JP2016132360A - Vehicular head-up display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a complex guide route in an easy-to-see manner using a display unit formed with plural stationary segments.SOLUTION: Projection light 45 projected to ahead of a driver 80 from a segment type display unit 40 (display unit) including a guide route display segment 31 formed with a first display segment 36 which indicates the position of an intersection, plural second display segments 34 surrounding the first display segment 36, and plural third display segments 32 which are disposed on the perimeter of the plural second display segments 34 and indicate directions of escaping from the current position of a vehicle 10 and the intersection is reflected from a combiner 50 (reflective member) in order to display a guide route at the intersection as a virtual image 55.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle head-up display device that displays a necessary information by forming a virtual image in front of a driver.

  Recently, a vehicle head that projects a display image on a windshield of a vehicle, forms a virtual image in front of the driver, and can visually recognize the display image without dropping the line of sight even during driving. Up-display devices have been put into practical use (for example, Patent Document 1).

  For example, in the vehicle head-up display device described in Patent Document 1, the guidance route is displayed using a display device including a plurality of fixed segments.

Utility Model Registration No. 3144033

  However, in the vehicle head-up display device described in Patent Document 1, the guide route that can be displayed is limited to the most recent route change location. For this reason, it has been impossible to display a complicated guide route in which the next course change occurs immediately after the most recent course change, such as a roundabout or a roundabout.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to display a complicated guide route in an easy-to-understand manner using a display device composed of a plurality of fixed segments.

  In order to solve the above-described problem, the vehicle head-up display device according to the present invention reflects the projection light projected in front of the driver from the display unit with a reflective member, and displays the guidance route at the intersection as a virtual image. The display unit includes: a first display segment indicating a position of an intersection; a plurality of second display segments surrounding the first display segment; and the plurality of second display segments. Furthermore, it has a guide route display segment which is provided on the outer periphery and includes a plurality of third display segments indicating the current position of the vehicle and the direction of exit from the intersection.

  According to the vehicle head-up display device of the present invention, the plurality of second display segments and the plurality of third display segments constituting the fixed guidance route display segment are lit in combination with the above-described configuration. Therefore, not only the guidance route at the nearest intersection but also the guidance route at the next intersection that appears immediately after the intersection can be displayed at the same time.For example, at a roundabout or a three-dimensional intersection, Guide routes that cannot be expressed can be displayed in an easy-to-understand manner.

It is a lineblock diagram of the head up display device for vehicles which is one embodiment of the present invention. It is a figure which shows the structure of the guidance path | route display segment used for the segment type | mold display part of the head-up display apparatus for vehicles of Example 1. FIG. It is sectional drawing which shows the cross-section which cut | disconnected the segment type display part 40 of FIG. 1 by the cutting line AA. In Example 1, it is a figure which shows the example which performed the virtual image display of the guidance path | route in a plane intersection. In Example 1, it is a figure which shows the example which performed the virtual image display of the guidance path | route in roundabout. In Example 1, it is the 1st figure which shows the example which performed the virtual image display of the guidance path | route in an underpass. In Example 1, it is the 2nd figure which shows the example which performed the virtual image display of the guidance path | route in an underpass. 6 is a diagram illustrating a configuration of a display segment used in a modification of Example 1. FIG. It is a figure which shows the virtual image display example of the guidance path | route displayed in the modification of Example 1. FIG.

  Hereinafter, Example 1 which is a specific embodiment of the vehicle head-up display device of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram showing a schematic structure of a vehicle head-up display device 100 according to an embodiment of the present invention. First, the overall configuration of the vehicle head-up display device 100 will be described with reference to FIG.
[Description of Overall Configuration of Embodiment 1]

  A vehicle head-up display device 100 is mounted on a vehicle 10 as shown in FIG. 1, and includes a segment type display unit 40 (display unit), a combiner 50 (reflective member), an illumination light source control unit 60, a car And a navigation device 70.

  The segment type display unit 40 (display unit) includes an illumination mounting substrate 20 on which a plurality of illumination light sources are mounted, a lighting box 25, and a dial plate 30.

  The dial 30 is formed in a planar shape on the surface of the segment type display unit 40 (display unit), the front side of the vehicle 10 is arranged at a position closer to the combiner 50, and the rear side of the vehicle 10 is further away from the combiner 50. It is installed so that it may be arranged at the position. On the surface of the dial 30, guidance route display segments 31, which are a plurality of translucent fixed segments that indicate the traveling direction of the vehicle 10, are provided.

  The guidance route display segment 31 includes a plurality of segments that represent the guidance route of the vehicle 10. Specifically, it is composed of a first display segment 36, a second display segment 34 surrounding the first display segment 36 in a ring shape, and a third display segment 32 provided on the outer periphery of the second display segment 34. Yes. A more specific configuration of the guide route display segment 31 and an internal structure of the segment type display unit 40 will be described later.

  The combiner 50 (reflective member) is installed on the upper part of the dashboard (not shown) of the vehicle 10, and the projection light 45 projected from the segment type display unit 40 (display unit) is transmitted to the driver 80 of the vehicle 10. This is a reflective member made of, for example, black polycarbonate, arranged in a positional relationship so as to reflect toward the eyeball 82.

  The car navigation device 70 measures the current position of the vehicle 10, compares the measured current position with a map database, calculates and outputs a guidance route to a preset destination.

  Specifically, when viewed from the current position of the vehicle 10, the distance to the intersection closest to the traveling direction, the shape information of the intersection, and the traveling direction of the vehicle 10 at the intersection are output to the illumination light source control unit 60.

  The illumination light source control unit 60 receives the route guidance information output from the car navigation device 70, and when the distance to the intersection falls below a predetermined value (for example, 1 km), the course and intersection that the vehicle 10 should take at the intersection The escape direction from the figure is graphed and displayed on the segment type display unit 40 (display unit).

  Specifically, the illumination light source control unit 60 is based on the intersection shape information received from the car navigation device 70, the course that the vehicle 10 should take at the intersection, and the exit direction from the intersection. For each of a plurality of illumination light sources (white LEDs to be described later) mounted on, a lighting / lighting state is determined and lighting control is performed. The guidance route of the vehicle 10 is displayed on the guidance route display segment 31 by this lighting on / off control.

The guidance path displayed on the segment type display unit 40 (display unit) in this way is projected onto the combiner 50 (reflective member) as projection light 45. Since the projection light 45 is reflected by the combiner 50 toward the eyeball 82 of the driver 80, when viewed from the driver 80, a virtual image 55 of the guidance path is formed in front of the combiner 50, that is, in the traveling direction of the vehicle 10. .
[Description of configuration of segment type display unit]

  FIG. 2 shows a configuration of the guide route display segment 31 formed on the dial 30 described above. As shown in FIG. 1, the guidance route display segment 31 is formed on the dial 30 of the segment type display unit 40 (display unit). FIG. 3 is a cross-sectional view of the segment type display unit 40 of FIG. 1 taken along a cutting line AA.

  As shown in FIG. 2, the guide route display segment 31 is composed of a plurality of fixed segments. That is, the guide route display segment 31 includes a first display segment 36 at the center, a second display segment 34 composed of eight segments surrounding the first display segment 36 in an annular shape, and a further outer periphery of the second display segment 34. It is composed of a third display segment 32 made up of eight segments. In FIG. 2, the upper side in the drawing represents the far side from the vehicle 10, and the lower side in the drawing represents the side close to the vehicle 10.

  The first display segment 36 represents the position of an intersection existing in front of the vehicle 10.

  The second display segment 34 includes eight segments 34a, 34b, 34c, 34d, 34e, 34f, 34g, and 34h that surround the first display segment 36 in a ring shape, and represents two types of route information.

  One is the traveling direction of the vehicle 10 after passing the intersection indicated by the first display segment 36. Specifically, the segment 34d represents the approach direction to the intersection, and the segments 34a, 34b, 34c, 34e, 34f, 34g, and 34h represent the exit direction from the intersection.

  The other is the traveling direction of the vehicle 10 at a roundabout (circular intersection) or a three-dimensional intersection existing in front of the vehicle 10. Specifically, the segment 34d represents a first course change place at a roundabout or a three-dimensional intersection, and the segments 34a, 34b, 34c, 34e, 34f, 34g, and 34h have passed through the first course change place. A course and a 2nd course change location are represented.

  The third display segment 32 includes eight segments 32a, 32b, 32c, 32d, 32e, 32f, 32g, and 32h that further surround the outer periphery of the second display segment 34, and represents two types of route information.

  One is an escape direction from the intersection indicated by the first display segment 36. Specifically, the segment 32d represents the current position of the vehicle 10, and the segments 32a, 32b, 32c, 32e, 32f, 32g, and 32h represent the escape direction from the intersection.

  The other is an escape direction from a roundabout or a three-dimensional intersection existing in front of the vehicle 10. Specifically, the segment 32d represents the current position of the vehicle 10, and the segments 32a, 32b, 32c, 32e, 32f, 32g, and 32h represent the escape direction from a roundabout or a three-dimensional intersection.

  Next, the internal structure of the segment type display unit 40 (display unit) will be described with reference to FIG. The segment type display unit 40 has a trapezoidal vertical cross-sectional shape, and the illumination mounting substrate 20 is installed on a surface corresponding to the height of the trapezoid.

  A plurality of white LEDs 22a, 22b, 22c, 22d, and 22e are mounted on the surface of the illumination mounting board 20.

  In the interior of the lighting box 25, the white LEDs 22a, 22b, 22c, 22d, and 22e are formed as cavities that surround the LEDs and extend upward. On the inner surfaces 25a, 25b, 25c, 25d, and 25e of the cavities, there are formed reflection surfaces that reflect the light emitted from the white LEDs 22a, 22b, 22c, 22d, and 22e toward the upper side of the lighting box 25. These reflective surfaces penetrate the slope side of the segment type display unit 40 (display unit), and a dial 30 is installed at a position where the reflective surface penetrates.

  In the dial plate 30, a plurality of segments 32d, 34d, 36, 34h, and 32h are formed at positions through which the cavities penetrate. Therefore, the light emitted from the white LEDs 22a, 22b, 22c, 22d, and 22e passes through the segments 32d, 34d, 36, 34h, and 32h formed on the dial plate 30, and the segment type display unit 40 (display unit). ) And projected onto the combiner 50 (FIG. 1) as projection light 45 (FIG. 1).

  A color filter may be attached to each segment 32d, 34d, 36, 34h, 32h on the dial plate 30 as necessary. Due to the action of this color filter, the projection light 45 (FIG. 1) becomes light of a color corresponding to the color filter, so that the formed virtual image 55 is colored in a color corresponding to the color filter.

Note that the segments 32a, 32b, 32c, 32e, 32f, 32g, 34a, 34b, 34c, 34e, 34f, and 34g (FIG. 2) not shown in FIG. The light emitted from the white LED mounted at the position corresponding to each segment on 20 passes through and is projected onto the combiner 50 (FIG. 1).
[Description of guidance route display example]

  The operation of the vehicle head-up display device 100 shown in FIG. 1 will be described. The projection light 45 projected from the segment type display unit 40 (display unit) is regularly reflected toward the driver 80 at the reflection point R on the combiner 50 (reflection member).

  At this time, the projection light 45 emitted from each segment on the dial 30 (for example, the first display segment 36 in FIG. 1) is on a straight line L connecting the eyeball 82 of the driver 80 and the reflection point R on the combiner 50. Then, a virtual image 55 of each segment is formed. The virtual image 55 is formed at a position corresponding to the distance d between each segment and the reflection point R.

  In other words, the virtual image 55 is formed farther from the driver 80 as the distance d between each segment and the reflection point R is longer.

  Therefore, when the segment type display unit 40 (display unit) having the structure shown in FIG. 3 is installed in the layout of FIG. 1, among the segments 32d, 34d, 36, 34h, and 32h shown in the sectional view of FIG. The virtual image 55 of the segment 32d with the shortest distance to the combiner 50 is imaged closest to the driver 80. The virtual image 55 of the segment 32h having the longest distance to the combiner 50 is formed farthest when viewed from the driver 80.

  Therefore, the virtual image 55 formed from the guide route display segment 31 shown in FIG. 2 forms an image farther away from the vehicle 10 in the guide route. By superimposing such a virtual image display having a sense of perspective on the actual driving environment, it is possible to further improve the intelligibility of the guidance route.

  An example of the guidance route displayed by the present embodiment will be described with reference to FIG. 4, taking a guidance route when passing through a normal plane intersection as an example.

  FIG. 4 is an example in which a guidance route that turns right after entering a plane intersection (so-called crossroad) is displayed as a virtual image 55a.

  That is, by turning on only the white LED corresponding to the guide path, the virtual image 32d ′ of the segment 32d, the virtual image 34d ′ of the segment 34d, the virtual image 36 ′ of the segment 36, the virtual image 34f ′ of the segment 34f, and the segment 32f Each virtual image 32f ′ is displayed and a virtual image 55a is formed. At this time, the displayed virtual image 55a forms an image farther away as the position is farther from the vehicle 10, as described above.

  In addition, in order to display the virtual image of each segment 32d, 34d, 36, 34f, and 32f described above, the white LEDs mounted at the positions corresponding to the segments 32d, 34d, 36, 34f, and 32f are respectively turned on. Other white LEDs are turned off. The white LED is turned on and off by an instruction from the illumination light source control unit 60.

  Next, an example of a guidance route when passing through the roundabout will be described with reference to FIG.

  FIG. 5 shows a guide route that, after entering the roundabout, proceeds in a clockwise direction along the circular path constituting the roundabout and escapes from a direction that forms an angle of about 45 ° to the right with respect to the approaching direction to the roundabout. Is displayed as a virtual image 55b.

  That is, by turning on only the white LED corresponding to the guide path, the virtual image 32d ′ of the segment 32d, the virtual image 34d ′ of the segment 34d, the virtual image 34c ′ of the segment 34c, the virtual image 34b ′ of the segment 34b, and the segment 34a The virtual image 34a ′, the virtual image 34h ′ of the segment 34h, the virtual image 34g ′ of the segment 34g, and the virtual image 32g ′ of the segment 32g are displayed to form a virtual image 55b. At this time, the displayed virtual image 55b forms an image farther away as the position is farther from the vehicle 10, as described above.

  Here, the virtual image 34d 'of the segment 34d represents the first course change point in the roundabout. Further, a virtual image 34g 'of the segment 34g represents a second course change place in the roundabout. Furthermore, the virtual image 32g 'of the segment 32g represents the escape direction from the roundabout.

  In addition, in order to display the virtual image of each segment 32d, 34d, 34c, 34b, 34a, 34h, 34g, and 32g, the positions corresponding to the segments 32d, 34d, 34c, 34b, 34a, 34h, 34g, and 32g are displayed. The mounted white LEDs are turned on, and the other white LEDs are turned off. The white LED is turned on and off by an instruction from the illumination light source control unit 60.

  Next, an example of a guidance route when passing through a three-dimensional intersection will be described with reference to FIGS. 6A and 6B.

  FIG. 6A is an example in which a guide route for turning left on a crossing road after entering a three-dimensional intersection constituting an underpass or overpass is displayed as a virtual image.

  That is, by turning on only the white LED corresponding to the guide path, the virtual image 32d ′ of the segment 32d, the virtual image 34d ′ of the segment 34d, the virtual image 34c ′ of the segment 34c, the virtual image 34b ′ of the segment 34b, and the segment 32b Each virtual image 32b ′ is displayed to form a virtual image 55c. At this time, the displayed virtual image 55c forms an image farther away as the position is farther from the vehicle 10, as described above. Note that the white LEDs corresponding to the segments not displayed in FIG. 6A are turned off.

  Here, the virtual image 34d 'of the segment 34d represents the first course change point at the three-dimensional intersection. Further, the virtual image 34b 'of the segment 34b represents the second course change place at the three-dimensional intersection. Further, the virtual image 32b 'of the segment 32b represents the escape direction from the three-dimensional intersection.

  FIG. 6B is an example of a virtual image display of a guidance route for turning right on an intersecting road after entering a three-dimensional intersection constituting an underpass or overpass.

  That is, by turning on only the white LED corresponding to the guide path, the virtual image 32d ′ of the segment 32d, the virtual image 34d ′ of the segment 34d, the virtual image 34c ′ of the segment 34c, the virtual image 34b ′ of the segment 34b, and the first image The virtual image 36 ′ of the display segment 36, the virtual image 34f ′ of the segment 34f, and the virtual image 32f ′ of the segment 32f are displayed to form a virtual image 55d. At this time, the displayed virtual image 55d forms an image farther away as the position is farther from the vehicle 10, as described above. Note that white LEDs corresponding to segments not displayed in FIG. 6B are turned off.

Here, the virtual image 34d ′ of the segment 34d represents the first course change place at the three-dimensional intersection. Further, the virtual image 34b ′ of the segment 34b represents the second course change place at the three-dimensional intersection. Furthermore, the virtual image 32f ′ of the segment 32f represents the escape direction from the three-dimensional intersection.
[Description of Modified Example of Embodiment 1]

  Next, a modification of the vehicle head-up display device 100 of the present invention will be described with reference to FIGS. 7A and 7B.

  FIG. 7A shows an example in which a distance display segment 38 composed of a plurality of segments 38a, 38b, 38c, 38d, and 38e for displaying the distance to the intersection is installed in the vicinity of the guidance route display segment 31. A distance scale 39 is arranged in the vicinity of the distance display segment 38.

  The distance display segment 38 displays an approximate distance from the vehicle 10 to the intersection displayed by the guidance route display segment 31. That is, when the distance to the intersection is 1 km or more, all the distance segments 38a, 38b, 38c, 38d, and 38e are turned on.

  When the distance to the intersection is 300 m or more and less than 500 m, the distance segments 38a, 38b, 38c, and 38d are turned on.

  When the distance to the intersection is 100 m or more and less than 300 m, the distance segments 38a, 38b, and 38c are turned on.

  Further, when the distance to the intersection is less than 100 m, the distance segments 38a and 38b are turned on.

  When the vehicle is in the immediate vicinity of the intersection, only the distance segment 38a is turned on.

  FIG. 7B is an example in which the guide route is displayed as a virtual image 55e by operating the guide route display segment 31 and the distance display segment 38 at the same time while traveling about 400 m before the roundabout. In addition, it has shown that the segment displayed with the dotted line in FIG. 7B is light-extinguished.

  That is, as shown in FIG. 7B, virtual images 32a ′, 34a ′, 34b ′, 34c ′, 34d ′, and 32d ′ indicating the guidance route are displayed, and the guidance route passing through the roundabout is displayed as a virtual image 55f. At the same time, the distance to the entry point to the roundabout which is the nearest intersection is displayed as a virtual image 55g depending on the lighting state of the distance display segment 38. In the case of FIG. 7B, by turning on the distance segments 38a, 38b, 38c constituting the distance display segment 38, virtual images 38a ′, 38b ′, 38c ′, 38d ′ are displayed, and the distance to the nearest intersection is 300 m. It is displayed that the distance is less than 500 m.

  As described above, according to the vehicle head-up display device 100 according to the first embodiment, the first display segment 36 indicating the position of the intersection, and the plurality of second display segments 34 surrounding the first display segment 36, A segment-type display unit having a guide route display segment 31 provided on the outer periphery of the plurality of second display segments 34 and including a plurality of third display segments 32 indicating the current position of the vehicle 10 and the direction of escape from the intersection. A plurality of second display segments 34 are displayed in order that the projected light 45 projected from 40 (display unit) in front of the driver 80 is reflected by the combiner 50 (reflective member) and the guidance route at the intersection is displayed as a virtual image 55. And a plurality of third display segments 32 are combined and lit to display a free-form guidance route Without the use of a liquid crystal panel capable of not only the guidance route in the last intersection, the guidance route in the next intersection close to the intersection can also be displayed simultaneously. Therefore, a vehicle head-up display device that can easily display a guidance route that cannot be expressed only by turning right or left can be realized at low cost.

  In addition, according to the vehicle head-up display device 100 according to the first embodiment, since the guidance route in the roundabout is displayed according to the lighting state of the second display segment 34 and the third display segment 32, the route is changed twice. The guidance route in the subsequent roundabout can be displayed in an easy-to-understand manner.

  And according to the head-up display device 100 for vehicles which concerns on Example 1, since the guidance path | route in a solid intersection is displayed by the lighting state of the 2nd display segment 34 and the 3rd display segment 32, a course change is performed twice. It is possible to display the guidance route at the subsequent three-dimensional intersection in an easy-to-understand manner.

  Furthermore, according to the vehicle head-up display device 100 according to the modification of the first embodiment, the segment type display unit 40 (display unit) is further in the vicinity of the guidance route display segment 31 and the distance from the vehicle 10 to the intersection. Since there are a plurality of distance display segments 38 representing the information, not only the guidance route but also the approaching state to the intersection can be displayed in an easy-to-understand manner.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention.

  For example, a configuration in which a multifunctional portable terminal (for example, a smartphone) brought into the vehicle 10 by a driver and an illumination light source control unit 60 are connected and a guidance route is displayed using the car navigation function of the multifunctional portable terminal is also included in the present invention. included.

DESCRIPTION OF SYMBOLS 10 ... Vehicle 20 ... Lighting mounting board 25 ... Lighting box 30 ... Dial 31 ... Guide route display segment 32 ... Third display segment 34 ... · Second display segment 36 ··· First display segment 40 ··· Segment display unit (display unit)
45 ··· Projection light 50 ··· Combiner (reflective member)
55 ... Virtual image 60 ... Illumination light source controller 70 ... Car navigation device 80 ... Driver 82 ... Eyeball 100 ... Vehicle head-up display device

Claims (4)

A vehicle head-up display device that reflects projection light projected in front of a driver from a display unit with a reflective member and displays a guidance route at an intersection as a virtual image,
The display unit includes a first display segment indicating a position of an intersection;
A plurality of second display segments surrounding the first display segment;
A vehicle having a guide route display segment, further comprising a plurality of third display segments provided on an outer periphery of the plurality of second display segments and indicating a current position of the vehicle and an exit direction from an intersection. Head-up display device.   The vehicle head-up display device according to claim 1, wherein a guidance route in a roundabout is displayed according to a lighting state of the second display segment and the third display segment.   The vehicle head-up display device according to claim 1, wherein a guidance route at a three-dimensional intersection is displayed according to a lighting state of the second display segment and the third display segment.   4. The display device according to claim 1, further comprising: a plurality of distance display segments that represent distances from the vehicle to the intersection in the vicinity of the guidance route display segment. 5. A head-up display device for a vehicle according to claim 1.