WO2021106335A1 - Dispositif optique pour affichage d'image virtuelle, système d'affichage d'image virtuelle et corps mobile - Google Patents

Dispositif optique pour affichage d'image virtuelle, système d'affichage d'image virtuelle et corps mobile Download PDF

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Publication number
WO2021106335A1
WO2021106335A1 PCT/JP2020/035620 JP2020035620W WO2021106335A1 WO 2021106335 A1 WO2021106335 A1 WO 2021106335A1 JP 2020035620 W JP2020035620 W JP 2020035620W WO 2021106335 A1 WO2021106335 A1 WO 2021106335A1
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Prior art keywords
virtual image
image display
curvature
radius
optical device
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PCT/JP2020/035620
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English (en)
Japanese (ja)
Inventor
智明 宮本
崇人 羽田
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パナソニックＩｐマネジメント株式会社
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Publication of WO2021106335A1 publication Critical patent/WO2021106335A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays

Definitions

  • the present disclosure relates to an optical device for displaying a virtual image, a virtual image display system, and a moving body. More specifically, the present disclosure relates to a virtual image display optical device for displaying a virtual image, a virtual image display system including the virtual image display optical device, and a moving body including the virtual image display system.
  • Patent Document 1 discloses a head-up display device having high visibility of a virtual image.
  • a virtual image display system that displays a virtual image such as the head-up display device described in Patent Document 1, is required to be miniaturized, but there is a problem that the distortion of the virtual image increases with the miniaturization. Further, there is a problem that the light rays passing around the visible visible area of the person observing the virtual image (observer) are blocked by the elements constituting the virtual image display system, and the visible area becomes small.
  • the present disclosure provides a virtual image display optical device, a virtual image display system, and a moving body that can reduce distortion of a virtual image while reducing the size and secure a sufficient visible area that can be visually recognized by an observer.
  • the virtual image display optical device includes a projected member that is displayed by the image display device and on which a displayed image reflected by the reflecting surface of the reflecting member is projected, and is separated from the projected member.
  • a virtual image of the displayed image is displayed at the position.
  • the projected member has a facing surface facing the reflecting surface. The vicinity of the center of the facing surface is formed in a curved surface shape that protrudes in a direction away from the reflecting surface. The vicinity of the center of the reflecting surface is formed in a curved surface shape that protrudes toward the image display device.
  • the minimum value of the first radius of curvature which is the radius of curvature in the left-right direction as seen by the observer observing the virtual image
  • R1 the minimum value of the first radius of curvature
  • R2 the minimum value of the second radius of curvature
  • the virtual image display optical device includes a projected member that is displayed by the image display device and on which a displayed image reflected by the reflecting surface of the reflecting member is projected, and is separated from the projected member.
  • a virtual image of the displayed image is displayed at the position.
  • the projected member has a facing surface facing the reflecting surface. The vicinity of the center of the facing surface is formed in a curved surface shape that protrudes in a direction away from the reflecting surface. The vicinity of the center of the reflecting surface is formed in a curved surface shape that protrudes toward the image display device.
  • the minimum value of the third radius of curvature which is the radius of curvature in the vertical direction as seen by the observer observing the virtual image, is defined as R3.
  • the minimum value of the fourth radius of curvature which is the radius of curvature in the vertical direction, is R4. At this time, the condition of 1.63 ⁇ R4 / R3 ⁇ 6.00 is satisfied.
  • the virtual image display optical device includes a projected member that is displayed by the image display device and on which a displayed image reflected by the reflecting surface of the reflecting member is projected, and is separated from the projected member.
  • a virtual image of the displayed image is displayed at the position.
  • the projected member has a facing surface facing the reflecting surface.
  • the vicinity of the center of the facing surface is formed in a curved surface shape that protrudes in a direction away from the reflecting surface.
  • the vicinity of the center of the reflecting surface is formed in a curved surface shape that protrudes toward the image display device.
  • the width of the visible area in the left-right direction as seen by the observer is defined as EB1.
  • the radius of curvature of the facing surfaces in the left-right direction as seen by the observer is R5. At this time, the condition of 0.1 ⁇ EB1 / R5 ⁇ 0.7 is satisfied.
  • the virtual image display optical device includes a projected member that is displayed by the image display device and on which a displayed image reflected by the reflecting surface of the reflecting member is projected, and is separated from the projected member.
  • a virtual image of the displayed image is displayed at the position.
  • the projected member has a facing surface facing the reflecting surface. At least near the center of the facing surface is formed in a curved surface shape that protrudes in a direction away from the reflecting surface. At least near the center of the reflective surface is formed in a curved surface shape that protrudes toward the image display device.
  • the width of the visible area in the vertical direction as seen by the observer is defined as EB2.
  • the radius of curvature of the facing surfaces in the vertical direction as seen by the observer is R6. At this time, the condition of 0.05 ⁇ EB2 / R6 ⁇ 0.25 is satisfied.
  • the virtual image display system includes the image display device and the virtual image display optical device.
  • the moving body according to one aspect of the present disclosure has a virtual image display system.
  • FIG. 1 is a schematic configuration diagram of a virtual image display optical device, a virtual image display system, and a moving body according to the embodiment of the present disclosure.
  • FIG. 2 is a schematic view of the above-mentioned virtual image display system.
  • FIG. 3 is a schematic configuration diagram of an image display device in the above-mentioned virtual image display system.
  • FIG. 4 is a schematic view showing a cross section of the projected member in the left-right direction in the above-mentioned optical device for displaying a virtual image.
  • FIG. 5 is a schematic view showing a vertical cross section of the projected member in the above-mentioned optical device for displaying a virtual image.
  • FIG. 1 is a schematic configuration diagram of a virtual image display optical device, a virtual image display system, and a moving body according to the embodiment of the present disclosure.
  • FIG. 2 is a schematic view of the above-mentioned virtual image display system.
  • FIG. 3 is a schematic configuration diagram of an image display device in the
  • FIG. 6 is a schematic view showing a cross section of the reflecting member in the left-right direction in the above-mentioned optical device for displaying a virtual image.
  • FIG. 7 is a schematic view showing a vertical cross section of the reflecting member in the above-mentioned optical device for displaying a virtual image.
  • FIG. 8 is an explanatory diagram for explaining the relationship between the numerical embodiment of the above-mentioned virtual image display optical device and the condition 1.
  • FIG. 9 is an explanatory diagram for explaining the relationship between the numerical embodiment of the virtual image display optical device and the condition 2.
  • FIG. 10 is an explanatory diagram for explaining the relationship between the numerical embodiment of the above-mentioned virtual image display optical device and the condition 3.
  • FIG. 11 is an explanatory diagram for explaining the relationship between the numerical embodiment of the above-mentioned virtual image display optical device and the condition 4.
  • the virtual image display optical device 2, the virtual image display system 1, and the moving body 4 according to the embodiment of the present disclosure will be described in detail with reference to the drawings.
  • each figure described in the following embodiment is a schematic view, and the respective ratio of the size and the thickness of each component does not necessarily reflect the actual dimensional ratio.
  • the configuration described in the following embodiments is only an example of the present disclosure.
  • the present disclosure is not limited to the following embodiments, and various changes can be made depending on the design and the like as long as the effects of the present disclosure can be achieved.
  • the virtual image display system 1 (hereinafter, abbreviated as virtual image display system 1) according to the embodiment is a head-up display device mounted on the automobile 4 (see FIGS. 1 and 2).
  • the automobile 4 corresponding to the moving body according to the embodiment includes vehicles such as passenger cars, trucks, buses, motorcycles (motorcycles), and trains.
  • the moving body according to the embodiment may be a vehicle on which a person rides and is driven, for example, a ship navigating on water, an airplane, or the like.
  • the head-up display device (virtual image display system 1) is installed on the dashboard 40 of the automobile 4 (see FIG. 1).
  • the virtual image display system 1 projects a display image on a projected member 20 arranged on the dashboard 40.
  • the virtual image display system may be a so-called far-view electronic rear-view mirror that projects an image of the rear of the vehicle captured by the TV camera onto a projected member arranged at the position of the rear-view mirror in the vehicle.
  • the projected member 20 is formed in a plate shape by at least a material capable of transmitting visible light, for example, a synthetic resin material such as glass or an acrylic resin or a polycarbonate resin.
  • a projected member 20 may be called a combiner.
  • the virtual image display system 1 By projecting the display image onto the projected member 20, the virtual image display system 1 displays the display image at a position in front of the windshield 41 of the automobile 4 (in front of the outside of the automobile 4) as seen from the driver 6 who is the observer. It forms a virtual image 5 of the image (see FIGS. 1 and 2). Therefore, the driver 6 can visually recognize the virtual image 5 of the display image displayed by the virtual image display system 1 through the projected member 20.
  • the alternate long and short dash line in FIG. 1 indicates the central optical path LC, which is an optical path passing through the center of the virtual image 5 and the center of the visual recognition region 60.
  • the central optical path LC of the virtual image 5 is shown by a two-dot dashed line unless otherwise specified.
  • the virtual image display system 1 includes an image display device 3 for displaying a display image on a display surface 30, and a virtual image display optical device 2 (hereinafter, virtual image display optical device 2) according to an embodiment. It is abbreviated as).
  • FIG. 1 shows a part of the structure of the automobile 4 equipped with the virtual image display system 1.
  • FIG. 2 is a schematic view of the virtual image display system 1.
  • the image display device 3 is, for example, a liquid crystal display.
  • the liquid crystal display has a transmissive liquid crystal panel 31 having a display surface 30 for displaying an image, a backlight (not shown) that irradiates the liquid crystal panel 31 with light from the back surface (the surface opposite to the display surface 30) (not shown). (See FIG. 3).
  • the image display device 3 displays, for example, an image showing the speed, navigation information, etc. of the moving automobile 4 controlled by an ECU (Electronic Control Unit) mounted on the automobile 4 on the display surface 30 of the liquid crystal panel 31. It is configured to do.
  • ECU Electronic Control Unit
  • the image displayed on the display surface 30 may be referred to as a display image of the image display device 3.
  • the display surface 30 of the liquid crystal panel 31 may be referred to as the display surface 30 of the image display device 3.
  • the image display device 3 is not limited to the liquid crystal display.
  • the image display device 3 may be an organic EL panel using an organic electroluminescence element.
  • the image display device 3 may be a so-called laser projector that displays an image by scanning the laser beam of the semiconductor laser on the screen.
  • the virtual image display optical device 2 includes a projected member 20.
  • the virtual image display optical device 2 preferably further includes a reflective member 21.
  • the projected member 20 is also called a combiner.
  • the projected member 20 transmits the light from the front view and reflects the light of the display image (light radiated from the display surface 30 of the image display device 3) to superimpose the front view of the automobile 4 and the virtual image 5. It is configured to let you.
  • the projected member 20 is preferably composed of a half mirror having a reflectance of about 50% (transmittance of 50%) in the visible light region.
  • the projected member 20 is a curved plate made of a translucent synthetic resin material such as an acrylic resin or a polycarbonate resin and has a concave surface on the driver 6 side (the facing surface 200 facing the reflecting member 21). It is formed in a shape (see FIGS. 1 and 2).
  • the facing surface 200 of the projected member 20 may be formed in a curved surface (concave surface) shape in which at least the vicinity of the center of the facing surface 200 projects in a direction away from the reflecting member 21.
  • the vicinity of the center of the facing surface 200 is preferably a region including the center and having an area ratio of about 10% when the center of gravity of the facing surface 200 is centered.
  • FIG. 4 shows a cross section of the projected member 20 in the horizontal direction (horizontal direction seen from the driver 6), and is left and right as seen from the driver 6 in the radius of curvature of the facing surface 200 of the projected member 20. It is explanatory drawing for demonstrating the radius of curvature (second radius of curvature Rcx) of a direction.
  • FIG. 4 also illustrates the local coordinate system (xc, yc, zc coordinates) of the projected member 20.
  • FIG. 5 shows a cross section of the projected member 20 in the vertical direction (vertical direction seen from the driver 6), and the curvature in the vertical direction seen from the driver 6 within the radius of curvature of the facing surface 200 of the projected member 20. It is explanatory drawing for demonstrating the radius (fourth radius of curvature Rcy). In addition, FIG. 5 also illustrates the local coordinate system (xc, yc, zc coordinates) of the projected member 20.
  • the reflecting member 21 has a reflecting surface 210 having a reflectance of 80% or more in vertical incident in the visible light region.
  • the reflecting member 21 may be a cold mirror that transmits heat rays such as near infrared rays in order to reduce the heat of sunlight reaching the image display device 3.
  • the reflective member 21 is arranged so that the reflective surface 210 faces the display surface 30 of the image display device 3 (see FIGS. 1 and 2).
  • the reflecting surface 210 is formed in a curved surface shape that protrudes toward the display surface 30 of the image display device 3.
  • the reflective surface 210 of the reflective member 21 may be formed in a curved surface (convex surface) shape in which at least the vicinity of the center of the reflective surface 210 projects toward the display surface 30.
  • the vicinity of the center of the reflecting surface 210 is preferably a region including the center and having an area ratio of about 10% when the center of gravity of the reflecting surface 210 is centered.
  • FIG. 6 shows a cross section of the reflecting member 21 in the horizontal direction (horizontal direction seen from the driver 6), and is the lateral direction seen from the driver 6 within the radius of curvature of the reflecting surface 210 of the reflecting member 21. It is explanatory drawing for demonstrating the radius of curvature (first radius of curvature Rmx). Further, FIG. 6 also illustrates the local coordinate system (xm, ym, zm coordinates) of the reflective member 21.
  • FIG. 7 shows a cross section of the reflective member 21 in the vertical direction (vertical direction seen from the driver 6), and among the radius of curvature of the reflective surface 210 of the reflective member 21, the radius of curvature in the vertical direction seen from the driver 6 ( It is explanatory drawing for demonstrating 3rd radius of curvature Rmy). Further, FIG. 7 also illustrates the local coordinate system (xm, ym, zm coordinates) of the reflective member 21.
  • the first radius of curvature which is the radius of curvature in the left-right direction as seen by the observer (driver 6) who observes the virtual image 5, among the radii of curvature of the reflecting surface 210 of the reflecting member 21.
  • R1 be the minimum value of Rmx.
  • the minimum value of the second radius of curvature Rcx which is the radius of curvature in the left-right direction, among the radii of curvature of the facing surface 200 of the projected member 20 is R2.
  • the virtual image display optical device 2 is configured so that the ratio of the minimum value R2 of the second radius of curvature Rcx to the minimum value R1 of the first radius of curvature Rmx satisfies the following condition (1).
  • the third radius of curvature Rmy which is the radius of curvature in the vertical direction seen from the observer (driver 6) who observes the virtual image 5, among the radius of curvature of the reflecting surface 210 of the reflecting member 21.
  • R3 be the minimum value of.
  • the minimum value of the fourth radius of curvature Rcy which is the radius of curvature in the vertical direction, is R4.
  • the virtual image display optical device 2 is configured so that the ratio of the minimum value R4 of the fourth radius of curvature Rcy to the minimum value R3 of the third radius of curvature Rmy satisfies the following condition (2).
  • the power (refractive power) of the projected member 20 and the reflecting member 21 are factors in which the ratio R2 / R1 is below the lower limit of the condition (1) or the ratio R4 / R3 is below the lower limit of the condition (2). Each decrease in power is expected.
  • the length of the optical path (optical path length) from the image display device 3 to the projected member 20 via the reflecting member 21 must be increased. As a result, the size of the virtual image display optical device 2 is increased.
  • the power of the projected member 20 becomes too large with respect to the power of the reflecting member 21. If the power of the projected member 20 becomes too large with respect to the power of the reflecting member 21, the following two problems are likely to occur.
  • the first problem is that the external light (sunlight) collected by the projected member 20 through the windshield 41 becomes strong, and the external light hits the display surface 30 of the image display device 3 to cause the image display device 3 to have a problem. The deterioration of the liquid crystal panel 31 is likely to progress.
  • the second problem is that the distance between the projected member 20 and the reflecting member 21 becomes too narrow, so that the light rays from the facing surface 200 of the projected member 20 toward the observer (driver 6) interfere with the reflecting member 21. This means that the visible area 60 tends to be narrowed.
  • the power of the reflecting member 21 becomes too small with respect to the power of the projected member 20. If the power of the reflecting member 21 becomes too small with respect to the power of the projected member 20, the following problems are likely to occur.
  • the problem is that the curvature of field and distortion generated by the positive power of the projected member 20 are not canceled by the negative power of the reflecting member 21, and the curvature of field and distortion tend to worsen.
  • the negative power of the reflective member 21 becomes large as a factor when the ratio R2 / R1 exceeds the upper limit value of the condition (1) or when the ratio R4 / R3 exceeds the upper limit value of the condition (2). Be done.
  • the distance from the observer (driver 6) to the virtual image 5 (also called the viewing distance) is extended, and when the upper limit is exceeded, the viewing distance is near infinity or exceeds infinity, so-called over infinity. It will be in the state. Since a healthy person with sound eyesight cannot clearly see a virtual image having a viewing distance of infinity or over infinity, the visibility of the virtual image deteriorates.
  • the optical path length becomes long, which leads to an increase in the size of the virtual image display optical device 2. Further, when the amount of change in the distance from the observer (driver 6) to the virtual image 5 in the viewing area 60 increases and the observer (driver 6) changes the viewpoint in the viewing area 60. It takes more time to adjust the focus of the eyes.
  • the virtual image display optical device 2 satisfies the condition (1) or the condition (2), preferably the condition (1) and the condition (2) to reduce the size of the virtual image while reducing the distortion (distortion) and the image. It is possible to suppress the occurrence of deterioration of visibility due to curvature of field and viewing distance near infinity.
  • the observer (driver 6) observing the virtual image 5 observes the virtual image 5 within the size of the visible area 60 (also referred to as Eye Box) in which the virtual image 5 can be visually recognized.
  • the width of the visible area 60 in the left-right direction as seen by a person is defined as EB1 (see FIG. 2).
  • the radius of curvature of the facing surfaces 200 in the left-right direction as seen from the observer is defined as R5.
  • the virtual image display optical device 2 is configured so that the ratio of the width EB1 in the left-right direction of the viewing area 60 to the radius of curvature R5 in the left-right direction of the facing surface 200 satisfies the following condition (3).
  • the width be EB2 (see FIG. 2).
  • the radius of curvature of the facing surfaces 200 in the vertical direction as seen from the observer is defined as R6.
  • the virtual image display optical device 2 is configured so that the ratio of the vertical width EB2 of the visible region 60 to the vertical radius of curvature R6 of the facing surface 200 satisfies the following condition (4).
  • the ratio EB1 / R5 exceeds the upper limit value of the condition (3) or the ratio EB2 / R6 exceeds the upper limit value of the condition (4), the power of the facing surface 200 of the projected member 20 becomes large, so that the reflection occurs. It is necessary to reduce the distance from the surface 210. As a result, if the distance between the projected member 20 and the reflecting member 21 becomes too narrow, the light rays from the facing surface 200 of the projected member 20 toward the observer (driver 6) tend to interfere with the reflecting member 21. Further, the light rays from the reflecting member 21 toward the projected member 20 easily interfere with the liquid crystal panel 31 (see FIG. 1). Further, since the external light (sunlight) collected by the projected member 20 becomes stronger, the external light hits the display surface 30 of the image display device 3, and the deterioration of the liquid crystal panel 31 of the image display device 3 progresses. It will be easier.
  • the virtual image display optical device 2 satisfies the condition (3) or the condition (4), preferably the condition (3) and the condition (4), thereby reducing the size of the virtual image (curvature field and distortion). Aberration) can be suppressed.
  • the virtual image display optical device 2 is preferably configured to satisfy the following condition (5).
  • LD represents the length of the first optical path LC1 from the display surface 30 of the image display device 3 to the reflection surface 210 of the reflection member 21 (see FIG. 2).
  • LM represents the length of the second optical path LC2 from the reflecting surface 210 of the reflecting member 21 to the facing surface 200 of the projected member 20 (see FIG. 2).
  • the ratio LM / LD of the length LM of the second optical path LC2 to the length LD of the first optical path LC1 is less than the lower limit of the condition (5), the distance between the projected member 20 and the reflecting member 21 becomes too narrow. The light rays from the facing surface 200 of the projected member 20 toward the observer (driver 6) easily interfere with the reflecting member 21.
  • Another factor below the lower limit of condition (5) is that the distance between the image display device 3 and the reflecting member 21 (length LD of the first optical path LC1) becomes longer, and if it falls below the lower limit, This leads to an increase in the size of the virtual image display optical device 2.
  • the ratio LM / LD of the length LM of the second optical path LC2 to the length LD of the first optical path LC1 exceeds the upper limit of the condition (5), the distance between the image display device 3 and the reflecting member 21 becomes too narrow.
  • the light rays from the reflecting member 21 toward the projected member 20 and the image display device 3 (liquid crystal panel 31) are likely to physically interfere with each other.
  • Another factor that exceeds the upper limit of the condition (5) is that the distance between the reflecting member 21 and the projected member 20 (the length LM of the second optical path LC2) becomes long, and the virtual image display optical device 2 Will lead to an increase in size.
  • the virtual image display optical device 2 By configuring the virtual image display optical device 2 so as to satisfy the condition (5), the virtual image display optical device 2 is compact while suppressing interference between the light rays for displaying the virtual image 5 and the liquid crystal panel 31. Can be achieved.
  • the distance VID (see FIG. 1) from the center of the visible area 60 to the center of the virtual image 5 is preferably 2500 mm or less.
  • the virtual image display optical device 2 further shortens the focus adjustment time from the state in which the observer focuses on the distant view to the focus on the virtual image 5. It is possible to reduce the size.
  • the unit of length in the table is millimeter (mm), and the unit of angle is degree (°).
  • the free curved surface forming the facing surface 200 of the projected member 20 and the reflecting surface 210 of the reflecting member 21 is defined by the following mathematical formulas (A1) and (A2).
  • z is the sag amount at the position of the coordinates (x, y) from the axis that defines the free curved surface.
  • r is the distance from the origin of the axis that defines the free-form surface to the coordinates (x, y).
  • c is the curvature at the origin of the axis that defines the free surface.
  • k is a conic constant.
  • m and n are integers satisfying the mathematical formula (A1).
  • Cj is a coefficient of the xy polynomial.
  • the reference coordinate origin is the center of the display image displayed on the display surface 30, and as shown in FIG. 3, the X-axis, the Y-axis, and the Z-axis are defined.
  • ADE means the amount of rotation from the Z-axis direction to the Y-axis direction about the X-axis.
  • BDE means the amount of rotation from the X-axis direction to the Z-axis direction about the Y-axis.
  • CDE means the amount of rotation from the X-axis direction to the Y-axis direction about the Z-axis.
  • Numerical Example 1 is an example of the virtual image display optical device 2.
  • Table 1 shows the configuration data of the virtual image display optical device 2 of the numerical embodiment 1
  • Table 2 shows the coefficients of the polynomial free-form surface of the virtual image display optical device 2 of the numerical embodiment 1.
  • Numerical Example 2 is an example of the virtual image display optical device 2.
  • Table 3 shows the configuration data of the virtual image display optical device 2 of the numerical embodiment 2
  • Table 4 shows the coefficients of the polynomial free-form surface of the virtual image display optical device 2 of the numerical embodiment 2.
  • Numerical Example 3 is an example of the virtual image display optical device 2.
  • Table 5 shows the configuration data of the virtual image display optical device 2 of the numerical embodiment 3
  • Table 6 shows the coefficients of the polynomial free-form surface of the virtual image display optical device 2 of the numerical example 3.
  • Numerical Example 4 is an example of the virtual image display optical device 2.
  • Table 7 shows the configuration data of the virtual image display optical device 2 of the numerical embodiment 4
  • Table 8 shows the coefficients of the polynomial free-form surface of the virtual image display optical device 2 of the numerical embodiment 4.
  • Numerical Example 5 is an example of the virtual image display optical device 2.
  • Table 9 shows the configuration data of the virtual image display optical device 2 of the numerical embodiment 5, and Table 10 shows the coefficients of the polynomial free-form surface of the virtual image display optical device 2 of the numerical example 5.
  • Numerical Example 6 is an example of the virtual image display optical device 2.
  • Table 11 shows the configuration data of the virtual image display optical device 2 of the numerical embodiment 6
  • Table 12 shows the coefficients of the polynomial free-form surface of the virtual image display optical device 2 of the numerical embodiment 6.
  • Numerical Example 7 is an example of the virtual image display optical device 2.
  • Table 13 shows the configuration data of the virtual image display optical device 2 of the numerical embodiment 7, and
  • Table 14 shows the coefficients of the polynomial free-form surface of the virtual image display optical device 2 of the numerical example 7.
  • Table 15 shows an example of the size of the imaginary image 5, the distance VID from the center of the visible area 60 to the center of the imaginary image 5, and the sizes of the visible area 60 in the horizontal direction (X-axis direction) and the vertical direction (Y-axis direction). Shown. Tables 16 and 17 show the values of the ratio R2 / R1, the ratio R4 / R3, the ratio EB1 / R5, the ratio EB2 / R6, and the ratio LD / LM in all the numerical examples 1-7.
  • FIGS. 8 to 11 the relationship between the above-mentioned seven numerical examples 1-7 and the lower limit value and the upper limit value of the condition 1-4 is shown in FIGS. 8 to 11.
  • “numerical examples” are designated as “examples”.
  • condition 1 is satisfied in all of the numerical examples 1-7.
  • the condition 2 is satisfied in the numerical examples 1 and 5-7.
  • it is below the lower limit value of Condition 2.
  • condition 3 is satisfied in all of the numerical examples 1-7.
  • the minimum value and the maximum value of the ratio EB1 / R5 of each numerical value Example 1-7 are shown.
  • the condition 4 is satisfied in all of the numerical examples 1-7.
  • the minimum value and the maximum value of the ratio EB2 / R6 of each numerical value Example 1-7 are shown.
  • the virtual image display optical device 2 among the seven numerical examples 1-7, the numerical examples 1 and 5-7 satisfying all of the conditions 1 to 5 are preferable.
  • a display image displayed by the image display device (3) and reflected by the reflection surface (210) of the reflection member (21) is projected.
  • the projected member (20) to be projected is provided.
  • the virtual image display optical device (2) according to the first aspect displays the virtual image (5) of the displayed image at a position away from the projected member (20).
  • the projected member (20) has a facing surface (200) facing the reflecting surface (210).
  • the vicinity of the center of the facing surface (200) is formed in a curved surface shape that protrudes in a direction away from the reflecting surface (210).
  • the vicinity of the center of the reflecting surface (210) is formed in a curved surface shape that protrudes toward the image display device (3).
  • the minimum value of the second radius of curvature (Rcx), which is the radius of curvature in the left-right direction is R2.
  • the virtual image display optical device (2) reduces the distortion of the virtual image (curvature of field and distortion) while reducing the size, and sufficiently widens the visible area (60) visible to the observer. Can be secured.
  • a display image displayed by the image display device (3) and reflected by the reflection surface (210) of the reflection member (21) is projected.
  • the projected member (20) to be projected is provided.
  • the virtual image display optical device (2) according to the second aspect displays the virtual image (5) of the displayed image at a position away from the projected member (20).
  • the projected member (20) has a facing surface (200) facing the reflecting surface (210).
  • the vicinity of the center of the facing surface (200) is formed in a curved surface shape that protrudes in a direction away from the reflecting surface (210).
  • the vicinity of the center of the reflecting surface (210) is formed in a curved surface shape that protrudes toward the image display device (3).
  • the minimum value of the fourth radius of curvature (Rcy), which is the radius of curvature in the vertical direction is R4.
  • the virtual image display optical device (2) reduces the distortion of the virtual image (curvature of field and distortion) while reducing the size, and sufficiently widens the visible area (60) visible to the observer. Can be secured.
  • a display image displayed by the image display device (3) and reflected by the reflection surface (210) of the reflection member (21) is projected.
  • the projected member (20) to be projected is provided.
  • the virtual image display optical device (2) according to the third aspect displays the virtual image (5) of the displayed image at a position away from the projected member (20).
  • the projected member (20) has a facing surface (200) facing the reflecting surface (210).
  • the vicinity of the center of the facing surface (200) is formed in a curved surface shape that protrudes in a direction away from the reflecting surface (210).
  • the vicinity of the center of the reflecting surface (210) is formed in a curved surface shape that protrudes toward the image display device (3).
  • EB1 the radius of curvature of the facing surfaces (200) in the left-right direction as seen from the observer is R5.
  • R5 the radius of curvature of the facing surfaces (200) in the left-right direction as seen from the observer.
  • the virtual image display optical device (2) reduces the distortion of the virtual image (curvature of field and distortion) while reducing the size, and sufficiently widens the visible area (60) visible to the observer. Can be secured.
  • a display image displayed by the image display device (3) and reflected by the reflection surface (210) of the reflection member (21) is projected.
  • the projected member (20) to be projected is provided.
  • the virtual image display optical device (2) according to the fourth aspect displays the virtual image (5) of the displayed image at a position away from the projected member (20).
  • the projected member (20) has a facing surface (200) facing the reflecting surface (210). At least near the center of the facing surface (200) is formed in a curved surface shape that projects in a direction away from the reflecting surface (210). At least near the center of the reflecting surface (210) is formed in a curved surface shape that protrudes toward the image display device (3).
  • EB2 the radius of curvature of the facing surfaces (200) in the vertical direction as seen by the observer.
  • the virtual image display optical device (2) reduces the distortion of the virtual image (curvature of field and distortion) while reducing the size, and sufficiently widens the visible area (60) visible to the observer. Can be secured.
  • the virtual image display optical device (2) according to the fifth aspect of the present disclosure can be realized by combining with any of the first to fourth aspects.
  • the length of the second optical path (LC2) from the reflecting surface (210) to the facing surface (200) is LM, the condition of 1.0 ⁇ LM / LD ⁇ 5.0 is satisfied. Is preferable.
  • the virtual image display optical device (2) according to the fifth aspect can be miniaturized while suppressing interference between the light beam for displaying the virtual image (5) and the image display device (3).
  • the virtual image display optical device (2) according to the sixth aspect of the present disclosure can be realized by combining with any one of the first to fifth aspects.
  • the shortest distance (VID) from the visible area (60) where the observer can see the virtual image (5) to the virtual image (5) is 2500 mm or less. Is preferable.
  • the virtual image display optical device (2) according to the sixth aspect focuses on the virtual image (5) from the state where the observer is focusing on the distant view by setting the distance (VID) to 2500 mm or less. It is possible to further reduce the size while shortening the focus adjustment time.
  • the virtual image display optical device (2) according to the seventh aspect of the present disclosure can be realized by combining with any one of the first to sixth aspects.
  • the virtual image display optical device (2) according to the seventh aspect displays the virtual image (5) when the observer (6) sees the virtual image (5) from the visible area (60) in which the virtual image (5) can be visually recognized.
  • the light rays to be formed it is preferable that the light rays from the projected member (20) toward the viewing region (60) are configured so as not to overlap with the reflecting member (21).
  • the virtual image display optical device (2) according to the seventh aspect can prevent the virtual image (5) from being dispelled by the reflecting member (21) when viewed from the observer.
  • the virtual image display optical device (2) according to the eighth aspect of the present disclosure can be realized by combining with any one of the first to sixth aspects.
  • the virtual image display optical device (2) according to the eighth aspect displays the virtual image (5) when the observer (6) sees the virtual image (5) from the visible area (60) in which the virtual image (5) can be visually recognized.
  • the light rays to be formed it is preferable that the light rays from the image display device (3) toward the reflecting member (21) are configured so as not to overlap with the image display device (3).
  • the virtual image display optical device (2) according to the eighth aspect can prevent the virtual image (5) from being dispelled by the image display device (3) when viewed from the observer.
  • the virtual image display optical device (2) according to the ninth aspect of the present disclosure can be realized by combining with any of the first to eighth aspects.
  • the virtual image display optical device (2) according to the ninth aspect preferably further includes a reflective member (21).
  • the virtual image display optical device (2) according to the ninth aspect can bend light rays by providing the reflective member (21), and can effectively utilize the mounting space.
  • the virtual image display system (1) includes an image display device (3) and an optical device (2) for displaying a virtual image according to any one of the first to ninth aspects.
  • the virtual image display system (1) can suppress the occurrence of distortion of the virtual image (curvature field curvature and distortion) while reducing the size of the virtual image display optical device (2).
  • the moving body (vehicle 4) according to the eleventh aspect of the present disclosure has a virtual image display system (1) according to the tenth aspect.
  • the moving body according to the eleventh aspect can suppress the occurrence of distortion of the virtual image (curvature of field and distortion) while reducing the size of the optical device (2) for displaying the virtual image.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)

Abstract

L'objectif de la présente invention est de réduire la distorsion d'une image virtuelle tout en obtenant une réduction de taille et d'assurer de manière adéquate une région visible qui est visuellement reconnaissable par un observateur. L'invention concerne également un dispositif optique (2) pour l'affichage d'image virtuelle pourvu d'un élément projeté (20) sur lequel une image d'affichage, qui a été affichée par un dispositif d'affichage d'image (3) et a été réfléchie par une surface réfléchissante (210) d'un élément réfléchissant (21), est projetée, et amène une image virtuelle (5) de l'image d'affichage à être affichée dans une position séparée de l'élément projeté (20). L'élément projeté (20) a une surface de face (200) qui fait face à la surface réfléchissante (210). Une zone alentour du centre de la surface de face (200) est formée sous la forme d'une surface incurvée qui fait saillie dans une direction s'éloignant de la surface réfléchissante (210). Une zone alentour du centre de la surface réfléchissante (210) est formée sous la forme d'une surface incurvée qui fait saillie vers le dispositif d'affichage d'image (3). Soit R1 la valeur minimale d'un premier rayon de courbure (Rmx) de la surface réfléchissante (210). Soit R2 la valeur minimale d'un second rayon de courbure (Rcx) de la surface de face (200) de l'élément projeté (20). Dès lors, la condition 1,63<R2/R1≤ 4,50 est satisfaite.
PCT/JP2020/035620 2019-11-26 2020-09-18 Dispositif optique pour affichage d'image virtuelle, système d'affichage d'image virtuelle et corps mobile WO2021106335A1 (fr)

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JP2019213609 2019-11-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017038043A1 (fr) * 2015-08-31 2017-03-09 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage tête haute
JP2017142509A (ja) * 2017-03-09 2017-08-17 株式会社リコー 画像形成装置、画像形成装置を搭載した車両
WO2018116778A1 (fr) * 2016-12-21 2018-06-28 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage d'image virtuelle
WO2019093085A1 (fr) * 2017-11-07 2019-05-16 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage tête haute
WO2019103469A1 (fr) * 2017-11-21 2019-05-31 Corning Precision Materials Co., Ltd. Miroir asphérique pour système d'affichage tête haute et ses procédés de formation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017038043A1 (fr) * 2015-08-31 2017-03-09 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage tête haute
WO2018116778A1 (fr) * 2016-12-21 2018-06-28 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage d'image virtuelle
JP2017142509A (ja) * 2017-03-09 2017-08-17 株式会社リコー 画像形成装置、画像形成装置を搭載した車両
WO2019093085A1 (fr) * 2017-11-07 2019-05-16 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage tête haute
WO2019103469A1 (fr) * 2017-11-21 2019-05-31 Corning Precision Materials Co., Ltd. Miroir asphérique pour système d'affichage tête haute et ses procédés de formation

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