JP7110968B2 - head-up display device - Google Patents

Description

The disclosure of this specification relates to a head-up display device that displays a virtual image.

Conventionally, a head-up display device (hereinafter referred to as “HUD device”) is known that projects a display image onto a windshield of a vehicle or the like and allows a viewer such as a driver to view a virtual image of the projected display image. For example, the HUD device of Patent Literature 1 includes a first display, a second display, and a housing that accommodates these displays. The HUD device displays a near virtual image and a far virtual image at different distances from the windshield using light emitted from the first display and the second display.

Japanese Patent Application Laid-Open No. 2018-136420

There is a demand to increase the display area of the virtual image in the HUD device as disclosed in Patent Document 1. However, in order to increase the display area of the virtual image, it is necessary to enlarge the optical path and the optical system defined by the housing. Therefore, enlarging the display area of the virtual image inevitably leads to an increase in the size of the housing and thus the HUD device.

An object of the present disclosure is to provide a HUD device capable of enlarging the display area of a virtual image while avoiding an increase in size.

To achieve the above objectives, one aspect disclosed projects display light (27, 37) onto a projection member (WS) such that far viewing zone (63) and near viewing zone (63) are at different distances from the projection member. (62) is a HUD device that displays a virtual image (29, 39) of display light visible from an eyebox (EB) , and a near display image (26) formed in a near display area as the display light. and far display light of a far display image formed in the far display area; A magnifying optical element (40) that spreads the display light by reflection and is projected onto the projection member to define a near display area and a far display area together with the projection member, and a projection window (51) are formed on the upper surface located below the projection member. A display unit and a magnifying optical element are accommodated therein, and an optical path is defined inside for the near display light and the far display light emitted from the display unit to be emitted toward the projection member via the magnifying optical element. a housing (50), wherein the projection window has a size that does not block the optical path of the far display light; A HUD device in which the near view angle (ωnc, ωnc1, ωnc2) of the near display region is larger than the far view angle (ωfc, ωfc1, ωfc2) of the far display region on at least one side viewed from the eyebox. .

In this aspect, since the near display area is closer to the projection member than the far display area, even if the near angle of view is larger than the far angle of view, the optical path of the display light for virtual image display in the near display area is not in the far display area. It is difficult to protrude from the optical path of display light for virtual image display. Therefore, it is possible to widen the near display area by securing a larger near angle of view than the far angle of view while maintaining the size of the housing that defines the optical path. Therefore, a HUD device capable of enlarging the display area of a virtual image while avoiding an increase in size is realized.

It should be noted that the reference numbers in parentheses above merely indicate an example of correspondence with specific configurations in the embodiments described later, and do not limit the technical scope in any way.

It is a figure which shows typically the structure of the HUD apparatus by 1st embodiment. It is a block diagram showing an electrical configuration of the HUD device. FIG. 10 is a diagram schematically showing the relationship between the near display area and the far display area projected onto the virtual plane and the eyebox, and showing the respective positions of the far angle of view and the near angle of view. FIG. 4 is a view of the near display area and the far display area viewed in the direction of arrow IV in FIG. 3 and schematically showing the display viewed from the center of the eyebox. FIG. 4 is a view of the near display area and the far display area viewed in the direction of arrow V in FIG. 3 , and is a diagram schematically showing the display viewed from the left end of the eyebox. FIG. 4 is a view of the near display area and the far display area viewed in the direction of arrow VI in FIG. 3 , and schematically shows the display viewed from the right end of the eyebox. FIG. 10 is a diagram illustrating, in a list, a horizontal angle of view of a near display area that can be expanded with respect to a horizontal angle of view of a far display area; It is a figure which shows typically the structure of the HUD apparatus by 2nd embodiment. It is a block diagram showing an electrical configuration of the HUD device. FIG. 12 is a view of the near display area and the far display area viewed in the direction of the arrow X in FIG. 11 and schematically showing the display viewed from the center of the eyebox. FIG. 10 is a diagram schematically showing the relationship between the near display area and the far display area projected onto the horizontal virtual plane and the eyebox, and showing the locations of the far angle of view and the near angle of view. FIG. 4 is a diagram schematically showing the relationship between the near display area and the far display area projected on the vertical virtual plane and the eyebox, and showing the respective positions of the far angle of view and the near angle of view. FIG. 10 is a diagram schematically showing the relationship between the near display area and the far display area projected onto the horizontal virtual plane and the eyebox in the HUD device according to the third embodiment, and shows the locations of the far angle of view and the near angle of view. It is a diagram. FIG. 14 is a view of the near display area and the far display area viewed in the direction of arrow XIV in FIG. 13, and is a diagram schematically showing the display viewed from the center of the eyebox. FIG. 14 is a view of the near display area and the far display area viewed in the direction of arrow XV in FIG. 13, and is a diagram schematically showing the display viewed from the left end of the eyebox. FIG. 14 is a view of the near display area and the far display area viewed in the direction of arrow XVI in FIG. 13, and is a diagram schematically showing the display viewed from the right end of the eyebox. FIG. 19 is a view showing the display of the HUD device according to the fourth embodiment when viewed in the direction of arrow XVII in FIG. 18; FIG. 10 is a diagram schematically showing the relationship between the near display area and the far display area projected onto the horizontal virtual plane and the eyebox, and showing the locations of the far angle of view and the near angle of view. FIG. 21 is a diagram showing the display of the HUD device according to the fourth embodiment when viewed in the direction of arrow XIX in FIG. 20; FIG. 10 is a diagram schematically showing the relationship between the near display area and the far display area projected onto the horizontal virtual plane and the eyebox, and showing the locations of the far angle of view and the near angle of view. FIG. 10 is a diagram showing the display of the HUD device according to Modification 1 viewed from the front; FIG. 10 is a diagram showing a display of the HUD device according to modification 2 as viewed from the front; FIG. 11 is a diagram showing a display of the HUD device according to Modification 3 viewed from the front; FIG. 12 is a diagram showing a display of the HUD device according to Modification 4 viewed from the front; FIG. 12 is a diagram showing a display of the HUD device according to modification 5 viewed from the front; FIG. 12 is a diagram showing a display of the HUD device according to Modification 6 viewed from the front; FIG. 12 is a diagram showing a display of the HUD device according to Modification 7 viewed from the front; FIG. 12 is a diagram showing a display of the HUD device according to Modification 8 viewed from the front; FIG. 12 is a diagram showing a display of the HUD device according to Modification 9 viewed from the front;

A plurality of embodiments of the present disclosure will be described below based on the drawings. Note that redundant description may be omitted by assigning the same reference numerals to corresponding components in each embodiment. When only a part of the configuration is described in each embodiment, the configurations of other embodiments previously described can be applied to other portions of the configuration. In addition, not only combinations of configurations explicitly specified in the description of each embodiment, but also configurations of a plurality of embodiments can be partially combined even if they are not explicitly specified as long as there is no problem with the combination. Also, unspecified combinations of configurations described in a plurality of embodiments and modifications are also disclosed by the following description.

(First embodiment)
A HUD device 100 according to the first embodiment of the present disclosure shown in FIG. 1 is an in-vehicle display used in a vehicle A. FIG. The HUD device 100 is mounted on the vehicle A and presents various types of information related to the vehicle A to a viewer such as a driver. The HUD device 100 is arranged in front of the driver's seat and housed in the instrument panel of the vehicle A. As shown in FIG. In this description, expressions relating to directions such as front-rear, up-down, left-right, etc. are defined with reference to the vehicle A placed on a horizontal plane. Right and left are defined with reference to the driver seated in the driver's seat.

The HUD device 100 projects display light formed as a virtual image onto the projection area PA of the windshield WS. The display light projected onto the windshield WS is reflected toward the driver's seat side by the projection area PA and reaches an eyebox EB that is defined in advance to be positioned around the driver's head. A driver who positions the eyepoint EP in the eyebox EB can visually recognize the display light as a virtual image superimposed on the foreground. A driver recognizes various kinds of information by perceiving a virtual image.

A virtual image displayed by the HUD device 100 includes a near virtual image 29 and a far virtual image 39 . The near virtual image 29 and the far virtual image 39 are formed at different positions in the longitudinal direction of the vehicle A. As shown in FIG. The near virtual image 29 is formed at a position closer to the windshield WS than the far virtual image 39, specifically, in a space about 1 to 3 meters ahead of the vehicle A from the eye point EP. The far virtual image 39 is formed in a space about 5 to 20 meters in front of the vehicle A at a position farther from the windshield WS than the near virtual image 29, specifically, from the eye point EP.

The imaging positions of the near virtual image 29 and the far virtual image 39 are also shifted in the up-down (vertical) direction when visually recognized by the driver (see also FIG. 4 and the like). The imaging position of the near virtual image 29 is set to be slightly below the eyepoint EP. For example, vehicle speed, indicators, icons, and the like are displayed as the near virtual image 29 . The imaging position of the far virtual image 39 is set to be approximately the same height as the eye point. The distant virtual image 39 functions as an augmented reality (hereinafter “AR”) display by being superimposed on a specific superimposition target such as a road surface in the driver's view. For example, an arrow or the like instructing a right or left turn is displayed as the distant virtual image 39 by AR.

As shown in FIGS. 1 and 2, the HUD device 100 that displays such a virtual image includes an LCD (Liquid Crystal Display) projector 20, an enlarging optical element 40, a display control circuit 90, a housing 50, and the like.

The LCD projector 20 has a display configuration in which display light formed as a virtual image is emitted toward the magnifying optical element 40 . The LCD projector 20 has a display surface 23 that emits light to display an image formed as a virtual image. The LCD projector 20 is fixed to the housing 50 with the display surface 23 facing the magnifying optical element 40 . The LCD projector 20 is composed of an LCD panel 21, a backlight 22, and the like.

LCD panel 21 forms display surface 23 . The display surface 23 is substantially flat and has a horizontally long quadrilateral shape. A large number of pixels are arranged two-dimensionally on the display surface 23 . Each pixel is provided with red, green, and blue sub-pixels. The LCD panel 21 displays various images in color on the display surface 23 by controlling the light transmittance of each sub-pixel.

A near display image 26 formed as a near virtual image 29 and a far display image 36 formed as a far virtual image 39 are displayed on the display surface 23 . The display range of the near display image 26 is closer to the later-described convex mirror 41 than the display range of the far display image 36 is. In addition, the width of the display range of the near display image 26 is wider than the width of the display range of the far display image 36 . That is, the display surface 23 has a horizontally long trapezoidal shape.

The backlight 22 is composed of a plurality of light-emitting diodes that emit white light source light, and a prism or the like that guides the light emitted from each light-emitting diode to the LCD panel 21 . The light emitted from each light-emitting diode is guided to the back side of the display surface 23 and emitted toward the convex mirror 41 while transmitting and illuminating the near display image 26 and the far display image 36 drawn on the display surface 23 . be.

The magnifying optical element 40 spreads the respective display lights of the near display image 26 and the far display image 36 (hereinafter referred to as "near display light 27" and "far display light 37") emitted from the display surface 23 by reflection, Project on the projection area PA. In the magnifying optical element 40 , the magnification of the far virtual image 39 with respect to the far display image 36 is set larger than the magnification of the near virtual image 29 with respect to the near display image 26 .

The magnifying optical element 40 is composed of a convex mirror 41, a concave mirror 42, and the like. The convex mirror 41 and the concave mirror 42 are reflecting mirrors formed by vapor-depositing a metal such as aluminum on the surface of a colorless and transparent substrate made of synthetic resin, glass, or the like.

The convex mirror 41 is shaped like a rectangular plate that is smaller than the concave mirror 42 . The reflecting surface of the convex mirror 41 is curved to be convex. The convex mirror 41 is positioned behind the concave mirror 42 . The convex mirror 41 is directly or indirectly held by the housing 50 in a posture in which the convex reflecting surface faces the display surface 23 and the concave mirror 42 . The convex mirror 41 reflects the near display light 27 and the far display light 37 emitted from the display surface 23 toward the concave mirror 42 . Instead of the convex mirror 41 or together with the convex mirror 41, the magnifying optical element 40 may include a plane mirror or a concave mirror. That is, the magnifying optical element 40 is not limited to a convex-concave combination, and may be a concave-concave combination or a plane-concave combination.

The concave mirror 42 is shaped like a horizontally long rectangular plate that is larger than the convex mirror 41 . The reflecting surface of the concave mirror 42 is curved to be concave. The concave mirror 42 is positioned below the projection area PA and in front of the convex mirror 41 . The concave mirror 42 is directly or indirectly held by the housing 50 in a posture in which the concave reflecting surface corresponds to the projection area PA and the convex mirror 41 . The concave mirror 42 reflects the near display light 27 and the far display light 37 incident from the convex mirror 41 upward toward the windshield WS.

The display control circuit 90 is a circuit that controls display of the near virtual image 29 and the far virtual image 39 by the HUD device 100 . The display control circuit 90 is mainly composed of a microcontroller having a processor, a RAM, a storage medium, and the like. In addition to the LCD projector 20, the display control circuit 90 is electrically connected to a drawing ECU (Electronic Control Unit) 98 mounted on the vehicle A and the like.

The drawing ECU 98 determines the display contents of the HUD device 100 and sequentially outputs video data to the HUD device 100 . The drawing ECU 98 is electrically connected to the communication bus 99 of the in-vehicle network, and acquires data necessary for generating video data from the in-vehicle network. The drawing ECU 98 uses information obtained from an in-vehicle network or the like to generate video data including the near display image 26 and the far display image 36 in each frame image, and sequentially outputs the video data to the display control circuit 90 .

The display control circuit 90 controls the LCD panel 21 and the backlight 22 based on video data transmitted from the drawing ECU 98 . Specifically, the display control circuit 90 draws the near display image 26 and the far display image 36 on the display surface 23 based on the image data of each frame image. In addition, the display control circuit 90 partially drives the backlight 22 according to the content of each frame image, and selectively transilluminates the areas where the near display image 26 and the far display image 36 are located.

The housing 50 is made of a lightweight metal material such as aluminum, a resin material, or the like, and is formed into a container shape as a whole. The housing 50 accommodates optical elements such as the LCD projector 20, the convex mirror 41 and the concave mirror 42, and defines the relative positional relationship of these with high accuracy. Inside the housing 50, the near display light 27 and the far display light 37 emitted from the display surface 23 pass through the convex mirror 41 and the concave mirror 42, and each optical path is defined toward the windshield WS. ing.

A projection window 51 is formed on the upper surface of the housing 50 located below the projection area PA. The projection window 51 opens on the upper surface of the housing 50 in a shape that avoids the optical paths of the near display light 27 and the far display light 37 reflected by the concave mirror 42 . The projection window 51 is physically closed by a dustproof cover 53 . The dustproof cover 53 is made of a translucent synthetic resin material, and can transmit the near display light 27 and the far display light 37 toward the projection area PA.

Next, regarding the details of the optical design of the HUD device 100, the detailed positional relationship between the eyebox EB, the near display area 62, and the far display area 63 will be described based on FIGS. 3 to 6 and with reference to FIG. explain.

The eyebox EB is a horizontally long rectangular two-dimensional observation window having a height in the vertical direction and a width in the horizontal direction. The width of the eyebox EB is slightly larger than twice the distance between the left and right human eyes (about 65 mm), specifically about 130 to 150 mm. The eyebox EB is a range within which the driver can properly view the near virtual image 29 and the far virtual image 39, as described above. Therefore, when the line of sight toward the foreground is the eyepoint EP passing through the eyebox EB, the driver can visually recognize the near virtual image 29 and the far virtual image 39 in a perfect display state. On the other hand, if the line of sight toward the foreground is at an eyepoint EP that deviates from the eyebox EB, at least one of the near virtual image 29 and the far virtual image 39 suffers from a noticeable decrease in luminance, out-of-sight, and the like.

The near display area 62 is a space area in which the near virtual image 29 can be displayed. On the other hand, the far display area 63 is an area in space where the far virtual image 39 can be displayed. Both the near viewing zone 62 and the far viewing zone 63 are included in one imaging plane 60 of the HUD device 100 . The imaging plane 60 is an enlarged reflected image of the display surface 23 by the projection area PA and the magnifying optical element 40 . Therefore, the shape and orientation of the imaging plane 60 are defined by the shape and orientation of the display surface 23 and the like.

The imaging plane 60 is inclined to be closer to the horizontal plane than to the vertical plane. The imaging plane 60 is greatly inclined forward as it goes upward. An upper edge 60b and a lower edge 60a of the imaging plane 60 extend in the horizontal direction. The width of the imaging plane 60 increases upward due to the magnifying action of the magnifying optical element 40 . Therefore, the upper edge 60b is longer than the lower edge 60a (see FIG. 3, etc.).

On the imaging plane 60 , the distance from the windshield WS changes continuously from a near display area 62 to a far display area 63 . The near display area 62 is positioned below the imaging plane 60 and is defined in a range including the lower edge 60a. The far display area 63 is located above the imaging plane 60 and is defined to include the upper edge 60b. The area of the far display area 63 is larger than the area of the near display area 62 .

When the imaging plane 60 described above is viewed through the eyebox EB, the shape of the imaging plane 60 changes according to the position of the eyepoint EP in the horizontal direction. Specifically, when the imaging plane 60 is viewed from the center Ce of the eyebox EB, the distant top edge 60b is viewed shorter than the near bottom edge 60a due to perspective (see FIG. 4). Further, when the imaging plane 60 is viewed from the left end of the eyebox EB, the imaging plane 60 has a shape in which the far display area 63 is shifted to the left with respect to the near display area 62 compared to when viewed from the center Ce. It is visually recognized as being deformed (see FIG. 5). On the other hand, when the imaging plane 60 is viewed from the right end of the eyebox EB, the imaging plane 60 has a shape in which the far display area 63 is closer to the right side than the near display area 62 when viewed from the center Ce. It is visually recognized as being deformed (see FIG. 6).

In the HUD device 100, the near angle of view ωnc shown in FIG. 3 is made larger than the far angle of view ωfc on both the left and right sides as viewed from the eyebox EB. For the sake of detailed explanation, a virtual horizontal plane intersecting (perpendicular to) the eyebox EB is defined as a virtual plane VP. Then, the imaging plane 60 including the near display area 62 and the far display area 63 is projected onto the virtual plane VP along the direction orthogonal to the virtual plane VP, that is, along the vertical direction. A state in which the eyebox EB and the imaging plane 60 are thus projected onto the virtual plane VP is shown in FIG. A reference center line OLc, a far outer edge ray OLf, a near outer edge ray OLn, and an outer edge coupling line OLe are further defined on the above virtual plane VP.

The reference center line OLc is a virtual line connecting the center Ce of the eyebox EB and the center Cf of the far display area 63 on the virtual plane VP. The far edge ray OLf is a virtual line connecting the center Ce of the eyebox EB and the end 63e of the far display area 63 on the virtual plane VP. The near-outer edge ray OLn is a virtual line that connects the center Ce of the eyebox and the edge 62e of the near display area 62 on the virtual plane VP. The outer edge connecting line OLe is formed between the ends 63e and 61e of the far viewing area 63 and the eyebox EB that are on the same side (the left side in FIG. 3) with respect to the reference center line OLc on the virtual plane VP. is a virtual line connecting The outer edge coupling line OLe is a virtual line indicating the outermost edge of the optical path of the far display light 37 .

The above-described far angle of view ωfc and near angle of view ωnc can be further defined on the virtual plane VP. The far angle of view ωfc is the angle defined between the far edge ray OLf and the reference center line OLc. The far angle of view ωfc is half the total angle of view of the far display area 63 in the horizontal direction. The near angle of view ωnc is an angle defined between the near edge ray OLn and the reference centerline OLc. The near angle of view ωnc is half the full angle of view of the near display area 62 in the horizontal direction. An end portion 62e of the near display area 62 is positioned outside the far outer edge ray OLf, and more specifically, is positioned on the outer edge coupling line OLe. Therefore, the near angle of view ωnc has a larger value than the far angle of view ωfc.

The eyebox EB and the imaging plane 60 on the virtual plane VP are symmetrical with respect to the reference center line OLc. Therefore, the far outer edge ray OLf, the near outer edge ray OLn, and the outer edge coupling line OLe defined on the left side of the reference center line OLc in FIG. 3 may be defined on the right side of the reference center line OLc. Similarly, the far angle of view ωfc and the near angle of view ωnc may also be defined on the right side of the reference center line OLc.

In the HUD device 100 described so far, the physical sizes of the magnifying optical element 40, the dustproof cover 53, the projection window 51, etc. are set based on the optical path of the far display light 37. FIG. In particular, the size Sa of the dustproof cover 53 and the projection window 51 is determined so as not to block the optical path of the far display light 37 and to avoid the outer edge coupling line OLe indicating the outermost edge of the optical path.

尚、上記の数式（１）にて、アイボックス半値ＥＢｈは、上述のアイボックスＥＢにおける全幅の半分の値である。遠表示距離Ｌｆは、基準中心線ＯＬｃに沿ったアイボックスＥＢ及び上縁６０ｂ間の距離であり、近表示距離Ｌｎは、基準中心線ＯＬｃに沿ったアイボックスＥＢ及び下縁６０ａ間の距離である。 Therefore, if the near angle of view ωnc is the same as the far angle of view ωfc, an expansion allowance Wex is generated between the near display area 62 (the end of the lower edge 60a) and the outer edge coupling line OLe. This expansion margin Wex can be obtained by the following formula (1) based on the eyebox half value EBh, the far display distance Lf, and the near display distance Ln.

In the above formula (1), the eyebox half value EBh is a value that is half the full width of the eyebox EB. The far viewing distance Lf is the distance between the eyebox EB and the upper edge 60b along the reference centerline OLc, and the near viewing distance Ln is the distance between the eyebox EB and the lower edge 60a along the reference centerline OLc. be.

The half width Wb of the near display area 62 when the near field angle ωnc is assumed to be the same angle as the far field angle ωfc is calculated by the following formula (2).

As described above, the width Wn on one side of the near display area 62 can be increased up to the size shown in the following formula (3). That is, the near field angle ωnc can be made larger than the far field angle ωfc until one side of the near display area 62 is equal to or less than the horizontal width Wn. Also, the optical path of the near display light 27 can be accommodated within the optical path of the far display light 37 by increasing the near angle of view ωnc. Therefore, the display angle of view of the near display area 62 can be widened without changing the housing 50 , the dustproof cover 53 and the magnifying optical element 40 .

Such an effect of widening the display angle of view is shown in concrete numerical examples shown in FIG. In the numerical example of FIG. 7, as an example, the far display distance Lf is set to 15 m, and the near display distance Ln is set to 2 m. Furthermore, the width of the eyebox EB is set to 150 mm as described above.

When the horizontal angle of view of the far display area 63 (corresponding to twice the far angle of view ωfc) is 20°, the horizontal angle of view of the near display area 62 (corresponding to twice the near angle of view ωnc) is 23.6. °. Further, when the horizontal angle of view of the far display area 63 is 15°, the horizontal angle of view of the near display area 62 can be increased to 18.6°. Furthermore, when the horizontal angle of view of the far display area 63 is 12°, the horizontal angle of view of the near display area 62 can be increased to 15.7°. Similarly, when the horizontal angle of view of the far viewing area 63 is 10°, the horizontal viewing angle of the near viewing area 62 can be secured up to 13.7°, and when the horizontal viewing angle of the far viewing area 63 is 8°, The horizontal angle of view of the near display area 62 can be secured up to 11.7°.

As described above, in the first embodiment, since the near display area 62 is closer to the windshield WS than the far display area 63, the near display light 27 is is less likely to protrude from the optical path of the far display light 37 . Therefore, it is possible to widen the near display area 62 by ensuring that the near angle of view ωnc is larger than the far angle of view ωfc while maintaining the size of the housing 50 that defines the optical path. Therefore, the HUD device 100 capable of enlarging the display area of the virtual image while avoiding an increase in size is realized.

In addition, the end portion 62e of the near display area 62 in the first embodiment is positioned inside from the outer edge coupling line OLe. With such an optical design, the optical path of the near display light 27 can reliably fit within the optical path of the far display light 37 . Therefore, since there is no need to extend the optical path in the housing 50, it becomes more difficult for the HUD device 100 to become larger. Furthermore, by locating the end 62e of the near display area 62 on the outer edge coupling line OLe, the near display area 62 can be maximized within a range where expansion of the optical path can be avoided.

Further, in the first embodiment, since the near field angle ωnc along the horizontal plane is set larger than the far field angle ωfc along the horizontal plane, the near display area 62 can be expanded in the horizontal direction. According to the above, the HUD device 100 can utilize the widened near display area 62 and increase the amount of information presented by the near virtual image 29 .

Furthermore, in the first embodiment, the imaging plane 60 is defined such that the distance continuously changes from the near display area 62 to the far display area 63 . In such a configuration, one LCD projector 20 can be used to display both the near virtual image 29 and the far virtual image 39 . Therefore, the HUD device 100 can be made smaller than a form using separate displays for displaying the near virtual image 29 and the far virtual image 39 .

In addition, the imaging plane 60 in the first embodiment is inclined toward the horizontal plane rather than the vertical plane. Therefore, even if both the near display area 62 and the far display area 63 are included in the imaging plane 60, the distance difference between the far virtual image 39 and the near virtual image 29 can be secured. As a result, the extension margin Wex of the near display area 62 is also more likely to be secured (see formula (1)).

Further, in the first embodiment, the near display area 62 is arranged below the imaging plane 60 and the far display area 63 is arranged above the imaging plane 60 . Therefore, the HUD device 100 can AR-display the distant virtual image 39 in a range where the depression angle from the eye point EP is approximately zero, thereby presenting information to the driver in an easy-to-understand manner.

In the first embodiment, the windshield WS corresponds to the "projection member", the LCD projector 20 corresponds to the "display", the near display light 27 and the far display light 37 correspond to the "display light", The near virtual image 29 and the far virtual image 39 correspond to "virtual images".

(Second embodiment)
The second embodiment of the present disclosure, shown in FIGS. 8-12, is a modification of the first embodiment. As shown in FIGS. 8 and 9, the HUD device 200 according to the second embodiment includes a first projector 220 and a second projector 230 in addition to the configurations of the magnifying optical element 40, the display control circuit 90, the housing 50, and the like. I have. The first projector 220 and the second projector 230 are provided in the HUD device 200 as display devices replacing the LCD projector 20 (see FIG. 1) of the first embodiment, and are controlled by the display control circuit 90 .

The first projector 220 has a display surface 223 that displays the near display image 26 . The first projector 220 is positioned behind the convex mirror 41 and fixed to the housing 50 with the display surface 223 facing the concave mirror 42 . The first projector 220 is composed of an LCD panel 221 that forms a display surface 223, a backlight 222 that illuminates the display surface 223, and the like. The near display light 27 emitted from the display surface 223 is transmitted through the transmitting portion 41 a formed on the convex mirror 41 and enters the concave mirror 42 .

The second projector 230 has a display surface 233 that displays the far display image 36 . The second projector 230 is fixed to the housing 50 with the display surface 233 facing the convex mirror 41 . The second projector 230 is composed of an LCD panel 231 that forms a display surface 233, a backlight 232 that illuminates the display surface 233, and the like. The far display light 37 emitted from the display surface 233 is reflected by the convex reflecting surface of the convex mirror 41 and enters the concave mirror 42 .

As shown in FIGS. 8 and 10 , the near display area 62 in the HUD device 200 is an enlarged reflected image of the display surface 223 by the projection area PA and the enlargement optical element 40 . Similarly, the far display area 63 is an enlarged reflected image of the display surface 233 by the projection area PA and the magnifying optical element 40 . Therefore, the near display area 62 and the far display area 63 in the HUD device 200 are set at mutually independent positions in the foreground. The near display area 62 and the far display area 63 are in a vertical orientation along the eyebox EB.

In the HUD device 200 , the near display area 62 is positioned below and to the left with respect to the center of the far display area 63 . When viewed from the center Ce (see FIG. 11) of the eyebox EB, the near field angles .omega.nc1 and .omega.nc2 are set larger than the far field angles .omega.fc1 and .omega.fc2 on the left side and the bottom side (FIG. 11 and FIG. 11). 12). Therefore, the lower edge 62 a of the near display area 62 is visible below the lower edge 63 a of the far display area 63 . The left edge 62c of the near display area 62 is visible to the left of the left edge 63c of the far display area 63. FIG.

In the above configuration, a virtual horizontal plane and a vertical plane intersecting (perpendicular to) the eyebox EB are defined as a horizontal virtual plane VP1 and a vertical virtual plane VP2, respectively. A near display area 62 and a far display area 63 are projected onto the horizontal virtual plane VP1 along the vertical direction orthogonal to the horizontal virtual plane VP1. The projection view onto the horizontal virtual plane VP1 shown in FIG. 11 is substantially the same as the cross-sectional view of the cross section (see FIG. 10 VP1) including the near display area 62 and the far display area 63. FIG.

A reference center line OLc, a far outer edge ray OLf, a near outer edge ray OLn, and an outer edge coupling line OLe are defined on the horizontal virtual plane VP1 as in the first embodiment. In addition, a horizontal far angle of view ωfc1 is defined between the far outer edge ray OLf and the reference center line OLc, and a horizontal near angle of view is defined between the near outer edge ray OLn and the reference center line OLc. ωnc1 is defined. The near field angle ωnc1 in the horizontal direction has a larger value than the far field angle ωfc1. The near display area 62 makes maximum use of the horizontal expansion allowance Wex1, and positions the left end 62e on the outer edge connecting line OLe. Such a horizontal expansion margin Wex1 can be obtained by the following formula (4) based on the eyebox half value EBh1, the far display distance Lf and the near display distance Ln.

Furthermore, the near outer edge ray OLn1 passing through the right end 61e of the eyebox EB and the right end 62e of the near display area 62, and the left end 61e of the eyebox EB and the right of the near display area 62 A near-edge ray OLn2 passing through the other end 62e is further defined. Assuming that the intersection point between the near-edge ray OLn1 and the far display area 63 is a first intersection point P1, the far display area 63 on the left side of the first intersection point P1 is shielded by the near display area 62 and is invisible to the driver. Range VA0. Further, if the intersection point of the near-outer edge ray OLn2 and the far display area 63 is defined as a second intersection point P2, the area between the first intersection point P1 and the second intersection point P2 becomes a range VA1 that can be visually recognized only with one eye (the dot range in FIG. 10 see also). Then, the near display area 62 on the right side of the second intersection point P2 becomes the range VA2 that can be visually recognized with both eyes.

On the other hand, a near display area 62 and a far display area 63 are projected onto the vertical virtual plane VP2 along the horizontal direction orthogonal to the vertical virtual plane VP2. The projection view onto the vertical virtual plane VP2 shown in FIG. 12 is substantially the same as the cross-sectional view of the vertical cross section (see FIG. 10 VP2) including the near display area 62 and the far display area 63. FIG.

Similarly to the horizontal virtual plane VP1, a reference center line OLc, a far outer edge ray OLf, a near outer edge ray OLn, and an outer edge coupling line OLe are also defined on the vertical virtual plane VP2. The far edge ray OLf is a virtual line connecting the center Ce of the eyebox EB and the lower end 163e of the far display area 63 on the vertical virtual plane VP2. The near-edge ray OLn is a virtual line connecting the center Ce of the eyebox and the lower end 162e of the near display area 62 on the vertical virtual plane VP2. The outer edge connecting line OLe is an imaginary line that connects the lower ends 163e and 161e of the far viewing area 63 and the eyebox EB on the vertical imaginary plane VP2.

Further, a far angle of view ωfc2 in the vertical direction is defined between the far outer edge ray OLf and the reference center line OLc, and a near angle of view ωnc2 in the vertical direction is defined between the near outer edge ray OLn and the reference center line OLc. is defined. The near angle of view ωnc2 in the vertical direction is larger than the far angle of view ωfc2. The near display area 62 makes maximum use of the vertical expansion allowance Wex2, and positions the lower end 162e on the outer edge coupling line OLe. Such a vertical expansion margin Wex2 can be obtained by the following formula (5) based on the eyebox half value EBh2, the far display distance Lf, and the near display distance Ln.

In the second embodiment described so far, the same effects as in the first embodiment are obtained, and the near field angles ωnc1 and ωnc2 are secured larger than the far field angles ωfc1 and ωfc2, and the near display area 62 is vertically and horizontally can be expanded. Therefore, the HUD device 200 capable of enlarging the display area of the virtual image while avoiding an increase in size is realized.

In addition, in the second embodiment, on the horizontal virtual plane VP1, the center of the near display area 62 is shifted to the left with respect to the reference center line. The near angle of view ωnc1 on the left side of the reference center line OLc is made larger than the far angle of view ωfc1. Thus, with an optical configuration in which the center of the near display area 62 is shifted to a specific side with respect to the reference center line OLc, the far display area 63 can be viewed with both eyes without being hidden by the near display area 62. range VA2 is expanded. According to the above, good visibility can be ensured for a wider range of the enlarged display area.

Further, in the second embodiment, the near display area 62 is expanded not only in the left direction but also in the downward direction. By expanding the near display area 62 in two orthogonal directions, the display area of the near virtual image 29 can be further expanded.

Incidentally, in the second embodiment, the first projector 220 and the second projector 230 each correspond to a "display device". Also, the horizontal virtual plane VP1 and the vertical virtual plane VP2 each correspond to a "virtual plane".

(Third embodiment)
The third embodiment of the present disclosure, shown in FIGS. 13-16, is another variation of the first embodiment. The imaging plane 360 of the third embodiment includes both a near viewing zone 62 and a far viewing zone 63, as in the first embodiment. The imaging plane 360 also continuously changes in distance from the windshield from the near viewing area 62 to the far viewing area 63 . The imaging plane 360 has an inclined posture closer to the horizontal plane than the vertical plane, and is greatly inclined rearward as it goes upward. The width of the imaging plane 360 increases from the upper edge 60b toward the lower edge 60a. The near display area 62 is located above the imaging plane 360 and is defined in a range including the upper edge 60b. The far display area 63 is positioned below the imaging plane 360 and is defined to include the lower edge 60a.

When the imaging plane 360 is viewed from the center Ce of the eyebox EB, the upper edge 60b near the windshield is visible longer than the lower edge 60a (see FIG. 14). Also, when the imaging plane 360 is viewed from the left end of the eyebox EB, the imaging plane 360 is such that the lower far display area 63 is to the left of the upper near display area 62 than when viewed from the center Ce. It is visually recognized as deformed into a closer shape (see FIG. 15). On the other hand, when the image plane 360 is viewed from the right end of the eyebox EB, the image plane 360 is such that the lower far display area 63 is to the right of the upper near display area 62 than when viewed from the center Ce. It is visually recognized as deformed into a closer shape (see FIG. 16).

Even in the third embodiment described so far, the same effect as in the first embodiment is obtained, and while maintaining the size Sa of the dustproof cover and the projection window, etc. The angle of view ωnc can be ensured to be larger than the far angle of view ωfc. Therefore, a HUD device capable of enlarging the display area of a virtual image while avoiding an increase in size is realized.

In addition, in the third embodiment, the near display area 62 is arranged above the image plane 360 and the far display area 63 is arranged below the image plane 360 . Even with such an arrangement of the near display area 62 and the far display area 63, it is possible to present information to the driver in an easy-to-understand manner.

(Fourth embodiment)
A fourth embodiment of the present disclosure shown in FIGS. 17 and 18 is a modification of the second embodiment. In the fourth embodiment, the near display areas 62 for displaying the near virtual image 29 are separately set at two positions on the left and right. The two near display areas 62 are provided symmetrically with respect to the reference center line OLc. When viewed from the center Ce of the eyebox EB, one near display area 62 is positioned below and to the left with respect to the center of the far display area 63 . The other near display area 62 is positioned below and to the right with respect to the center of the far display area 63 . Therefore, the lower edge 62a of each near display area 62 is visible below the lower edge 63a of the far display area 63. As shown in FIG. In addition, the left edge 62c of the left near display area 62 is visible to the left of the left edge 63c of the far display area 63, and the right edge 62d of the right near display area 62 is visible to the right of the far display area 63. It is visually recognized to the right of 63d.

Two near display areas 62 and one far display area 63 are projected along the vertical direction on the horizontal virtual plane VP1 shown in FIG. In addition to the reference center line OLc, a pair of left and right far edge rays OLf, near edge rays OLn, OLn1, and OLn2, and an edge coupling line OLe are defined on the horizontal virtual plane VP1. In addition, a far angle of view ωfc1 and a near angle of view ωnc1 in the horizontal direction are defined on the left and right, respectively.

In the above optical configuration, the outer side of each first intersection point P1 in the far display area 63 becomes an invisible range VA0 shielded by each near display area 62 . Also, a range VA1 visible only with one eye is generated inside each near display area 62 and between each of the first intersection point P1 and the second intersection point P2 (see also the dot range in FIG. 17). The area between the two second intersections P2 is the range VA2 that can be visually recognized with both eyes.

In the fourth embodiment described so far, the left near display area 62 makes maximum use of the horizontal expansion margin Wex1 (see Equation (4)), and the left edge 62c (end 62e) is the left outer edge coupling It is extended to the left until it lies on line OLe. Similarly, the right near display area 62 is also expanded rightward by making maximum use of the horizontal expansion margin Wex1 until the right edge 62d (end 62e) is positioned on the right outer edge connecting line OLe. there is Furthermore, the two near display areas 62 are extended downward by making maximum use of the vertical extension margin Wex2 (see FIG. 12).

According to the above, the fourth embodiment has the same effects as the second embodiment, and each near angle of view ωnc1 is ensured to be larger than the far angle of view ωfc1 while maintaining the size Sa of the dustproof cover and the projection window. , the near viewing area 62 can be widened. Therefore, a HUD device capable of enlarging the display area of a virtual image while avoiding an increase in size is realized.

(Fifth embodiment)
A fifth embodiment of the present disclosure, shown in FIGS. 19 and 20, is a modification of the fourth embodiment. In the fifth embodiment, the near display area 62 displaying the near virtual image 29 is positioned below the far display area 63 when viewed from the center Ce of the eyebox EB. Specifically, the upper edge 62b of the near display area 62 is visible below the lower edge 63a of the far display area 63 . In addition, the left edge 62c of the near display area 62 is visible to the left of the left edge 63c of the far display area 63. FIG. Furthermore, the right edge 62 d of the near display area 62 is visible to the right of the right edge 63 d of the far display area 63 .

A near display area 62 and a far display area 63 are projected along the vertical direction on the horizontal virtual plane VP1 shown in FIG. In addition to the reference center line OLc, a pair of left and right far edge rays OLf, near edge rays OLn, and an edge coupling line OLe are defined on the horizontal virtual plane VP1. In addition, a far angle of view ωfc1 and a near angle of view ωnc1 in the horizontal direction are defined on the left and right, respectively.

The near display area 62 of the fifth embodiment described so far makes maximum use of the horizontal expansion margin Wex1 (see formula (4)) on both the left and right sides, and the left edge 62c and the right edge 62d (each end 62e) are located on the left and right outer edge coupling lines OLe. Therefore, the same effect as in the fourth embodiment is obtained, and the near display area 62 is secured by ensuring the left and right near angle of view ωnc1 to be larger than the far angle of view ωfc1 while maintaining the size Sa of the dustproof cover and the projection window. can be expanded. Therefore, a HUD device capable of enlarging the display area of a virtual image while avoiding an increase in size is realized.

(Other embodiments)
A plurality of embodiments of the present disclosure have been described above, but the present disclosure is not to be construed as being limited to the above embodiments, and can be applied to various embodiments and combinations within the scope of the present disclosure. can do.

In Modified Example 1 of the second embodiment shown in FIG. 21, downward expansion of the near display area 62 using the vertical expansion margin Wex2 (see FIG. 12) is not performed. Therefore, when the near virtual image 29 and the far virtual image 39 are viewed from the center of the eyebox, the position of the lower edge 62a of the near display area 62 and the position of the lower edge 63a of the far display area 63 in the vertical direction generally match.

On the other hand, also in Modification 1, the near angle of view ωnc1 on the horizontal virtual plane VP1 is made larger than the far angle of view ωfc (see FIG. 11). Therefore, the near display area 62 is expanded to the left using the horizontal expansion margin Wex1 (see FIG. 11), so that the left edge 62c ( The end 62e) is positioned.

In the modification 2 of the fourth embodiment shown in FIG. 22 as well, downward expansion of each near display area 62 using the vertical expansion allowance Wex2 (see FIG. 12) is not performed. Therefore, when the near virtual image 29 and the far virtual image 39 are visually recognized from the center of the eyebox, the position of the lower edge 62a of each near display area 62 substantially matches the position of the lower edge 63a of the far display area 63 .

On the other hand, also in Modification 2, the near angle of view ωnc1 on the horizontal virtual plane VP1 is made larger than the far angle of view ωfc on both the left and right sides (see FIG. 18). Therefore, the left near display area 62 is extended to the left side using the horizontal extension margin Wex1 (see FIG. 18), and the left edge 62c (end 62e) is positioned. Similarly, the right near display area 62 is also expanded to the right using the expansion margin Wex1, so that the right edge 62d (end 62e) of the far display area 63 is positioned to the right of the right edge 63d (end 63e). are positioned.

In Modified Example 3 of the fifth embodiment shown in FIG. 23, the near display area 62 is expanded to both the left and right sides by making maximum use of the horizontal expansion margin Wex1 (see FIG. 20). In addition, in Modification 3, the near display area 62 is expanded downward using only a portion of the vertical expansion margin Wex2 (see FIG. 12). That is, the lower end portion 162e of the near display area 62 on the vertical virtual plane VP2 is positioned outside (below) the far outer edge ray OLf and inside (upper) the outer edge coupling line OLe ( See Figure 12). As described above, when the near virtual image 29 and the far virtual image 39 are viewed from the center of the eyebox, the upper edge 62b of the near display area 62 is located slightly above the lower edge 63a of the far display area 63. FIG.

In the modification 4 of the fifth embodiment shown in FIG. 24, the horizontal expansion of the near display area 62 using the horizontal expansion margin Wex1 (see FIG. 20) is not performed. Therefore, when the near virtual image 29 and the far virtual image 39 are visually recognized from the center of the eyebox, the positions of the left edge 62c and the right edge 62d of the near display area 62 are higher than the left edge 63c and the right edge 63d of the far display area 63, respectively. located inside.

On the other hand, in Modification 4, the vertical extension margin Wex2 (see FIG. 12) is partially used, and the near display area 62 is extended downward. In Modified Example 4, as in Modified Example 3, the lower end portion 162e of the near display area 62 on the vertical virtual plane VP2 is outside (below) the far outer edge ray OLf, and is located on the outer edge coupling line OLe. It is located inside (upper side) (see FIG. 12). Therefore, the upper edge 62 b of the near display area 62 is positioned slightly above the lower edge 63 a of the far display area 63 .

In modifications 5 and 6 of the second embodiment shown in FIGS. 25 and 26, the near display area 62 is positioned above and to the left with respect to the center of the far display area 63 . In Modified Example 5 shown in FIG. 25, the expansion margin in the vertical direction is used to expand the near display area 62 upward. That is, the upper end 162e of the near display area 62 on the vertical virtual plane VP2 is positioned outside (upper) the far outer edge ray and inside (lower) the outer edge coupling line. Therefore, when the near virtual image 29 and the far virtual image 39 are viewed from the center of the eyebox, the upper edge 62b of the near display area 62 is located above the upper edge 63b of the far display area 63. FIG.

On the other hand, in Modification 6 shown in FIG. 26, unlike Modification 5, the near display area 62 is not expanded upward using the vertical expansion allowance. Therefore, when the near virtual image 29 and the far virtual image 39 are visually recognized from the center of the eyebox, the position of the upper edge 62b of the near display area 62 substantially matches the position of the upper edge 63b of the far display area 63 . Note that the near display area 62 of Modifications 5 and 6 is expanded to the left using a horizontal expansion margin, so that the left edge 62c is positioned to the left of the left edge 63c of the far display area 63. FIG.

In modifications 7 and 8 of the fourth embodiment shown in FIGS. 27 and 28, the two near display areas 62 separately provided on the left and right sides are arranged above the center of the far display area 63. located in In Modification 7 shown in FIG. 27, the expansion margin in the vertical direction is used to expand each near display area 62 upward. Therefore, when the near virtual image 29 and the far virtual image 39 are viewed from the center of the eyebox, the upper edge 62b of each near display area 62 is located above the upper edge 63b of the far display area 63. FIG.

On the other hand, in Modification 8 shown in FIG. 28, unlike Modification 7, each near display area 62 is not expanded upward using the vertical expansion allowance. Therefore, when the near virtual image 29 and the far virtual image 39 are visually recognized from the center of the eyebox, the position of the upper edge 62b of each near display area 62 and the position of the upper edge 63b of the far display area 63 substantially match. In Modifications 7 and 8, each left near display area 62 is expanded leftward using a horizontal expansion margin, so that the left edge 62c is positioned to the left of the left edge 63c of the far display area 63. are positioned. Similarly, each right near viewing zone 62 has right edge 62d located to the right of right edge 63d of far viewing zone 63 by rightward expansion using a horizontal expansion margin.

In another modified example 9 of the fifth embodiment shown in FIG. 29 as well, the near display area 62 is positioned above the center of the far display area 63 . In Modification 9, the near display area 62 is expanded upward using at least part of the vertical expansion margin. Therefore, the upper edge 62b of the near display area 62 is located above the upper edge 63b of the far display area 63. As shown in FIG. Further, in the ninth modification, the near display area 62 is expanded to both the left and right sides by making maximum use of the expansion margin in the horizontal direction. Therefore, the left edge 62c and the right edge 62d of the near display area 62 are positioned outside the left and right edges 63c and 63d of the far display area 63, respectively.

The specific configuration of the display (projector) of the HUD device that displays the virtual image in the air may be changed as appropriate. For example, the HUD device of Modification 10 is provided with an EL (Electro Luminescence) panel instead of the LCD and the backlight. Furthermore, instead of the EL panel, a projector using a display device such as a plasma display panel, a cathode ray tube, and an LED can be used for the HUD.

Further, the HUD device of Modification 11 is provided with a laser module (hereinafter "LSM") and a screen instead of the LCD and backlight. The LSM has a configuration including, for example, a laser light source and a MEMS (Micro Electro Mechanical Systems) scanner. The screen is for example a micromirror array or a microlens array. In the HUD device of Modification 11, a display image is drawn on the screen by scanning laser light emitted from the LSM. A HUD device projects a display image drawn on a screen onto a windshield using a magnifying optical element to display a virtual image in mid-air.

Further, the HUD device of Modification 12 is provided with a DLP (Digital Light Processing, registered trademark) projector. A DLP projector has a digital mirror device (hereinafter “DMD”) provided with a large number of micromirrors and a projection light source that projects light toward the DMD. A DLP projector renders a display image on a screen through coordinated control of the DMD and the projection light source. Furthermore, the HUD device of Modification 13 employs a projector using LCOS (Liquid Crystal On Silicon).

The virtual planes in the above embodiments were defined along the horizontal or vertical direction. However, the orientation of the virtual plane may be slightly inclined with respect to the horizontal or vertical direction. Even in this case, it is desirable that the near display area and the far display area are projected in the direction perpendicular to the virtual plane. Also, if the eyebox is defined to be a three-dimensional shape, a virtual plane is defined to intersect its front surface.

The near display light and the far display light may be projected onto an in-vehicle configuration separate from the windshield. For example, a combiner provided separately from the windshield can be employed as the projection member. Also, the imaging plane containing both the near and far display areas may be in a vertical orientation along the eyebox.

The HUD device may be mounted as a display on mobile objects other than vehicles, such as ships, aircraft, and transportation equipment. In addition, the virtual image display by the HUD device may be viewed by passengers other than the driver. Furthermore, the HUD device may be mounted on a non-moving object such as an amusement machine installed in a leisure facility or the like, and used to display images of attractions, games, and the like.

Ce center of eye box, Cf center of far view area, EB eye box, OLc reference center line, OLe outer edge coupling line, OLf far outer edge ray, OLn near outer edge ray, VP virtual plane, VP1 horizontal virtual plane (virtual plane), VP2 vertical virtual plane (virtual plane), WS windshield (projection member), ωfc, ωfc1, ωfc2 far angle of view, ωnc, ωnc1, ωnc2 near angle of view, 20 LCD projector (display), 220 first projector (display) ), 230 second projector (display), 27 near display light (display light), 29 near virtual image (virtual image), 37 far display light (display light), 39 far virtual image (virtual image), 50 housing, 60,360 Imaging plane 62 near display area 62e, 162e end 63 far display area 63e, 163e end 100, 200 HUD device (head-up display device)

Claims (10)

Projecting display light (27, 37) onto the projection member (WS) and visible from the eyebox (EB) into a far viewing zone (63) and a near viewing zone (62) at different distances from said projection member. A head-up display device that displays virtual images (29, 39) of the display light,
At least one display that emits , as the display light, near display light of a near display image (26) formed in the near display area and far display light of a far display image formed in the far display area. a vessel (20, 220, 230);
an enlarging optical element (40) projecting the near display light and the far display light emitted from the display onto the projection member while widening them by reflection, and defining the near display area and the far display area together with the projection member; When,
A projection window (51) is formed on an upper surface located below the projection member, and accommodates the display and the magnifying optical element , and the near display light and the far display light emitted from the display are a housing (50) in which an optical path is defined inside until it is emitted toward the projection member through the magnifying optical element ;
The projection window has a size that does not block the optical path of the far display light,
The magnifying optical element and the display have a near view angle (ωnc , ωnc1, ωnc2) larger than the far field angle (ωfc, ωfc1, ωfc2) of the far display area. projecting the far viewing area and the near viewing area onto a virtual plane (VP, VP1, VP2) that intersects with the eyebox, and projecting the center (Ce) of the eyebox and the center of the far viewing area on the virtual plane; (Cf) is defined as a reference center line (OLc); Assuming that the virtual line connecting the center of the box and the ends (63e, 163e) of the near display area is the near outer edge ray (OLn),
The magnifying optical element and the display adjust the near angle of view defined between the near peripheral ray and the reference center line to the far angle defined between the far peripheral ray and the reference center line. The head-up display device according to claim 1, wherein the angle of view is larger than the angle of view. If, on the virtual plane, an outer edge connecting line (OLe) is a virtual line that connects the ends of the far viewing area and the eyebox that are on the same side with respect to the reference center line,
3. The head-up display according to claim 2, wherein the magnifying optical element and the display position the end of the near display area outside the far edge ray and inside from the edge coupling line. Device. The magnifying optical element and the indicator are
Positioning the center of the near display area on the virtual plane so as to be shifted to a specific side with respect to the reference center line;
The head-up display device according to claim 2 or 3, wherein the near angle of view on the specific side of the reference center line is made larger than the far angle of view. the virtual plane is a horizontal plane on which the far display area and the near display area are projected in a vertical direction;
The head-up display device according to any one of claims 2 to 4, wherein the magnifying optical element and the display make the near angle of view along the horizontal plane larger than the far angle of view. the virtual plane is a vertical plane on which the far display area and the near display area are projected in a horizontal direction;
The head-up display device according to any one of claims 2 to 4, wherein the magnifying optical element and the display make the near angle of view along the vertical plane larger than the far angle of view. 7. A display according to any preceding claim, wherein said display defines an imaging plane (60, 360) whose distance from said projection member varies continuously from said near viewing zone to said far viewing zone. A head-up display device as described. 8. The head-up display device according to claim 7, wherein the imaging plane has an inclined posture closer to the horizontal plane than to the vertical plane. The head-up display device according to claim 7 or 8, wherein the near display area is located below the imaging plane. The head-up display device according to claim 7 or 8, wherein the near display area is located above the imaging plane.

Images