JP7726082B2 - display device - Google Patents

Description

The disclosure in this specification relates to a display device that is visible to multiple occupants.

Patent Document 1 discloses a display device that displays a virtual image visible to the occupants by reflecting the display light of multiple displays with a reflector. The multiple displays are fixed to the back surface of a meter hood that covers the upper part of the reflector, and are arranged along the extension direction of the meter hood. The virtual image displayed by such a display device can be seen not only by the driver, but also by a passenger sitting in the front passenger seat, for example.

Japanese Patent Application Laid-Open No. 2021-76713

With the display device of Patent Document 1, if the driver's or passenger's eye point is low, the image displayed on the display may be visible. To prevent this, it is conceivable to provide a shielding section that hides the display on the back of the meter hood. However, if the shielding section that prevents the display from being seen by both the driver and passenger is provided at a certain height, there is a risk that it may interfere with the visibility of the virtual image displayed by the reflector.

The purpose of this disclosure is to provide a display device that can conceal the display while not interfering with the visibility of a virtual image for multiple occupants.

In order to achieve the above object, one disclosed aspect is a display device that displays a virtual image (Vi) visible to multiple occupants of a moving body (A), and includes at least one display (20) that displays a display image (Di) formed as a virtual image on a display surface (21), at least one reflective optical element (30) having a reflective surface (31) that reflects light of the display image toward the occupants and that forms a display area (DA) extending along a width direction (WD) of the moving body with the reflective surface, a hood (40) that is formed in a plate shape and that covers the reflective surface above the reflective optical element (Ue), and that holds the display with a back surface (41) that is located on the reflective optical element side, and a shielding portion (50) that protrudes downward (Si) from a tip portion (43) of the hood that is located closer to the occupants than the display and that hides the display held on the back surface, and In the case of an iris (EL1) where the eye point (EP1) of a passenger (Pg) other than the driver who is seated in the front passenger seat is assumed to be located, a virtual line connecting the lowest point (LEP1) of the iris, which uses a 90th percentile iris, to the rear edge (BEd) of the display surface that is farthest from the shielding portion is defined as a first virtual line (VL1); in the case of an iris (EL2) where the eye point (EP2) of a passenger (Pg) who is a passenger other than the driver and who is seated in the front passenger seat is assumed to be located, a virtual line connecting the lowest point (LEP2) of the iris, which uses the same 90th percentile iris as the driver's iris, to the rear edge is defined as a second virtual line (VL2); the protruding height (h) from the tip of the shielding portion is determined based on the one of the first and second virtual lines that is located lower, and the display device varies in the width direction so that both the first and second virtual lines intersect with the shielding portion.

In this configuration, both the first and second virtual lines connecting the lowest point of each iris and the rear edge of the display surface intersect with the shielding portion, making it difficult for the driver and passengers to see the rear side of the display surface even when the eye point is lowered. In addition, by using the lower of the first and second virtual lines as the reference, the protruding height of the shielding portion can be appropriately controlled. As a result, it is possible to make the display invisible to multiple occupants without interfering with their ability to view the virtual image.

One disclosed aspect is a display device that displays a virtual image (Vi) visible to multiple occupants of a moving body (A), comprising at least one display (20) that displays a display image (Di) formed as a virtual image on a display surface (21), at least one reflective optical element (30) having a reflective surface (31) that reflects light of the display image toward the occupants and that forms a display area (DA) extending along the width direction (WD) of the moving body with the reflective surface, a hood (40) that is formed in a plate shape and covers the reflective surface above the reflective optical element (Ue) and holds the display with a back surface (41) that is located on the reflective optical element side, and an iris (EL) where the eye point (EP1) of the driver (Dv) is assumed to be located. 1) , the first virtual line (VL1) is the virtual line connecting the lowest point (LEP1) of an iris that uses a 90th percentile iris and the rear edge (BEd) of the display surface that is farthest from the tip edge (44) of the hood, and the second virtual line (VL2) is the virtual line connecting the lowest point (LEP2) of an iris (EL2) that uses the same 90th percentile iris as the driver's iris and the rear edge, where the eye point (EP2) of a passenger (Pg) who is a passenger other than the driver and sits in the passenger seat is assumed to be located.The display is a display device that is held on the hood with the display surface aligned along one of the first and second virtual lines that is located lower (Si).

In this configuration, the display is held on the hood with the display surface aligned with the lower of the first and second virtual lines, making it difficult for the driver and passengers to see the area behind the display surface even if their eye points are lowered. Furthermore, since no shielding portion is required, the virtual image is easily visible. As a result, it is possible to make the display invisible to multiple occupants without interfering with their ability to see the virtual image.

Note that the reference numbers in parentheses above and in the claims merely indicate an example of the correspondence with the specific configurations in the embodiments described below, and do not in any way limit the technical scope.

1 is a diagram illustrating an outline of a mechanical configuration of a display device according to a first embodiment of the present disclosure and a mechanism for displaying a virtual image in a display area. FIG. 2 is a diagram showing the overall configuration of the display device as seen from the driver's perspective. FIG. 2 is a plan view showing the positional relationship between the driver and passenger and each component of the display device. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 4 is a cross-sectional view taken along line VV in FIG. 3. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 7 is a view of the shielding portion as viewed in the direction of arrow VII in FIG. 3, illustrating the detailed shape of the central region of the shielding portion. FIG. 10A and 10B are diagrams for explaining the detailed shape of an end region of a shielding portion. FIG. 10 is a block diagram showing the electrical configuration of a display device according to a second embodiment. 10A and 10B are diagrams for explaining brightness control when the eye point is below the iris. 10A and 10B are diagrams for explaining display control when the eye point is off below the iris in the display device according to the third embodiment. 10A and 10B are diagrams for explaining display control when the eye point moves to the upper part of the iris. FIG. 10 is a block diagram showing the electrical configuration of a display device according to a fourth embodiment. 10A and 10B are diagrams for explaining the operation of the extrusion mechanism. FIG. 11 is a block diagram showing the electrical configuration of a display device according to a fifth embodiment. FIG. 10 is a diagram illustrating the operation of the light control film. FIG. 10 is a diagram showing the state of the light control film in private view mode. FIG. 10 is a cross-sectional view showing the configuration of a display device according to a sixth embodiment. 10A and 10B are diagrams showing detailed shapes of end regions of a shielding portion according to Modification 1. 10 is a diagram showing a cross-sectional shape of a central portion of a shielding portion according to Modification 2. FIG. 13A and 13B are diagrams showing the cross-sectional shape of a shielding portion according to Modification 3. 13 is a diagram showing a cross-sectional shape of a shielding portion according to a fourth modified example. FIG. 13 is a diagram showing a cross-sectional shape of a shielding portion according to Modification 5. FIG. 13 is a diagram showing a cross-sectional shape of a shielding portion according to a sixth modified example. FIG. FIG. 13 is a diagram showing a cross-sectional shape of a shielding portion according to Modification 7.

Below, several embodiments will be described based on the drawings. Note that corresponding components in each embodiment will be given the same reference numerals, and duplicate explanations may be omitted. When only a portion of the configuration is described in each embodiment, the configuration of another previously described embodiment can be applied to the remaining portions of that configuration. Furthermore, in addition to the combinations of configurations explicitly stated in the description of each embodiment, configurations of several embodiments can also be partially combined together even if not explicitly stated, as long as there are no particular problems with the combination.

(First embodiment)
A display device 100 according to a first embodiment of the present disclosure shown in FIGS. 1 and 2 is mounted on a vehicle (hereinafter, referred to as host vehicle A) as a moving body. The host vehicle A in the first embodiment is a left-hand drive vehicle in which the steering wheel is disposed on the left side of the traveling direction in the width direction WD. In the host vehicle A, a driver's seat in which a driver Dv is seated is disposed to the left of the center in the width direction WD with respect to the traveling direction. Meanwhile, a passenger seat in which a passenger (hereinafter, referred to as a passenger Pg) other than the driver Dv is seated is disposed to the right of the center in the width direction WD with respect to the traveling direction.

In the following description, the front-rear, left-right, and up-down directions are defined with respect to the host vehicle A, which is stationary on a horizontal plane. Specifically, the front-rear direction (forward Ze and rearward Go) is defined along the longitudinal direction (direction of travel) of the host vehicle A. The left-right direction (width direction WD) is defined as a direction along the horizontal plane and perpendicular to the front-rear direction. Furthermore, the up-down direction (upward Ue and downward Si) is defined as a direction perpendicular to the horizontal plane.

The display device 100 is installed integrally with the instrument panel 10, in front of the driver Dv and passenger Pg Ze. The display device 100 has a horizontally elongated display area DA that displays information to multiple occupants, including the driver Dv and passenger Pg. The display device 100 forms a pillar-to-pillar display area DA that extends in the width direction WD, for example, from the base of the left A-pillar to the base of the right A-pillar. The display area DA may be continuous in the width direction WD, or may be divided into multiple areas.

The display area DA displays a virtual image Vi that is visible to the driver Dv and passenger Pg. The virtual image Vi is actually formed further back than the display area DA when viewed from the driver Dv and passenger Pg. By displaying the virtual image Vi further back than the display area DA, it is possible to reduce the burden of adjusting the focal length when the viewpoint moves from the front to the display area DA, and to prevent a decrease in visibility of the display due to external light.

The display device 100 comprises multiple displays 20, reflectors 30, a hood 40, and a shielding portion 50.

The display 20 is a self-luminous display device, such as an organic EL (Electro Luminescence) display. The display 20 displays various images (hereinafter, display image Di) on the display surface 21 by emitting light from a large number of pixels arranged two-dimensionally along the display surface 21. The display surface 21 may be flat or slightly curved. The display 20 emits light of the display image Di, which is formed as a virtual image Vi, from the display surface 21 and causes it to enter the reflecting mirror 30.

The multiple displays 20 are horizontally long and rectangular. Each display 20 is arranged in the width direction WD of the vehicle A with the display surface 21 tilted slightly (for example, around 10 degrees) relative to the horizontal plane. Each display surface 21 is tilted upward Ue as it extends rearward Go. The angle of inclination of each display surface 21 relative to the horizontal plane does not have to be constant, and may change continuously or in steps in the width direction WD. As an example, the angle of inclination of the display surface 21 relative to the horizontal plane is largest for the display 20 located in the center of the width direction WD, and decreases toward both ends of the width direction WD.

The reflector 30 is a reflective optical element formed by forming a reflective surface 31 by vapor deposition of aluminum or the like on the surface of a substrate such as glass shaped into a horizontally elongated rectangular plate. The display device 100 is provided with a single reflector 30 arranged to face multiple displays 20. The reflector 30 is horizontally elongated and arranged with its longitudinal direction aligned with the width direction WD of the vehicle A. The reflector 30 forms the display area DA of the display device 100 with its reflective surface 31, making it possible to make the display area DA consisting of the horizontally elongated reflective surface 31 appear as a pseudo-large display.

The reflecting mirror 30 is tilted forward Ze as it extends upward Ue, with the reflecting surface 31 facing each display surface 21. The distance between the reflecting surface 31 and the display surface 21 increases as it extends backward Go. The reflecting surface 31 reflects the light of the display image Di incident from the display surface 21 upward Ue toward the driver Dv and passenger Pg. The driver Dv and passenger Pg view a virtual image Vi of the display image Di displayed on the display surface 21 in front Ze (the rear side) of each reflecting surface 31.

The display 20 located on the far left of the multiple displays projects an image captured of the left rear side of vehicle A onto the reflector 30, causing the leftmost region of the display area DA to function as an electronic mirror replacing the left side mirror. Similarly, the display 20 located on the far right projects an image captured of the right rear side of vehicle A onto the reflector 30, causing the rightmost region of the display area DA to function as an electronic mirror replacing the right side mirror.

The second display 20 from the left projects information indicating the driving status of vehicle A, such as driving speed, driving mode, mileage, and instantaneous fuel economy (or instantaneous electric consumption), onto the reflector 30, causing the area of display area DA facing the driver to function as a combination meter. The third display 20 from the left (in the center of the vehicle) displays, for example, navigation-related images in the center area of display area DA. The fourth display 20 from the left displays video content, etc., intended for passenger Pg, in the area of display area DA facing the passenger. The display positions of the above display contents may be changed as appropriate based on user operation, etc. Furthermore, display content different from the above may be displayed in each area of display area DA.

The hood 40 is formed into a horizontally elongated plate shape using a light-blocking resin material or the like. The hood 40 is positioned slightly inclined relative to the horizontal plane, above Ue, the multiple displays 20 and the ultra-wide reflector 30. The hood 40 covers the reflecting surface 31 from above Ue, thereby blocking external light (e.g., sunlight) from directly entering the display area DA. At least a portion of the upper surface (front surface) of the hood 40, located forward Ze, is covered by the instrument panel 10. This arrangement allows the hood 40 to be integrated with the instrument panel 10.

The hood 40 slopes upward Ue as it extends toward the rear Go. The angle of inclination of the hood 40 is set so that it is roughly parallel to the line of sight from the driver Dv's eyepoint (hereinafter referred to as eyepoint EP1) toward the hood 40, in order to make the hood 40 appear thinner. Of the two sides of the hood 40, the back surface 41 facing downward Si is provided with a holding portion 42. The holding portion 42 individually holds multiple displays 20. Each display 20 is held on the back surface 41 slightly forward Ze of the edge portion (hereinafter referred to as the eaves portion 43) of the hood 40 at the rear Go. Each display 20 may be held to the holding portion 42 by adhesive, double-sided tape, or the like, or via an attachment member or the like.

Like the hood 40, the shielding portion 50 is formed from a light-blocking resin material or the like. The shielding portion 50 may be a component attached to the hood 40, or may be a part of the hood 40 molded integrally with the hood 40. The shielding portion 50 protrudes downward Si from the eaves portion 43 of the back surface 41, which is located closer to the occupant (rearward Go) than each display 20. The leading edge of the shielding portion 50 in the protruding direction (hereinafter referred to as the top edge 54) is located below the display 20 Si. By being positioned behind Go of the display 20, the shielding portion 50 conceals the display 20 held on the back surface 41 of the hood 40 from the driver Dv, making it invisible.

Here, because the display device 100 forms a pillar-to-pillar display area DA, not only the driver Dv but also the passenger Pg can see the display area DA located directly in front of the driver Dv. Similarly, the driver Dv may also see the display area DA located directly in front of the passenger Pg. For these reasons, the shielding portion 50 is required to have a shape that hides the display surface 21 of all displays 20 from both the driver Dv and the passenger Pg. Below, the details of the shape of the shielding portion 50 that hides all display surfaces 21 from the driver Dv and the passenger Pg are further explained based on Figures 3 to 8, with reference to Figures 1 and 2.

Iris for the driver Dv and passenger Pg are set within the vehicle cabin of vehicle A. Iris is a virtual spatial region defined for each vehicle model, and is set as a virtual ellipsoid based on the eye range, which statistically represents the spatial distribution of eye points. Specifically, a driver iris EL1 (see Figure 4) is set as the spatial region where the driver's eye point EP1 is assumed to be located. Similarly, a passenger iris EL2 (see Figure 5) is set as the spatial region where the passenger Pg's eye point (hereinafter referred to as passenger eye point EP2) is assumed to be located. Each iris EL1, EL2 is located near the headrest of the driver's seat and the passenger seat. Iris EL1, EL2 generally fall within the 90th percentile and 99th percentile ranges. In the present disclosure, a 90th percentile iris is used for each iris EL1, EL2.

A first virtual line VL1 (see Figure 4) and a second virtual line VL2 (see Figure 5) are defined based on each iris EL1, EL2. The first virtual line VL1 is a virtual line connecting the lowest point LEP1 of the driver iris EL1 to the rear edge BEd of the display surface 21, which is the farthest from the shielding portion 50. The second virtual line VL2 is a virtual line connecting the lowest point LEP2 of the passenger iris EL2 to the rear edge BEd of the display surface 21. The rear edge BEd is the side of the four sides that define the rectangular display surface 21 that is aligned in the width direction WD and closest to the reflective surface 31.

The points where the first and second virtual lines VL1 and VL2 intersect with the occlusion portion 50 are the driver visibility prevention point VP1 and passenger visibility prevention point VP2, respectively. Here, an infinite number of first and second virtual lines VL1 and VL2 connecting the lowest points LEP1 and LEP2 with any point on the rear edge BEd can be defined. Therefore, a driver visibility prevention line SL1 (see Figure 7) is defined in the space below the eaves portion 43 as a collection of countless driver visibility prevention points VP1, which are the intersections of the first virtual line VL1 and the occlusion portion 50. Similarly, a passenger visibility prevention line SL2 (see Figure 7) is defined in the space below the eaves portion 43 as a collection of countless passenger visibility prevention points VP2, which are the intersections of the second virtual line VL2 and the occlusion portion 50. The driver visibility prevention line SL1 is closest to the back surface 41 of the hood 40 approximately in front of the driver Dv, and becomes farther away from the back surface 41 as it moves toward the front of the passenger Pg. The passenger visibility prevention line SL2 is closest to the back surface 41 of the hood 40 approximately in front of the passenger Pg, and becomes farther away from the back surface 41 as it moves toward the front of the driver Dv.

If the protruding height h of the shielding portion 50 from the eaves portion 43 were constant (see dashed line in Figure 7), the shielding portion 50 extending in a strip shape along the width direction WD would cause the entire hood 40 to be perceived as a thick member. This could result in a deterioration in the design of the display device 100. In addition, if the eyepoints EP1, EP2 are located above the irises EL1, EL2, the visibility of the display area DA (virtual image Vi) could be reduced due to being blocked by the shielding portion 50.

To avoid such deterioration in design and visibility, the protruding height h of the shielding portion 50 varies continuously in the width direction WD. Specifically, the protruding height h is determined based on the lower one of the first imaginary line VL1 and the second imaginary line VL2, and increases or decreases so that both the first imaginary line VL1 and the second imaginary line VL2 intersect with the shielding portion 50. The protruding height h is lowest at the center of the width direction WD and gradually increases toward the outside in the width direction WD. In the left area located in front of the driver Dv, the protruding height h is determined based on the second imaginary line VL2, with the top edge 54 aligned with the passenger visibility prevention line SL2. Meanwhile, in the right area located in front of the passenger Pg, the protruding height h is determined based on the first imaginary line VL1, with the top edge 54 aligned with the driver visibility prevention line SL1.

The protruding height h can be reduced as the display 20 approaches horizontal, and increases as the display 20 becomes more inclined relative to the horizontal plane. Additionally, in the left and right end regions 56h, 56m of the shielding portion 50 in the width direction WD, the protruding height h gradually decreases toward the outside in the width direction WD (see Figure 8). Each end region 56h, 56m is located further outward in the width direction WD than the driver Dv and passenger Pg, and is an area where the display surface 21 is not visible from each iris EL1, EL2. The area of each end region 56h, 56m facing the left and right ends 47h, 47m of the hood 40 constitutes an invisible region 56a, where the driver Dv and passenger Pg cannot see the display 20 itself. The area inside each invisible region 56a constitutes a cut-off region 56b, where only the side of the display 20 is visible to the driver Dv and passenger Pg. In each end region 56h, 56m, the top edge 54 approaches the back surface 41 of the hood 40 as it moves from the visible region 56b toward the invisible region 56a, and is connected to each end 47h, 47m of the hood 40.

In the cross section of the hood 40 and the shielding portion 50, the length of the depth of the eaves portion 43 (hereinafter also referred to as the hood margin), in other words, the cross-sectional width of the shielding portion 50 along the fore-and-aft direction (hereinafter referred to as the wall width w), varies continuously in the width direction WD (see Figure 3). The wall width w of the shielding portion 50 is the dimension from the leading edge 44 (see Figures 4 to 6) of the hood 40 that protrudes furthest toward the occupant (rearward Go) to the position where the back surface 52 of the shielding portion 50 and the underside surface 41 of the hood 40 intersect. The wall width w is greatest at the center in the width direction WD (see Figure 6) and gradually decreases toward each end region 56h, 56m. In this way, the wall width w is larger in positions (central portions) where the display 20 is more inclined relative to the horizontal plane.

The cross section of the shielding portion 50 (see Figure 4) is triangular. Specifically, the cross section of the shielding portion 50 is a right triangle in which the back surface 52 facing the display 20 is perpendicular to the back surface 41 of the hood 40. The top edge 54 of the shielding portion 50, which protrudes furthest downward Si, is closer to the front edge FEd of the display surface 21 in the front-to-rear direction than the tip edge 44. Of the four sides that define the rectangular display surface 21, the front edge FEd is the side that runs along the width direction WD and is farthest from the reflective surface 31. A viewing surface 53 is formed between the tip edge 44 and the top edge 54, sloping forward Ze as it extends downward Si. The driver Dv and passenger Pg view the viewing surface 53, which is sloping backward.

As described above, if the cross-sectional shape of the shielding portion 50 is a right triangle, the inclination of the viewing surface 53 relative to the back surface 41 can be made as gentle as possible within the limited hood space. In addition, the greater the inclination of the hood 40, the wider the wall width w is ensured. Therefore, even if the inclination of the hood 40 increases or decreases in the width direction WD, the inclination of the viewing surface 53 remains roughly constant overall, or becomes closer to horizontal the greater the inclination of the hood 40. As a result, the shielding portion 50 is less visually noticeable. In addition, if the cross-sectional shape of the shielding portion 50 is a right triangle, the area of the back surface 52 facing the reflective surface 31 is minimized. Therefore, the phenomenon in which external light reflected by the reflective surface 31 or light leaking from the display 20 is re-reflected by the back surface 52 and reflected in the display area DA (whiteout) is less likely to occur.

In the first embodiment described so far, both the first virtual line VL1 and the second virtual line VL2 connecting the lowest points LEP1, LEP2 of each iris EL1, L2 and the rear edge BEd of the display surface 21 intersect with the shielding portion 50. Therefore, even if the driver Dv and passenger Pg's eye points EP1, EP2 are lowered, it becomes difficult for them to see the rear side of the display surface 21. In addition, by using one of the first virtual line VL1 and the second virtual line VL2 located on the lower side Si as the reference, the protruding height h of the shielding portion 50 can be appropriately suppressed. As a result of the above, it is possible to make the display 20 invisible to multiple occupants without interfering with their visibility of the virtual image Vi.

In addition, in the first embodiment, the inclination of the display 20 relative to the horizontal plane varies in the width direction WD. The greater the inclination of the display 20, the greater the position at which the shielding portion 50 is likely to require a protruding height h. By ensuring such wall width w, the shielding portion 50 tends to have a shape that makes the protruding height h less noticeable. As a result, the display 20 can be prevented from being seen, while minimizing deterioration in the design of the display device 100.

Furthermore, in the first embodiment, the top edge 54 of the shielding portion 50 that protrudes furthest downward Si is closer to the display 20 than the tip edge 44 of the hood 40 that protrudes furthest toward the occupant. Therefore, the shielding portion 50 allows the driver Dv and passenger Pg to view the viewing surface 53 that slopes forward Ze as it extends downward Si. With this inclined position of the viewing surface 53, the protruding height h of the shielding portion 50 is less noticeable than in a configuration in which the viewing surface 53 is erected perpendicular to the underside 41 of the hood 40. Therefore, deterioration in the design of the display device 100 can be further suppressed.

Furthermore, in the first embodiment, the protruding height h in the end regions 56h, 56m of the shielding portion 50 decreases as it moves outward in the width direction WD. In this way, a shielding portion 50 having a shape in which the protruding height h gradually decreases in the end regions 56h, 56m makes the thickness of the hood 40 less noticeable than a shape in which the protruding height h is maintained in the end regions 56h, 56m. Therefore, it is easier to ensure the design of the display device 100 while preventing the display 20 from being seen.

In addition, in the first embodiment, the shielding portion 50 is a separate member from the hood 40, making it detachable from the hood 40. This makes it possible to retrofit a shielding portion 50 with an appropriate protrusion height h depending on the body type of the driver Dv or other occupant.

In the first embodiment, the vehicle A corresponds to the "moving body," the reflector 30 corresponds to the "reflective optical element," and the visor portion 43 corresponds to the "tip portion." Furthermore, the driver iris EL1 and the passenger iris EL2 each correspond to the "iris," and the driver eye point EP1 and the passenger eye point EP2 each correspond to the "eye point."

Second Embodiment
A second embodiment of the present disclosure shown in FIGS. 9 and 10 is a modified example of the first embodiment. The display device 100 according to the second embodiment is electrically connected to a driver monitor 27 and a passenger monitor 28. The driver monitor 27 and the passenger monitor 28 each include a near-infrared light source, a near-infrared camera, and a control unit for controlling them. The driver monitor 27 is installed on the top surface of the steering column with the near-infrared camera facing the headrest of the driver's seat (see FIGS. 1 and 2 ). The driver monitor 27 uses the near-infrared camera to capture an image of the head of the driver Dv illuminated with near-infrared light from the near-infrared light source. The passenger monitor 28 is installed on the top surface of the instrument panel 10 in front of the passenger Pg (Z). The passenger monitor 28 uses the near-infrared camera to capture an image of the head of the passenger Pg illuminated with near-infrared light from the near-infrared light source.

In the driver monitor 27 and passenger monitor 28, images captured by the near-infrared cameras are analyzed by a control unit. The control unit extracts occupant status information, such as the position and line of sight of the eye points EP1 and EP2 of the driver Dv and passenger Pg, as well as the degree of eye opening, from the captured images and sequentially provides this information to the display device 100. The driver monitor 27 and passenger monitor 28 are provided integrally with the display device 100 and may be hidden by a reflector 30, a shielding unit 50, or the like.

The display device 100 includes a display ECU 60 equipped with a processor, RAM, a memory unit, an input/output interface, and a bus connecting these. The processor is hardware for arithmetic processing coupled to the RAM. The processor includes at least one arithmetic core, such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit). The display ECU 60 has functional units such as an eyepoint grasping unit 61 and a display control unit 63, which are implemented by the processor executing a display control program stored in the memory unit.

The eye point grasping unit 61 acquires occupant status information from the driver monitor 27 and the passenger monitor 28. The eye point grasping unit 61 grasps the position of the driver's eye point EP1 based on the occupant status information acquired from the driver monitor 27. The eye point grasping unit 61 grasps the position of the passenger's eye point EP2 based on the occupant status information acquired from the passenger monitor 28.

The display control unit 63 controls the display of the display image Di by each display 20. The display control unit 63 adjusts the brightness of the display image Di by each display 20. If the positions of the eyepoints EP1 and EP2 grasped by the eyepoint grasping unit 61 deviate from the position Si below each iris EL1 and EL2, the display control unit 63 reduces the display brightness of the display image Di on the display surface 21.

The second embodiment described so far also achieves the same effects as the first embodiment, and the shielding portion 50 can prevent the display image Di on the display surface 21 from being cut off while not obstructing the visibility of the virtual image Vi (see Figure 1) for multiple occupants.

In addition, in the second embodiment, if the positions of the eye points EP1, EP2 grasped by the eye point grasping unit 61 deviate from the position below the irises EL1, EL2, the display control unit 63 reduces the display brightness of the display image Di. Therefore, even in a scene where the driver Dv or passenger Pg loses their posture and the occupant's line of sight LS passes below the top edge 54, it is possible to make the display image Di displayed on the display surface 21 less noticeable. As a result, it is not necessary to make the shielding portion 50 excessively large to take into account posture loss, and the design of the display device 100 can be ensured without interfering with the visibility of the virtual image Vi.

In addition, if the reflectance of the reflective optical element can be controlled by the display ECU 60, control may be implemented to increase the reflectance of the reflective optical element in accordance with a decrease in the display brightness of the display image Di to compensate for the decrease in brightness.

(Third embodiment)
9, 11, and 12 is a modification of the second embodiment. In the display device 100 according to the third embodiment, the display control unit 63 moves the position of the display image Di to be displayed as content on each display 20 along the display surface 21 in accordance with the positions of the eye points EP1 and EP2 grasped by the eye point grasping unit 61.

If the positions of the eye points EP1, EP2 deviate from the downward position Si of the irises EL1, EL2 (see FIG. 11), the display control unit 63 moves the display position of the display image Di on the display surface 21 toward the shielding portion 50 (rearward Go). The display image Di moves away from the rear edge BEd. For example, if the driver Dv loses a significant amount of posture, the display control unit 63 identifies the range (see shielding range BA in FIG. 11) in which the occupant's line of sight LS from the driver's eye point EP1 toward the display surface 21 is blocked by the shielding portion 50. The display control unit 63 moves the display image Di within the shielding range BA. The display control unit 63 may move only some of the display images Di displayed on the display surface 21, or may move all of the display images Di displayed on the display surface 21 while maintaining their relative positions.

The display control unit 63 moves the display position of the display image Di on the display surface 21 in a direction closer to the shielding unit 50 (rearward Go) in response to upward movement of the positions of the eye points EP1 and EP2. For example, if the driver Dv's head moves upward Ue and the driver's eye point EP1 is located at the top of the driver's eyelips EL1, the display area DA blocked by the shielding unit 50 becomes larger. The display control unit 63 identifies the range (see hidden area HA in Figure 12) where the virtual image Vi (see Figure 1) of the display image Di formed by the reflecting surface 31 becomes invisible due to the driver's eye point EP1 moving upward Ue. The display control unit 63 moves the display image Di toward the occupant so that it is out of the hidden area HA.

The display control unit 63 provides a margin on the display surface 21 of each display 20 in advance, and shifts the entire display image Di outside the hidden area HA in accordance with the movement of the driver eye point EP1 and passenger eye point EP2. When multiple display images Di (content) are displayed on the display surface 21, the display control unit 63 defines a priority for each display image Di. For example, the display control unit 63 sets display images Di such as legal notices and telltale warning lights as high-priority content. If the display control unit 63 cannot shift the entire display image Di, it preferentially moves legal notices and telltale warning lights outside the hidden area HA, allowing the driver Dv to see the virtual image Vi.

The third embodiment described so far also achieves the same effects as the first embodiment, preventing the display image Di from being cut off while not interfering with the visibility of the virtual image Vi. Specifically, in the third embodiment, if the positions of the eye points EP1, EP2 deviate from the position below the irises EL1, EL2, the display control unit 63 moves the display position of the display image Di on the display surface 21 toward the shielding portion 50. Therefore, even in a scene where the driver Dv or passenger Pg loses posture and the occupant's line of sight LS passes below the top edge 54, the shielding portion 50 can hide the display image Di. As a result, the shielding portion 50 does not need to be excessively large to account for posture loss, which makes it less likely that the design of the display device 100 will be compromised.

In addition, in the third embodiment, in response to the upward movement of the positions of the eye points EP1 and EP2 toward Ue, the display control unit 63 moves the display position of the display image Di on the display surface 21 in a direction closer to the shading unit 50. This prevents the virtual image Vi of the display image Di from becoming invisible due to the shading unit 50.

(Fourth embodiment)
The fourth embodiment of the present disclosure shown in FIGS. 13 and 14 is another modified example of the first embodiment. In the display device 100 according to the fourth embodiment, the shielding portion 50 is formed of a flexibly deformable material such as silicone. The shielding portion 50 is provided with a plurality of extrusion mechanisms 480. The extrusion mechanisms 480 are arranged at intervals from each other in the width direction WD. The extrusion mechanisms 480 extrude the top edge 54 downward Si at a plurality of locations on the shielding portion 50. The extrusion mechanisms 480 individually increase or decrease the protrusion height h of the shielding portion 50 at a plurality of locations (see dashed lines in FIG. 14 ). The extrusion mechanisms 480 may extrude the shielding portion 50 mechanically, or may extrude the shielding portion 50 using air pressure or the like.

In addition to the eyepoint determination unit 61 and display control unit 63, the display ECU 60 further includes a shielding control unit 65. The shielding control unit 65 controls the operation of each push-out mechanism 480 according to the position of each eyepoint EP1, EP2 (see Figures 4 and 5) determined by the eyepoint determination unit 61. The shielding control unit 65 adjusts the protrusion height h at each point so that the intersection of the shielding unit 50 with both the first virtual line VL1 and the second virtual line VL2 (see Figures 4 and 5) is maintained.

In the fourth embodiment described above, the shape of the shielding portion 50 is changed depending on the positions of the driver's eye point EP1 and the passenger's eye point EP2. Therefore, the same effect as in the first embodiment is achieved, making it possible to make the display 20 invisible while not interfering with the visibility of the virtual image Vi (see FIG. 1). In the fourth embodiment described above, the extrusion mechanism 480 corresponds to the "adjustment mechanism."

Fifth Embodiment
15 to 17 are still another modified example of the first embodiment. In the display device 100 according to the fifth embodiment, the entire display area DA is covered by a plate-shaped ornament 550. The ornament 550 protects the display 20 and the reflector 30 by covering the opening of the display device 100. The ornament 550 has a large number of light control films 580 arranged in a matrix (see FIG. 16 ).

The light control film 580 switches between a transmissive state in which light passes through and a light-blocking state in which light is blocked (see the dotted areas in Figures 16 and 17) by changing the light transmittance. When the light control film 580 above Ue as seen from the hood 40 is in the light-blocking state, a blocking section 50 is formed that prevents the display 20 from being seen.

The shading control unit 65 controls the transmittance of each light control film 580 by controlling the voltage applied to each light control film 580. The shading control unit 65 can individually switch each light control film 580 between a transparent state and a shading state. The shading control unit 65 changes the transmittance of each light control film 580 depending on the position of each eyepoint EP1, EP2 (see Figures 4 and 5) grasped by the eyepoint grasping unit 61. The shading control unit 65 increases or decreases the number of light control films 580 in the shading state so that the intersection of the shading portion 50 with both the first virtual line VL1 and the second virtual line VL2 (see Figures 4 and 5) is maintained, thereby expanding or contracting the opaque range forming the shading portion 50. Based on this control by the shading control unit 65, each light control film 580 gradually moves its top edge 54 upward Ue or downward Si, allowing the protruding height h of the shading portion 50 to be adjusted.

In addition, the shading control unit 65 changes the shape of the shading unit 50 depending on the content to be displayed in the display area DA. The shading control unit 65 enables a private view for the driver Dv or passenger Pg. When video content is displayed in the area directly in front of the passenger Pg, the shading control unit 65 sets the private view mode (see Figure 17) to a light-blocking state for all of the light-control films 580 in the center widthwise position. As a result, the driver Dv cannot view the video content while driving. This viewing restriction allows the video content to be provided to the passenger Pg without interfering with the driver Dv's driving.

In the fifth embodiment described so far, the opaque area forming the shielding portion 50 is expanded or contracted depending on the positions of the driver's eye point EP1 and the passenger's eye point EP2. Therefore, the same effect as in the first embodiment is achieved, making it possible to make the display 20 invisible while not interfering with the visibility of the virtual image Vi (see Figure 1).

(Sixth embodiment)
18 is yet another modified example of the first embodiment. A display device 600 according to the sixth embodiment does not include a configuration corresponding to the shielding unit 50 (see FIG. 1 ) of the above-described embodiment. In the display device 600, each display 20 is held by the hood 40 with the display surface 21 aligned along one of the first virtual line VL1 (see FIG. 4 ) and the second virtual line VL2, whichever is located on the lower side Si.

Specifically, in the area directly in front of the driver Dv, the second imaginary line VL2 is positioned below the first imaginary line VL1 (see FIG. 7). Therefore, the display 20 positioned in the area directly in front of the driver Dv is held by the holding portion 42 of the hood 40 with the display surface 21 aligned along the second imaginary line VL2. Like the display surface 21, the back surface 41 forming the holding portion 42 is also inclined (parallel) to the second imaginary line VL2 in the front-to-rear direction. The rear edge BEd and the front edge FEd of the display surface 21 are both located on the second imaginary line VL2. In the sixth embodiment, if the second imaginary line VL2 connecting any point on the rear edge BEd (e.g., the midpoint in the width direction WD) and the lowest point LEP2 intersects with the front edge FEd, the display surface 21 of the display 20 is considered to be aligned with the second imaginary line VL2.

With the above-described display 20 placement, if the driver's eye point EP1 is located at the lowest point LEP1 (see Figure 4), the driver Dv will not be able to see the display surface 21 of the display 20 located in the area directly in front of him/her because it will be blocked by the eaves portion 43.

On the other hand, in the area directly in front of the passenger Pg, the first imaginary line VL1 is positioned below the second imaginary line VL2 (see FIG. 7). Therefore, the display 20 positioned in the area directly in front of the passenger Pg is held by the holder 42 of the hood 40 with the display surface 21 aligned along the first imaginary line VL1. The rear edge BEd and the front edge FEd of the display surface 21 are both located on the first imaginary line VL1. Even in this case, if the first imaginary line VL1 connecting any point on the rear edge BEd and the lowest point LEP1 (see FIG. 4) intersects with the front edge FEd, the display surface 21 of the display 20 is considered to be aligned with the first imaginary line VL1.

With the above-described display 20 placement, if the passenger eye point EP2 is located at the lowest point LEP2, the display surface 21 of the display 20 located directly in front of the passenger Pg will be blocked by the eaves portion 43 and will be impossible for the passenger Pg to see.

In the sixth embodiment described so far, the display 20 is held by the hood 40 with the display surface 21 aligned with either the first virtual line VL1 or the second virtual line VL2, whichever is located lower Si. Therefore, even if the driver Dv and passenger Pg's eye points EP1 and EP2 are lowered, it becomes difficult for them to see the far side of the display surface 21. Furthermore, because the shielding portion 50 is not required, the virtual image Vi is easily visible. As a result, it is possible to make the display 20 invisible to multiple occupants without interfering with their ability to see the virtual image Vi.

(Other embodiments)
Although several embodiments of the present disclosure have been described above, the present disclosure should not be construed as being limited to the above-described embodiments, and can be applied to various embodiments and combinations within the scope that does not deviate from the gist of the present disclosure.

In the display device 100 according to Variation 1 of the first embodiment, as shown in FIG. 19, the shape of the end regions 56h, 56m of the shielding portion 50 differs from that of the first embodiment. The left and right ends 57h, 57m of the shielding portion 50 are located inside the left and right ends 47h, 47m of the hood 40 in the width direction WD. More specifically, no shielding portion 50 is provided in the invisible region 56a of each end region 56h. Each end 57h, 57m of the shielding portion 50 is located in each cut-off region 56b. In each cut-off region 56b, the shielding portion 50 gradually reduces its protruding height h toward the outside in the width direction, connecting each end 57h, 57m to the back surface 41 of the hood 40. In this way, by not providing a shielding portion 50 in the invisible region 56a where the display 20 is not visible, the overall thickness of the shielding portion 50 can be made to appear thinner. Additionally, in variant 1, the inclination of the hood 40 relative to the horizontal plane is greatest in each frontal area of the driver Dv and passenger Pg. The protruding height h of the shielding portion 50 is greatest in each frontal area. As in variant 1 above, the protruding height h of the shielding portion 50 may be made greater the greater the inclination of the display 20. By setting the protruding height h of the shielding portion 50 in this way, it is possible to reliably prevent the display 20 from being seen.

In the display device 100 according to Variation 2 of the first embodiment described above, as shown in FIG. 20 , the wall width w of the shielding portion 50 is smaller than the length of the hood margin. A margin portion 47 that is continuous with the back surface 41 of the hood 40 is formed between the leading edge 44 and the shielding portion 50. If the length of the eave portion 43 in the front-to-rear direction can be sufficiently secured, as in Variation 2, the wall width w of the shielding portion 50 can be made shorter than the margin length of the hood 40, and a margin portion 47 without the shielding portion 50 can be formed. Such a margin portion 47 has the effect of making the eave portion 43 appear thinner, improving the appearance of the display device 100.

It is preferable that the wall width w is greater than the protrusion height h. However, in areas where the wall width w cannot be secured, the protrusion height h may be greater than the wall width w. This maintains the visibility countermeasure effect of the display 20. On the other hand, the relationship (ratio) between the wall width w and the protrusion height h may be maintained throughout the entire shielding portion 50.

In the display device 100 according to Variation 3 of the first embodiment, as shown in FIG. 21 , the eaves portion 43 of the hood 40 curves downward Si as it extends rearward Go. The curved shape of the eaves portion 43 forms a shielding portion 50. The tip edge 44 of the eaves portion 43 corresponds to the top edge 54 of the shielding portion 50. The top edge 54 is located below the driver visibility prevention line SL1 and the passenger visibility prevention line SL2 so as to block the first imaginary line VL1 and the second imaginary line VL2. Even in Variation 3, the overall thickness of the shielding portion 50 can be made to appear thinner. In addition, even with the shielding portion 50 integrated with the eaves portion 43, it is possible to prevent the display 20 from being seen from the lowest points LEP1 and LEP2.

In the display device 100 according to Variation 4 of the first embodiment, as shown in FIG. 22, the hood 40 and the shielding portion 50 are integrally molded. In Variation 4, the shielding portion 50 also has a top edge 54 that protrudes below the first virtual line VL1 and the second virtual line VL2 so as to intersect with both these lines. With this configuration, the boundary between the hood 40 and the shielding portion 50 becomes less noticeable, which can improve the appearance of the display device 100.

In the display device 100 according to Variation 5 of the first embodiment, as shown in FIG. 23, the cross-sectional shape of the shielding portion 50 is an isosceles triangle. That is, the face width of the viewing surface 53 and the face width of the back surface 52 are approximately the same. In Variation 5, the shielding portion 50 also has its top edge 54 positioned below the first and second virtual lines VL1 and VL2 so as to intersect with both these lines, preventing the display 20 from being seen from the lowest points LEP1 and LEP2. It is preferable that the back surface 52, which faces the reflective surface 31, be coated or textured to suppress reflection of external light reflected by the reflective surface 31 and light leaking from the display 20.

In the display device 100 according to Variation 6 of the first embodiment, as shown in FIG. 24, the shielding portion 50 has a hollow structure and includes an inclined plate portion 50a and a support wall 50b. This is desirable because light is absorbed in the hollow portion. The inclined plate portion 50a slopes forward Ze as it extends downward Si from the tip edge 44. The support wall 50b secures the inclined plate portion 50a to the back surface 52 of the eave portion 43. In Variation 6, the shielding portion 50 also has its top edge 54 positioned below Si the first and second imaginary lines VL1 and VL2 so as to intersect both of these lines, preventing the display 20 from being seen from the lowest points LEP1 and LEP2. Additionally, in Variation 6, external light reflected by the reflective surface 31 and light leaking from the display 20 enter the space between the eave portion 43 and the inclined plate portion 50a. This reduces re-reflection toward the reflecting surface 31, making it less likely that the virtual image will appear whitish.

In the display device 100 according to Variation 7 of the first embodiment, as shown in FIG. 25, the shielding portion 50 is formed in a flat plate shape. The shielding portion 50 extends downward Si from the rear surface 41 facing the leading edge 44. In Variation 7, the top edge 54 of the shielding portion 50 is also positioned below Si below the first virtual line VL1 and the second virtual line VL2 so as to intersect with both these virtual lines VL1 and VL2, thereby preventing the display 20 from being seen from each of the lowest points LEP1 and LEP2.

In the display device according to Variation 8 of the second and third embodiments, the eye point grasping unit is connected to the driver monitor, but not to the passenger monitor. The display device performs control such as reducing the brightness or moving the displayed image depending on the position of the driver's eye point. As in Variation 8, control such as reducing the brightness or moving the displayed image may be performed for only one of the driver or passenger.

The display attached to the back of the hood is not limited to an organic EL display as in the above embodiment. For example, a liquid crystal display with a backlight, or a display consisting of multiple light-emitting diodes, can be used as the display device. Furthermore, the display may be configured to display images in full color, or may be configured to display only images of a specific color.

The display device according to variant 9 of the first embodiment described above has the same number of reflectors 30 as the displays 20 (for example, five). The multiple reflectors 30 are arranged along the width direction WD of the vehicle A, just like the multiple displays 20. A reflector 30 slightly larger than one display 20 is arranged below Si of that display 20. The multiple reflectors 30 form the left edge region, the region in front of the driver, the center region of the vehicle, the region in front of the passenger, and the right edge region of the display area DA with their respective reflective surfaces 31. By arranging the multiple reflectors 30, the seams between the reflective surfaces 31 are made less noticeable, making it possible for the display area DA, consisting of the multiple reflective surfaces 31, to appear as a pseudo-large display.

The display area provided on the display device does not have to be pillar-to-pillar, as long as it is visible to multiple occupants. For example, independent display areas may be provided in the area directly in front of the driver and in the central area in the width direction. Furthermore, independent display areas may be provided in the area directly in front of the driver, the central area in the width direction, and the area directly in front of the passengers. These display areas may be vertically elongated. In addition, a single display and a single reflector positioned across the area directly in front of the driver and the central area in the width direction may form a continuous display area. Furthermore, the shielding portion does not have to be limited to passengers sitting in the front passenger seat. The protruding height of the shielding portion may be determined taking into account the eyepoints and irises of passengers sitting in the rear seats.

The display device according to the present disclosure can also be mounted on right-hand drive vehicles. Furthermore, the display device according to the present disclosure can also be mounted on moving objects other than vehicles. For example, the display device according to the present disclosure may be mounted on moving objects such as heavy machinery operated at work sites, railway cars, trams, and aircraft, as well as simulated moving objects such as driving toys and driving simulators arranged in amusement facilities, etc.

The control unit and method described in this disclosure may be implemented by a special-purpose computer comprising a processor programmed to execute one or more functions embodied in a computer program. Alternatively, the device and method described in this disclosure may be implemented by a special-purpose hardware logic circuit. Alternatively, the device and method described in this disclosure may be implemented by one or more special-purpose computers configured by combining a processor that executes a computer program with one or more hardware logic circuits. Furthermore, the computer program may be stored as instructions executed by a computer on a computer-readable non-transitory tangible storage medium.

A: Vehicle (moving object), BEd: Rear edge, EL1: Driver iris, EL2: Passenger iris, EP1: Driver eye point, EP2: Passenger eye point, DA: Display area, Di: Display image, Dv: Driver, LEP1, LEP2: Lowest point, Pg: Passenger, Si: Downward, Ue: Upward, VL1: First virtual line, VL2: Second virtual line, Vi: Virtual image, WD: Width direction, h: Projection height, w: Wall width, 20: Display, 21: Display surface, 30: Reflector (reflective optical element), 31: Reflecting surface, 40: Hood, 41: Back surface, 43: Eaves portion (tip portion), 44: Tip edge, 47h, 47m: (Hood) edge, 50: Shielding portion, 54: Top edge, 56h, 56m Edge region (of the shielding portion), 57h, 57m Edge (of the shielding portion), 61 Eyepoint grasping portion, 63 Display control portion, 480 Extrusion mechanism (adjustment mechanism), 580 Light control film, 100, 600 Display device

Claims (13)

A display device that displays a virtual image (Vi) visible to multiple occupants of a moving body (A),
At least one display (20) that displays the display image (Di) formed as the virtual image on a display surface (21);
At least one reflective optical element (30) having a reflective surface (31) that reflects light of the display image toward the occupant, and forming a display area (DA) extending along a width direction (WD) of the moving body by the reflective surface;
a hood (40) formed in a plate shape that is positioned above the reflecting optical element (Ue) and covers the reflecting surface, and that holds the display by a back surface (41) that is positioned on the reflecting optical element side;
a shielding portion (50) that protrudes downward (Si) from a tip portion (43) of the hood that is located closer to the occupant than the display and that conceals the display held on the back surface,
a virtual line connecting the lowest point (LEP1) of an iris (EL1) where the eye point (EP1) of the driver (Dv) who is the occupant is assumed to be located, the lowest point (LEP1) of the iris employing a 90th percentile iris , and the farthest back edge (BEd) of the display surface from the shielding portion, is defined as a first virtual line (VL1);
The iris (EL2) is assumed to be the iris where the eye point (EP2) of the passenger (Pg) sitting in the front passenger seat , who is another passenger than the driver, is located. The iris is the same 90th percentile iris as the driver's iris. If the imaginary line connecting the lowest point (LEP2) of the iris and the rear edge of the iris is a second imaginary line (VL2),
A display device in which the protruding height (h) from the tip portion of the shielding portion is determined based on one of the first virtual line and the second virtual line that is located below, and varies in the width direction so that both the first virtual line and the second virtual line intersect with the shielding portion. the inclination of the display relative to a horizontal plane, the inclination being upward as it goes toward the rear (Go) of the moving body , and varying in the width direction;
The display device according to claim 1 , wherein the wall width (w) of the shielding portion along the front-rear direction of the moving body increases as the tilt of the display increases. the inclination of the display relative to a horizontal plane varies in the width direction;
The display device according to claim 1 or 2, wherein the protrusion height increases as the tilt of the display increases. The display device according to any one of claims 1 to 3, further comprising an eye point grasping unit (61) that grasps the eye point position of at least one of the driver and the passenger. and an adjustment mechanism (480) for individually increasing or decreasing the protrusion height at a plurality of locations of the shielding portion.
5. The display device according to claim 4, wherein the adjustment mechanism adjusts the protrusion height so that an intersection state between both the first virtual line and the second virtual line and the shielding portion is maintained according to the position of the eyepoint grasped by the eyepoint grasper. A light control film (580) that forms the shielding portion by changing the transmittance,
The display device described in claim 4, wherein the light control film expands or contracts the opaque range forming the shielding portion so that the intersection state between both the first virtual line and the second virtual line and the shielding portion is maintained depending on the position of the eyepoint grasped by the eyepoint grasper. The display device described in any one of claims 4 to 6 further comprises a display control unit (63) that reduces the display brightness of the image displayed on the display surface when the eyepoint position detected by the eyepoint detection unit deviates from the lower part of the iris. The display device described in any one of claims 4 to 6 further comprises a display control unit (63) that, when the eyepoint position grasped by the eyepoint grasping unit deviates from the lower part of the iris, moves the display position of the display image on the display surface in a direction closer to the shielding portion. A display device according to claim 7 or 8, wherein the display control unit moves the display position of the display image on the display surface in a direction closer to the shielding portion in response to upward movement (Ue) of the eye point position. A display device according to any one of claims 1 to 9, wherein the top edge (54) of the shielding portion is closer to the display than the leading edge (44) of the hood that protrudes toward the occupant. A display device according to any one of claims 1 to 10, wherein the protrusion height decreases toward the outside in the width direction in the end regions (56h, 56m) of the shielding portion in the width direction. A display device as described in claim 11, wherein the ends (57h, 57m) of the shielding portion are located more inward than the ends (47h, 47m) of the hood in the width direction. A display device that displays a virtual image (Vi) visible to multiple occupants of a moving body (A),
At least one display (20) that displays the display image (Di) formed as the virtual image on a display surface (21);
At least one reflective optical element (30) having a reflective surface (31) that reflects light of the display image toward the occupant, and forming a display area (DA) extending along a width direction (WD) of the moving body by the reflective surface;
a hood (40) formed in a plate shape that is positioned above the reflecting optical element (Ue) and covers the reflecting surface, and that holds the display by a back surface (41) that is positioned on the reflecting optical element side;
a first virtual line (VL1) connecting the lowest point (LEP1) of the iris (EL1) where the eye point (EP1) of the driver (Dv) who is the occupant is assumed to be located, the lowest point (LEP1) of the iris when a 90th percentile iris is adopted , and the farthest rear edge (BEd) of the display surface from the leading edge (44) of the hood;
The iris (EL2) is assumed to be the iris where the eye point (EP2) of the passenger (Pg) sitting in the front passenger seat , who is another passenger than the driver, is located. The iris is the same 90th percentile iris as the driver's iris. If the imaginary line connecting the lowest point (LEP2) of the iris and the rear edge of the iris is a second imaginary line (VL2),
The display device is held by the hood in a position where the display surface is aligned along one of the first virtual line and the second virtual line that is located lower (Si).