JP2020148974A - Head-up display device - Google Patents

Abstract

To provide a head-up display device capable of projecting two virtual images at different distances and inexpensively avoiding an increase in size.SOLUTION: A head-up display device 100 includes a display screen 20 utilizing a windshield 8 of a moving body, a first optical mirror 17a disposed against the travelling direction of the moving body, a second optical mirror 17b disposed to face the first optical mirror 17a and on a farther side of an eye box EB than the first optical mirror 17a, a common display element 31 for forming an image as a source of a distant virtual image IM1 and a near virtual image IM2, and a third optical mirror 17c disposed adjacent to the light emission side of the display element 31. The display position of the near virtual image IM2 is different from the display position of the distant virtual image IM1 and is above the display position of the distant virtual image IM1. The near virtual image IM2 includes a warning display.SELECTED DRAWING: Figure 1

Description

The present invention relates to a head-up display device that projects an image by a display element as a virtual image.

In recent years, a head-up display device that projects a virtual image using a windshield of a vehicle or the like and displays it visually by the driver for the purpose of supporting safe driving by reducing the movement of the driver's line of sight (hereinafter, "" The development of "HUD device") is being actively carried out. In the past, it was only necessary to project content such as vehicle speed, indicators, and simple navigation at a position 2 to 3 meters from the driver, but in recent years, advanced navigation that superimposes the display on the road and the situation around the vehicle When there is a risk factor around the vehicle, especially in front of it, in combination with the information of the sensor to be detected, a marker or the like is superimposed on the risk factor. This is called an AR HUD device that combines augmented reality (AR) and a HUD device, and the projection distance of a virtual image is generally set far (from 5 m).

Patent Document 1 discloses a HUD device in which two virtual images are displayed at different distances from each other. In this apparatus, a magnifying optical element and a correction optical element are used as an imaging system, and two display elements, one for a near virtual image and the other for a far virtual image, are used. However, this device is larger and more costly than a general head-up display device. In particular, increasing the size of the head-up display device is likely to be a major problem in the design of the moving body.

JP-A-2018-124508

The present invention has been made in view of the above background technology, and an object of the present invention is to provide a head-up display device capable of projecting two virtual images at different distances, inexpensively, and avoiding an increase in size. To do.

In order to achieve the above object, the head-up display device according to the present invention includes a display screen using a windshield of the moving body, a first optical mirror arranged so as to face the traveling direction of the moving body, and first. A second optical mirror arranged on a side farther from the eyebox than the first optical mirror in a state facing the optical mirror, a common display element forming an image that is a source of a far virtual image and a near virtual image, and a display element. It is equipped with a third optical mirror arranged adjacent to the light emitting side, and the display position of the near virtual image is different from the display position of the far virtual image and above the display position of the far virtual image. , Includes warning display.

In the head-up display device, since the display element is a common display element that forms an image that is a source of the far virtual image and the near virtual image, it is possible to form the near virtual image and the far virtual image while avoiding an increase in cost. At this time, the third optical mirror adjacent to the display element can be easily accommodated in the space required for the configuration of a conventional general head-up display device, and the increase in size can be avoided. In addition, by making urgent warning information such as lane protrusion and meandering driving into a near virtual image, it is possible to distinguish it from a distant virtual image that generally has a high possibility of displaying risk factors, and to improve visibility for the driver. Can be done.

In a specific aspect of the present invention, in the head-up display device, the area of the first optical mirror is smaller than the area of the second optical mirror, and the area of the third optical mirror is larger than the area of the first optical mirror. small. In this case, the display light corresponding to the far virtual image and the display light corresponding to the near virtual image can be incorporated into the second optical mirror without waste to form a bright virtual image.

In another aspect of the present invention, the first optical mirror and the second optical mirror have a free curved surface. In this case, the angle of view can be widened to increase the degree of freedom in setting the virtual image distance.

In yet another aspect of the invention, the third optical mirror is planar. In this case, the third optical mirror can be easily manufactured and attached to the display element.

In yet another aspect of the invention, the third optical mirror has a free curved surface. In this case, the virtual image formed by the display light passing through the third optical mirror can be made high resolution.

In yet another aspect of the present invention, the display element has a rectangular display area, and the third optical mirror is arranged so that the reference axis perpendicular to the optical axis extends parallel to the long side direction of the display element. Will be done. In this case, the virtual image can be displayed in the horizontally long display area according to the human field of view.

In yet another aspect of the invention, the third optical mirror is placed on the optical path forming the near virtual image and the first optical mirror is placed on the optical path forming the far virtual image. In this case, it becomes easy to arrange the distant virtual image on the lower side.

In yet another aspect of the present invention, in the second optical mirror, at least a part of the first incident region where the light forming the far virtual image is incident and the second incident region where the light forming the near virtual image is incident is. overlapping.

In yet another aspect of the invention, the first optical mirror can be driven in a substantially normal direction of its optical surface. In this case, the projection distance of the distant virtual image whose main purpose is AR display can be changed, and the virtual image can be displayed at the focal position of the eye according to the speed of the moving object or at the exact position where there is an obstacle. Therefore, it works more effectively as a means of transmitting information to the driver or the driver.

It is a side sectional view which shows the main part of the HUD apparatus of embodiment. (A) is a plan view for explaining a display area in the display element, and (B) and (C) are a plan view and a side view for explaining an example of a method of arranging and fixing the third optical mirror to the display element. is there. It is a conceptual perspective view explaining the projection state by the apparatus of FIG. It is a conceptual diagram which looked at the projection area by the apparatus of FIG. 1 from the front. It is a conceptual block diagram explaining the circuit structure of the head-up display device including the part shown in FIG. It is a figure explaining the display state in the 1st projection area which is a relatively long distance. (A) and (B) are diagrams for explaining the display state in the second projection region at a relatively short distance. It is a figure explaining the modification of the HUD apparatus shown in FIG.

Hereinafter, specific embodiments of the head-up display device according to the present invention will be described with reference to the drawings.

The head-up display device 100 shown in FIG. 1 is mounted on a vehicle that is a moving body, and includes a drawing unit 10 and a display screen 20. In FIG. 1, the −Z direction indicates the traveling direction or the forward direction of the moving vehicle, and the + X direction corresponds to the lateral direction or the horizontal direction in which the two pupil HTs of the driver sitting in the driver's seat are lined up.

Of the head-up display (HUD) device 100, the drawing unit 10 is installed so as to be embedded in, for example, a dashboard (not shown) in front of the driver's seat, and is an independent 2 corresponding to an image including driving-related information, warning information, and the like. The type of display lights HK1 and HK2 are emitted toward the display screen 20. The display screen 20 is provided on a part of the windshield 8 of the moving vehicle. The display screen 20 reflects the display lights HK1 and HK2 from the drawing unit 10 toward the rear of the vehicle. The display lights HK1 and HK2 reflected by the display screen 20 are guided to the pupil HT of the driver sitting in the driver's seat and the eyebox EB spreading around the pupil HT. The driver can observe the two types of display lights HK1 and HK2 reflected by the display screen 20, that is, the two types of virtual images IM1 and IM2 in front of the vehicle body as display images by the HUD device 100. Here, the virtual images IM1 and IM2 not only have their projection directions shifted vertically, but also have different projection distances, and the driver recognizes that the virtual images IM1 and IM2 are at different positions in the vertical direction and the depth direction. Specifically, the display position of the far virtual image IM1 is set below the display position of the near virtual image IM2. On the other hand, the driver can observe the outside light transmitted through the light-transmitting display screen 20, that is, the scenery in front and the real image of the automobile or the like existing in front. As a result, the driver superimposes the external world image behind the display screen 20 on a virtual image (display image) including driving-related information, warning information, and the like formed by the reflection of the display lights HK1 and HK2 on the display screen 20. IM1 and IM2 can be observed at the same time.

The drawing unit 10 includes a display device 30 that forms a display image, a display drive unit 18 that operates the display device 30, a mirror optical system 17 for imaging in which display lights HK1 and HK2 from the display device 30 are incident. To be equipped. Of the drawing units 10, the mirror optical system 17 and the display screen 20 arranged above the drawing unit 10 are combined to generate a virtual image that converts the display image formed on the display surface 31a of the display device 30 into a virtual image. It constitutes an optical system 100b.

The display device 30 includes a display element 31 and a lighting device 32. The display element 31 is, for example, a transmissive display panel such as an LCD, and can display a two-dimensional image as a still image or a moving image on the display surface 31a extending along the XZ surface, for example. The illuminating device 32 uniformly illuminates the display element 31 from behind. The display element 31 is a common display element that forms an image that is the basis of the near virtual image IM2 and the far virtual image IM1.

As shown in FIG. 2A, the display surface 31a of the display element 31 is a display area DA having a rectangular outline. The longitudinal direction of the display region DA extends in the ± X direction perpendicular to the YZ plane including the optical axes AX1 and AX2 of the mirror optical system 17 shown in FIG. The display area DA of the display element 31 is substantially divided into two in a direction orthogonal to the longitudinal direction thereof, and has a pair of display areas DA1 and DA2. The display light HK1 is emitted from the first display area DA1, and an image corresponding to the distant virtual image IM1 is formed in the first display area DA1. The display light HK2 is emitted from the second display area DA2, and an image corresponding to the near virtual image IM2 is formed in the second display area DA2. Both display areas DA1 and DA2 have elongated rectangular contours extending in the ± X direction and have substantially the same area, but the areas of both display areas DA1 and DA2 are appropriately changed according to the sizes of the virtual images IM1 and IM2. It can be, and is not limited to the one shown. A non-display area ND is formed between the pair of display areas DA1 and DA2 from the viewpoint of preventing stray light, but the non-display area ND merely does not display and is not essential.

Returning to FIG. 1, the mirror optical system 17 is a magnifying optical system that magnifies an image formed on the display surface 31a of the display element 31 in cooperation with the display screen 20, and serves as a display image in front of the driver. The virtual images IM1 and IM2 are formed. The mirror optical system 17 is a reflective optical system and includes two first and second optical mirrors 17a and 17b having optical power as a reflecting element. Of these, the first optical mirror 17a is a reflecting element for a long distance. The mirror optical system 17 includes a third optical mirror 17c as a reflection element for a short distance. The third optical mirror 17c is arranged adjacent to the display surface 31a of the display element 31. That is, the third optical mirror 17c is arranged adjacent to the light emitting side of the display element 31. Here, the term “adjacent” includes the case where the third optical mirror 17c does not come into contact with the display surface 31a. As a result, the third optical mirror 17c is arranged on the optical path forming the near virtual image IM2, and the first optical mirror 17a is arranged on the optical path forming the far virtual image IM1.

The first optical mirror 17a is arranged in a state of facing the traveling direction of the moving body and facing the −Z direction, and has a convex surface facing the −Z direction in the YZ cross section. The first optical mirror 17a has a free curved surface as a reflecting surface. The second optical mirror 17b is arranged so as to face the rear of the moving body in the + Z direction, and has a concave surface facing in the + Z direction in the YZ cross section. The second optical mirror 17b has a free curved surface as a reflecting surface. Here, the second optical mirror 17b is arranged on the side farther from the eyebox EB than the first optical mirror 17a, that is, on the front side of the vehicle in a state of facing the first optical mirror 17a. The area of the first optical mirror 17a is smaller than the area of the second optical mirror 17b, and the area of the third optical mirror 17c is smaller than the area of the first optical mirror 17a. That is, the display light HK1 from the first optical mirror 17a and the display light HK2 from the third optical mirror 17c can be taken in without loss by the second optical mirror 17b having a relatively large area. The first and second optical mirrors 17a and 17b have symmetry with respect to the YZ cross section, but the first and second optical mirrors 17a and 17b are not limited to this and may have asymmetry in the X direction.

The third optical mirror 17c is, for example, a flat surface and has no optical power. The third optical mirror 17c may be aspherical. Assuming that the optical system is symmetrical with respect to the YZ cross section for the sake of brevity, the normal NO passing through the center of the third optical mirror 17c extends parallel to the YZ plane. That is, the third optical mirror 17c is arranged so that its reference axis SX extends parallel to the long side direction or the X direction of the display element 31. Here, the reference axis SX of the third optical mirror 17c extends perpendicularly to the optical axes AX1 and AX2 of the mirror optical system 17, and coincides with the longitudinal direction of the third optical mirror 17c. The reflective surface of the third optical mirror 17c corresponds to a state in which a surface parallel to the XY plane passes through the reference axis SX and is rotated around the reference axis SX at an appropriate inclination angle. However, not limited to this, the third optical mirror 17c may have asymmetry in terms of shape characteristics such as inclination and curvature in the X direction. In this case, it is desirable that the long side direction of the display element 31 coincides with the extending direction of the third optical mirror 17c.

As shown in FIGS. 2B and 2C, the display element 31 is fixed to a housing (not shown) by the holder 41, and the holder 41 has a third optical mirror with respect to the display element 31. Fixing members 41a for attaching the 17c are formed at two places. By using the fixing member 41a, the third optical mirror 17c can be precisely positioned and fixed with respect to the display surface 31a of the display element 31. In the state where the third optical mirror 17c is fixed to the display element 31, the end portion 17e of the third optical mirror 17c on the display element 31 side is the display element at the position of the non-display region ND shown in FIG. 2 (A). It is arranged in contact with or adjacent to the surface of the display element 31 so as to face the 31. The structure of the holder 41 for fixing the third optical mirror 17c to the display element 31 is not limited to the structure shown in the figure, and may have various structures, and the third optical device may have various structures other than the holder 41 of the display element 31. The mirror 17c can also be fixed.

Returning to FIG. 1, the display screen 20 has, for example, a translucent sheet 21 having a semitransparent property fixed so as to be attached to the inner surface of the windshield 8. The semi-transmissive sheet 21 of the display screen 20 can be a sheet in which a semi-transmissive reflective film made of a dielectric multilayer film or a metal film having an adjusted reflectance is formed on a resin base material. A Fresnel lens having a built-in three-dimensional structure having a film can also be used. The translucent sheet 21 may be sandwiched between the glass plates constituting the windshield 8. If the reflection angle of the windshield 8 is, for example, about 60 degrees, the reflectance is secured to about 15%, and it can be used as a transmissive reflective surface without providing a semi-transmissive reflective coat. ..

Hereinafter, an outline of the optical path in the HUD device 100 will be described with reference to FIG. The display light HK1 emitted from the display area DA1 of the display element 31 is reflected by the first optical mirror 17a and emitted forward, and is reflected by the second optical mirror 17b and emitted upward. The display light HK1 reflected by the second optical mirror 17b is partially reflected by the display screen 20 and incident on the driver's pupil HT in the eye box EB. The display light HK2 emitted from the display area DA2 of the display element 31 is reflected by the third optical mirror 17c and emitted forward, and is reflected by the second optical mirror 17b and emitted upward. The display light HK2 reflected by the second optical mirror 17b is partially reflected by the display screen 20 and incident on the driver's pupil HT in the eye box EB. At this time, the display light HK1 reflected by the first optical mirror 17a and the display light HK2 reflected by the third optical mirror 17c travel in a nearly parallel state and are incident on the second optical mirror 17b. However, due to the divergence of the display lights HK1 and HK2, both the display lights HK1 and HK2 are incident on the second optical mirror 17b in a state of partially overlapping in the vertical direction. That is, in the second optical mirror 17b, the first incident region IA1 on which the display light HK1 forming the far virtual image IM1 is incident and the second incident region IA2 on which the display light HK2 forming the near virtual image IM2 is incident are at least one. The parts overlap. Further, the optical axes AX1 and AX2 of the display lights HK1 and HK2 finally incident on the pupil HT have different angles with respect to the vertical Y direction, and for the driver, the distant virtual image IM1 by the display light HK1. Is arranged on the lower side, and the near-virtual image IM2 by the display light HK2 is arranged on the upper side. Further, due to the power of the third optical mirror 17c and the difference in the optical path lengths passing through the first and third optical mirrors 17a and 17c, there is a sufficient difference in projection distance between the far virtual image IM1 and the near virtual image IM2. It will be realized.

The appearance of the virtual images IM1 and IM2 will be described with reference to FIG. When viewed from the driver's seat 6 of the moving vehicle 2, the hyperopia region (first projection region) FS is set at a distance below the front horizontal direction and close to the road surface RS, and driving is performed. The person recognizes the far-sighted image IM1 in the hyperopic region FS. Further, when viewed from the driver's seat 6 of the vehicle 2, the myopia region (second projection region) NS is set at a short distance above the horizontal direction of the front surface and away from the road surface RS. FIG. 4 shows a specific example of the arrangement relationship between the far virtual image IM1 and the near virtual image IM2 as seen from the driver's seat 6. The arrangement and size of the hyperopia region FS and the myopia region NS shown in FIG. 3 and the like are merely examples, and the hyperopia region FS and the myopia region NS can be appropriately changed according to the application and specifications of the vehicle 2.

FIG. 5 is a block diagram illustrating the overall structure of the HUD device 100, and the HUD device 100 includes the drawing unit 10 and the display screen 20 shown in FIG. 1 as a part thereof. Hereinafter, the drawing unit 10 and the display screen 20 are collectively referred to as an image display device 200. The image display device 200 includes a display device 30, a display drive unit 18, and the like.

The HUD device 100 includes an environment monitoring unit 72 and a main control device 90 in addition to the image display device 200.

The environment monitoring unit 72 includes an object detection unit that detects an object existing in the detection area, and objects moving objects and people existing near the front, specifically, automobiles, bicycles, pedestrians, road accessories, and the like. It has a three-dimensional measuring instrument that identifies as and extracts three-dimensional position information of an object. The environment monitoring unit (object detection unit) 72 includes an external camera 72a, an external image processing unit 72b, and a determination unit 72c as three-dimensional measuring instruments. The external camera 72a enables the acquisition of an external image in the visible or infrared region. The external camera 72a is installed at an appropriate position inside and outside the vehicle 2, and captures a detection area in front of the driver or the windshield 8 as an external image. The external image processing unit 72b performs various image processing such as brightness correction on the external image captured by the external camera 72a to facilitate the processing by the determination unit 72c. The determination unit 72c detects the presence or absence of objects such as automobiles, bicycles, pedestrians, and road accessories by extracting or cutting out the object image from the external image that has passed through the external image processing unit 72b, and is attached to the external image. The spatial position of the object in front of the vehicle 2 is calculated from the depth information to be processed and stored in the storage unit 72m as three-dimensional position information. The storage unit 72m of the determination unit 72c stores software that enables the extraction of the object image from the external image, and the software required from the storage unit 72m during the operation of extracting the object image from the external image. The data is read. The determination unit 72c can detect what the object corresponding to the object element is, for example, from the shape, size, color, etc. of each object element in the obtained image. The judgment criteria at that time include a method of performing pattern matching with pre-registered information and detecting what the object is from the degree of matching. Further, from the viewpoint of increasing the processing speed, it is also possible to detect a lane from an image and detect an object from the above-mentioned shape, size, color, etc. of a target or an object element in the lane.

The display drive unit 18 operates the display device 30 under the control of the main control device 90 to independently display the far virtual image IM1 and the near virtual image IM2 behind the display screen 20.

The main control device 90 has a role of harmonizing the operations of the image display device 200, the environment monitoring unit 72, and the like. The main control device 90 adjusts the display content of the distant virtual image IM1 projected by the display device 30 so as to correspond to the spatial position of the object detected by the environment monitoring unit 72. That is, the main control device 90 generates an image that is the source of the virtual images IM1 and IM2 to be displayed on the image display device 200 from the object information received from the environment monitoring unit 72. Specifically, the main control device 90 superimposes the distant virtual image IM1 on the external world image to perform AR (Augmented Reality) display in which information is added to the external world image. Further, the main control device 90 displays information including a warning display related to driving by displaying the near virtual image IM2 regardless of the outside world image. The warning display includes, but is not limited to, lane protrusion, meandering driving, etc., and can include speed information and information on the driving environment.

Although not shown, the HUD device 100 obtains information from various sensors attached to the vehicle 2. For example, the HUD device 100 obtains information such as a moving speed and a traveling position from the vehicle 2.

FIG. 6 shows a display example of the distant virtual image IM1 displayed by the HUD device 100. The AR display image FI1 displayed as the distant virtual image IM1 is, for example, a sign such as a frame frame HW located around the car, a bicycle, a pedestrian, or other object OB existing behind the display screen 20. can do. The AR display image FI1 shows a case where a risk factor is lurking in front. Such a display can alert the driver to automobiles, bicycles, pedestrians and other objects in the vicinity.

FIG. 7A shows a display example of the near virtual image IM2 displayed by the HUD device 100. The warning display image FI2 displayed as the near virtual image IM2 includes, for example, lane protrusion marks M21 and M22 and a meandering mark M31 around the mark M1 indicating the own vehicle. As shown in FIG. 7B, when the vehicle 2 is traveling on the road RO at a predetermined speed or higher and the vehicle 2 moves to the right beyond the center line CL, the mark M1 indicating the own vehicle is displayed. It lights up and the lane protrusion mark M21 on the right side blinks. Although not shown, when the vehicle 2 is traveling on the road RO at a predetermined speed or higher and the vehicle 2 moves to the left beyond the side line SL, the mark M1 indicating the own vehicle lights up. , The left lane protrusion mark M22 blinks. Further, when the vehicle 2 is traveling on the road RO at a predetermined speed or higher and the vehicle body is swaying and meandering, the mark M1 indicating the own vehicle lights up and the lower meandering mark M31 blinks. Since the near virtual image IM2 is displayed in front of the driver at a short distance, it is possible to avoid being confused with the far virtual image IM1 or the AR display image FI1 and exert a strong alerting force.

In the head-up display device 100 according to the above embodiment, since the display element 31 is common to form the image that is the source of the near virtual image IM2 and the far virtual image IM1, the near virtual image IM2 and the far virtual image IM1 are avoided while avoiding cost increase. Can be formed. At this time, the third optical mirror 17c adjacent to the display element 31 can be easily accommodated in the space required in the configuration of a conventional general head-up display device, and the increase in size can be avoided. In addition, by setting urgent warning information such as lane protrusion and meandering driving as the near virtual image IM2, it is possible to distinguish it from the far virtual image IM1 which generally has a high possibility of displaying risk factors, and the visibility for the driver can be improved. Can be enhanced. If you set the sound to be emitted at the same time when displaying urgent warning information, it is effective even when you are driving asleep or looking aside.

Although the head-up display device as a specific embodiment has been described above, the head-up display device according to the present invention is not limited to the above. For example, in the above embodiment, a diffusion screen can be arranged at the position of the display element 31 and an image can be projected on the diffusion screen. In this case, a projection optical system that projects the image on the display element onto the diffusion screen is required. Further, the display element that forms an image is not limited to a transmissive display panel such as an LCD, but may be a reflective display panel such as LCOS or DMD.

With reference to FIG. 1, the first optical mirror 17a can be driven along a substantially normal direction of the optical surface OS1. In order to shift and move the first optical mirror 17a substantially along the direction of the normal line NO, a mirror drive unit 118 interlocking with the display drive unit 18 is provided along with the first optical mirror 17a. When the first optical mirror 17a is moved substantially along the normal NO direction in this way, the projection distance of the distant virtual image IM1 whose main purpose is AR display can be changed, and the focus of the eye according to the speed of the moving body. Since it becomes possible to display a virtual image at a position or at the exact position where an obstacle exists, it works more effectively as a means for transmitting information to the driver or the driver.

FIG. 8 shows a modified example of the HUD device 100 shown in FIG. In this case, it has the same structure as the HUD device 100 shown in FIG. 1 as a whole, but the third optical mirror 117c has a free curved surface. In this case, the near virtual image IM2 formed by the display light HK2 passing through the three optical mirrors 117c can be made high resolution.

2 ... Vehicle, 6 ... Driver's seat, 8 ... Windshield, 10 ... Drawing unit, 17 ... Mirror optical system, 17a ... 1st optical mirror, 17b ... 2nd optical mirror, 17c ... 3rd optical mirror, 17e ... End , 18 ... Display drive unit, 20 ... Display screen, 21 ... Semi-transparent sheet, 30 ... Display device, 31 ... Display element, 31a ... Display surface, 32 ... Lighting device, 41 ... Holder, 72 ... Environmental monitoring unit, 72a ... External camera, 72b ... External image processing unit, 72c ... Judgment unit, 72m ... Storage unit, 90 ... Main control device, 100 ... Head-up display device, 200 ... Image display device, AX1, AX2 ... Optical axis, DA ... Display area, DA1, DA2 ... Display area, EB ... Eye box, FI1 ... AR display image, FI2 ... Warning display image, FS ... Far vision area, HK1, HK2 ... Display light, HT ... Eyes, HW ... Frame frame, IA1, IA2 ... Incident region, IM1 ... Far virtual image, IM2 ... Near virtual image, ND ... Hidden region, NS ... Myopia region, OB ... Object, SX ... Reference axis

Claims (9)

A display screen that uses the windshield of a moving body,
A first optical mirror arranged so as to face the traveling direction of the moving body,
A second optical mirror arranged on a side farther from the eyebox than the first optical mirror while facing the first optical mirror.
A common display element that forms the image that is the source of the distant virtual image and the near virtual image,
A third optical mirror arranged adjacent to the light emitting side of the display element is provided.
The display position of the near virtual image is different from the display position of the far virtual image and is above the display position of the far virtual image.
The near-virtual image is a head-up display device including a warning display. The head according to claim 1, wherein the area of the first optical mirror is smaller than the area of the second optical mirror, and the area of the third optical mirror is smaller than the area of the first optical mirror. Up-display device. The head-up display device according to any one of claims 1 and 2, wherein the first optical mirror and the second optical mirror have a free curved surface. The head-up display device according to any one of claims 1 to 3, wherein the third optical mirror is a flat surface. The head-up display device according to any one of claims 1 to 3, wherein the third optical mirror has a free curved surface. The display element has a rectangular display area, and the third optical mirror is characterized in that a reference axis perpendicular to the optical axis extends parallel to the long side direction of the display element. The head-up display device according to any one of claims 1 to 5. Any of claims 1 to 6, wherein the third optical mirror is arranged on an optical path forming the near virtual image, and the first optical mirror is arranged on an optical path forming the far virtual image. The head-up display device according to item 1. In the second optical mirror, at least a part of the first incident region in which the light forming the far virtual image is incident and the second incident region in which the light forming the near virtual image is incident are overlapped. The head-up display device according to any one of claims 1 to 7. The head-up display device according to any one of claims 1 to 8, wherein the first optical mirror can be driven in a substantially normal direction of the optical surface thereof.

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