JP2019166886A - Display device for vehicle - Google Patents

Abstract

To provide a display device for a vehicle for enabling a driver to easily and accurately grasp the position of an own vehicle.SOLUTION: A display device (1) for a vehicle for displaying information on a front windshield (24) of a vehicle includes a meter (4) arranged on an instrument panel (22) of the vehicle, and a head-up display (6) configured so as to project an image on the front windshield (24) of the vehicle. The head-up display (6) is configured so as to display a meter contour line (30) having a similar shape to the contour of the meter (4) in front of a vehicle driver when viewed from the driver.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle display device, and more particularly to a vehicle display device that displays information on a windshield of a vehicle.

  Japanese Patent Laying-Open No. 2017-144889 (Patent Document 1) describes a vehicle apparatus, a control method for the vehicle apparatus, and a control program for the in-vehicle apparatus. In this vehicle device, a vanishing point is set according to the height position of the driver's eyes, and a display image expressed by a one-point perspective method based on the vanishing point is displayed on the windshield of the vehicle by a head-up display. Is displayed. Specifically, as a display image, an arrow-shaped mark indicating the traveling direction of another vehicle detected by the surrounding state acquisition unit and an arrow-shaped mark indicating the planned traveling direction of the host vehicle are displayed on the windshield. The

Japanese Unexamined Patent Publication No. 2017-144889

  On the other hand, according to the inventor's research, by making the driver aware of the “axis feeling” that is a sense of the axis line (optical flow) extending from a distant vanishing point, the driver can determine the position of the vehicle in the lane. It has become clear that it becomes easier to grasp and that it is possible to reliably travel in an appropriate position in the lane. However, in the in-vehicle device described in Patent Document 1, there is still room for improvement in order to make the driver feel the axial feeling naturally, and depending on the driver, the display image displayed on the windshield may be disturbed. .

  Accordingly, an object of the present invention is to provide a vehicle display device that allows a driver to easily and accurately grasp the position of the host vehicle.

  In order to solve the above-described problems, the present invention provides a display device for a vehicle that displays information on a windshield of a vehicle, and displays an image on a meter disposed on an instrument panel of the vehicle and the windshield of the vehicle. A head-up display configured to project, wherein the head-up display displays a meter outline similar to the outer shape of the meter as viewed from the driver in front of the driver of the vehicle. It is characterized by being configured.

  In the present invention configured as described above, a meter is arranged on the instrument panel of the vehicle, and the windshield of the vehicle has a shape similar to the outer shape of the meter as viewed from the driver in front of the driver. The meter outline is displayed on the head-up display.

  According to the present invention thus configured, a meter outline similar to the outer shape of the meter is displayed in front of the driver, so that the driver unconsciously The connection (relevance) of the meter outlines displayed in front of the front is felt, and the “axis” that connects them is felt. That is, the driver of the vehicle can unconsciously sense the axis extending in the front-rear direction from the vanishing point, and can easily and accurately grasp the position of the host vehicle.

  In the present invention, it is preferable that the head-up display displays a meter outline so that the head-up display is visually recognized as being disposed at substantially the same height as the meter as viewed from the driver.

  According to the present invention configured as described above, since the meter contour line is displayed so as to be visually recognized when it is arranged at substantially the same height position as the meter, the meter on the instrument panel and the meter contour line are displayed. It is possible to make the driver more conscious of the connection to the vehicle and to give the driver a clearer “axis feeling”.

  In the present invention, it is preferable that the head-up display is visually recognized as being substantially the same size as the meter at a position that is substantially the same distance as the distance to the front end of the vehicle when viewed from the driver. Meter outline is displayed.

  According to the present invention configured as described above, the meter contour line can be visually recognized when an object having approximately the same size as the meter is disposed at a position that is approximately the same distance as the distance to the front end of the vehicle. Is displayed, which makes it easier for the driver to grasp the perspective. In other words, if a meter that is almost the same size as the meter is placed at the front end of the vehicle, it is possible to give the driver a perspective reference that looks like this size. Can be grasped more accurately.

  In the present invention, preferably, the head-up display changes the luminance or color for displaying the meter outline based on the traveling state of the vehicle.

  The meter outline displayed by the head-up display is preferably present in the driver's field of view so as to be appropriately conscious by the driver. However, depending on the traveling state of the vehicle, the driver's consciousness may move away from the meter outline, which may make it difficult to give the driver an “axis feeling”. According to the present invention configured as described above, since the luminance or color for displaying the meter outline is changed depending on the running condition of the vehicle, the driver's consciousness is changed to the meter outline even when the running condition changes. It can be directed moderately.

  In the present invention, preferably, the head-up display increases the brightness of the meter outline displayed when the vehicle turns, or changes the color of the meter outline to a color that is easily visible to the driver.

  When the vehicle turns, the driver's line of sight deviates from the front front, and therefore the displayed meter contour line enters the driver's peripheral vision and is less likely to be noticed by the driver. According to the present invention configured as described above, when the vehicle turns, the brightness of the displayed meter outline is increased, or the color is changed to a color that is easily visible to the driver. In addition, the driver's consciousness can be appropriately directed toward the meter outline.

  In the present invention, preferably, the head-up display is configured to display information inside the meter outline, and the information displayed inside the meter outline includes information other than the information indicated by the meter. include.

  According to the present invention configured as described above, the information displayed inside the meter outline includes information other than the information instructed by the meter. At the same time, information other than the information indicated by the meter can be given, and the driver can be more naturally focused.

  According to the vehicle display device of the present invention, the driver can easily and accurately grasp the position of the host vehicle.

It is the figure which showed typically the scenery outside the vehicle which the driver | operator who drives a vehicle visually recognizes. 1 is a block diagram showing an entire vehicle display device according to an embodiment of the present invention. It is a figure which shows an example of the state which looked ahead from the driver's seat of the vehicle provided with the display apparatus for vehicles by embodiment of this invention. In the display device for vehicles by the embodiment of the present invention, it is a top view showing the positional relation of the picture displayed by the meter mounted in vehicles, and a head up display. In the display device for vehicles by the embodiment of the present invention, it is a side view showing the positional relationship of the picture displayed with the meter and head up display which were carried in vehicles. It is side surface sectional drawing which shows typically the structure of the head-up display in the display apparatus for vehicles by embodiment of this invention.

Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram schematically illustrating a scenery outside a vehicle visually recognized by a driver driving the vehicle.

  As shown in FIG. 1, the driver recognizes the scenery outside the vehicle while driving, grasps the position of the host vehicle in the space where the vehicle travels, and performs an appropriate driving action such as a steering operation. At this time, the driver unknowingly recognizes the position of the vehicle in the space while recognizing the distant vanishing point P and the virtual axes A1 to 8 extending radially from the vanishing point P. Yes. Here, the vanishing point P is a point on the distant horizon L, and when the vehicle is traveling in a straight lane with a constant width as in the example shown in FIG. It is located at the intersection of the axis A2 and the axis A7 that coincide with the line.

  However, the virtual axis A extending from the vanishing point P is blocked by the window frame W of the front window before reaching the feet of the driver. For this reason, the driver is driving while imagining a virtual axis extending outside the window frame W in his / her head. However, the present inventors have found that the driver may be less aware of the axis extending from the vanishing point to the driver when the driver seated in the driver's seat visually recognizes the front. And it became clear that by arranging an image serving as a mark on the axis extending from the vanishing point to the driver, the driver's line of sight is guided to the vanishing point, and the axis extending from the vanishing point is easily conscious. That is, by providing a mark on the axis extending from the vanishing point, the driver can easily obtain an “axis feeling” that is an image of the axis extending from the vanishing point to his / her feet, and in the space where the vehicle travels. The position of the own vehicle can be accurately grasped.

  Next, a schematic configuration of the vehicle display device according to the embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a block diagram showing the entire vehicle display device according to the embodiment of the present invention. FIG. 3 is a diagram illustrating an example of a state in which the front is viewed from the driver's seat of the vehicle including the vehicle display device according to the embodiment of the present invention.

  As shown in FIG. 2, the vehicle display device 1 of the present embodiment includes an ECU 2 (Electronic Control Unit) mounted on the vehicle, a meter 4 disposed on the instrument panel 22 (FIG. 3) of the vehicle, And a head-up display (HUD) 6 configured to project an image onto a vehicle windshield 24 (FIG. 3). Further, the ECU 2 receives information from the vehicle speed sensor 8, and information from the car navigation system 10, the yaw rate sensor 12, the steering sensor 14, the vehicle interior camera 16, the vehicle exterior camera 18, and the like, and based on these information. Various information is displayed on the meter 4 and the head-up display 6.

  The vehicle speed sensor 8 is configured to detect the rotational speed of the vehicle axle. Information on the detected rotational speed is input to the ECU 2 where the absolute speed of the vehicle is calculated. The vehicle speed calculated in the ECU 2 is input to the meter 4 and the head-up display 6 and displayed.

  The car navigation system 10 receives radio waves from GPS satellites to detect the position of the host vehicle, stores map information therein, and can provide map information to the ECU 2. The ECU 2 identifies roads, intersections, traffic signals, buildings, etc. existing around the vehicle (particularly in the forward direction) based on the map information and the current vehicle position information. The map information may be stored in the ECU 2.

  The yaw rate sensor 12 is configured to detect the yaw angular velocity of the host vehicle, and is configured to output information on the detected yaw angular velocity to the ECU 2. Whether or not the vehicle is turning can be determined based on the detected yaw angular velocity.

  The steering sensor 14 is configured to detect a rotation angle of the steering wheel 26 (FIG. 3) of the vehicle and output information on the detected rotation angle to the ECU 2. Based on the detected rotation angle of the steering wheel 26, steering by the driver can be detected.

  The vehicle interior camera 16 is configured to photograph a vehicle interior of the vehicle, particularly a vehicle driver. An image photographed by the vehicle interior camera 16 is output to the ECU 2, and by analyzing the image, it is possible to detect the driving behavior of the driver, the direction of the line of sight, and the like.

  The vehicle exterior camera 18 is configured to photograph the periphery of the vehicle, particularly the front of the vehicle. An image photographed by the vehicle exterior camera 18 is output to the ECU 2, and the image is analyzed here, thereby detecting a travel lane of the vehicle, a sign provided along the travel route, and being on the travel route. An obstacle etc. can be detected. It should be noted that a plurality of cameras outside the vehicle compartment can also be provided for photographing the side of the vehicle and the rear.

  Information detected by the above-described various sensors and the like is input to the ECU 2, and after predetermined information processing is performed, the information is sent to the meter 4 and the head-up display 6 mounted on the vehicle. Presented to. The information presented by the meter 4 and the head-up display 6 may all be the same, some may overlap, or all may be different. The display of information by the head-up display 6 can be turned off.

  As shown in FIG. 3, in this embodiment, the meter 4 provided on the instrument panel 22 is provided with three pointer-type instruments, each of which is circular and arranged symmetrically. Yes. The instrument provided in the center is a speedometer 4a, which has the largest diameter among the three, and is configured to display the speed of the vehicle by the rotation angle of the pointer. The meter provided on the right side of the speedometer 4a is a rotation speed meter 4b, which is smaller in diameter than the speedometer 4a and displays the rotation speed per unit time of the engine output shaft mounted on the vehicle by the rotation angle of the pointer. Is configured to do. The meter provided on the left side of the speedometer 4a is a water temperature / fuel meter 4c, which has the same diameter as the rotational speed meter 4b, the temperature of the cooling water of the engine mounted on the vehicle, and the remaining fuel in the fuel tank. Configured to display quantity.

  Some or all of the speedometer 4a, the rotation speed meter 4b, and the water temperature / fuel meter 4c may be configured to indicate the indicated value with a mechanical needle, or may be indicated by a display screen such as a liquid crystal display. May be configured to display. Further, a part or all of each meter may be a digital meter that displays the indicated value numerically. The information displayed by the meter 4 may be a part of the above information, or the meter 4 can be configured so that information other than the above is displayed. Furthermore, when each meter is configured by a display screen such as a liquid crystal, the present invention can be configured such that different information is displayed according to the traveling state of the vehicle.

  The head-up display 6 is configured to display information in front of the driver of the vehicle by projecting an image on the windshield 24 of the vehicle. The head-up display 6 is provided below the dashboard 28 on the back side of the instrument panel 22 and is configured to project light onto the windshield 24 through the dashboard 28.

  As shown in FIG. 3, in the present embodiment, the image displayed by the head-up display 6 includes a meter outline 30 composed of three circles. The meter contour line 30 includes a circular first contour line 30a having the largest diameter, a second contour line 30b disposed on the right side of the first contour line 30a and having a diameter smaller than that of the first contour line 30a, It is comprised from the 3rd outline 30c of the same diameter as the 2nd outline 30b arrange | positioned on the left side of the 1 outline 30a.

  In the example shown in FIG. 3, the current vehicle speed of the vehicle is digitally displayed inside the first contour line 30 a at the center, and the speed limit of the currently running lane is displayed inside the third contour line 30 c on the left side. It is displayed as a sign. Further, a traveling route for reaching the destination set in the car navigation system 10 is instructed inside the second contour line 30b on the right side (in FIG. 3, a right turn at the next intersection is instructed). ing). In addition to the above, arbitrary information can be displayed by the head-up display 6. Thus, the information displayed inside the meter outline 30 may include information other than the information indicated by the meter 4.

  Further, the meter outline 30 is configured in a shape similar to the outer shape of the meter 4 as viewed from the driver of the vehicle. That is, the ratio between the diameter of the speedometer 4a and the diameter of the first contour line 30a, the ratio of the diameter of the rotational speed meter 4b and the diameter of the second contour line 30b, and the diameter of the water temperature / fuel meter 4c and the third contour line 30c. The diameter ratios are all equal. In addition, the positional relationship of the speed meter 4a, the rotation speed meter 4b, and the water temperature / fuel meter 4c in the meter 4 and the positional relationship of the first, second, and third contour lines in the meter contour line 30 are also made equal. The meter outline 30 is similar to the outer shape of the meter 4.

  Further, as shown by broken lines in FIG. 3, a straight line connecting both ends of the speedometer 4a and both ends of the first contour line 30a, a straight line connecting both ends of the rotation speed meter 4b and both ends of the second contour line 30b, and water temperature / fuel The straight lines connecting both ends of the meter 4c and both ends of the third contour line 30c intersect at a vanishing point P viewed from the driver sitting in the driver's seat. Thus, by configuring the external shape of the meter 4 and the meter outline 30 in a similar shape, the driver unconsciously knows the connection (relevance) of the images displayed by the meter 4 and the head-up display 6 in the passenger compartment. To feel. Furthermore, the driver unconsciously recognizes the distant vanishing point P by arranging the images so that the straight lines connecting the contours of the meter 4 and the corresponding points of the meter outline 30 intersect at the vanishing point P. And the position of the host vehicle in the traveling space can be accurately grasped.

Next, with reference to FIG. 4 thru | or FIG. 6, the structure of the head-up display 6 etc. in the display apparatus 1 for vehicles of this embodiment are demonstrated.
FIG. 4 is a plan view showing a positional relationship between images displayed by the meter 4 mounted on the vehicle and the head-up display 6, and FIG. 5 is a side view thereof. FIG. 6 is a side sectional view schematically showing the configuration of the head-up display 6.

  As shown in FIG. 4, the meter 4 provided in the vehicle display device 1 is disposed on the instrument panel 22 in front of the driver (driver's seat). On the other hand, the meter outline 30 displayed by the head-up display 6 is displayed near the front end of the vehicle in front of the driver (driver's seat). Here, the head-up display 6 projects light onto the windshield 24 of the vehicle, and the light reflected thereby is incident on the driver's eyes and is recognized as an image by the driver. However, an image (virtual image) by the head-up display 6 is visually recognized by the driver at the driver's seat as if an object is present in front of the windshield 24.

  As a result, as shown in FIG. 4, the head-up display 6 has a size approximately the same as that of the meter 4 at a position that is substantially the same distance as the distance to the front end of the vehicle as viewed from the driver. The meter outline 30 can be displayed so as to be visually recognized. Further, as shown in FIG. 5, the head-up display 6 displays a meter outline 30 so that the head-up display 6 is visually recognized as being disposed at substantially the same height as the meter 4 as viewed from the driver. Note that the image (FIG. 3) displayed inside the meter outline 30 is also displayed so as to be recognized as being disposed at the same position as the meter outline 30.

  As shown in FIG. 6, the head-up display 6 includes a light source device 32, a liquid crystal panel 34 that transmits light emitted from the light source device 32, a magnifying mirror 36 that reflects light transmitted through the liquid crystal panel 34, Have The light source device 32, the liquid crystal panel 34, and the magnifying glass 36 are disposed on the back side of the instrument panel 22 and below the dashboard 28.

The light source device 32 is a light source including red, green, and blue light emitting diodes, and is configured to emit light toward the liquid crystal panel 34.
The liquid crystal panel 34 is a panel for displaying an image to be presented to the driver via the head-up display 6, and is configured to be able to form various images according to information to be displayed.

  The magnifier 36 is a mirror configured to reflect light emitted from the light source device 32 and transmitted through the liquid crystal panel 34 in a predetermined direction. The light reflected by the magnifying glass 36 enters the windshield 24 through an opening 28a provided in the dashboard 28, and the light reflected by the windshield 24 enters the driver's eye e and is recognized as an image. Is done. Further, in the present embodiment, a free curved surface formed on a predetermined curved surface so that light reflected by the curved windshield 24 inclined with respect to the magnifying glass 36 is recognized as a normal image by the driver. A mirror is used as the magnifier 36.

  Here, the optical path of the light reflected by the windshield 24 and incident on the driver's eye e is equivalent to the optical path of the light emitted from the meter outline 30 shown by an imaginary line in FIG. For this reason, the light that is actually incident on the driver's eye e is light reflected by the windshield 24, but the driver sees the object that is positioned ahead of the windshield 24. It is visually recognized as follows.

  Furthermore, in the present embodiment, by configuring the head-up display 6 in this way, the meter outline 30 to be displayed is an object having the same shape and dimensions as the outer shape of the meter 4 by the driver. It is visually recognized as if it is arranged near the part (FIGS. 4 and 5). Thus, when an object having the same shape and dimensions as the meter 4 is visually recognized near the front end of the vehicle, the driver is given a reference for perspective, and the driver can more accurately detect surrounding objects. It becomes possible to grasp the distance.

  Further, the head-up display 6 is configured to change the luminance for displaying the meter outline 30 based on the traveling state of the vehicle. Specifically, the head-up display 6 is configured to increase the brightness of the meter outline 30 displayed when the vehicle turns. That is, in the present embodiment, the driver is given a “shaft feeling” by simultaneously viewing the meter 4 arranged in the passenger compartment and the meter outline 30 visually recognized in front of the vehicle. The position of the host vehicle can be easily and accurately grasped. However, when the vehicle turns by turning right, left, etc., the driver's line of sight deviates from the front front, so the driver visually recognizes the meter outline 30 in the peripheral visual field. For this reason, the meter outline 30 displayed by the head-up display 6 is less likely to be noticed by the driver when turning.

  In order to compensate for the decrease in the driver's consciousness with respect to the meter contour line 30, in this embodiment, the meter contour line 30 is displayed in a driving situation in which the driver's consciousness is likely to be separated from the meter contour line 30, such as during turning. The brightness is increased so that the consciousness can easily face the meter outline 30. The turning of the vehicle can be detected based on the information input to the ECU 2 from the yaw rate sensor 12 or the steering sensor 14. In addition, it is possible to detect turning traveling based on an image captured by the vehicle exterior camera 18 or the vehicle interior camera 16.

  Further, the present invention is configured so that the display brightness of the meter contour line 30 is increased when the vehicle interior camera 16 detects that the driver's line of sight has deviated from the front front as well as turning. You can also. Alternatively, the present invention is configured so that the driver's consciousness is directed toward the meter outline 30 by changing the color for displaying the meter outline 30 to a color that is easily visible to the driver, for example, a color with high saturation. It can also be configured. Preferably, by increasing the brightness of the meter outline 30 or changing the color, even if the driver is visually recognizing in the peripheral visual field, the same degree of consciousness as that in the central visual field is observed. It is directed to the contour line 30.

  According to the vehicle display device 1 of the embodiment of the present invention, the meter outline 30 similar to the outer shape of the meter 4 is displayed in front of the driver. The connection (relevance) between the meter 4 of the instrument panel 22 and the meter outline 30 displayed in front of the front is felt, and the “axis” connecting them is felt. That is, the driver of the vehicle can unconsciously sense the axis extending in the front-rear direction from the vanishing point P, and can easily and accurately grasp the position of the host vehicle.

  Further, according to the vehicular display device 1 of the present embodiment, since the meter outline 30 is displayed so as to be visually recognized when arranged at substantially the same height position as the meter 4, The connection between the meter 4 and the meter outline 30 can be more surely recognized by the driver, and a clearer “axis feeling” can be given to the driver.

  Furthermore, according to the vehicular display device 1 of the present embodiment, it is visually recognized that an object having the same size as the meter 4 is disposed at a position that is approximately the same distance as the distance to the front end of the vehicle. Since the meter outline 30 is displayed on the display, it is possible to make it easier for the driver to grasp the perspective.

  Further, according to the vehicle display device 1 of the present embodiment, since the luminance for displaying the meter outline 30 is changed depending on the running situation of the vehicle, the driver's consciousness can be changed even if the running situation changes. 30 can be moderately directed.

  Furthermore, according to the vehicle display device 1 of the present embodiment, when the vehicle turns, the brightness of the displayed meter outline 30 is increased. It can be made to be moderately directed.

  Further, according to the vehicle display device 1 of the present embodiment, the information displayed inside the meter outline 30 includes information other than the information indicated by the meter 4. At the same time as being aware of the “axis feeling”, information other than the information indicated by the meter 4 can be given, and the driver can be more naturally focused.

  As mentioned above, although preferable embodiment of this invention was described, a various change can be added to embodiment mentioned above. In particular, in the above-described embodiment of the present invention, the meter 4 is provided with three circular meters, that is, the speed meter 4a, the rotation speed meter 4b, and the water temperature / fuel meter 4c. The number and external shape of the instruments can be set arbitrarily.

DESCRIPTION OF SYMBOLS 1 Display apparatus for vehicles 2 ECU
4 meter 4a speed meter 4b speed meter 4c water temperature / fuel meter 6 head-up display 8 vehicle speed sensor 10 car navigation system 12 yaw rate sensor 14 steering sensor 16 vehicle interior camera 18 vehicle exterior camera 22 instrument panel 24 windshield 26 steering wheel 28 Dashboard 28a Opening 30 Meter outline 30a First outline 30b Second outline 30c Third outline 32 Light source device 34 Liquid crystal panel 36 Magnifier

Claims (6)

A vehicle display device for displaying information on a windshield of a vehicle,
A meter located on the instrument panel of the vehicle,
A head-up display configured to project an image on a windshield of a vehicle,
The head-up display is configured to display a meter outline similar to the outer shape of the meter as viewed from the driver in front of the driver of the vehicle. .   The vehicle display device according to claim 1, wherein the head-up display displays the meter outline so that the head-up display is visually recognized as being disposed at substantially the same height as the meter as viewed from the driver.   The head-up display is such that when viewed from the driver, it is visually recognized that a display of approximately the same size as the meter is disposed at a position that is approximately the same distance as the distance to the front end of the vehicle. The vehicle display device according to claim 1, wherein the display device displays a contour line.   4. The vehicle display device according to claim 1, wherein the head-up display changes a luminance or a color for displaying the meter outline based on a traveling state of the vehicle. 5.   The vehicle display according to claim 4, wherein the head-up display increases the brightness of the meter outline displayed when the vehicle turns, or changes the color of the meter outline to a color that is easily visible to the driver. apparatus.   The head-up display is configured to display information inside the meter outline, and the information displayed inside the meter outline includes information other than the information indicated by the meter. The vehicle display device according to any one of claims 1 to 5.

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