchie par le miroir réfléchissant (40) qui atteint l'unité de génération d'image (20) est réduite, et la perte de fonction de l'unité de génération d'image (20) est efficacement supprimée. Cet effet est également obtenu tandis que la taille de la plaque de polarisation (80) est maintenue à un minimum.
PCT/JP2023/038874 2022-11-09 2023-10-27 Dispositif d'irradiation d'image WO2024101184A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2022-179366 2022-11-09
JP2022179366A JP2024068780A (ja) 2022-11-09 2022-11-09 画像照射装置
JP2022180853A JP2024070393A (ja) 2022-11-11 2022-11-11 画像照射装置
JP2022-180853 2022-11-11

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WO2024101184A1 true WO2024101184A1 (fr) 2024-05-16

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Citations (12)

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Publication number Priority date Publication date Assignee Title
JP2007065011A (ja) * 2005-08-29 2007-03-15 Nippon Seiki Co Ltd ヘッドアップディスプレイ装置
JP2008130412A (ja) * 2006-11-22 2008-06-05 Epson Imaging Devices Corp バックライトユニット及びこれを有する液晶表示装置
JP2013174855A (ja) * 2012-01-24 2013-09-05 Nippon Seiki Co Ltd ヘッドアップディスプレイ装置
JP2016218163A (ja) * 2015-05-18 2016-12-22 日本精機株式会社 ミラーユニットおよび表示装置
US20170045738A1 (en) * 2015-07-17 2017-02-16 Lg Electronics Inc. Head up display for vehicle
JP2019077393A (ja) * 2017-10-26 2019-05-23 矢崎総業株式会社 車両用表示装置
JP2020019287A (ja) * 2018-07-30 2020-02-06 日本精機株式会社 ヘッドアップディスプレイ装置
JP2020042929A (ja) * 2018-09-07 2020-03-19 株式会社小糸製作所 空間光変調ユニット
CN212125017U (zh) * 2020-03-18 2020-12-11 浙江零跑科技有限公司 一种ar-hud装置
JP2021076745A (ja) * 2019-11-11 2021-05-20 株式会社デンソー 虚像表示装置及び偏光調整部材
WO2021193074A1 (fr) * 2020-03-26 2021-09-30 株式会社小糸製作所 Dispositif de génération d'images, miroir réfléchissant et dispositif d'affichage tête haute
JP2021162774A (ja) * 2020-04-01 2021-10-11 株式会社デンソー 虚像表示装置

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007065011A (ja) * 2005-08-29 2007-03-15 Nippon Seiki Co Ltd ヘッドアップディスプレイ装置
JP2008130412A (ja) * 2006-11-22 2008-06-05 Epson Imaging Devices Corp バックライトユニット及びこれを有する液晶表示装置
JP2013174855A (ja) * 2012-01-24 2013-09-05 Nippon Seiki Co Ltd ヘッドアップディスプレイ装置
JP2016218163A (ja) * 2015-05-18 2016-12-22 日本精機株式会社 ミラーユニットおよび表示装置
US20170045738A1 (en) * 2015-07-17 2017-02-16 Lg Electronics Inc. Head up display for vehicle
JP2019077393A (ja) * 2017-10-26 2019-05-23 矢崎総業株式会社 車両用表示装置
JP2020019287A (ja) * 2018-07-30 2020-02-06 日本精機株式会社 ヘッドアップディスプレイ装置
JP2020042929A (ja) * 2018-09-07 2020-03-19 株式会社小糸製作所 空間光変調ユニット
JP2021076745A (ja) * 2019-11-11 2021-05-20 株式会社デンソー 虚像表示装置及び偏光調整部材
CN212125017U (zh) * 2020-03-18 2020-12-11 浙江零跑科技有限公司 一种ar-hud装置
WO2021193074A1 (fr) * 2020-03-26 2021-09-30 株式会社小糸製作所 Dispositif de génération d'images, miroir réfléchissant et dispositif d'affichage tête haute
JP2021162774A (ja) * 2020-04-01 2021-10-11 株式会社デンソー 虚像表示装置

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