JP4033069B2 - Head-up display device for vehicle - Google Patents

Description

  The present invention relates to a head-up display device for a vehicle, and is suitable for use in, for example, an automobile.

  In the conventional vehicle head-up display device, the inner surface of the windshield is reflected through the opening provided in the dashboard by reflecting the display light emitted from the display device that is arranged in the dashboard and forms a display image. Is incident on a combiner deposited on Then, the display light incident on and reflected by the combiner travels in the direction of the driver's eyes, and a virtual image of the display image is formed in front of the windshield, and the driver visually recognizes the virtual image of the display image ( For example, see Patent Document 1).

  This makes it possible to improve visibility by reducing the line-of-sight movement angle for the driver to visually recognize the vehicle information when looking closely ahead of the vehicle as compared with the case where the vehicle information is displayed in the vehicle interior.

The virtual image of the display image is formed at a position separated from the driver's eye in front of the windshield by a predetermined distance. Here, the predetermined distance is a distance that allows quick adjustment of the focal distance of the eye when the line of sight of the driver's gaze while moving the vehicle moves from a far distance to a virtual image. Is about 1 meter to several meters.
Utility Model Registration No. 2527716

  However, in the conventional vehicle head-up display device configured as described above, the range of the eye position where the virtual image can be visually recognized is limited to the driver's seat, in other words, it is set to a range where only the driver can visually recognize it. Has been. Therefore, it is impossible for the passenger except the driver, that is, the passenger sitting on the passenger seat or the rear seat to visually recognize the display image.

  By the way, there is a demand for making it possible for a passenger other than the driver to see a display image by the vehicle head-up display device.

  As a method for making the display image by the vehicle head-up display device visible to passengers other than the driver, for example, the combiner is enlarged and the virtual image of the display image formed in front of the windshield is enlarged. Can be considered.

  However, according to this method, it is necessary to enlarge the opening provided in the dashboard, which is practically difficult to achieve.

  As another method, it is conceivable to enlarge the range of the eye position where the virtual image of the display image can be visually recognized.

  However, according to this method, the imaging position of the virtual image approaches the driver, and it becomes difficult to ensure good visibility by the driver.

  Therefore, the present invention has been made in view of the above problems, and has been devised in terms of the arrangement of optical system parts, i.e., reflectors, etc., so that a display image can be visually recognized by a passenger other than the driver with a simple configuration, and is novel. An object of the present invention is to provide a vehicle head-up display device with a good appearance.

  The present invention employs the following technical means to achieve the above object.

According to a first aspect of the present invention, there is provided a vehicle head-up display device which is disposed in a dashboard, forms display information as a display image, and emits the display image to the outside as display light, and is formed on the dashboard. The first reflecting member that reflects the display light emitted from the display in the direction of the opening, and the display light that is reflected by the first reflecting member and enters through the opening in the direction of the eyes of the driver A second reflecting member that reflects, and a third reflecting member that is different from the second reflecting member that reflects the display light reflected by the first reflecting member and incident through the opening toward the eyes of the occupant excluding the driver. The driver can visually recognize a virtual image of the display image formed on the opposite side of the driver of the second reflecting member by the display light reflected by the second reflecting member and incident on the eyes of the driver. Crew other than the driver are reflected by the third reflecting member. It has a structure which is visible a virtual image of the display image formed on the occupant side opposite excluding the driver of the third reflection member by the display light incident on the occupant's eyes other than persons.

  As a result, the driver can visually recognize a virtual image of the display image formed in front of the front windshield (front glass), as in the case of the conventional vehicle head-up display device. Furthermore, a passenger other than the driver can also visually recognize a virtual image of the display image formed in front of the front windshield by the third reflecting member. That is, both the driver and the passenger can view the display image on the display. Therefore, a head-up display device for a vehicle with a novel appearance can be realized.

  In this case, by appropriately selecting the shape of the third reflecting member, the size of the virtual image of the display image formed in front of the front windshield by the third reflecting member is made larger than the display image on the display. Can do. Accordingly, it is possible to improve the visibility of the display image by the occupant excluding the driver.

According to a third aspect of the present invention, there is provided a vehicle head-up display device which is disposed in a dashboard, forms display information as a display image, and emits the display image to the outside as display light, and is formed on the dashboard. A first reflecting member that reflects the display light emitted from the display in the direction of the opening, and a first reflecting member that reflects the display light emitted from the display in the direction of the opening . A fourth reflecting member, a second reflecting member that reflects the display light reflected by the first reflecting member and incident through the opening in the direction of the driver's eyes, and is reflected by the fourth reflecting member and enters through the opening. A fifth reflecting member different from the second reflecting member that reflects the display light in the direction of the occupant's eyes excluding the driver is provided, and the driver is reflected by the second reflecting member and enters the eyes of the driver. An image is formed on the side opposite to the driver of the second reflecting member by the display light. The occupant other than the driver can visually recognize the virtual image of the display image, and the occupant excluding the driver of the fifth reflecting member by the display light reflected by the fifth reflecting member and incident on the eyes of the occupant other than the driver. The virtual image of the display image formed on the opposite side of the display is visible.

  As a result, the driver can visually recognize a virtual image of the display image formed in front of the front windshield (front glass), as in the case of the conventional vehicle head-up display device. Furthermore, a passenger other than the driver can also visually recognize a virtual image of the display image formed in front of the front windshield by the fifth reflecting member. That is, both the driver and the passenger can view the display image on the display. Therefore, a head-up display device for a vehicle with a novel appearance can be realized.

  In this case, by appropriately selecting the shape of the fifth reflecting member, the size of the virtual image of the display image formed in front of the front windshield by the fifth reflecting member is made larger than the display image on the display. Can do. Accordingly, it is possible to improve the visibility of the display image by the occupant excluding the driver.

  Hereinafter, a case where a vehicle head-up display device according to the present invention is applied to a head-up display device mounted on an automobile will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an overall configuration diagram of a head-up display device 1 according to a first embodiment of the present invention. In FIG. 1, the vertical direction is the front-rear direction of the automobile, and the left-right direction is the left-right direction of the automobile. FIG. 1 shows the case of a right-hand drive vehicle.

  FIG. 2 is a cross-sectional view of the head-up display device 1 according to the first embodiment of the present invention, and is a cross-sectional view taken along the line II-II in FIG. In FIG. 2, the vertical direction is the vertical direction of the automobile, and the horizontal direction is the longitudinal direction of the automobile.

  As shown in FIG. 1, the head-up display device 1 includes a liquid crystal panel 2 that is a display device disposed in the dashboard 5, that is, below the dashboard 5, and an opening 6 formed in the dashboard 5. The reflection mirror 3 that is the first reflection member that reflects the display light emitted from the liquid crystal panel 2 toward the opening 6 and the display light that is reflected by the reflection mirror 3 and incident through the opening 6 are supplied to the driver D. The reflecting mirror 4 is a second reflecting member that reflects in the direction of the eyes.

  In addition, the liquid crystal panel 2, the reflecting mirror 3, and the reflecting mirror 4 are held and fixed in a case 8 disposed on the lower side of the dashboard 5, as shown in FIG.

  The liquid crystal panel 2 forms various information necessary for driving the vehicle as a display image, and transmits and illuminates the display image with light emitted from a backlight (not shown) that is a built-in light source and emits the display image as display light. ing.

  The reflecting mirror 3 is attached to the case 8 at a predetermined angle so that display light from the liquid crystal panel 2 can enter the reflecting mirror 4 through the opening 6 of the dashboard 5.

  The reflecting mirror 4 is attached to the case 8 at a predetermined angle so that the display light from the liquid crystal panel 2 incident through the reflecting mirror 3 and the opening 6 can be incident on the eyes of the driver D.

  As shown in FIG. 2, the reflecting mirror 4 is supported and fixed to the case 8 via the center pin 9, and can be rotated around the center pin 9. That is, in FIG. 2, since it can rotate on the paper surface, when the head-up display device 1 is not used, the reflecting mirror 4 is rotated clockwise around the center pin 9 to open the dashboard 5. It is possible to store in the portion 6 and make the upper surface of the dashboard 5 substantially flat. Thereby, when the head-up display device 1 is not used, protrusions can be eliminated from the upper surface of the dashboard 5 to improve the appearance around the dashboard 5.

  Next, the visibility of the head-up display device 1 according to the first embodiment of the present invention will be described.

  As shown in the optical path A in FIG. 1, the driver D transfers the display image of the liquid crystal panel 2 through the reflecting mirror 3, the opening 6 of the dashboard 5, and the reflecting mirror 4. It is visually recognized as a virtual image Id formed on the opposite side.

  By the way, in the head-up display device 1 according to the first embodiment of the present invention, as shown in FIG. 1, the display surface 2a of the liquid crystal panel 2 is disposed so as to face the passenger seat occupant P and the shape of the opening 6 is formed. The passenger seat passenger P is set so that the display surface 2a of the liquid crystal panel 2 can be visually recognized.

  As a result, the passenger seat passenger P who is a passenger other than the driver directly visually recognizes the display surface 2a of the liquid crystal panel 2 through the opening 6 of the dashboard 5 as shown in the optical path B in FIG. be able to.

  Therefore, in the head-up display device 1 according to the first embodiment of the present invention, a passenger other than the driver D, for example, the passenger seat passenger P, can also visually recognize the display image on the display surface 2a of the liquid crystal panel 2, and is novel. The head-up display device 1 that looks good can be realized.

  Further, in the head-up display device 1 according to the first embodiment of the present invention, the arrangement of the liquid crystal panel 2 and the shape of the opening 6 of the dashboard 5 are simply set as appropriate without significant changes such as addition of components. By doing so, a structure in which the passenger occupant P can visually recognize the liquid crystal panel 2 is realized. Accordingly, it is possible to realize the head-up display device 1 with a novel appearance while suppressing an increase in cost.

  In addition, in the head-up display device 1 according to the first embodiment of the present invention described above, if a concave mirror is used as the reflecting mirror 4, the virtual image Id of the display image of the liquid crystal panel 2 is enlarged and visually recognized by the driver D. Can do.

  Further, in the head-up display device 1 according to the first embodiment of the present invention described above, for example, a convex lens is used as an image enlarging means in the middle of the optical path B when the passenger seat occupant P visually recognizes the display image of the liquid crystal panel 2. And the like, the display image of the liquid crystal panel 2 can be enlarged and made visible to the passenger seat occupant P.

  Further, in the head-up display device 1 according to the first embodiment of the present invention described above, the layout of the liquid crystal panel 2, that is, the orientation of the display surface 2a and the shape of the opening 6 of the dashboard 5 are appropriately set to help the assistant. The display surface 2a of the liquid crystal panel 2 may be visible not only from the seat occupant P but also from other passengers such as a rear seat occupant (not shown).

  FIG. 3 shows a cross-sectional view of a modified example of the head-up display device 1 according to the first embodiment of the present invention.

  In the modification of the head-up display device 1 according to the first embodiment of the present invention, the front windshield 7 functions as the second reflecting member instead of the reflecting mirror 4.

In this case, a coating (not shown) is applied to a region of the inner surface 7a of the front windshield 7 where at least display light reflected by the reflecting mirror 3 is incident. This coating is formed by evaporating, for example, SiO ₂ or TiO ₂ , and increases the reflectivity of the inner surface 7a of the front windshield 7 so that the driver D can visually recognize the virtual image Id more clearly.

  Also in this modification, as in the case of the head-up display device 1 according to the first embodiment, the display surface 2a of the liquid crystal panel 2 is arranged to face the passenger seat occupant P and the shape of the opening 6 is changed to the passenger seat occupant. If P is set so that the display surface 2a of the liquid crystal panel 2 is visible, the passenger seat passenger P can make the liquid crystal panel 2 visible. Accordingly, it is possible to realize the head-up display device 1 with a novel appearance while suppressing an increase in cost.

  Moreover, according to this modification, since the reflecting mirror 4 is required, the number of components of the head-up display device 1 can be reduced.

  FIG. 4 shows a partial sectional view of another modification of the head-up display device 1 according to the first embodiment of the present invention. 4 is a cross-sectional view taken along line IV-IV in FIG. In FIG. 1, the direction of the IV-IV line is substantially parallel to the visual light path B by the passenger on the passenger seat P.

  In another modification, as shown in FIG. 4, a slope 5 a is formed on the dashboard 5 so as to approach the lower surface 5 b of the dashboard 5 as it approaches the opening 6. Further, the slope 5 a is formed on a portion of the dashboard 5 including at least the entire passing range of the optical path B where the passenger seat passenger P visually recognizes the display surface 2 a of the liquid crystal panel 2.

  Thereby, the visibility of the display surface 2a of the liquid crystal panel 2 by the passenger seat passenger P can be improved.

(Second Embodiment)
Next, a head-up display device 1 according to a second embodiment of the invention will be described.

  FIG. 5 is an overall configuration diagram of the head-up display device 1 according to the second embodiment of the present invention. In FIG. 5, the vertical direction is the front-rear direction of the automobile, and the left-right direction is the left-right direction of the automobile. FIG. 5 shows the case of a right-hand drive vehicle.

  In the combination meter 1 according to the second embodiment of the present invention, as shown in FIG. 5, the display light reflected by the reflecting mirror 3 and incident through the opening 6 with respect to the head-up display device 1 according to the first embodiment. Is provided with a reflecting mirror 10 that is a third reflecting member that reflects the eye in the direction of the eyes of the passenger seat passenger P who is an occupant other than the driver.

  In the combination meter 1 according to the second embodiment, as shown by the optical path A in FIG. 5, the driver D displays the display image of the liquid crystal panel 2 on the reflecting mirror 3, the opening 6 of the dashboard 5, and the reflecting mirror 4. Then, it is visually recognized as a virtual image Id formed on the side opposite to the driver D of the reflecting mirror 6.

  On the other hand, a passenger in the passenger seat P who is a passenger other than the driver displays the display image of the liquid crystal panel 2 on the reflecting mirror 3, the opening 6 of the dashboard 5, and the reflecting mirror 10 as shown by an optical path C in FIG. The virtual image Ip formed on the opposite side of the reflecting mirror 10 from the driver D is visually recognized.

  That is, in the combination meter 1 according to the second embodiment, the passenger seat occupant P also visually recognizes the display image of the liquid crystal panel 2 as the virtual image Ip.

  Thereby, in the combination meter 1 by 2nd Embodiment of this invention, the structure which the passenger-seat passenger | crew P can visually recognize the liquid crystal panel 2 is implement | achieved by the simple means of additionally installing the reflective mirror 10. FIG. Accordingly, it is possible to realize the head-up display device 1 with a novel appearance while suppressing an increase in cost.

  In the head-up display device 1 according to the second embodiment of the present invention described above, if a concave mirror is used as the reflecting mirror 4, the virtual image Id of the display image of the liquid crystal panel 2 is enlarged and visually recognized by the driver D. be able to. Furthermore, if the reflecting mirror 10 is formed of a concave mirror, the virtual image Ip visually recognized by the passenger seat passenger P can be enlarged. That is, in general, the liquid crystal panel 2 is small enough to be stored in the dashboard 5, and when viewed directly, the screen may be small and difficult to see. However, the passenger 10 This can be solved by enlarging the virtual image Ip to be visually recognized.

  In the head-up display device 1 according to the second embodiment of the present invention described above, the reflecting mirror 3 reflects the display light from the liquid crystal panel 2 toward both the reflecting mirror 4 and the reflecting mirror 10. Yes. On the other hand, the reflecting mirror 3 is arranged so as to reflect the display light from the liquid crystal panel 2 toward only the reflecting mirror 4, and a new reflecting mirror is provided to reflect the display light from the liquid crystal panel 2. You may arrange | position so that it may reflect toward only the mirror 10. FIG.

  Further, in the head-up display device 1 according to the second embodiment of the present invention described above, instead of the reflecting mirror 4 as in the modification of the head-up display device 1 according to the first embodiment of the present invention. The front windshield 7 may function as the second reflecting member.

  In this case, a configuration in which not only the reflecting mirror 4 but also the reflecting mirror 10 is also used as the front windshield 7 may be adopted.

1 is an overall configuration diagram of a head-up display device 1 according to a first embodiment of the present invention. It is sectional drawing of the head-up display apparatus 1 by 1st Embodiment of this invention, and is the II-II sectional view taken on the line in FIG. FIG. 6 is a cross-sectional view of a modified example of the head-up display device 1 according to the first embodiment of the present invention. It is a fragmentary sectional view by the other modification of the head-up display apparatus 1 by 1st Embodiment of this invention, and is the IV-IV sectional view taken on the line in FIG. It is a whole block diagram of the combination meter 1 by 2nd Embodiment of this invention.

Explanation of symbols

1. Head-up display device (vehicle head-up display device)
2 Liquid crystal panel (display)
3 Reflective mirror (first reflective member)
4 Reflecting mirror (second reflecting member)
5 dashboard 5a slope 5b back surface 6 opening 7 front windshield 7a inner surface 8 case 9 center pin 10 reflecting mirror (third reflecting member)
A Light path B Light path D Driver Id Driver's side virtual image Ip Passenger side virtual image P Passenger seat passenger (passenger other than driver)

Claims (5)

A display that is arranged in the dashboard and forms display information as a display image and emits the display image as display light to the outside;
An opening formed in the dashboard;
A first reflecting member that reflects the display light emitted from the display in the direction of the opening;
A second reflecting member that reflects the display light reflected by the first reflecting member and incident through the opening in the direction of the driver's eyes;
A third reflecting member different from the second reflecting member that reflects the display light reflected by the first reflecting member and incident through the opening in the direction of the eyes of an occupant excluding the driver;
The driver can visually recognize a virtual image of the display image formed on the side opposite to the driver of the second reflecting member by the display light reflected by the second reflecting member and incident on the eyes of the driver. With
The occupant other than the driver is imaged on the opposite side to the occupant excluding the driver of the third reflecting member by the display light reflected by the third reflecting member and incident on the eyes of the occupant other than the driver. A vehicle head-up display device, wherein a virtual image of a display image is visible. 2. The vehicle head-up display device according to claim 1, wherein the third reflecting member is disposed closer to the passenger seat side in the left-right direction of the vehicle than the second reflecting member . A display that is arranged in the dashboard and forms display information as a display image and emits the display image as display light to the outside;
An opening formed in the dashboard;
A first reflecting member that reflects the display light emitted from the display in the direction of the opening;
A fourth reflecting member different from the first reflecting member that reflects the display light emitted from the display in the direction of the opening;
A second reflecting member that reflects the display light reflected by the first reflecting member and incident through the opening in the direction of the driver's eyes;
A fifth reflecting member different from the second reflecting member that reflects the display light reflected by the fourth reflecting member and incident through the opening in the direction of the eyes of the occupant excluding the driver,
The driver can visually recognize a virtual image of the display image formed on the side opposite to the driver of the second reflecting member by the display light reflected by the second reflecting member and incident on the eyes of the driver. With
The occupant other than the driver is imaged on the side opposite to the occupant except the driver of the fifth reflecting member by the display light reflected by the fifth reflecting member and incident on the eyes of the occupant other than the driver. A vehicle head-up display device, wherein a virtual image of a display image is visible. 4. The vehicle head-up display device according to claim 3, wherein the fifth reflecting member is disposed closer to the passenger seat side in the left-right direction of the vehicle than the second reflecting member . The vehicle head-up display device according to any one of claims 1 to 4, wherein the second reflecting member is a concave mirror .

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