WO2023204198A1 - Head-up display device - Google Patents

Head-up display device Download PDF

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Publication number
WO2023204198A1
WO2023204198A1 PCT/JP2023/015410 JP2023015410W WO2023204198A1 WO 2023204198 A1 WO2023204198 A1 WO 2023204198A1 JP 2023015410 W JP2023015410 W JP 2023015410W WO 2023204198 A1 WO2023204198 A1 WO 2023204198A1
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WO
WIPO (PCT)
Prior art keywords
display
virtual
virtual image
prism
top surface
Prior art date
Application number
PCT/JP2023/015410
Other languages
French (fr)
Japanese (ja)
Inventor
健 川合
Original Assignee
日本精機株式会社
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Filing date
Publication date
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Publication of WO2023204198A1 publication Critical patent/WO2023204198A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms

Definitions

  • the present disclosure relates to a head-up display device.
  • the display device described in Patent Document 1 includes a first display panel and a second display panel, and the display device includes a first display panel and a second display panel such that the angle between the first display panel and the second display panel is approximately 90°.
  • a first display panel and a second display panel are placed close to each other, and a first display light emitted by the first display panel and a second display light emitted by the second display panel are reflected to create two virtual images at different angles. Display.
  • the present disclosure has been made in view of the above-mentioned circumstances, and aims to provide a head-up display device that can be downsized.
  • a head-up display device includes a display device having a display surface that emits display light, and a prism through which the display light emitted from the display surface passes,
  • the prism includes an entrance surface that receives the display light from the display surface, and an exit surface that outputs the display light that has entered the prism from the entrance surface, and the exit surface extends along the display surface.
  • the storage device includes a first top surface extending in the direction, and an inclined surface inclined with respect to the first top surface.
  • FIG. 1 is a schematic diagram of a vehicle according to a first embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of a head-up display device according to a first embodiment of the present disclosure.
  • FIG. 1 is a plan view of a prism according to a first embodiment of the present disclosure.
  • FIG. 1 is a side view of a prism according to a first embodiment of the present disclosure.
  • FIG. 3 is a diagram showing a virtual image overlapping a real scene according to the first embodiment of the present disclosure.
  • FIG. 1 is a plan view of a vehicle traveling on a road according to a first embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram of a head-up display device according to a second embodiment of the present disclosure.
  • FIG. 7 is a perspective view of a prism and a display according to a second embodiment of the present disclosure.
  • FIG. 7 is a vertical cross-sectional view of a prism and a display device according to a second embodiment of the present disclosure.
  • FIG. 7 is a diagram showing a virtual image overlapping a real scene according to a second embodiment of the present disclosure.
  • FIG. 7 is a front view of a concave mirror according to a third embodiment of the present disclosure.
  • FIG. 7 is a plan view of a concave mirror according to a third embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram showing an optical path from a display device to a virtual image according to a third embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram showing an optical path from a display device to a virtual image according to a third embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram showing an optical path from a display device to a virtual image according to a third embodiment of the present disclosure. It is a graph showing the position of each grid of the virtual image display virtual area according to the third embodiment of the present disclosure.
  • FIG. 3 is a schematic diagram of a head-up display device according to a modification of the present disclosure.
  • FIG. 7 is a longitudinal cross-sectional view of a prism and a display device according to a modification of the present disclosure.
  • FIG. 7 is a diagram illustrating a virtual image and a virtual image display virtual area according to a modification of the present disclosure.
  • FIG. 7 is a longitudinal cross-sectional view of a prism and a display device according to a modification of the present disclosure.
  • FIG. 7 is a plan view of a prism according to a modification of the present disclosure.
  • the head-up display device 100 is mounted on the dashboard of a vehicle 200.
  • the head-up display device 100 displays a plurality of virtual images V1 and V2 including vehicle information by projecting display light L onto a windshield 201, which is an example of a projected member.
  • the viewpoint EP of the viewer 1 is within the visible region R, the viewer 1 can visually recognize the virtual images V1 and V2.
  • the virtual image V1 is displayed within the virtual image display virtual area K1.
  • the virtual image V2 is displayed within the virtual image display virtual area K2.
  • the plurality of virtual image display virtual regions K1 and K2 are each formed of a non-substantive plane and are tilted in different directions.
  • the virtual image display virtual region K1 extends along the height direction.
  • along the height direction means that the virtual image display virtual region K1 is less than ⁇ 45° with respect to the height direction.
  • the virtual image display virtual region K2 is inclined so as to intersect with the virtual image display virtual region K1.
  • the virtual image display virtual area K2 is along the road surface.
  • “along the road surface” means that the virtual image display virtual region K2 is less than ⁇ 45° with respect to the horizontal direction.
  • the virtual image display virtual region K2 tilts upward as it moves away from the viewer 1.
  • the point P where the two virtual image display virtual areas K1 and K2 intersect is located below the center of the virtual image display virtual area K1 in the height direction.
  • the virtual image V2 is displayed along the road surface, which is the real scenery, when viewed from the viewer 1.
  • the virtual image V1 is displayed so as to stand up against the road surface, which is a real scene when viewed from the viewer 1.
  • the virtual image V2 includes information associated with the road surface, for example, symbolic information such as route guidance arrows.
  • the virtual image V1 includes character information such as vehicle speed or sign information. Characters include numbers, alphabets, hiragana, katakana, kanji, etc.
  • the virtual image V1 may include an icon indicating a structure erected on the ground, such as a building or a tree. By comparing with this icon, the viewer 1 can easily recognize that the virtual images V1 other than this icon are also displayed along the height direction.
  • the virtual image display virtual regions K1 and K2 are arranged along the vehicle width direction (left-right direction). As shown in FIG. 6, among the virtual image display areas K1 and K2, the virtual image display virtual area K2 is located at a position close to the center line C of the vehicle 200, and the virtual image display virtual area K1 is located at a position far from the center line C of the vehicle 200. is located. For example, as shown in FIG. 6, when the vehicle 200 is a left-hand drive vehicle, the virtual image display virtual area K2 is located on the right side and the virtual image display virtual area K1 is located on the left side when viewed from the viewer 1.
  • the virtual image display virtual region K2 along the road surface is located on the left side when viewed from the viewer 1, and the virtual image display virtual region K1 is located on the right side. This increases the visibility of the virtual images V1 and V2.
  • the head-up display device 100 includes a concave mirror 12, which is an optical relay, a display device 20, a control unit 25, a case 30, and a prism 140, which is an example of a virtual image direction adjusting means. Be prepared.
  • the vehicle 200 also includes a viewpoint detection section 205.
  • the case 30 is made of light-shielding resin or metal and is shaped like a box.
  • the case 30 houses the concave mirror 12, the display 20, and the prism 140.
  • the case 30 includes a window portion 31 made of a light-transmitting member that transmits the display light L generated in the internal space of the case 30 toward the windshield 201 .
  • the display 20 has a display surface 21 that emits display light L representing an image.
  • the display 20 may be of a type that includes a liquid crystal panel and a lighting device, or may be of a type that includes a reflective display element such as a DMD (Digital Micro Mirror Device) element and a projector.
  • the display surface 21 faces toward the lower front of the vehicle 200.
  • the image displayed on the display surface 21 is subjected to distortion correction to correct the distortion of the virtual images V1 and V2 visually recognized by the viewer 1.
  • the display surface 21 is inclined with respect to the optical axis center La of the display light L.
  • the optical axis center La is located at the center of the cross section of the display light L.
  • the display surface 21 includes a first region 20a that emits display light L corresponding to the virtual image V1, and a second region 20b that emits display light L corresponding to the virtual image V2. Character information is displayed in the first area 20a, and symbolic information is displayed in the second area 20b.
  • the control unit 25 includes a CPU (Central Processing Unit), a GDC (Graphics Display Controller), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.
  • the control unit 25 acquires information such as vehicle speed and route guidance and information related to the detection results of the viewpoint detection unit 205 from the outside, and generates an image to be displayed on the display screen 21 based on these information.
  • the prism 140 is installed on the display surface 21, and the display light L emitted from the display surface 21 passes therethrough. The prism 140 will be explained in detail later.
  • the concave mirror 12 has a reflective surface 12a that curves concavely along the height and width directions of the vehicle.
  • the concave mirror 12 reflects the display light L that has passed through the prism 140 toward the windshield 201 .
  • the concave mirror 12 reflects the display light L from the display surface 21 toward the windshield 201 so as to magnify it.
  • a reflective surface 12a of the concave mirror 12 faces toward the rear and upper side of the vehicle 200.
  • the concave mirror 12 has a function of suppressing distortion of the virtual image due to reflection on the windshield 201.
  • the prism 140 is formed into a substantially plate shape that covers the display surface 21 .
  • the display surface 21 has a rectangular shape long in the vehicle width direction
  • the prism 140 has a rectangular thick plate shape long in the vehicle width direction.
  • the prism 140 has an entrance surface 141i that is positioned opposite to the display surface 21 and receives display light from the display surface 21, and an exit surface 141o that is located on the opposite side of the entrance surface 141i and that outputs the incident display light L. and.
  • the entrance surface 141i is formed into a rectangular planar shape.
  • the entrance surface 141i of the prism 140 may be fixed to the display surface 21 by optical bonding, or the prism 140 may be supported by a support mechanism (not shown).
  • the output surface 141o includes a first top surface 142 that is parallel to the display surface 21, and an inclined surface 143 that is inclined with respect to the first top surface 142.
  • the first top surface 142 and the inclined surface 143 are arranged along the vehicle width direction.
  • the first top surface 142 and the inclined surface 143 have the same length in the height direction.
  • the area of the inclined surface 143 is larger than the area of the first top surface 142 because the inclined surface 143 is inclined.
  • a portion of the prism 140 corresponding to the inclined surface 143 has a right triangular columnar shape extending along the vehicle width direction, and the inclined surface 143 is located on the inclined surface of this columnar shape.
  • a portion of the prism 140 corresponding to the first top surface 142 has a rectangular thick plate shape whose thickness direction is perpendicular to the display surface 21 .
  • the first top surface 142 intersects with the inclined surface 143 when viewed from the vehicle width direction.
  • the prism 140 is formed with a virtual display plane 148A and a virtual display plane 148B located at the center of the prism 140 in the thickness direction. Due to its refractive index n, prism 140 causes display surface 21 to function as if it were located at virtual display plane 148A and virtual display plane 148B. Therefore, the prism 140 allows one display surface 21 to perform the same function as a plurality of display surfaces.
  • the virtual display plane 148A is located between the first top surface 142 and the entrance surface 141i, and is formed in the same planar shape as the first top surface 142.
  • Virtual display plane 148B is formed between inclined surface 143 and entrance surface 141i.
  • the virtual display plane 148B extends so as to equally divide the angle ⁇ between the incident surface 141i and the inclined surface 143 into two.
  • Virtual display plane 148A corresponds to virtual image display virtual area K1.
  • Virtual display plane 148B corresponds to virtual image display virtual area K2.
  • the virtual display plane 148A is parallel to the display surface 21. Therefore, the virtual image display virtual area K1 corresponding to the virtual display plane 148A extends along the height direction.
  • Virtual display plane 148B is inclined with respect to display surface 21. Therefore, the virtual image display virtual area K2 corresponding to the virtual display plane 148B is inclined with respect to the height direction.
  • the inclination angle of the virtual image display virtual area K2 with respect to the virtual image display virtual area K1 is determined according to the inclination angle of the virtual display plane 148B with respect to the virtual display plane 148A.
  • the viewpoint detection unit 205 detects the position of the viewpoint EP of the viewer 1, and outputs the detection result to the control unit 25.
  • the viewpoint detection unit 205 includes, for example, a camera (not shown) that photographs the viewpoint EP of the viewer 1, and a viewpoint acquisition unit (not shown) that acquires the position of the viewpoint EP based on data captured by the camera. .
  • This viewpoint acquisition section may be a part of the control section 25 or may be configured separately from the control section 25.
  • the control unit 25 determines that the viewpoint EP of the viewer 1 is located within the eyebox (visible region R) based on the detection result of the viewpoint detection unit 205, the control unit 25 controls the display of both the two virtual images V1 and V2. To give permission.
  • the control unit 25 determines that the viewpoint of the viewer 1 has deviated from the visible region R to the right based on the detection result of the viewpoint detection unit 205, the control unit 25 changes the display of the left virtual image V1 while continuing to display the right virtual image V2. erase. This prevents the virtual image V1, which is originally displayed in the virtual image display virtual area K1, from appearing to be displayed in the virtual image display virtual area K2 when the viewpoint of the viewer 1 deviates from the visible area R to the right side. suppressed.
  • the control unit 25 determines that the viewpoint of the viewer 1 has deviated from the visible region R to the left based on the detection result of the viewpoint detection unit 205, the control unit 25 displays the virtual image V2 on the right while continuing to display the virtual image V1 on the left.
  • the configuration of erasing the display of either the virtual images V1 or V2 as the viewer 1 moves the viewpoint described above may be omitted.
  • the viewpoint detection unit 205 can also be omitted.
  • the display light L When the display light L is emitted from the display surface 21, the display light L enters the prism 140.
  • the prism 140 functions in the same way as when the display light L is emitted from the virtual display plane 148A and the virtual display plane 148B in mutually different directions.
  • After the display light L passes through the prism 140 it is reflected by the concave mirror 12 toward the windshield 201.
  • the display light L reflects off the windshield 201 and reaches the viewer 1.
  • the plurality of virtual images V1 and V2 are displayed in mutually different orientations, corresponding to the orientations of the virtual display plane 148A and the virtual display plane 148B.
  • the head-up display device 100 includes a display device 20 having a display surface 21 that emits display light L, and a prism 140 that transmits the display light L emitted from the display surface 21.
  • the prism 140 includes an entrance surface 141i through which the display light L from the display surface 21 is incident, and an exit surface 141o through which the display light L that has entered the prism 140 from the entrance surface 141i is output.
  • the output surface 141o includes a first top surface 142 that extends in a direction along the display surface 21, and an inclined surface 143 that is inclined with respect to the first top surface 142. According to this configuration, the first top surface 142 and the inclined surface 143 of the prism 140 allow one display 20 to display two virtual images V1 and V2 in different directions. Therefore, two displays are not required, and the head-up display device 100 can be made smaller.
  • the display surface 21 includes a first region 20a that emits the display light L that passes through the first top surface 142, and a second region 20b that emits the display light L that passes through the inclined surface 143. .
  • Text information is displayed in the first area 20a.
  • Symbol information is displayed in the second area 20b.
  • the head-up display device 100 projects the display light L onto the windshield 201, which is an example of a member to be projected, to create a virtual image V1, which is an example of a first virtual image, and a virtual image V2, which is an example of a second virtual image. is displayed so as to be visible to viewer 1.
  • the head-up display device 100 includes a virtual image display virtual area K1, which is an example of a first virtual image display virtual area where the virtual image V1 is displayed, and a virtual image display virtual area K2, which is an example of the second virtual image display virtual area where the virtual image V2 is displayed.
  • a virtual image display virtual area K1 which is an example of a first virtual image display virtual area where the virtual image V1 is displayed
  • a virtual image display virtual area K2 which is an example of the second virtual image display virtual area where the virtual image V2 is displayed.
  • a prism 140 is provided, which is an example of a virtual image orientation setting unit that sets the virtual image orientation to be inclined with respect to the virtual image display virtual region K1. According to this configuration, the visibility of the virtual images V1 and V2 can be improved by arranging the two virtual images V1 and V2 in the left-right direction and making the directions of the two virtual images V1 and V2 different.
  • the head-up display device 100 includes a display 20 having a display surface 21 that emits display light L.
  • the display light L emitted from the display surface 21 passes through the prism 140 .
  • the prism 140 is a surface that emits the display light L, and includes an inclined surface 143 that is formed in a region of the display light L that corresponds to the virtual image display virtual region K2 and is inclined with respect to the display surface 21. According to this configuration, simply by providing the prism 140, the direction of the virtual image display virtual region K2 can be easily made to intersect with the virtual image display virtual region K1. For example, it is possible to realize a configuration in which the virtual image display virtual area K1 is raised while the virtual image display virtual area K2 is laid down.
  • the head-up display device 100 acquires the positional information of the viewpoint EP of the viewer 1, and determines that the viewpoint EP of the viewer 1 deviates from the eye box (visible region R) to the right based on the acquired positional information.
  • the display of the left virtual image V1 of the virtual images V1 and V2 is erased, and when it is judged that the viewpoint EP of the viewer 1 has moved to the left from the eye box based on the acquired position information, the display of the right virtual image of the virtual images V1 and V2 is erased. It includes a control section 25 that turns off the display of V2.
  • the virtual image V1 that is originally displayed in the virtual image display virtual region K1 appears to be displayed in the virtual image display virtual region K2.
  • the viewpoint of the viewer 1 deviates from the visible region R to the left side, it is suppressed that the virtual image V2, which is originally displayed in the virtual image display virtual region K2, appears to be displayed in the virtual image display virtual region K1. be done. Therefore, the visibility of the virtual images V1 and V2 can be improved.
  • the head-up display device 100 is mounted on the vehicle 200.
  • the virtual image V2 along the road surface is located closer to the center line C of the vehicle 200 than the virtual image V1, which is an elevational image. According to this configuration, the display of the virtual image V1 is suppressed from interfering with the viewer 1's visual recognition of the road condition.
  • FIGS. 8 and 9 the prism 40 and the display 20 have a rectangular plate shape that is long in the height direction.
  • the prism 40 is located corresponding to the display surface 21, and has an entrance surface 41i into which the display light from the display surface 21 is incident, and an exit surface 41o through which the display light L that has entered the prism 40 via the entrance surface 41i is output. , is provided.
  • the output surface 41o includes a first top surface 42 that is parallel to the display surface 21, and an inclined surface 43 that is inclined with respect to the first top surface 42.
  • the first top surface 42 and the inclined surface 43 are continuous in the height direction.
  • the first top surface 42 is located above the inclined surface 43.
  • the inclined surface 43 is inclined so as to approach the display 20 as it goes downward. Note that the display device 20 and the prism 40 may have a rectangular plate shape that is long in the width direction.
  • the virtual display plane 48A is located between the first top surface 42 and the entrance surface 41i.
  • the virtual display plane 48B is located between the inclined surface 43 and the incident surface 41i, and extends in a direction that bisects the angle ⁇ formed by the inclined surface 43 and the incident surface 41i, for example.
  • the optical axis center La of the display light L passes through the boundary between the virtual display plane 48A and the virtual display plane 48B. Note that the optical axis center La of the display light L may not pass through the boundary, but may pass through the virtual display plane 48A and the virtual display plane 48B.
  • the angle ⁇ 1 of the extension line (the broken line in FIG. 9) of the virtual display plane 48A with respect to the optical axis center La is smaller than the angle ⁇ 2 of the virtual display plane 48B with respect to the optical axis center La.
  • the virtual display plane 48A corresponds to a virtual image display virtual area K1 along the height direction.
  • Virtual display plane 48B corresponds to virtual image display virtual area K2 that is inclined with respect to virtual image display virtual area K1.
  • the upper end of the virtual display plane 48A corresponds to the lower end of the virtual image display virtual region K1
  • the lower end of the virtual display plane 48B corresponds to the upper end of the virtual image display virtual region K2. That is, the images of the virtual display plane 48A and the virtual display plane 48B are displayed as virtual images V1 and V2 by being reversed in the height direction and the vehicle longitudinal direction.
  • the virtual image display virtual region K2 is located above the virtual image display virtual region K1 when viewed from the viewer 1.
  • the upper end of the virtual image display virtual area K1 is in contact with the lower end of the virtual image display virtual area K2.
  • the virtual image display virtual area K2 slopes upward as it moves away from the viewer 1.
  • a head-up display device according to a third embodiment of the present disclosure will be described with reference to the drawings.
  • This embodiment differs from the first embodiment in that the direction of the virtual image is changed by changing the curvature of a concave mirror instead of the prism.
  • differences from the first embodiment will be mainly described.
  • the reflective surface 12a of the concave mirror 12 has a long shape in the vehicle width direction (horizontal direction) when the concave mirror 12 is viewed from the front.
  • the curvature of the reflective surface 12a is formed so that in the vehicle width direction (longitudinal direction of the reflective surface 12a), the curve becomes larger toward the right side Rd, that is, the curve gradually becomes steeper toward the right side Rd. has been done. Due to this change in curvature, the thickness H of the concave mirror 12 in plan view increases toward the right side Rd.
  • the region 12R on the right side Rd of the reflective surface 12a reflects the light corresponding to the virtual image V2 of the display light L.
  • the region 12L on the left side Ld of the reflective surface 12a reflects the light corresponding to the virtual image V1 of the display light L.
  • the average curvature of the region 12R is larger than the average curvature of the region 12L.
  • the magnification of the size of the virtual images V1 and V2 increases. Therefore, since "average curvature of region 12R>average curvature of region 12L", the size of virtual image display virtual region K2 becomes larger than the size of virtual image display virtual region K1, as shown in FIGS. 13 and 14.
  • the tilt angle ⁇ 2 (see FIG. 14) of the virtual image V2 displayed by the display light L passing through the region 12R of the reflective surface 12a is the tilt angle ⁇ 2 of the virtual image V1 displayed by the display light L passing through the region 12L of the reflective surface 12a. It becomes larger than ⁇ 1 (see FIG. 13).
  • the graph line L1 is a line connecting the plot points in the first column located first from the top among the plot points.
  • the graph line L2 is a line connecting the plot points in the second column located second from the top among the plot points.
  • the graph line L3 is a line connecting the plot points in the third column located third from the top among the plot points.
  • Graph line L4 is a line connecting plot points in the fourth column located fourth from the top among the plot points.
  • Graph line L5 is a line connecting plot points in the fifth column located fifth from the top among the plot points.
  • the plot points corresponding to the virtual image display virtual region K2 and the virtual image V2 on the right side Rd have rough distances between each graph line L1 to L5, and it is clear that the virtual image display virtual region K2 is tilted. Recognize.
  • the distances between the graph lines L1 to L5 are close, and the slope of the virtual image display virtual region K1 is small. It can also be seen that the inclination angle gradually changes between the two virtual image display virtual regions K1 and K2.
  • the rectangular thick plate-shaped portion of the prism 140 including the first top surface 142 may be omitted.
  • the prism 140 may be formed in a triangular prism shape including an inclined surface 143, and may be provided only in the second region 20b of the display surface 21.
  • the second embodiment is similar to this, and the rectangular thick plate-shaped portion of the prism 40 including the first top surface 42 may be omitted.
  • the display light L is directly irradiated from the display surface 21 to the concave mirror 12; however, the present invention is not limited to this, and correction is performed to reflect the display light L irradiated from the display surface 21 toward the concave mirror 12.
  • a mirror may be newly provided.
  • This correction mirror is, for example, a concave mirror with a concave longitudinal section.
  • This correction mirror and the concave mirror 12 may constitute an optical relay that guides the display light L from the display surface 21 to the windshield 201.
  • the concave mirror 12 may be configured to be rotatable about a rotation axis extending along the vehicle width direction. By rotating the concave mirror 12 around this rotation axis, the height at which the display light L is projected onto the viewer 1 is adjusted.
  • the display light L may not be emitted from the non-display area 21a (see FIG. 9) of the display surface 21 that corresponds to the boundary between the virtual display planes 48A and 48B. Thereby, when the viewer's viewpoint is moved within the visible region, the display is suppressed from going back and forth between the virtual images V1 and V2, and the sense of discomfort given to the viewer can be reduced.
  • the display light L is not limited to this modification, and may be configured to use a light shielding means such as a light shielding member so that the display light L does not reach the boundary between the virtual display planes 48A and 48B.
  • the non-display area 21a or the light shielding means may be similarly employed.
  • the prisms 40 and 140 in each of the above embodiments can be changed as appropriate. Modifications of the shape of the prism and the arrangement of the virtual images will be described with reference to FIGS. 16 to 20.
  • the output surface 241o of the prism 240 includes a first top surface 242 parallel to the display surface 21 and an inclined surface 243 inclined with respect to the first top surface 242.
  • the slope 243 slopes away from the display surface 21 as it moves away from the first top surface 242 in the height direction.
  • the inclined surface 243 is located above the first top surface 242.
  • the virtual display plane 248A is formed at the center of the first top surface 242 and the entrance surface 241i.
  • a virtual display plane 248B is formed at the center of the inclined surface 243 and the incident surface 241i.
  • the virtual image display area K2 is located below the virtual image display area K1, and the lower end of the virtual image display area K1 along the height direction corresponds to the upper end of the virtual image display virtual area K2 along the road surface. located. Thereby, the virtual image V2 along the road surface can be displayed at a position close to the viewer 1.
  • the second top surface 244 is formed at a position farther from the display surface 21 than the first top surface 242.
  • the second top surface 244 is located on the opposite side of the inclined surface 243 from the first top surface 242 in the height direction.
  • the inclined surface 243 is formed to connect the first top surface 242 and the second top surface 244.
  • the thickness of the portion of the prism 240A corresponding to the second top surface 244 is formed to be larger than the thickness of the portion of the prism 240A corresponding to the first top surface 242.
  • the virtual display plane 248C is formed at the center of the second top surface 244 and the entrance surface 241i.
  • one display 20 can display three virtual images V1, V2, and V3 in different directions.
  • the exit surface 441o of the prism 440 includes an inclined curved surface 443 and a curved top surface 442.
  • the curved top surface 442 is formed to bulge out in a convex shape along the height direction.
  • the inclined curved surface 443 is formed in a concave shape along the height direction.
  • the curvature of the curved top surface 442 is larger than the curvature of the inclined curved surface 443.
  • the curvature of the curved top surface 442 gradually decreases as it approaches the inclined curved surface 443, and the curvature of the inclined curved surface 443 gradually decreases as it approaches the curved top surface 442. Thereby, the curved top surface 442 and the inclined curved surface 443 are smoothly connected.
  • the virtual display plane 448A is formed in a curved shape corresponding to the curved top surface 442 between the curved top surface 442 and the entrance surface 41i.
  • the virtual display plane 448B is formed in a curved shape corresponding to the inclined curved surface 443 between the inclined curved surface 443 and the entrance surface 41i.
  • the corners between the virtual image display virtual regions K1 and K2 are rounded, and the virtual image display virtual regions K1 and K2 are connected so as to be smoothly continuous.
  • the lengths of the inclined surface 143 and the first top surface 142 in the height direction are the same; However, these lengths may be different.
  • the length of the inclined surface 543 in the height direction is smaller than the length of the first top surface 542 in the height direction.
  • the inclined surface 543 is configured to be sandwiched between the first top surface 542 in the height direction. That is, in the modified example shown in FIG. 20, the inclined surface 543 is surrounded by the first top surface 542 from three directions (in this example, the top, bottom, and right directions). Note that the slope surface 543 is not limited to the modification shown in FIG. It may be surrounded by the first top surface 542 from the right two directions). Thereby, a part of the virtual image display virtual area K1 can be made into the virtual image display virtual area K2, and various display modes of the virtual images V1 and V2 can be realized. Note that the inclined surface 543 and the first top surface 542 may be set in opposite ranges.
  • the prisms 40, 140, 240, 240A, and 440 may be formed of ulexite, that is, television stone. This makes it possible to form a virtual display plane on the light exit surfaces of the prisms 40, 140, 240, 240A, and 440.
  • the prism 40A may include a protruding portion 49 protruding from the display surface 21, as shown by the dashed line in FIG.
  • the protruding portion 49 transmits light from the display surface 21 toward the upper end of the reflective surface 12a (see FIG. 7) of the concave mirror 12, out of the display light L.
  • the protruding portion 49 is provided on the upper side surface of the prism 40 of the second embodiment, and is formed to increase in height as it approaches the output surface 41o from the display surface 21. Thereby, the entire area of the reflective surface 12a of the concave mirror 12 can be used effectively, and the size of the virtual image display virtual area K1 can be increased.
  • each of the prisms 40, 40A, 140, 240, 240A, and 440 may be rounded.
  • the top surface portion and the inclined surface portion of each of the prisms 40, 40A, 140, 240, 240A, and 440 may be formed separately.
  • a prism may be combined with the configuration of changing the curvature of the reflective surface 12a of the third embodiment. Thereby, the virtual image display virtual area K2 can be tilted more greatly.
  • the curvature of the reflective surface 12a is formed to gradually increase toward the right side Rd, but the curvature is not limited to this, and each of the two regions 12L and 12R of the reflective surface 12a Different constant curvatures may be set.
  • the head-up display device 100 is mounted on a vehicle, but the head-up display device 100 is not limited to this, and may be mounted on a vehicle such as an airplane or a ship.
  • the projected member is not limited to the windshield 201, but may be a dedicated combiner.
  • the display light L may be crossed within the optical path by the convergence effect of a mirror or lens. Even in this case, the effects of the present invention can be exerted if the prism and display are configured as appropriate in accordance with the form of the desired virtual image. For example, when the display light L crosses once in the vertical direction within the optical path, the prism and the display may be provided upside down compared to when the display light L does not cross.

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Abstract

Provided is a head-up display device that can be reduced in size. A head-up display device 100 comprises a display unit 20 having a display surface 21 that emits display light L, and a prism 140 that transmits the display light L emitted from the display surface 21. The prism 140 comprises an incidence surface 141i on which the display light L from the display surface 21 is incident, and an emission surface 141o for emitting the display light L incident on the prism 140 from the incidence surface 141i. The emission surface 141o comprises a first top surface 142 extending in the direction along the display surface 21, and an inclined surface 143 that is inclined relative to the first top surface 142.

Description

ヘッドアップディスプレイ装置heads up display device
　本開示は、ヘッドアップディスプレイ装置に関する。 The present disclosure relates to a head-up display device.
　例えば、特許文献１に記載の表示装置は、第一の表示パネル及び第二の表示パネルを備えるとともに、第一の表示パネルと第二の表示パネルの角度が略９０°になるように、第一の表示パネル及び第二の表示パネルを近設させ、第一の表示パネルが発する第一の表示光及び第二の表示パネルが発する第二の表示光を反射させて角度の異なる２つの虚像を表示する。 For example, the display device described in Patent Document 1 includes a first display panel and a second display panel, and the display device includes a first display panel and a second display panel such that the angle between the first display panel and the second display panel is approximately 90°. A first display panel and a second display panel are placed close to each other, and a first display light emitted by the first display panel and a second display light emitted by the second display panel are reflected to create two virtual images at different angles. Display.
特許第４８８３２８３号公報Patent No. 4883283
　上記特許文献１に記載の構成においては、複数の表示パネルが必要となり、ヘッドアップディスプレイ装置が大型化していた。 In the configuration described in Patent Document 1, a plurality of display panels are required, resulting in an increase in the size of the head-up display device.
　本開示は、上記実状を鑑みてなされたものであり、小型化を図ることができるヘッドアップディスプレイ装置を提供することを目的とする。 The present disclosure has been made in view of the above-mentioned circumstances, and aims to provide a head-up display device that can be downsized.
　上記目的を達成するため、本開示に係るヘッドアップディスプレイ装置は、表示光を出射する表示面を有する表示器と、前記表示面から出射された前記表示光が透過するプリズムと、を備え、前記プリズムは、前記表示面からの前記表示光を入射する入射面と、前記入射面から前記プリズムに入射した前記表示光を出射する出射面と、を備え、前記出射面は、前記表示面に沿う方向に延びる第１天面と、前記第１天面に対して傾斜した傾斜面と、を備える。 In order to achieve the above object, a head-up display device according to the present disclosure includes a display device having a display surface that emits display light, and a prism through which the display light emitted from the display surface passes, The prism includes an entrance surface that receives the display light from the display surface, and an exit surface that outputs the display light that has entered the prism from the entrance surface, and the exit surface extends along the display surface. The storage device includes a first top surface extending in the direction, and an inclined surface inclined with respect to the first top surface.
　本開示によれば、ヘッドアップディスプレイ装置において、小型化を図ることができる。 According to the present disclosure, it is possible to reduce the size of the head-up display device.
本開示の第１の実施形態に係る車両の概略図である。1 is a schematic diagram of a vehicle according to a first embodiment of the present disclosure. 本開示の第１の実施形態に係るヘッドアップディスプレイ装置の概略図である。FIG. 1 is a schematic diagram of a head-up display device according to a first embodiment of the present disclosure. 本開示の第１の実施形態に係るプリズムの平面図である。FIG. 1 is a plan view of a prism according to a first embodiment of the present disclosure. 本開示の第１の実施形態に係るプリズムの側面図である。FIG. 1 is a side view of a prism according to a first embodiment of the present disclosure. 本開示の第１の実施形態に係る実風景に重なる虚像を示す図である。FIG. 3 is a diagram showing a virtual image overlapping a real scene according to the first embodiment of the present disclosure. 本開示の第１の実施形態に係る道路を走行する車両の平面図である。FIG. 1 is a plan view of a vehicle traveling on a road according to a first embodiment of the present disclosure. 本開示の第２の実施形態に係るヘッドアップディスプレイ装置の概略図である。FIG. 2 is a schematic diagram of a head-up display device according to a second embodiment of the present disclosure. 本開示の第２の実施形態に係るプリズム及び表示器の斜視図である。FIG. 7 is a perspective view of a prism and a display according to a second embodiment of the present disclosure. 本開示の第２の実施形態に係るプリズム及び表示器の縦断面図である。FIG. 7 is a vertical cross-sectional view of a prism and a display device according to a second embodiment of the present disclosure. 本開示の第２の実施形態に係る実風景に重なる虚像を示す図である。FIG. 7 is a diagram showing a virtual image overlapping a real scene according to a second embodiment of the present disclosure. 本開示の第３の実施形態に係る凹面鏡の正面図である。FIG. 7 is a front view of a concave mirror according to a third embodiment of the present disclosure. 本開示の第３の実施形態に係る凹面鏡の平面図である。FIG. 7 is a plan view of a concave mirror according to a third embodiment of the present disclosure. 本開示の第３の実施形態に係る表示器から虚像までの光路を示す概略図である。FIG. 7 is a schematic diagram showing an optical path from a display device to a virtual image according to a third embodiment of the present disclosure. 本開示の第３の実施形態に係る表示器から虚像までの光路を示す概略図である。FIG. 7 is a schematic diagram showing an optical path from a display device to a virtual image according to a third embodiment of the present disclosure. 本開示の第３の実施形態に係る虚像表示仮想領域の各グリッドの位置を示すグラフである。It is a graph showing the position of each grid of the virtual image display virtual area according to the third embodiment of the present disclosure. 本開示の変形例に係るヘッドアップディスプレイ装置の概略図である。FIG. 3 is a schematic diagram of a head-up display device according to a modification of the present disclosure. 本開示の変形例に係るプリズム及び表示器の縦断面図である。FIG. 7 is a longitudinal cross-sectional view of a prism and a display device according to a modification of the present disclosure. 本開示の変形例に係る虚像及び虚像表示仮想領域を示す図である。FIG. 7 is a diagram illustrating a virtual image and a virtual image display virtual area according to a modification of the present disclosure. 本開示の変形例に係るプリズム及び表示器の縦断面図である。FIG. 7 is a longitudinal cross-sectional view of a prism and a display device according to a modification of the present disclosure. 本開示の変形例に係るプリズムの平面図である。FIG. 7 is a plan view of a prism according to a modification of the present disclosure.
　（第１の実施形態）
　本開示の第１の実施形態に係るヘッドアップディスプレイ装置について、図面を参照して説明する。
　図１に示すように、ヘッドアップディスプレイ装置１００は、車両２００のダッシュボードに搭載されている。ヘッドアップディスプレイ装置１００は、表示光Ｌを被投射部材の一例であるウインドシールド２０１に投射することにより、車両情報を含む複数の虚像Ｖ１，Ｖ２を表示する。視認者１の視点ＥＰが可視領域Ｒ内にあるときに、視認者１が虚像Ｖ１，Ｖ２を視認可能となる。虚像Ｖ１は虚像表示仮想領域Ｋ１内に表示される。虚像Ｖ２は虚像表示仮想領域Ｋ２内に表示される。複数の虚像表示仮想領域Ｋ１，Ｋ２は、それぞれ実体のない平面で形成され、互いに異なる向きで傾く。 (First embodiment)
A head-up display device according to a first embodiment of the present disclosure will be described with reference to the drawings.
As shown in FIG. 1, the head-up display device 100 is mounted on the dashboard of a vehicle 200. The head-up display device 100 displays a plurality of virtual images V1 and V2 including vehicle information by projecting display light L onto a windshield 201, which is an example of a projected member. When the viewpoint EP of the viewer 1 is within the visible region R, the viewer 1 can visually recognize the virtual images V1 and V2. The virtual image V1 is displayed within the virtual image display virtual area K1. The virtual image V2 is displayed within the virtual image display virtual area K2. The plurality of virtual image display virtual regions K1 and K2 are each formed of a non-substantive plane and are tilted in different directions.
　図２に示すように、虚像表示仮想領域Ｋ１は、高さ方向に沿って延びる。ここで、高さ方向に沿うとは、虚像表示仮想領域Ｋ１が高さ方向に対して±４５°未満であることを指す。虚像表示仮想領域Ｋ２は、虚像表示仮想領域Ｋ１に交わるように傾斜する。例えば、虚像表示仮想領域Ｋ２は、路面に沿う。ここで、路面に沿うとは、虚像表示仮想領域Ｋ２が水平方向に対して±４５°未満であることを指す。 As shown in FIG. 2, the virtual image display virtual region K1 extends along the height direction. Here, along the height direction means that the virtual image display virtual region K1 is less than ±45° with respect to the height direction. The virtual image display virtual region K2 is inclined so as to intersect with the virtual image display virtual region K1. For example, the virtual image display virtual area K2 is along the road surface. Here, "along the road surface" means that the virtual image display virtual region K2 is less than ±45° with respect to the horizontal direction.
　本例では、虚像表示仮想領域Ｋ２は、視認者１から離れるにつれて上方向に向かうように傾斜する。本例では、車幅方向から見て、２つの虚像表示仮想領域Ｋ１，Ｋ２が交差する点Ｐは、虚像表示仮想領域Ｋ１の高さ方向の中心よりも下側に位置する。 In this example, the virtual image display virtual region K2 tilts upward as it moves away from the viewer 1. In this example, when viewed from the vehicle width direction, the point P where the two virtual image display virtual areas K1 and K2 intersect is located below the center of the virtual image display virtual area K1 in the height direction.
　図５及び図６に示すように、虚像Ｖ２は、視認者１から見て実風景である路面に沿うように表示される。虚像Ｖ１は、視認者１から見て実風景である路面に対して立設するように表示される。虚像Ｖ２には、路面に関連付けられた情報、例えば、経路案内矢印等の記号情報が含まれている。虚像Ｖ１には、車速等の文字情報又は標識情報が含まれている。文字とは、数字、アルファベット、ひらがな、カタカナ、漢字等である。
　なお、虚像Ｖ１には、建物又は樹木等の地面に立設する構造物を示すアイコンが含まれていてもよい。このアイコンとの比較により、このアイコン以外の虚像Ｖ１の表示も高さ方向に沿って表示されていることが視認者１から認識されやすくなる。 As shown in FIGS. 5 and 6, the virtual image V2 is displayed along the road surface, which is the real scenery, when viewed from the viewer 1. The virtual image V1 is displayed so as to stand up against the road surface, which is a real scene when viewed from the viewer 1. The virtual image V2 includes information associated with the road surface, for example, symbolic information such as route guidance arrows. The virtual image V1 includes character information such as vehicle speed or sign information. Characters include numbers, alphabets, hiragana, katakana, kanji, etc.
Note that the virtual image V1 may include an icon indicating a structure erected on the ground, such as a building or a tree. By comparing with this icon, the viewer 1 can easily recognize that the virtual images V1 other than this icon are also displayed along the height direction.
　本実施形態では、虚像表示仮想領域Ｋ１，Ｋ２は、車幅方向（左右方向）に沿って並べられている。図６に示すように、虚像表示仮想領域Ｋ１，Ｋ２のうち車両２００の中心線Ｃに近い位置に虚像表示仮想領域Ｋ２が位置し、車両２００の中心線Ｃから遠い位置に虚像表示仮想領域Ｋ１が位置する。例えば、図６に示すように、車両２００が左ハンドル車両である場合には、視認者１から見て、右側に虚像表示仮想領域Ｋ２が位置し、左側に虚像表示仮想領域Ｋ１が位置する。一方、図示しないが、車両２００が右ハンドル車両である場合には、視認者１から見て、左側に路面に沿う虚像表示仮想領域Ｋ２が位置し、右側に虚像表示仮想領域Ｋ１が位置する。これにより、虚像Ｖ１，Ｖ２の視認性が高まる。 In this embodiment, the virtual image display virtual regions K1 and K2 are arranged along the vehicle width direction (left-right direction). As shown in FIG. 6, among the virtual image display areas K1 and K2, the virtual image display virtual area K2 is located at a position close to the center line C of the vehicle 200, and the virtual image display virtual area K1 is located at a position far from the center line C of the vehicle 200. is located. For example, as shown in FIG. 6, when the vehicle 200 is a left-hand drive vehicle, the virtual image display virtual area K2 is located on the right side and the virtual image display virtual area K1 is located on the left side when viewed from the viewer 1. On the other hand, although not shown, when the vehicle 200 is a right-hand drive vehicle, the virtual image display virtual region K2 along the road surface is located on the left side when viewed from the viewer 1, and the virtual image display virtual region K1 is located on the right side. This increases the visibility of the virtual images V1 and V2.
　次に、ヘッドアップディスプレイ装置１００の構成について説明する。
　図２に示すように、ヘッドアップディスプレイ装置１００は、光学リレーである凹面ミラー１２と、表示器２０と、制御部２５と、ケース３０と、虚像向き調整手段の一例であるプリズム１４０と、を備える。また、車両２００は、視点検出部２０５を備える。 Next, the configuration of the head-up display device 100 will be explained.
As shown in FIG. 2, the head-up display device 100 includes a concave mirror 12, which is an optical relay, a display device 20, a control unit 25, a case 30, and a prism 140, which is an example of a virtual image direction adjusting means. Be prepared. The vehicle 200 also includes a viewpoint detection section 205.
　ケース３０は遮光性の樹脂又は金属により箱状に形成されている。ケース３０内には、凹面ミラー１２、表示器２０及びプリズム１４０が収容されている。ケース３０は、ケース３０の内部空間で生成される表示光Ｌをウインドシールド２０１に向けて透過する光透過性部材からなる窓部３１を備える。 The case 30 is made of light-shielding resin or metal and is shaped like a box. The case 30 houses the concave mirror 12, the display 20, and the prism 140. The case 30 includes a window portion 31 made of a light-transmitting member that transmits the display light L generated in the internal space of the case 30 toward the windshield 201 .
　表示器２０は、画像を表す表示光Ｌを放射する表示面２１を有する。表示器２０は、液晶パネル及び照明装置を有するタイプであってもよいし、ＤＭＤ（Digital Micro mirror Device）素子等の反射型表示素子及びプロジェクタを有するタイプであってもよい。表示面２１は、車両２００の前方下側を向いている。表示面２１に表示される画像には、視認者１が視認する虚像Ｖ１，Ｖ２の歪みを補正する歪み補正が施されている。表示面２１は、表示光Ｌの光軸中心Ｌａに対して傾斜している。光軸中心Ｌａは、表示光Ｌの横断面の中心に位置する。 The display 20 has a display surface 21 that emits display light L representing an image. The display 20 may be of a type that includes a liquid crystal panel and a lighting device, or may be of a type that includes a reflective display element such as a DMD (Digital Micro Mirror Device) element and a projector. The display surface 21 faces toward the lower front of the vehicle 200. The image displayed on the display surface 21 is subjected to distortion correction to correct the distortion of the virtual images V1 and V2 visually recognized by the viewer 1. The display surface 21 is inclined with respect to the optical axis center La of the display light L. The optical axis center La is located at the center of the cross section of the display light L.
　図４に示すように、表示面２１は、虚像Ｖ１に対応する表示光Ｌを出射する第１領域２０ａと、虚像Ｖ２に対応する表示光Ｌを出射する第２領域２０ｂと、を備える。第１領域２０ａには文字情報が表示され、第２領域２０ｂには記号情報が表示される。 As shown in FIG. 4, the display surface 21 includes a first region 20a that emits display light L corresponding to the virtual image V1, and a second region 20b that emits display light L corresponding to the virtual image V2. Character information is displayed in the first area 20a, and symbolic information is displayed in the second area 20b.
　図２に示すように、制御部２５は、ＣＰＵ（Central Processing Unit）、ＧＤＣ（Graphics Display Controller）、ＲＯＭ（Read Only Memory）及びＲＡＭ（Random Access Memory）等を有する。制御部２５は、外部から車速及び経路案内等の情報及び視点検出部２０５の検出結果に係る情報を取得し、これらの情報に基づき表示面２１に表示する画像を生成する。
　プリズム１４０は、表示面２１に設置され、表示面２１から出射された表示光Ｌが透過する。プリズム１４０については後で詳述する。 As shown in FIG. 2, the control unit 25 includes a CPU (Central Processing Unit), a GDC (Graphics Display Controller), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 25 acquires information such as vehicle speed and route guidance and information related to the detection results of the viewpoint detection unit 205 from the outside, and generates an image to be displayed on the display screen 21 based on these information.
The prism 140 is installed on the display surface 21, and the display light L emitted from the display surface 21 passes therethrough. The prism 140 will be explained in detail later.
　図２に示すように、凹面ミラー１２は、車両の高さ方向及び幅方向に沿って凹状に湾曲する反射面１２ａを有する。凹面ミラー１２は、プリズム１４０を透過した表示光Ｌをウインドシールド２０１に向けて反射する。凹面ミラー１２は、表示面２１からの表示光Ｌを拡大するようにウインドシールド２０１に向けて反射する。凹面ミラー１２の反射面１２ａは、車両２００の後方上側を向いている。凹面ミラー１２は、ウインドシールド２０１での反射による虚像の歪みを抑制する機能を有する。 As shown in FIG. 2, the concave mirror 12 has a reflective surface 12a that curves concavely along the height and width directions of the vehicle. The concave mirror 12 reflects the display light L that has passed through the prism 140 toward the windshield 201 . The concave mirror 12 reflects the display light L from the display surface 21 toward the windshield 201 so as to magnify it. A reflective surface 12a of the concave mirror 12 faces toward the rear and upper side of the vehicle 200. The concave mirror 12 has a function of suppressing distortion of the virtual image due to reflection on the windshield 201.
　次に、プリズム１４０の構成について説明する。
　図３及び図４に示すように、プリズム１４０は、屈折率ｎが空気（ｎ＝１）よりも大きい材質、例えば、ガラス又は光学樹脂により形成されている。プリズム１４０は、表示面２１を覆う略板状で形成されている。本例では、表示面２１は車幅方向に長い長方形状をなし、プリズム１４０は車幅方向に長い長方形の厚板状をなす。 Next, the configuration of the prism 140 will be explained.
As shown in FIGS. 3 and 4, the prism 140 is made of a material having a refractive index n greater than that of air (n=1), such as glass or optical resin. The prism 140 is formed into a substantially plate shape that covers the display surface 21 . In this example, the display surface 21 has a rectangular shape long in the vehicle width direction, and the prism 140 has a rectangular thick plate shape long in the vehicle width direction.
　プリズム１４０は、表示面２１に対向して位置し、表示面２１からの表示光を入射する入射面１４１ｉと、入射面１４１ｉの反対側に位置し、入射した表示光Ｌを出射する出射面１４１ｏと、を備える。入射面１４１ｉは矩形平面状に形成されている。プリズム１４０の入射面１４１ｉはオプティカルボンディングにより表示面２１に固定されていてもよいし、プリズム１４０は図示しない支持機構により支持されていてもよい。 The prism 140 has an entrance surface 141i that is positioned opposite to the display surface 21 and receives display light from the display surface 21, and an exit surface 141o that is located on the opposite side of the entrance surface 141i and that outputs the incident display light L. and. The entrance surface 141i is formed into a rectangular planar shape. The entrance surface 141i of the prism 140 may be fixed to the display surface 21 by optical bonding, or the prism 140 may be supported by a support mechanism (not shown).
　図２、図３及び図４に示すように、出射面１４１ｏは、表示面２１と平行をなす第１天面１４２と、第１天面１４２に対して傾斜した傾斜面１４３と、を備える。
　第１天面１４２及び傾斜面１４３は、車幅方向に沿って並べられている。第１天面１４２及び傾斜面１４３は、高さ方向に同じ長さである。傾斜面１４３の面積は、傾斜面１４３が傾斜しているため、第１天面１４２の面積よりも大きい。プリズム１４０の傾斜面１４３に対応する部位は、車幅方向に沿って延びる直角三角形の柱状をなし、傾斜面１４３は、この柱状の斜面に位置する。プリズム１４０の第１天面１４２に対応する部位は、表示面２１に直交する方向が厚さ方向となる矩形厚板状をなす。第１天面１４２は、車幅方向から見て傾斜面１４３に交差する。 As shown in FIGS. 2, 3, and 4, the output surface 141o includes a first top surface 142 that is parallel to the display surface 21, and an inclined surface 143 that is inclined with respect to the first top surface 142.
The first top surface 142 and the inclined surface 143 are arranged along the vehicle width direction. The first top surface 142 and the inclined surface 143 have the same length in the height direction. The area of the inclined surface 143 is larger than the area of the first top surface 142 because the inclined surface 143 is inclined. A portion of the prism 140 corresponding to the inclined surface 143 has a right triangular columnar shape extending along the vehicle width direction, and the inclined surface 143 is located on the inclined surface of this columnar shape. A portion of the prism 140 corresponding to the first top surface 142 has a rectangular thick plate shape whose thickness direction is perpendicular to the display surface 21 . The first top surface 142 intersects with the inclined surface 143 when viewed from the vehicle width direction.
　図２の下部に示すように、プリズム１４０には、プリズム１４０の厚さ方向の中心に位置する仮想ディスプレイ平面１４８Ａ及び仮想ディスプレイ平面１４８Ｂが形成される。プリズム１４０は、自身の屈折率ｎにより、表示面２１を、あたかも仮想ディスプレイ平面１４８Ａ及び仮想ディスプレイ平面１４８Ｂに位置しているかのように機能させる。よって、プリズム１４０により、１枚の表示面２１で、複数枚の表示面と同様の働きを可能とする。仮想ディスプレイ平面１４８Ａは、第１天面１４２と入射面１４１ｉの間に位置し、第１天面１４２と同一の平面状に形成される。仮想ディスプレイ平面１４８Ｂは、傾斜面１４３と入射面１４１ｉの間に形成される。仮想ディスプレイ平面１４８Ｂは、入射面１４１ｉと傾斜面１４３がなす角度αを２等分するように延びる。仮想ディスプレイ平面１４８Ａは虚像表示仮想領域Ｋ１に対応する。仮想ディスプレイ平面１４８Ｂは虚像表示仮想領域Ｋ２に対応する。 As shown in the lower part of FIG. 2, the prism 140 is formed with a virtual display plane 148A and a virtual display plane 148B located at the center of the prism 140 in the thickness direction. Due to its refractive index n, prism 140 causes display surface 21 to function as if it were located at virtual display plane 148A and virtual display plane 148B. Therefore, the prism 140 allows one display surface 21 to perform the same function as a plurality of display surfaces. The virtual display plane 148A is located between the first top surface 142 and the entrance surface 141i, and is formed in the same planar shape as the first top surface 142. Virtual display plane 148B is formed between inclined surface 143 and entrance surface 141i. The virtual display plane 148B extends so as to equally divide the angle α between the incident surface 141i and the inclined surface 143 into two. Virtual display plane 148A corresponds to virtual image display virtual area K1. Virtual display plane 148B corresponds to virtual image display virtual area K2.
　仮想ディスプレイ平面１４８Ａは、表示面２１と平行をなしている。このため、仮想ディスプレイ平面１４８Ａに対応する虚像表示仮想領域Ｋ１は、高さ方向に沿って延びている。仮想ディスプレイ平面１４８Ｂは、表示面２１に対して傾斜している。このため、仮想ディスプレイ平面１４８Ｂに対応する虚像表示仮想領域Ｋ２は、高さ方向に対して傾斜している。仮想ディスプレイ平面１４８Ｂの仮想ディスプレイ平面１４８Ａに対する傾斜角度に応じて、虚像表示仮想領域Ｋ２の虚像表示仮想領域Ｋ１に対する傾斜角度が決まる。 The virtual display plane 148A is parallel to the display surface 21. Therefore, the virtual image display virtual area K1 corresponding to the virtual display plane 148A extends along the height direction. Virtual display plane 148B is inclined with respect to display surface 21. Therefore, the virtual image display virtual area K2 corresponding to the virtual display plane 148B is inclined with respect to the height direction. The inclination angle of the virtual image display virtual area K2 with respect to the virtual image display virtual area K1 is determined according to the inclination angle of the virtual display plane 148B with respect to the virtual display plane 148A.
　図２に示すように、視点検出部２０５は、視認者１の視点ＥＰの位置を検出し、検出結果を制御部２５に出力する。視点検出部２０５は、例えば、視認者１の視点ＥＰを撮影するカメラ（図示略）と、カメラにより撮像されたデータに基づき視点ＥＰの位置を取得する視点取得部（図示略）と、を備える。この視点取得部は、制御部２５の一部であってもよいし、制御部２５とは別の構成であってもよい。制御部２５は、視点検出部２０５の検出結果に基づき、視認者１の視点ＥＰがアイボックス（可視領域Ｒ）内に位置していると判別すると、２つの虚像Ｖ１，Ｖ２の両方の表示を許可する。制御部２５は、視点検出部２０５の検出結果に基づき、視認者１の視点が可視領域Ｒから右側に外れたと判断すると、右側の虚像Ｖ２の表示を継続しつつ、左側の虚像Ｖ１の表示を消す。これにより、視認者１の視点が可視領域Ｒから右側に外れたときに、本来、虚像表示仮想領域Ｋ１に表示される虚像Ｖ１が虚像表示仮想領域Ｋ２に表示されるように見えてしまうことが抑制される。制御部２５は、視点検出部２０５の検出結果に基づき、視認者１の視点が可視領域Ｒから左側に外れたと判断すると、左側の虚像Ｖ１の表示を継続しつつ、右側の虚像Ｖ２の表示を消す。これにより、視認者１の視点が可視領域Ｒから左側に外れたときに、本来、虚像表示仮想領域Ｋ２に表示される虚像Ｖ２が虚像表示仮想領域Ｋ１に表示されるように見えてしまうことが抑制される。
　なお、本実施形態において、上述した視認者１の視点移動に伴い虚像Ｖ１，Ｖ２の何れかの表示を消す構成は省略されてもよい。この場合、視点検出部２０５も省略可能である。 As shown in FIG. 2, the viewpoint detection unit 205 detects the position of the viewpoint EP of the viewer 1, and outputs the detection result to the control unit 25. The viewpoint detection unit 205 includes, for example, a camera (not shown) that photographs the viewpoint EP of the viewer 1, and a viewpoint acquisition unit (not shown) that acquires the position of the viewpoint EP based on data captured by the camera. . This viewpoint acquisition section may be a part of the control section 25 or may be configured separately from the control section 25. When the control unit 25 determines that the viewpoint EP of the viewer 1 is located within the eyebox (visible region R) based on the detection result of the viewpoint detection unit 205, the control unit 25 controls the display of both the two virtual images V1 and V2. To give permission. When the control unit 25 determines that the viewpoint of the viewer 1 has deviated from the visible region R to the right based on the detection result of the viewpoint detection unit 205, the control unit 25 changes the display of the left virtual image V1 while continuing to display the right virtual image V2. erase. This prevents the virtual image V1, which is originally displayed in the virtual image display virtual area K1, from appearing to be displayed in the virtual image display virtual area K2 when the viewpoint of the viewer 1 deviates from the visible area R to the right side. suppressed. When the control unit 25 determines that the viewpoint of the viewer 1 has deviated from the visible region R to the left based on the detection result of the viewpoint detection unit 205, the control unit 25 displays the virtual image V2 on the right while continuing to display the virtual image V1 on the left. erase. This prevents the virtual image V2, which is originally displayed in the virtual image display virtual area K2, from appearing to be displayed in the virtual image display virtual area K1 when the viewpoint of the viewer 1 deviates from the visible area R to the left side. suppressed.
In addition, in this embodiment, the configuration of erasing the display of either the virtual images V1 or V2 as the viewer 1 moves the viewpoint described above may be omitted. In this case, the viewpoint detection unit 205 can also be omitted.
　次に、ヘッドアップディスプレイ装置１００の作用について説明する。
　表示面２１から表示光Ｌが出射されると、表示光Ｌがプリズム１４０に入射する。プリズム１４０により、互いに異なる向きの仮想ディスプレイ平面１４８Ａ及び仮想ディスプレイ平面１４８Ｂから表示光Ｌが出射された場合と同じように作用する。表示光Ｌは、プリズム１４０を透過した後、凹面ミラー１２によりウインドシールド２０１に向けて反射させられる。表示光Ｌは、ウインドシールド２０１を反射して視認者１に到達する。これにより、仮想ディスプレイ平面１４８Ａ及び仮想ディスプレイ平面１４８Ｂの向きに対応して、複数の虚像Ｖ１，Ｖ２が互いに異なる向きで表示される。 Next, the operation of the head-up display device 100 will be explained.
When the display light L is emitted from the display surface 21, the display light L enters the prism 140. The prism 140 functions in the same way as when the display light L is emitted from the virtual display plane 148A and the virtual display plane 148B in mutually different directions. After the display light L passes through the prism 140, it is reflected by the concave mirror 12 toward the windshield 201. The display light L reflects off the windshield 201 and reaches the viewer 1. Thereby, the plurality of virtual images V1 and V2 are displayed in mutually different orientations, corresponding to the orientations of the virtual display plane 148A and the virtual display plane 148B.
　（効果）
　以上、説明した第１の実施形態によれば、以下の効果を奏する。
　（１－１）ヘッドアップディスプレイ装置１００は、表示光Ｌを出射する表示面２１を有する表示器２０と、表示面２１から出射された表示光Ｌが透過するプリズム１４０と、を備える。プリズム１４０は、表示面２１からの表示光Ｌを入射する入射面１４１ｉと、入射面１４１ｉからプリズム１４０に入射した表示光Ｌを出射する出射面１４１ｏと、を備える。出射面１４１ｏは、表示面２１に沿う方向に延びる第１天面１４２と、第１天面１４２に対して傾斜した傾斜面１４３と、を備える。
　この構成によれば、プリズム１４０の第１天面１４２及び傾斜面１４３により、１つの表示器２０で、向きの異なる２つの虚像Ｖ１，Ｖ２を表示可能である。よって、２つの表示器が不要であり、ヘッドアップディスプレイ装置１００の小型化を図ることができる。 (effect)
According to the first embodiment described above, the following effects are achieved.
(1-1) The head-up display device 100 includes a display device 20 having a display surface 21 that emits display light L, and a prism 140 that transmits the display light L emitted from the display surface 21. The prism 140 includes an entrance surface 141i through which the display light L from the display surface 21 is incident, and an exit surface 141o through which the display light L that has entered the prism 140 from the entrance surface 141i is output. The output surface 141o includes a first top surface 142 that extends in a direction along the display surface 21, and an inclined surface 143 that is inclined with respect to the first top surface 142.
According to this configuration, the first top surface 142 and the inclined surface 143 of the prism 140 allow one display 20 to display two virtual images V1 and V2 in different directions. Therefore, two displays are not required, and the head-up display device 100 can be made smaller.
　（１－２）表示面２１は、第１天面１４２を通過する表示光Ｌを出射する第１領域２０ａと、傾斜面１４３を通過する表示光Ｌを出射する第２領域２０ｂと、を備える。第１領域２０ａには文字情報が表示される。第２領域２０ｂには記号情報が表示される。
　この構成によれば、２つの虚像Ｖ１，Ｖ２の向きに適した情報を表示することができる。
　（２－１）ヘッドアップディスプレイ装置１００は、表示光Ｌを被投射部材の一例であるウインドシールド２０１に投射することにより第１虚像の一例である虚像Ｖ１及び第２虚像の一例である虚像Ｖ２を視認者１に視認可能に表示する。ヘッドアップディスプレイ装置１００は、虚像Ｖ１が表示される第１虚像表示仮想領域の一例である虚像表示仮想領域Ｋ１及び虚像Ｖ２が表示される第２虚像表示仮想領域の一例である虚像表示仮想領域Ｋ２が視認者１から見て左右方向（車幅方向）に並べられた状態で、虚像表示仮想領域Ｋ１を視認者１から見て高さ方向に沿って延びる向きに設定し、虚像表示仮想領域Ｋ２を虚像表示仮想領域Ｋ１に対して傾斜した向きに設定する虚像向き設定部の一例であるプリズム１４０を備える。
　この構成によれば、２つの虚像Ｖ１，Ｖ２を左右方向に並べつつ、２つの虚像Ｖ１，Ｖ２の向きを異ならせることより、虚像Ｖ１，Ｖ２の視認性を向上させることができる。 (1-2) The display surface 21 includes a first region 20a that emits the display light L that passes through the first top surface 142, and a second region 20b that emits the display light L that passes through the inclined surface 143. . Text information is displayed in the first area 20a. Symbol information is displayed in the second area 20b.
According to this configuration, information suitable for the orientations of the two virtual images V1 and V2 can be displayed.
(2-1) The head-up display device 100 projects the display light L onto the windshield 201, which is an example of a member to be projected, to create a virtual image V1, which is an example of a first virtual image, and a virtual image V2, which is an example of a second virtual image. is displayed so as to be visible to viewer 1. The head-up display device 100 includes a virtual image display virtual area K1, which is an example of a first virtual image display virtual area where the virtual image V1 is displayed, and a virtual image display virtual area K2, which is an example of the second virtual image display virtual area where the virtual image V2 is displayed. are arranged in the left-right direction (vehicle width direction) when viewed from the viewer 1, the virtual image display virtual area K1 is set to extend along the height direction when viewed from the viewer 1, and the virtual image display virtual area K2 A prism 140 is provided, which is an example of a virtual image orientation setting unit that sets the virtual image orientation to be inclined with respect to the virtual image display virtual region K1.
According to this configuration, the visibility of the virtual images V1 and V2 can be improved by arranging the two virtual images V1 and V2 in the left-right direction and making the directions of the two virtual images V1 and V2 different.
　（２－２）ヘッドアップディスプレイ装置１００は、表示光Ｌを出射する表示面２１を有する表示器２０を備える。プリズム１４０は、表示面２１から出射された表示光Ｌが透過する。プリズム１４０は、表示光Ｌを出射する面であり、表示光Ｌのうち虚像表示仮想領域Ｋ２に対応する領域に形成され、表示面２１に対して傾斜する傾斜面１４３を備える。
　この構成によれば、プリズム１４０を設けるだけで、簡単に、虚像表示仮想領域Ｋ２の向きを虚像表示仮想領域Ｋ１に対して交差させることができる。例えば、虚像表示仮想領域Ｋ２を寝かせつつ、虚像表示仮想領域Ｋ１を起こす構成が実現可能となる。 (2-2) The head-up display device 100 includes a display 20 having a display surface 21 that emits display light L. The display light L emitted from the display surface 21 passes through the prism 140 . The prism 140 is a surface that emits the display light L, and includes an inclined surface 143 that is formed in a region of the display light L that corresponds to the virtual image display virtual region K2 and is inclined with respect to the display surface 21.
According to this configuration, simply by providing the prism 140, the direction of the virtual image display virtual region K2 can be easily made to intersect with the virtual image display virtual region K1. For example, it is possible to realize a configuration in which the virtual image display virtual area K1 is raised while the virtual image display virtual area K2 is laid down.
　（２－３）虚像表示仮想領域Ｋ１には虚像Ｖ１として文字情報が表示される。虚像表示仮想領域Ｋ２には虚像Ｖ２として実風景に関連付けられた記号情報が表示される。
　この構成によれば、２つの虚像Ｖ１，Ｖ２の向きに適した情報を表示することができる。 (2-3) Virtual image display Character information is displayed as a virtual image V1 in the virtual area K1. In the virtual image display virtual area K2, symbolic information associated with the real scenery is displayed as the virtual image V2.
According to this configuration, information suitable for the orientations of the two virtual images V1 and V2 can be displayed.
　（２－４）ヘッドアップディスプレイ装置１００は、視認者１の視点ＥＰの位置情報を取得し、取得した位置情報に基づき視認者１の視点ＥＰがアイボックス（可視領域Ｒ）から右側に外れたと判断すると、虚像Ｖ１，Ｖ２のうち左側の虚像Ｖ１の表示を消し、取得した位置情報に基づき視認者１の視点ＥＰがアイボックスから左側に外れたと判断すると、虚像Ｖ１，Ｖ２のうち右側の虚像Ｖ２の表示を消す制御部２５を備える。
　この構成によれば、視認者１の視点ＥＰが可視領域Ｒから右側に外れたときに、本来、虚像表示仮想領域Ｋ１に表示される虚像Ｖ１が虚像表示仮想領域Ｋ２に表示されるように見えてしまうことが抑制される。また、視認者１の視点が可視領域Ｒから左側に外れたときに、本来、虚像表示仮想領域Ｋ２に表示される虚像Ｖ２が虚像表示仮想領域Ｋ１に表示されるように見えてしまうことが抑制される。よって、虚像Ｖ１，Ｖ２の視認性を高めることができる。 (2-4) The head-up display device 100 acquires the positional information of the viewpoint EP of the viewer 1, and determines that the viewpoint EP of the viewer 1 deviates from the eye box (visible region R) to the right based on the acquired positional information. When the judgment is made, the display of the left virtual image V1 of the virtual images V1 and V2 is erased, and when it is judged that the viewpoint EP of the viewer 1 has moved to the left from the eye box based on the acquired position information, the display of the right virtual image of the virtual images V1 and V2 is erased. It includes a control section 25 that turns off the display of V2.
According to this configuration, when the viewpoint EP of the viewer 1 deviates from the visible region R to the right, the virtual image V1 that is originally displayed in the virtual image display virtual region K1 appears to be displayed in the virtual image display virtual region K2. This prevents the occurrence of Furthermore, when the viewpoint of the viewer 1 deviates from the visible region R to the left side, it is suppressed that the virtual image V2, which is originally displayed in the virtual image display virtual region K2, appears to be displayed in the virtual image display virtual region K1. be done. Therefore, the visibility of the virtual images V1 and V2 can be improved.
　（２－５）ヘッドアップディスプレイ装置１００は車両２００に搭載される。路面に沿う虚像Ｖ２は、立面像である虚像Ｖ１よりも車両２００の中心線Ｃの近くに位置する。
　この構成によれば、虚像Ｖ１の表示が視認者１の道路状況の視認を妨げることが抑制される。 (2-5) The head-up display device 100 is mounted on the vehicle 200. The virtual image V2 along the road surface is located closer to the center line C of the vehicle 200 than the virtual image V1, which is an elevational image.
According to this configuration, the display of the virtual image V1 is suppressed from interfering with the viewer 1's visual recognition of the road condition.
　（第２の実施形態）
　本開示の第２の実施形態に係るヘッドアップディスプレイ装置について、図面を参照して説明する。本実施形態では、主に、プリズムの第１天面と傾斜面が高さ方向に並ぶように構成されている点が上記第１の実施形態と異なる。以下、上記第１の実施形態との相違点を中心に説明する。
　図８及び図９に示すように、プリズム４０及び表示器２０は、高さ方向に長い長方形板状をなす。プリズム４０は、表示面２１に対応して位置し、表示面２１からの表示光を入射する入射面４１ｉと、入射面４１ｉを介してプリズム４０に入射した表示光Ｌを出射する出射面４１ｏと、を備える。出射面４１ｏは、表示面２１と平行をなす第１天面４２と、第１天面４２に対して傾斜した傾斜面４３と、を備える。第１天面４２及び傾斜面４３は高さ方向に連続している。第１天面４２は、傾斜面４３よりも上方向に位置する。傾斜面４３は、下方に向かうにつれて表示器２０に近づくように傾斜している。
　なお、表示器２０及びプリズム４０は、幅方向に長い長方形板状をなしてもよい。 (Second embodiment)
A head-up display device according to a second embodiment of the present disclosure will be described with reference to the drawings. This embodiment differs from the first embodiment mainly in that the first top surface and the inclined surface of the prism are arranged in the height direction. Hereinafter, differences from the first embodiment will be mainly described.
As shown in FIGS. 8 and 9, the prism 40 and the display 20 have a rectangular plate shape that is long in the height direction. The prism 40 is located corresponding to the display surface 21, and has an entrance surface 41i into which the display light from the display surface 21 is incident, and an exit surface 41o through which the display light L that has entered the prism 40 via the entrance surface 41i is output. , is provided. The output surface 41o includes a first top surface 42 that is parallel to the display surface 21, and an inclined surface 43 that is inclined with respect to the first top surface 42. The first top surface 42 and the inclined surface 43 are continuous in the height direction. The first top surface 42 is located above the inclined surface 43. The inclined surface 43 is inclined so as to approach the display 20 as it goes downward.
Note that the display device 20 and the prism 40 may have a rectangular plate shape that is long in the width direction.
　図９に示すように、仮想ディスプレイ平面４８Ａは、第１天面４２と入射面４１ｉの間に位置する。仮想ディスプレイ平面４８Ｂは、傾斜面４３と入射面４１ｉの間に位置し、傾斜面４３と入射面４１ｉがなす角度αを、例えば、二等分する方向に延びる。表示光Ｌの光軸中心Ｌａは、仮想ディスプレイ平面４８Ａ及び仮想ディスプレイ平面４８Ｂの境界部を通過する。なお、表示光Ｌの光軸中心Ｌａは、境界部を通過せず、仮想ディスプレイ平面４８Ａ及び仮想ディスプレイ平面４８Ｂを通過してもよい。 As shown in FIG. 9, the virtual display plane 48A is located between the first top surface 42 and the entrance surface 41i. The virtual display plane 48B is located between the inclined surface 43 and the incident surface 41i, and extends in a direction that bisects the angle α formed by the inclined surface 43 and the incident surface 41i, for example. The optical axis center La of the display light L passes through the boundary between the virtual display plane 48A and the virtual display plane 48B. Note that the optical axis center La of the display light L may not pass through the boundary, but may pass through the virtual display plane 48A and the virtual display plane 48B.
　光軸中心Ｌａに対する仮想ディスプレイ平面４８Ａの延長線（図９の破線で示す線）の角度θ１は、光軸中心Ｌａに対する仮想ディスプレイ平面４８Ｂの角度θ２よりも小さい角度である。角度θ２（図９参照）が大きくなるほど、高さ方向に対する虚像表示仮想領域Ｋ２の傾斜角度が大きくなる。 The angle θ1 of the extension line (the broken line in FIG. 9) of the virtual display plane 48A with respect to the optical axis center La is smaller than the angle θ2 of the virtual display plane 48B with respect to the optical axis center La. The larger the angle θ2 (see FIG. 9), the larger the inclination angle of the virtual image display virtual region K2 with respect to the height direction.
　図７及び図９に示すように、仮想ディスプレイ平面４８Ａは高さ方向に沿う虚像表示仮想領域Ｋ１に対応する。仮想ディスプレイ平面４８Ｂは虚像表示仮想領域Ｋ１に対して傾斜する虚像表示仮想領域Ｋ２に対応する。仮想ディスプレイ平面４８Ａの上端は虚像表示仮想領域Ｋ１の下端に対応しており、仮想ディスプレイ平面４８Ｂの下端は虚像表示仮想領域Ｋ２の上端に対応している。すなわち、仮想ディスプレイ平面４８Ａ及び仮想ディスプレイ平面４８Ｂそれぞれの画像は、高さ方向及び車両前後方向に反転して虚像Ｖ１，Ｖ２として表示される。
　図７及び図１０に示すように、虚像表示仮想領域Ｋ２は、視認者１から見て、虚像表示仮想領域Ｋ１よりも上方に位置する。虚像表示仮想領域Ｋ１の上端は、虚像表示仮想領域Ｋ２の下端に接している。虚像表示仮想領域Ｋ２は、視認者１から離れるにつれて上方向に向かうように傾斜する。 As shown in FIGS. 7 and 9, the virtual display plane 48A corresponds to a virtual image display virtual area K1 along the height direction. Virtual display plane 48B corresponds to virtual image display virtual area K2 that is inclined with respect to virtual image display virtual area K1. The upper end of the virtual display plane 48A corresponds to the lower end of the virtual image display virtual region K1, and the lower end of the virtual display plane 48B corresponds to the upper end of the virtual image display virtual region K2. That is, the images of the virtual display plane 48A and the virtual display plane 48B are displayed as virtual images V1 and V2 by being reversed in the height direction and the vehicle longitudinal direction.
As shown in FIGS. 7 and 10, the virtual image display virtual region K2 is located above the virtual image display virtual region K1 when viewed from the viewer 1. The upper end of the virtual image display virtual area K1 is in contact with the lower end of the virtual image display virtual area K2. The virtual image display virtual area K2 slopes upward as it moves away from the viewer 1.
　（第３の実施形態）
　本開示の第３の実施形態に係るヘッドアップディスプレイ装置について、図面を参照して説明する。本実施形態では、プリズムに代えて、凹面鏡の曲率を変化させることにより虚像の向きを変化させる点が上記第１の実施形態と異なる。以下、上記第１の実施形態との相違点を中心に説明する。 (Third embodiment)
A head-up display device according to a third embodiment of the present disclosure will be described with reference to the drawings. This embodiment differs from the first embodiment in that the direction of the virtual image is changed by changing the curvature of a concave mirror instead of the prism. Hereinafter, differences from the first embodiment will be mainly described.
　図１１に示すように、凹面ミラー１２の反射面１２ａは、凹面ミラー１２の正面視で車幅方向（左右方向）に長い形状をなす。
　図１２に示すように、反射面１２ａの曲率は、車幅方向（反射面１２ａの長手方向）において、右側Ｒｄに向かうにつれて大きく、すなわち、右側Ｒｄに向かうにつれて徐々にカーブがきつくなるように形成されている。この曲率の変化により、凹面ミラー１２の平面視での厚さＨは、右側Ｒｄに向かうにつれて大きくなっている。 As shown in FIG. 11, the reflective surface 12a of the concave mirror 12 has a long shape in the vehicle width direction (horizontal direction) when the concave mirror 12 is viewed from the front.
As shown in FIG. 12, the curvature of the reflective surface 12a is formed so that in the vehicle width direction (longitudinal direction of the reflective surface 12a), the curve becomes larger toward the right side Rd, that is, the curve gradually becomes steeper toward the right side Rd. has been done. Due to this change in curvature, the thickness H of the concave mirror 12 in plan view increases toward the right side Rd.
　図１１に示すように、反射面１２ａの右側Ｒｄの領域１２Ｒは、表示光Ｌのうち虚像Ｖ２に対応する光を反射する。反射面１２ａの左側Ｌｄの領域１２Ｌは、表示光Ｌのうち虚像Ｖ１に対応する光を反射する。領域１２Ｒの曲率平均は、領域１２Ｌの曲率平均よりも大きい。反射面１２ａの曲率が大きくなるほど、虚像Ｖ１，Ｖ２のサイズの拡大倍率が高まる。よって、「領域１２Ｒの曲率平均＞領域１２Ｌの曲率平均」となることにより、図１３及び図１４に示すように、虚像表示仮想領域Ｋ２のサイズが虚像表示仮想領域Ｋ１のサイズよりも大きくなる。虚像表示仮想領域Ｋ１，Ｋ２のサイズが大きくなるにつれて、虚像表示仮想領域Ｋ１，Ｋ２の視認者に近い側の端部（下端部）と視認者から遠い側の端部（上端部）の光路差が大きくなり、高さ方向に対する虚像Ｖ１，Ｖ２の傾き角度β１，β２が大きくなる。従って、反射面１２ａの領域１２Ｒを経た表示光Ｌにより表示される虚像Ｖ２の傾き角度β２（図１４参照）は、反射面１２ａの領域１２Ｌを経た表示光Ｌにより表示される虚像Ｖ１の傾き角度β１（図１３参照）よりも大きくなる。 As shown in FIG. 11, the region 12R on the right side Rd of the reflective surface 12a reflects the light corresponding to the virtual image V2 of the display light L. The region 12L on the left side Ld of the reflective surface 12a reflects the light corresponding to the virtual image V1 of the display light L. The average curvature of the region 12R is larger than the average curvature of the region 12L. As the curvature of the reflective surface 12a increases, the magnification of the size of the virtual images V1 and V2 increases. Therefore, since "average curvature of region 12R>average curvature of region 12L", the size of virtual image display virtual region K2 becomes larger than the size of virtual image display virtual region K1, as shown in FIGS. 13 and 14. As the size of the virtual image display virtual regions K1, K2 increases, the optical path difference between the end (lower end) of the virtual image display virtual regions K1, K2 closer to the viewer and the end (upper end) farther from the viewer of the virtual image display virtual regions K1, K2 increases. becomes large, and the inclination angles β1, β2 of the virtual images V1, V2 with respect to the height direction become large. Therefore, the tilt angle β2 (see FIG. 14) of the virtual image V2 displayed by the display light L passing through the region 12R of the reflective surface 12a is the tilt angle β2 of the virtual image V1 displayed by the display light L passing through the region 12L of the reflective surface 12a. It becomes larger than β1 (see FIG. 13).
　図１５を参照しつつ、本実施形態での虚像Ｖ１，Ｖ２の傾きを示すシミュレーション結果を示す。
　図１５のグラフにおいて、縦軸Ｚは、車両の前後方向に対応しており、横軸Ｘは車幅方向に対応している。縦軸Ｚの数値は大きくなるほど、視認者１から離れた位置となる。そして、このグラフ内の各プロット点は、表示面２１に対応する虚像表示仮想領域Ｋ１，Ｋ２を横５×縦４のグリッドに分割したときの各グリッドの中心位置に対応している。 Referring to FIG. 15, simulation results showing the inclinations of the virtual images V1 and V2 in this embodiment will be shown.
In the graph of FIG. 15, the vertical axis Z corresponds to the longitudinal direction of the vehicle, and the horizontal axis X corresponds to the vehicle width direction. The larger the value on the vertical axis Z, the farther away the position is from the viewer 1. Each plot point in this graph corresponds to the center position of each grid when the virtual image display virtual regions K1 and K2 corresponding to the display surface 21 are divided into 5 horizontal by 4 vertical grids.
　グラフ線Ｌ１は、各プロット点のうち上から１番目に位置する第１列のプロット点を結んだ線である。グラフ線Ｌ２は、各プロット点のうち上から２番目に位置する第２列のプロット点を結んだ線である。グラフ線Ｌ３は、各プロット点のうち上から３番目に位置する第３列のプロット点を結んだ線である。グラフ線Ｌ４は、各プロット点のうち上から４番目に位置する第４列のプロット点を結んだ線である。グラフ線Ｌ５は、各プロット点のうち上から５番目に位置する第５列のプロット点を結んだ線である。 The graph line L1 is a line connecting the plot points in the first column located first from the top among the plot points. The graph line L2 is a line connecting the plot points in the second column located second from the top among the plot points. The graph line L3 is a line connecting the plot points in the third column located third from the top among the plot points. Graph line L4 is a line connecting plot points in the fourth column located fourth from the top among the plot points. Graph line L5 is a line connecting plot points in the fifth column located fifth from the top among the plot points.
　図１５に示すように、右側Ｒｄの虚像表示仮想領域Ｋ２及び虚像Ｖ２に対応するプロット点は、各グラフ線Ｌ１～Ｌ５間の距離が粗であり、虚像表示仮想領域Ｋ２が傾いていることがわかる。一方、左側Ｌｄの虚像表示仮想領域Ｋ１及び虚像Ｖ１に対応するプロット点は、各グラフ線Ｌ１～Ｌ５間の距離が密であり、虚像表示仮想領域Ｋ１の傾きが小さいことがわかる。また、２つの虚像表示仮想領域Ｋ１，Ｋ２の間では徐々に傾き角度が変化していることがわかる。 As shown in FIG. 15, the plot points corresponding to the virtual image display virtual region K2 and the virtual image V2 on the right side Rd have rough distances between each graph line L1 to L5, and it is clear that the virtual image display virtual region K2 is tilted. Recognize. On the other hand, it can be seen that for the plot points corresponding to the virtual image display virtual region K1 and the virtual image V1 on the left side Ld, the distances between the graph lines L1 to L5 are close, and the slope of the virtual image display virtual region K1 is small. It can also be seen that the inclination angle gradually changes between the two virtual image display virtual regions K1 and K2.
　なお、本開示は以上の実施形態及び図面によって限定されるものではない。本開示の要旨を変更しない範囲で、適宜、変更（構成要素の削除も含む）を加えることが可能である。以下に、変形の一例を説明する。 Note that the present disclosure is not limited to the above embodiments and drawings. It is possible to make changes (including deletion of components) as appropriate without changing the gist of the present disclosure. An example of the modification will be described below.
　（変形例）
　上記第１の実施形態において、プリズム１４０のうち第１天面１４２を含む矩形厚板状の部位が省略されてもよい。この場合、プリズム１４０は、傾斜面１４３を含む三角柱状で形成され、表示面２１の第２領域２０ｂのみに設けられてもよい。上記第２の実施形態もこれと同様であり、プリズム４０のうち第１天面４２を含む矩形厚板状の部位が省略されてもよい。 (Modified example)
In the first embodiment, the rectangular thick plate-shaped portion of the prism 140 including the first top surface 142 may be omitted. In this case, the prism 140 may be formed in a triangular prism shape including an inclined surface 143, and may be provided only in the second region 20b of the display surface 21. The second embodiment is similar to this, and the rectangular thick plate-shaped portion of the prism 40 including the first top surface 42 may be omitted.
　上記各実施形態では、表示面２１から凹面ミラー１２に表示光Ｌが直接照射されていたが、これに限らず、表示面２１から照射された表示光Ｌを凹面ミラー１２に向けて反射する補正鏡が新たに設けられていてもよい。この補正鏡は、例えば、縦断面が凹状の凹面鏡である。この補正鏡と凹面ミラー１２により、表示面２１から表示光Ｌをウインドシールド２０１に導く光学リレーが構成されてもよい。 In each of the above embodiments, the display light L is directly irradiated from the display surface 21 to the concave mirror 12; however, the present invention is not limited to this, and correction is performed to reflect the display light L irradiated from the display surface 21 toward the concave mirror 12. A mirror may be newly provided. This correction mirror is, for example, a concave mirror with a concave longitudinal section. This correction mirror and the concave mirror 12 may constitute an optical relay that guides the display light L from the display surface 21 to the windshield 201.
　上記各実施形態において、凹面ミラー１２は、車幅方向に沿って延びる回転軸を中心に回動可能に構成されてもよい。凹面ミラー１２がこの回転軸を中心に回転することにより、視認者１に対して表示光Ｌが投射される高さが調整される。 In each of the above embodiments, the concave mirror 12 may be configured to be rotatable about a rotation axis extending along the vehicle width direction. By rotating the concave mirror 12 around this rotation axis, the height at which the display light L is projected onto the viewer 1 is adjusted.
　上記第１の実施形態において、表示面２１のうち仮想ディスプレイ平面４８Ａ，４８Ｂの境界部分に対応する非表示領域２１ａ（図９参照）からは表示光Ｌが出射されない構成としてもよい。これにより、視認者の視点を可視領域内で移動させたときに、表示が虚像Ｖ１，Ｖ２を行き来することが抑制され、視認者に与える違和感を低減できる。なお、この変形例に限らず、遮光部材等の遮光手段を用いて、仮想ディスプレイ平面４８Ａ，４８Ｂの境界部分に表示光Ｌが到達しないように構成されてもよい。上記第２の実施形態又は第３の実施形態においても、同様に、非表示領域２１ａ又は遮光手段が採用されてもよい。 In the first embodiment, the display light L may not be emitted from the non-display area 21a (see FIG. 9) of the display surface 21 that corresponds to the boundary between the virtual display planes 48A and 48B. Thereby, when the viewer's viewpoint is moved within the visible region, the display is suppressed from going back and forth between the virtual images V1 and V2, and the sense of discomfort given to the viewer can be reduced. Note that the display light L is not limited to this modification, and may be configured to use a light shielding means such as a light shielding member so that the display light L does not reach the boundary between the virtual display planes 48A and 48B. In the second embodiment or the third embodiment, the non-display area 21a or the light shielding means may be similarly employed.
　上記各実施形態におけるプリズム４０，１４０は適宜変更可能である。図１６～図２０を参照しつつ、プリズムの形状及び虚像の配置の変形例について説明する。 The prisms 40 and 140 in each of the above embodiments can be changed as appropriate. Modifications of the shape of the prism and the arrangement of the virtual images will be described with reference to FIGS. 16 to 20.
　例えば、図１６に示す変形例では、プリズム２４０の出射面２４１ｏは、表示面２１と平行をなす第１天面２４２と、第１天面２４２に対して傾斜した傾斜面２４３と、を備える。傾斜面２４３は、第１天面２４２から高さ方向に離れるにつれて表示面２１から遠ざかるように傾斜する。傾斜面２４３は、第１天面２４２の上方に位置する。仮想ディスプレイ平面２４８Ａは、第１天面２４２と入射面２４１ｉの中心に形成される。仮想ディスプレイ平面２４８Ｂは、傾斜面２４３と入射面２４１ｉの中心に形成される。この変形例では、虚像表示仮想領域Ｋ２は、虚像表示仮想領域Ｋ１の下方向に位置し、高さ方向に沿う虚像表示仮想領域Ｋ１の下端が路面に沿う虚像表示仮想領域Ｋ２の上端に対応して位置する。これにより、路面に沿う虚像Ｖ２を視認者１に近い位置に表示できる。 For example, in the modification shown in FIG. 16, the output surface 241o of the prism 240 includes a first top surface 242 parallel to the display surface 21 and an inclined surface 243 inclined with respect to the first top surface 242. The slope 243 slopes away from the display surface 21 as it moves away from the first top surface 242 in the height direction. The inclined surface 243 is located above the first top surface 242. The virtual display plane 248A is formed at the center of the first top surface 242 and the entrance surface 241i. A virtual display plane 248B is formed at the center of the inclined surface 243 and the incident surface 241i. In this modification, the virtual image display area K2 is located below the virtual image display area K1, and the lower end of the virtual image display area K1 along the height direction corresponds to the upper end of the virtual image display virtual area K2 along the road surface. located. Thereby, the virtual image V2 along the road surface can be displayed at a position close to the viewer 1.
　例えば、図１７に示す変形例では、図１６に示す変形例の構成に加えて、プリズム２４０Ａの出射面２４１ｏは、表示面２１と平行をなす第２天面２４４を備える。第２天面２４４は、第１天面２４２よりも表示面２１からの距離が遠い位置に形成されている。第２天面２４４は、高さ方向において、傾斜面２４３の第１天面２４２と反対側に位置する。傾斜面２４３は、第１天面２４２及び第２天面２４４の間を繋ぐように形成されている。プリズム２４０Ａの第２天面２４４に対応する部位の厚さは、プリズム２４０Ａの第１天面２４２に対応する部位の厚さよりも大きく形成される。仮想ディスプレイ平面２４８Ｃは、第２天面２４４と入射面２４１ｉの中心に形成される。この変形例では、図１８に示すように、図１６と同様の虚像Ｖ１，Ｖ２に加えて、表示光Ｌのうち第２天面２４４を通過する光により、虚像表示仮想領域Ｋ３に虚像Ｖ３が表示される。虚像表示仮想領域Ｋ３は、虚像表示仮想領域Ｋ２の下端から下方向に延びる。この変形例によれば、１つの表示器２０で、向きの異なる３つの虚像Ｖ１，Ｖ２，Ｖ３を表示可能である。 For example, in the modification shown in FIG. 17, in addition to the configuration of the modification shown in FIG. The second top surface 244 is formed at a position farther from the display surface 21 than the first top surface 242. The second top surface 244 is located on the opposite side of the inclined surface 243 from the first top surface 242 in the height direction. The inclined surface 243 is formed to connect the first top surface 242 and the second top surface 244. The thickness of the portion of the prism 240A corresponding to the second top surface 244 is formed to be larger than the thickness of the portion of the prism 240A corresponding to the first top surface 242. The virtual display plane 248C is formed at the center of the second top surface 244 and the entrance surface 241i. In this modification, as shown in FIG. 18, in addition to the virtual images V1 and V2 similar to that shown in FIG. Is displayed. The virtual image display virtual area K3 extends downward from the lower end of the virtual image display virtual area K2. According to this modification, one display 20 can display three virtual images V1, V2, and V3 in different directions.
　例えば、図１９に示す変形例では、プリズム４４０の出射面４４１ｏは、傾斜曲面４４３と、曲天面４４２と、を備える。曲天面４４２は、高さ方向に沿って凸状に膨らむように形成される。傾斜曲面４４３は、高さ方向に沿って凹状にへこむように形成される。曲天面４４２の曲率は、傾斜曲面４４３の曲率よりも大きく形成されている。曲天面４４２の曲率は、傾斜曲面４４３に近づくにつれて徐々に小さくなり、傾斜曲面４４３の曲率は、曲天面４４２に近づくにつれて徐々に小さくなる。これにより、曲天面４４２及び傾斜曲面４４３は滑らかに連結される。仮想ディスプレイ平面４４８Ａは、曲天面４４２と入射面４１ｉの間に曲天面４４２に応じた曲面状に形成される。仮想ディスプレイ平面４４８Ｂは、傾斜曲面４４３と入射面４１ｉの間に傾斜曲面４４３に応じた曲面状に形成される。この変形例によれば、虚像表示仮想領域Ｋ１，Ｋ２間の角が丸くなり、虚像表示仮想領域Ｋ１，Ｋ２が滑らかに連続するように接続される。
　また、上記第１の実施形態においては、図３に示すように、傾斜面１４３及び第１天面１４２の高さ方向（図３の上下方向）の長さは同じであったが、これに限らず、これら長さは異なっていてもよい。例えば、図２０に示す変形例のプリズム５４０においては、傾斜面５４３の高さ方向の長さは、第１天面５４２の高さ方向の長さよりも小さい。そして、傾斜面５４３は、高さ方向において第１天面５４２に挟み込まれるように構成される。すなわち、図２０に示す変形例では、傾斜面５４３は、３方向（本例では、上下右の３方向）から第１天面５４２により囲まれて構成される。なお、この図２０に示す変形例に限らず、傾斜面５４３は、出射面５４１ｏの上側角部又は下側角部を含むように位置し、２方向（例えば、上右の２方向、又は下右の２方向）から第１天面５４２により囲まれた構成であってもよい。これにより、虚像表示仮想領域Ｋ１内の一部を虚像表示仮想領域Ｋ２とすることができ、多様な虚像Ｖ１，Ｖ２の表示態様が実現できる。なお、傾斜面５４３と第１天面５４２を逆の範囲に設定してもよい。 For example, in the modification shown in FIG. 19, the exit surface 441o of the prism 440 includes an inclined curved surface 443 and a curved top surface 442. The curved top surface 442 is formed to bulge out in a convex shape along the height direction. The inclined curved surface 443 is formed in a concave shape along the height direction. The curvature of the curved top surface 442 is larger than the curvature of the inclined curved surface 443. The curvature of the curved top surface 442 gradually decreases as it approaches the inclined curved surface 443, and the curvature of the inclined curved surface 443 gradually decreases as it approaches the curved top surface 442. Thereby, the curved top surface 442 and the inclined curved surface 443 are smoothly connected. The virtual display plane 448A is formed in a curved shape corresponding to the curved top surface 442 between the curved top surface 442 and the entrance surface 41i. The virtual display plane 448B is formed in a curved shape corresponding to the inclined curved surface 443 between the inclined curved surface 443 and the entrance surface 41i. According to this modification, the corners between the virtual image display virtual regions K1 and K2 are rounded, and the virtual image display virtual regions K1 and K2 are connected so as to be smoothly continuous.
Further, in the first embodiment, as shown in FIG. 3, the lengths of the inclined surface 143 and the first top surface 142 in the height direction (vertical direction in FIG. 3) are the same; However, these lengths may be different. For example, in the modified prism 540 shown in FIG. 20, the length of the inclined surface 543 in the height direction is smaller than the length of the first top surface 542 in the height direction. The inclined surface 543 is configured to be sandwiched between the first top surface 542 in the height direction. That is, in the modified example shown in FIG. 20, the inclined surface 543 is surrounded by the first top surface 542 from three directions (in this example, the top, bottom, and right directions). Note that the slope surface 543 is not limited to the modification shown in FIG. It may be surrounded by the first top surface 542 from the right two directions). Thereby, a part of the virtual image display virtual area K1 can be made into the virtual image display virtual area K2, and various display modes of the virtual images V1 and V2 can be realized. Note that the inclined surface 543 and the first top surface 542 may be set in opposite ranges.
　上記プリズム４０，１４０，２４０，２４０Ａ，４４０は、ウレキサイト、すなわち、テレビ石で形成されていてもよい。これにより、プリズム４０，１４０，２４０，２４０Ａ，４４０の光出射面に、仮想ディスプレイ平面を形成可能となる。 The prisms 40, 140, 240, 240A, and 440 may be formed of ulexite, that is, television stone. This makes it possible to form a virtual display plane on the light exit surfaces of the prisms 40, 140, 240, 240A, and 440.
　プリズム４０Ａは、図９の一点鎖線で示すように、表示面２１からはみ出すはみ出し部４９を備えていてもよい。はみ出し部４９は、表示光Ｌのうち表示面２１から凹面ミラー１２の反射面１２ａ（図７参照）の上端部へ向かう光が透過する。はみ出し部４９は、上記第２の実施形態のプリズム４０の上側面に設けられ、表示面２１から出射面４１ｏに近づくにつれて高さが高くなるように形成されている。これにより、凹面ミラー１２の反射面１２ａの全域を有効に利用でき、虚像表示仮想領域Ｋ１のサイズを大きくすることができる。
　また、上記各プリズム４０，４０Ａ，１４０，２４０，２４０Ａ，４４０の天面と傾斜面の間のエッジ部分には丸みを付けてもよい。
　上記各プリズム４０，４０Ａ，１４０，２４０，２４０Ａ，４４０の天面部分と傾斜面部分は別体で形成されてもよい。
　また、上記第３の実施形態の反射面１２ａの曲率を変化させる構成に、プリズムを組み合わせてもよい。これにより、虚像表示仮想領域Ｋ２をより大きく傾かせることができる。 The prism 40A may include a protruding portion 49 protruding from the display surface 21, as shown by the dashed line in FIG. The protruding portion 49 transmits light from the display surface 21 toward the upper end of the reflective surface 12a (see FIG. 7) of the concave mirror 12, out of the display light L. The protruding portion 49 is provided on the upper side surface of the prism 40 of the second embodiment, and is formed to increase in height as it approaches the output surface 41o from the display surface 21. Thereby, the entire area of the reflective surface 12a of the concave mirror 12 can be used effectively, and the size of the virtual image display virtual area K1 can be increased.
Further, the edge portion between the top surface and the inclined surface of each of the prisms 40, 40A, 140, 240, 240A, and 440 may be rounded.
The top surface portion and the inclined surface portion of each of the prisms 40, 40A, 140, 240, 240A, and 440 may be formed separately.
Further, a prism may be combined with the configuration of changing the curvature of the reflective surface 12a of the third embodiment. Thereby, the virtual image display virtual area K2 can be tilted more greatly.
　上記第３の実施形態においては、反射面１２ａの曲率は、右側Ｒｄに向かうにつれて徐々に大きくなるように形成されていたが、これに限らず、反射面１２ａの２つの領域１２Ｌ，１２Ｒそれぞれで異なる一定の曲率が設定されてもよい。 In the third embodiment, the curvature of the reflective surface 12a is formed to gradually increase toward the right side Rd, but the curvature is not limited to this, and each of the two regions 12L and 12R of the reflective surface 12a Different constant curvatures may be set.
　上記各実施形態においては、ヘッドアップディスプレイ装置１００が車載されていたが、これに限らず、飛行機、船等の乗り物に搭載されてもよい。また、被投射部材はウインドシールド２０１に限られず、専用のコンバイナであってもよい。
　また、表示光Ｌは、ミラーやレンズの収斂作用によって光路内でクロスされてもよい。この場合であっても、所望の虚像の形態に対応して、適宜プリズムや表示器が構成されると本発明の効果が発揮される。
　例えば、表示光Ｌが光路内において上下方向へ１回クロスする場合、クロスされない場合と比較して、プリズムや表示器は上下反転して設けられるとよい。 In each of the embodiments described above, the head-up display device 100 is mounted on a vehicle, but the head-up display device 100 is not limited to this, and may be mounted on a vehicle such as an airplane or a ship. Moreover, the projected member is not limited to the windshield 201, but may be a dedicated combiner.
Furthermore, the display light L may be crossed within the optical path by the convergence effect of a mirror or lens. Even in this case, the effects of the present invention can be exerted if the prism and display are configured as appropriate in accordance with the form of the desired virtual image.
For example, when the display light L crosses once in the vertical direction within the optical path, the prism and the display may be provided upside down compared to when the display light L does not cross.
１　視認者１２　凹面ミラー１２Ｌ，１２Ｒ　領域１２ａ　反射面２０　表示器２０ａ　第１領域２０ｂ　第２領域２１　表示面２１ａ　非表示領域２５　制御部３０　ケース３１　窓部４０，４０Ａ，１４０，２４０，２４０Ａ，４４０，５４０　プリズム４１ｉ，１４１ｉ，２４１ｉ　入射面４１ｏ，１４１ｏ，２４１ｏ，４４１ｏ，５４１ｏ　出射面４２，１４２，２４２，５４２　第１天面４４２　曲天面４３，１４３，２４３，５４３　傾斜面２４４　第２天面４４３　傾斜曲面４８Ａ，４８Ｂ，１４８Ａ，１４８Ｂ，２４８Ａ，２４８Ｂ，２４８Ｃ，４４８Ａ，４４８Ｂ　仮想ディスプレイ平面４９　はみ出し部１００　ヘッドアップディスプレイ装置２００　車両２０１　ウインドシールド２０５　視点検出部α，θ１，θ２，β１，β２　角度Ｃ　中心線Ｌ　表示光Ｋ１，Ｋ２，Ｋ３　虚像表示仮想領域Ｌ１～Ｌ５　グラフ線Ｒ　可視領域Ｖ１，Ｖ２，Ｖ３　虚像Ｘ　横軸Ｚ　縦軸ＥＰ　視点Ｌａ　光軸中心Ｌｄ　左側Ｒｄ　右側 1 Viewer 12 Concave mirror 12L, 12R Area 12a Reflective surface 20 Display 20a First area 20b Second area 21 Display surface 21a Non-display area 25 Control section 30 Case 31 Window section 40, 40A, 140, 240, 240A, 440 , 540 Prism 41i, 141i, 241i Incident surface 41o, 141o, 241o, 441o, 541o Output surface 42, 142, 242, 542 First top surface 442 Curved top surface 43, 143, 243, 543 Inclined surface 244 Second top surface 443 Inclined curved surface 48A, 48B, 148A, 148B, 248A, 248B, 248C, 448A, 448B Virtual display plane 49 Extrusion part 100 Head-up display device 200 Vehicle 201 Windshield 205 Viewpoint detection part α, θ1, θ2, β1, β2 Angle C Center line L Display light K1, K2, K3 Virtual image display virtual area L1 to L5 Graph line R Visible area V1, V2, V3 Virtual image X Horizontal axis Z Vertical axis EP Viewpoint La Optical axis center Ld Left side Rd Right side

Claims (4)

  1. 　表示光を出射する表示面を有する表示器と、
    　前記表示面から出射された前記表示光が透過するプリズムと、を備え、
    　前記プリズムは、
    　前記表示面からの前記表示光を入射する入射面と、
    　前記入射面から前記プリズムに入射した前記表示光を出射する出射面と、を備え、
    　前記出射面は、
    　前記表示面に沿う方向に延びる第１天面と、
    　前記第１天面に対して傾斜した傾斜面と、を備える、
    　ヘッドアップディスプレイ装置。     a display device having a display surface that emits display light;
    a prism through which the display light emitted from the display surface is transmitted;
    The prism is
    an entrance surface into which the display light from the display surface is incident;
    an output surface that outputs the display light that has entered the prism from the input surface,
    The exit surface is
    a first top surface extending in a direction along the display surface;
    an inclined surface inclined with respect to the first top surface;
    Head-up display device.
  2. 　前記プリズムは、前記表示面と平行をなし、前記第１天面とは前記入射面に対する高さが異なる第２天面を備え、
    　前記傾斜面は、前記第１天面と前記第２天面の間を繋ぐように形成されている、
    　請求項１に記載のヘッドアップディスプレイ装置。     The prism includes a second top surface that is parallel to the display surface and has a different height from the first top surface with respect to the incident surface,
    The inclined surface is formed to connect the first top surface and the second top surface.
    The head-up display device according to claim 1.
  3. 　前記表示面は、
    　前記第１天面を通過する前記表示光を出射する第１領域と、
    　前記傾斜面を通過する前記表示光を出射する第２領域と、を備え、
    　前記第１領域には文字情報が表示され、
    　前記第２領域には記号情報が表示される、
    　請求項１又は２に記載のヘッドアップディスプレイ装置。     The display surface is
    a first region that emits the display light passing through the first top surface;
    a second region that emits the display light passing through the inclined surface;
    Text information is displayed in the first area,
    symbolic information is displayed in the second area;
    A head-up display device according to claim 1 or 2.
  4. 　前記第１天面と前記プリズムの前記入射面の間には第１仮想ディスプレイ平面が形成され、
    　前記傾斜面と前記プリズムの前記入射面の間には第２仮想ディスプレイ平面が形成され、
    　前記表示面は、前記第１仮想ディスプレイ平面と前記第２仮想ディスプレイ平面の境界部に対応する領域を非表示とする非表示領域を備える、
    　請求項１又は２に記載のヘッドアップディスプレイ装置。     a first virtual display plane is formed between the first top surface and the incident surface of the prism;
    a second virtual display plane is formed between the inclined surface and the entrance surface of the prism;
    The display surface includes a non-display area that hides an area corresponding to a boundary between the first virtual display plane and the second virtual display plane.
    A head-up display device according to claim 1 or 2.
PCT/JP2023/015410 2022-04-22 2023-04-18 Head-up display device WO2023204198A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013214008A (en) * 2012-04-04 2013-10-17 Mitsubishi Electric Corp Display device and head-up display system including the same
JP2014164066A (en) * 2013-02-25 2014-09-08 Denso Corp Head-up display device
JP2019174582A (en) * 2018-03-28 2019-10-10 日本精機株式会社 Display device
US20200026075A1 (en) * 2017-02-23 2020-01-23 Lg Electronics Inc. Head up display for vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013214008A (en) * 2012-04-04 2013-10-17 Mitsubishi Electric Corp Display device and head-up display system including the same
JP2014164066A (en) * 2013-02-25 2014-09-08 Denso Corp Head-up display device
US20200026075A1 (en) * 2017-02-23 2020-01-23 Lg Electronics Inc. Head up display for vehicle
JP2019174582A (en) * 2018-03-28 2019-10-10 日本精機株式会社 Display device

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