JP6801508B2 - Head-up display device - Google Patents

Description

The present invention relates to a head-up display device.

A head-up display (HUD: Head-Up Display) device is a display device mounted on a vehicle, and projects light constituting a display image onto a projection member such as a windshield to make a driver visually recognize a virtual image. For example, Patent Document 1 describes a vehicle display device that superimposes a virtual image for providing information on other vehicles, obstacles, center lines, etc. on a landscape seen through a windshield.

The inventor of the present application is considering as a head-up display device to notify by an image display that a vehicle may deviate from the driving lane when the vehicle may deviate from the driving lane.

Japanese Unexamined Patent Publication No. 2016-155446

However, it is not possible to tell whether the vehicle may deviate to the left or right simply by notifying that the vehicle may deviate from the driving lane. Therefore, when the vehicle may deviate from the traveling lane, a technique for presenting the direction in which the vehicle may deviate in an easy-to-understand manner is desired.

The present invention has been made in view of the above circumstances, and provides a head-up display device that clearly presents a direction in which a vehicle may deviate when the vehicle may deviate from the traveling lane. With the goal.

In order to achieve the above object of the present invention, the head-up display device according to the present invention is
A head-up display device that displays a virtual image so that it overlaps the scenery outside the vehicle.
Deviation detecting means for detecting that the vehicle may deviate from the driving lane, and
When the deviation detecting means detects the possibility, the vehicle includes a display means for displaying a warning image indicating the deviation direction which is the direction in which the vehicle may deviate.

According to the present invention, it is possible to clearly present the direction in which the vehicle may deviate.

Schematic diagram of a vehicle equipped with the head-up display device according to the embodiment A block diagram showing a functional configuration of the head-up display device according to the embodiment. A flowchart showing a display control process executed by the head-up display device according to the embodiment. Image diagram showing the field of view of the viewer when there is no possibility of the vehicle deviating Image diagram showing the field of view of the viewer when the vehicle may deviate Image diagram showing the field of view of the viewer immediately after the vehicle starts changing lanes Image diagram showing the field of view of the viewer while the vehicle is changing lanes Image diagram showing the field of view of the viewer immediately after the vehicle completes the lane change A diagram showing how the steering angle changes while the vehicle changes lanes. A diagram showing how the information image is displayed at the top of the image showing the boundary line. A diagram showing how the display position of the information image has moved.

(Embodiment)
Hereinafter, the present embodiment will be described with reference to the drawings. First, the head-up display device (hereinafter, appropriately referred to as “HUD device”) 100 according to the present invention will be described with reference to FIG.

As shown in FIG. 1, the HUD device 100 is installed on the dashboard or the like of the vehicle 1000, generates the display light N, and emits the display light N toward the windshield 210. The display light N is reflected by the windshield 210 and reaches the viewer 10 such as the driver of the vehicle 1000. As a result, the viewer 10 can visually recognize the virtual image V in front of the windshield 210. The virtual image V is an image that warns that the vehicle 1000 may deviate from the traveling lane and indicates a direction in which the vehicle 1000 may deviate, or an image that indicates that the vehicle 1000 is changing lanes. That is, the viewer 10 may deviate from the lane and the direction in which the vehicle 1000 may deviate by visually recognizing the virtual image V, or the vehicle 1000 is in the process of changing lanes. You can recognize that. The virtual image V is displayed on a display surface extending in the direction perpendicular to the road surface.

Next, the functional configuration of the HUD device 100 will be described with reference to FIG. As shown in FIG. 2, the HUD device 100 is mounted on the vehicle 1000 together with the navigation device 200, the steering angle sensor 300, and the blinker 400. Here, the HUD device 100, the steering angle sensor 300, and the blinker 400 are connected to each other via a CAN (Controller Area Network) 500. The HUD device 100 includes a control unit 110 and a display unit 120.

The control unit 110 controls the overall operation of the HUD device 100. The control unit 110 functionally includes a navigation information acquisition unit 111, a steering angle information acquisition unit 112, a blinker information acquisition unit 113, a deviation detection unit 114, and a display control unit 115. Although not shown, the control unit 110 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a flash memory, an RTC (Real Time Clock), a communication module, and the like, and these components. Is realized by the cooperation of. That is, the navigation information acquisition unit 111, the steering angle information acquisition unit 112, the blinker information acquisition unit 113, the deviation detection unit 114, and the display control unit 115, for example, the CPU executes a program stored in the ROM. It is realized by.

The navigation information acquisition unit 111 acquires navigation information from the navigation device 200 mounted on the vehicle 1000. The navigation device 200 is based on information indicating the current position of the vehicle 1000 (hereinafter, appropriately referred to as “current position information”) and information regarding the roads around the vehicle 1000 (hereinafter, appropriately referred to as “road information”). , A device that guides the vehicle 1000 to a predetermined destination. The current position information is accurate enough to accurately determine whether or not the vehicle 1000 may deviate from the lane in which the vehicle is traveling (hereinafter, appropriately referred to as "traveling lane") (for example, several centimeters). It is information indicating the current position with an accuracy of about several tens of centimeters.

The navigation device 200 includes a GPS (Global Positioning System) receiver (not shown). The navigation information acquisition unit 111 includes a communication module that communicates with the navigation device 200, and acquires navigation information including current position information and road information from the navigation device 200. The road information is information about a road, and is, for example, information indicating the position of the road, the shape of the road, the direction in which the road curves, the radius of curvature of the curve, the length of a straight line, and the like. Road information includes information indicating the number of lanes and the width of each lane.

The steering angle information acquisition unit 112 acquires information indicating the steering angle of the vehicle 1000 (hereinafter, appropriately referred to as “steering angle information”) from the steering angle sensor 300 via the CAN 500. The steering angle of the vehicle 1000 is an angle corresponding to the direction in which the vehicle 1000 travels, that is, an angle of the steering wheels of the vehicle 1000, and an angle corresponding to the rotation angle of the steering wheel of the vehicle 1000. The steering angle information is included in the vehicle information that can be transmitted and received via the CAN 500. The steering angle information acquisition unit 112 may acquire steering angle information from the steering angle sensor 300 without going through the CAN 500.

The blinker information acquisition unit 113 acquires blinker information from the blinker 400 via the CAN 500. The blinker information is information included in the above-mentioned vehicle information, and is information indicating the operating status of the left and right blinkers of the vehicle 1000. That is, the blinker information includes information indicating whether or not the right blinker mounted on the vehicle 1000 is operating, and information indicating whether or not the left blinker mounted on the vehicle 1000 is operating. The blinker 400 is a direction indicator, and is a device for notifying other vehicles and pedestrians of the direction in which the driver is going to advance the vehicle 1000. In addition, in FIG. 2, the left and right turn signal pairs (that is, two turn signals) are collectively shown as one turn signal 400.

The deviation detection unit 114 detects that the vehicle 1000 may deviate from the traveling lane. Is there a possibility that the vehicle 1000 deviates from the traveling lane based on the navigation information acquired by the navigation information acquisition unit 111 and the steering angle information acquired by the steering angle information acquisition unit 112? Determine if not. For example, the deviation detection unit 114 identifies the current position of the vehicle 1000 and the current traveling direction of the vehicle 1000 based on the current position information included in the navigation information. Further, the deviation detection unit 114 identifies the degree of bending of the traveling lane based on the road information included in the navigation information.

Then, when the steering angle indicated by the steering angle information is maintained, the deviation detection unit 114 immediately (for example, within 1 second) causes the vehicle 1000 to deviate from the traveling lane and be adjacent to the traveling lane. Determine whether or not to invade. The deviation detection unit 114 can also be said to be a deviation determination unit that determines whether or not the vehicle 1000 may deviate from the traveling lane. When the navigation information includes information indicating the traveling direction of the vehicle 1000 (hereinafter, appropriately referred to as "traveling direction information"), the deviation detection unit 114 uses this traveling direction information to obtain the current position. It is not necessary to perform the process of specifying the traveling direction of the vehicle 1000 based on the information.

The display control unit 115 controls the display unit 120 to display the virtual image V on the display unit 120. That is, the display control unit 115 causes the display unit 120 to generate and output the display light N for displaying the virtual image V. This virtual image V is an image corresponding to the warning image displayed on the windshield 210. The warning image is an image that clearly indicates the direction in which the vehicle 1000 may deviate (hereinafter, appropriately referred to as "deviation direction"). The deviation direction is one of the right direction and the left direction when viewed from the viewer 10.

The display unit 120 generates and outputs the display light N for displaying the virtual image V according to the control by the display control unit 115. The display unit 120 includes a light emitting element and a display element. The light emitting element is composed of, for example, an LED (Light Emitting Diode), a halogen lamp, or the like. The display element is composed of a reflective element such as a liquid crystal DMD (Digital Micromirror Device) or LCOS (registered trademark: Liquid Crystal On Sillicon), or a transmissive display element such as a TFT (Thin Film Transistor) liquid crystal panel.

Next, the display control process executed by the HUD apparatus 100 will be described with reference to the flowchart of FIG. The control unit 110 starts the display control process when the ignition switch of the vehicle 1000 is turned on.

First, the control unit 110 acquires navigation information from the navigation device 200 (step S101). Navigation information is information including current position information and road information. When the control unit 110 completes the process of step S101, the control unit 110 acquires steering angle information from the steering angle sensor 300 (step S102).

When the process of step S102 is completed, the control unit 110 determines whether or not the vehicle 1000 may deviate from the traveling lane based on the navigation information and the steering angle information (step S103). That is, when the control unit 110 maintains the steering angle based on the traveling direction of the vehicle 1000, the position of the vehicle 1000, the steering angle of the vehicle 1000, and the road shape of the traveling lane, the vehicle 1000 immediately moves. Determine whether or not to deviate from the driving lane.

When the control unit 110 determines that the vehicle 1000 is unlikely to deviate from the traveling lane (step S103: NO), the control unit 110 does not display an image (step S104). That is, the control unit 110 does not generate the virtual image V and does not display the virtual image V. In other words, the control unit 110 does not display either the warning image or the moving image on the display unit 120. Here, with reference to FIG. 4, how the viewer 10 visually recognizes the scenery in front of the vehicle 1000 through the windshield 210 when the control unit 110 does not display the virtual image V will be described.

First, as a precondition, it is assumed that the vehicle 1000 is traveling on a road having two lanes on each side and is traveling in the right lane. In the present embodiment, the lane in which the vehicle traveling in the direction opposite to the direction in which the vehicle 1000 travels (hereinafter, appropriately referred to as "opposite lane") is not displayed.

In FIG. 4, the visible area 600 is an area that can be visually recognized by the viewer 10. The upper region of the viewing region 600 is an region showing a landscape above the horizon, but in the present embodiment, the illustration is omitted for ease of understanding. Further, the lower region of the visible region 600 is an region showing a landscape below the windshield 210, but in the present embodiment, the illustration is omitted for easy understanding. The central area of the viewing area 600 includes a display area 700. The display area 700 is an area corresponding to the windshield 210, and is an area on which the virtual image V is projected.

In FIG. 4, the boundary line 610, the boundary line 620, and the boundary line 630 are boundary lines indicating the boundary between the lane 640 and the boundary line 650. Specifically, the boundary line 610 and the boundary line 620 are a pair of boundary lines indicating the boundary of the lane 640 on the road. Further, the boundary line 610 and the boundary line 630 are a pair of boundary lines indicating the boundary of the lane 650 on the road. The boundary line 610, the boundary line 620, and the boundary line 630 are solid white or yellow lines or broken lines drawn on the road. The lane 640 is the lane in which the vehicle 1000 is traveling, that is, the traveling lane. The lane 650 is the lane to the left of the lane in which the vehicle 1000 travels.

Here, as shown in FIG. 4, when it is determined that the vehicle 1000 is unlikely to deviate from the traveling lane, neither the warning image nor the moving image is displayed in the display area 700. Therefore, when it is determined that the vehicle 1000 is unlikely to deviate from the traveling lane (step S103: NO), the visibility of the viewer 10 is maintained and the viewer 10 is unlikely to deviate. I can tell you that.

On the other hand, when the control unit 110 determines that the vehicle 1000 may deviate from the traveling lane (step S103: YES), the control unit 110 acquires the blinker information from the blinker 400 (step S105). When the process of step S105 is completed, the control unit 110 determines whether or not the driver intends to change lanes based on the blinker information (step S106). The blinker information is information indicating the operating state of the blinker 400, and is information indicating whether or not the left blinker is operating and whether or not the right blinker is operating.

The control unit 110 determines whether or not the direction in which there is a possibility of deviation and the direction corresponding to the blinker in operation coincide with each other. For example, the control unit 110 determines that the driver has an intention to change lanes when the direction in which the vehicle may deviate is the right direction and the blinkers in operation are only the blinkers on the right side. Similarly, for example, the control unit 110 determines that the driver intends to change lanes when the direction in which the vehicle may deviate is the left direction and the blinkers in operation are only the blinkers on the left side. On the other hand, the control unit 110 determines that the driver has no intention of changing lanes in other cases. In other cases, for example, the direction in which there is a possibility of deviation is the left direction and the left turn signal is not operating, or the blinkers on both sides are in operation, or the direction in which there is a possibility of deviation is the right. This is the direction, when the blinkers on the right side are not operating, or the blinkers on both sides are operating.

When the control unit 110 determines that the driver does not intend to change lanes (step S106: NO), the control unit 110 displays a warning image in the display area 700 (step S107). The warning image is an image that clearly shows the deviation direction of the vehicle 1000, and is an image that informs the viewer 10 which of the left and right the vehicle 1000 is likely to deviate. The warning image is not superimposed on the boundary line 610 and the boundary line 620, and is displayed at a position different from the boundary line 610 and the boundary line 620.

As shown in FIG. 5, the warning image is an image (for example, image 711 and an image) showing a pair of boundary lines (for example, boundary line 610 and boundary line 620) indicating the boundary of a traveling lane (for example, lane 640) on the road. Image 720), which is an image in which the boundary line on the deviation direction side (for example, the boundary line 610) is highlighted. Here, the images 711 and 720 are strip-shaped images extending in the vertical direction when viewed from the viewer 10, and are arranged obliquely so as to approach each other in the upward direction. In the present embodiment, the deviation direction is the left direction, and an example in which the vehicle 1000 deviates from the lane 640 to the lane 650 will be described.

Image 711 is an icon image that imitates the boundary line 610, which is the boundary line on the left side of the traveling lane, and is a highlighted image. On the other hand, the image 720 is an icon image imitating the boundary line 620 which is the boundary line on the right side of the traveling lane. Here, the method of highlighting the image 711 can be adjusted as appropriate. Examples of the method of highlighting the image 711 include a method of blinking the image 711, a method of displaying the image 711 in a color that is more prominent than other images (for example, the image 720), and a method of displaying the image 711 with a higher brightness than the image 720. There is a method of displaying the image 711 with, a method of displaying the image 711 thicker than the image 720, and the like.

The blinking display cycle is preferably a cycle suitable for making the image 711 stand out (for example, it is inverted in several hundred milliseconds). Further, the conspicuous color is, for example, a color generally used to call attention or warning (for example, red or yellow). In this case, it is preferable that the image 720 is displayed in an inconspicuous color. Inconspicuous colors are, for example, colors that are generally not used to call attention or warning (eg, blue, green). Further, in the method of displaying the image 711 with a brightness higher than that of the image 720, for example, it is preferable that the brightness of the image 711 is several times the brightness of the image 720. Further, in the method of displaying the image 711 thicker than the image 720, for example, it is preferable that the thickness of the image 711 is several times the thickness of the image 720.

The above-mentioned methods can be combined as appropriate. For example, the image 711 can be displayed in a conspicuous color (for example, red) and can be displayed blinking. Further, a warning sound may be generated together with the display of the warning image. The warning sound may be a voice warning that there is a possibility of deviation, or a voice notifying the direction of deviation. When generating a warning sound, for example, the control unit 110 may generate a warning sound in the navigation device 200, or generate a warning sound in an existing speaker (not shown) via the CAN 500. May be good.

In the present embodiment, a method of making the image 711 stand out more than the image 720 by blinking the image 711 is adopted. In this way, when there is a possibility of deviation (step S103: YES) and it is determined that there is no intention to change lanes (step S106: NO), a warning image indicating the deviation direction is displayed. It is possible to inform the viewer 10 not only that there is a possibility of deviation but also the direction of deviation.

On the other hand, when the control unit 110 determines that the driver intends to change lanes (step S106: YES), the control unit 110 displays a moving image in the display area 700 (step S108). The moving image is an image that notifies the viewer 10 by moving the image that the vehicle 1000 is changing lanes at the driver's will. Specifically, as shown in FIGS. 6 to 8, the moving image is an image including an image (for example, image 710 and image 720) showing a pair of boundary lines (for example, boundary line 610 and boundary line 620). It is an image (for example, image 710, image 720, and image 730) that moves in a direction opposite to the direction corresponding to the steering angle (for example, the left direction) (for example, the right direction).

Image 710 is an icon image imitating the boundary line 610, which is the boundary line on the left side of the traveling lane. Note that the image 710 is an image that is not highlighted, unlike the image 711. Further, the image 720 is an icon image imitating the boundary line 620 which is the boundary line on the right side of the traveling lane. Further, the image 730 is an icon image imitating the boundary line 630 which is the left boundary line of the left lane (for example, lane 650) of the traveling lane (for example, lane 640).

Immediately after the lane change is started, as shown in FIG. 6, as a moving image, an image (for example, boundary line 610 and boundary line 620) showing the boundary lines (for example, boundary line 610 and boundary line 620) on both sides of the traveling lane (for example, lane 640) is shown (for example, for example. Image 710 and image 720) are displayed.

Then, during the lane change, as shown in FIG. 7, an image (for example, image 710) showing the boundary lines (for example, boundary line 610 and boundary line 620) on both sides of the traveling lane (for example, lane 640) before the lane change is shown. And image 720) and an image (eg, image 710 and image 730) showing the boundaries (eg, boundary 610 and boundary 630) on both sides of the traveling lane (eg, lane 650) after the lane change. The image is displayed. It is sufficient to display one image (for example, image 710) showing the boundary line (for example, the boundary line 610) overlapping between the lane 640 and the lane 650.

Here, during the lane change, the moving image moves in the direction opposite to the moving direction of the vehicle 1000, as shown by the broken line arrow in FIG. The reason for this is the moving direction of the boundary line (for example, boundary line 610, boundary line 620 and boundary line 630) visually recognized as the background by the viewer 10 and the moving image (for example, image 710, image 720 and image 730). This is because it can be expected that the viewer 10 can be notified that the vehicle 1000 is moving in the moving direction without any discomfort by matching the moving direction with the moving direction. Of the moving images, the image outside the display area 700 is not displayed. For example, the image 730 is not displayed until a certain amount of time has passed since the lane change was started. On the other hand, the image 720 is not displayed immediately before the lane change is completed.

Here, the moving speed of the moving image will be described with reference to FIG. As mentioned above, it is desirable that the moving image move with a border that is visible as the background. Therefore, it is desirable that the moving speed of the moving image is a moving speed corresponding to the moving speed in the visual recognition area 600 of the boundary line visually recognized as the background. That is, the display unit 120 displays the moving image so that the larger the steering angle, the faster the moving speed of the moving image.

FIG. 9 shows how the steering angle changes when the lane is changed. t0 is the time when the lane change is started. t1 is the time immediately after the steering angle reaches the peak value (A1). t2 is the last time when the steering angle is maintained at the peak value. t3 is the time at which the steering angle becomes the minimum value when the steering angle is returned too much. t4 is the time when the lane change is completed. In FIG. 9, the sign of the steering angle is changed so that the steering angle becomes a positive value when the vehicle 1000 moves to the left and the steering angle becomes a negative value when the vehicle 1000 moves to the right. It is set.

As shown in FIG. 9, when changing lanes, the steering angle gradually increases with the start of the lane change and reaches a peak value by the time the vehicle enters the desired lane. Then, after maintaining the peak for a certain period of time, the steering angle gradually decreases from the peak value as the driver returns the steering to the original position. Here, the steering angle fluctuates little by little during the lane change. Further, the steering angle may once swing in the opposite direction when the lane change is completed. However, it is preferable to determine the moving speed of the moving image without considering the small fluctuations and the deflection in the opposite direction, and to keep the moving speed of the moving image constant in one lane change. According to such a configuration, it is possible to realize a stable display of a moving image.

As described above, the steering angle at the time of changing lanes basically changes with the passage of time, but it is general that the state in which the steering angle reaches the peak value continues for a certain period of time. Therefore, it is preferable to specify the peak value of the steering angle and move the moving image in the display area 700 at a moving speed corresponding to the peak value of the steering angle in a direction opposite to the moving direction of the vehicle 1000.

The moving image may be moved at a moving speed according to the steering angle specified from the rate of change of the steering angle instead of the peak value of the steering angle. For example, it is possible to adopt a moving speed according to the average amount of change in the steering angle when the steering angle is increased. This average amount of change is the ratio of the peak value of the steering angle to the time required for the steering angle to reach the peak value from 0 degrees. Further, for example, it is possible to adopt a moving speed according to the steering angle when the rate of change of the steering angle reaches the first value and then decreases to the second value smaller than the first value.

When the process of step S104, the process of step S107, or the process of step S108 is completed, the control unit 110 determines whether or not the ignition (ignition switch) is off (step S109). When the control unit 110 determines that the ignition (ignition switch) is not off (step S109: NO), the control unit 110 returns the process to step S101. On the other hand, when the control unit 110 determines that the ignition is off (step S109: YES), the control unit 110 completes the display control process.

In the present embodiment, when the possibility that the vehicle 1000 deviates from the traveling lane is detected, a warning image indicating the deviation direction, which is the direction in which the vehicle 1000 may deviate, is displayed. Therefore, according to the present embodiment, it is possible to clearly present the direction in which the vehicle 1000 may deviate.

Further, in the present embodiment, it is detected that there is a possibility of deviation based on the navigation information acquired from the navigation device 200 and the steering angle information acquired from the steering angle sensor 300. Here, the navigation device 200 is often mounted on the vehicle 1000, and the steering angle sensor 300 is generally mounted on the vehicle 1000. That is, in the present embodiment, it is not necessary to mount a special device such as an image pickup device on the vehicle 1000, and the cost can be reduced.

Further, in the present embodiment, the warning image (for example, image 710, image 720, and image 730) is superimposed on the boundary line (for example, boundary line 610, boundary line 620, and boundary line 630) visually recognized by the viewer 10. It is displayed without being displayed. Therefore, in the present embodiment, it is not necessary to perform complicated processing for superimposing the warning image on the visually recognized boundary line, and it is not necessary to accurately detect the position of the visually recognized boundary line. Therefore, according to the present embodiment, it is possible to present a direction that may deviate at low cost. On the other hand, it is considered that the correspondence between the visually recognized boundary line and the warning image is sufficiently clear even if the warning image is not superimposed on the visually recognized boundary line as in the present embodiment.

(Modification example)
Although the embodiments of the present invention have been described above, various modifications and applications are possible in carrying out the present invention.

In the present invention, which part of the configuration, function, and operation described in the above embodiment is adopted is arbitrary. Further, in the present invention, in addition to the above-described configurations, functions, and operations, further configurations, functions, and operations may be adopted. Further, the above-mentioned functions may be possessed by any device, and the above-mentioned functions may be executed as a whole system.

In the above embodiment, an example in which the moving image includes only images showing boundaries (image 710, image 720, and image 730) has been described. In the present invention, the moving image may include an information image showing information about the boundary line in addition to the image showing the boundary line. When the image showing the boundary line is the content to be displayed, the information image can be considered as auxiliary content. FIG. 10 shows a moving image which is a moving image displayed at the start of a lane change and includes an image showing a boundary line and an information image.

In FIG. 10, in addition to images 710 and image 720 showing a pair of boundary lines (boundary line 610 and boundary line 620) showing the boundary of the traveling lane on the road, image 721 which is an information image showing information about the boundary line 620 is shown. An example included in the moving image is shown. The image 721 is an image clearly indicating that the boundary line 620 is a center line, and is an image showing the character string "Center Line". However, the image 721 does not have to be an image showing a character string as long as it is an image different from the image 720. As shown in FIG. 10, at the start of the lane change, the image 721 is arranged above the image 720.

Here, since the image 710, the image 720, and the image 721 are all moving images, they move in the direction opposite to the moving direction of the vehicle 1000 in the display area 700 when the lane is changed. For example, when the vehicle 1000 changes lanes to the left lane, the images 710, 720, and 721 move to the right within the display area 700. In this case, the image 721 may immediately deviate from the display area 700. However, if the information presented by image 721 is important information, it is not desirable for image 721 to immediately deviate from the display area 700. Therefore, it is preferable to move the display position of the image 721 so that the image 721 does not immediately deviate from the display area 700.

For example, when the image 721 is likely to deviate from the display area 700, it is desirable to change the display position of the image 721 as shown in FIG. FIG. 11 shows an example in which the display position of the image 721 is moved from the upper side of the image 720 to the left side of the image 720. In this way, by displaying the information image on the moving direction side of the vehicle 1000 rather than the image showing the boundary line where the information is indicated by the information image, the time for the information image to be displayed in the display area 700 is lengthened. Can be done.

In this modified example, when the information image is likely to deviate from the display area 700, an example in which the information image moves to the moving direction side of the vehicle 1000 as viewed from the image showing the boundary line has been described. In the present invention, for example, the information image may be displayed on the moving direction side of the vehicle 1000 when viewed from the image showing the boundary line from the beginning.

In the above embodiment, the warning image (for example, image 710, image 720 and image 730) is not superimposed on the boundary line (for example, boundary line 610, boundary line 620 and boundary line 630) visually recognized by the viewer 10. The displayed example has been described. In the present invention, the warning image may be displayed superimposed on the visually recognized boundary line. In this case, for example, the display surface of the virtual image V is made substantially horizontal along the road surface. In such a configuration, the correspondence between the visually recognized boundary line and the warning image becomes clearer, and the deviation direction can be presented in a more understandable manner.

Further, in the above embodiment, the deviation detection unit 114 detects that there is a possibility of deviation based on the navigation information acquired from the navigation device 200 and the steering angle information acquired from the steering angle sensor 300. Was explained. In the present invention, the deviation detection unit 114 may deviate based on the captured image information acquired from the imaging device (for example, an in-vehicle camera) and the steering angle information acquired from the steering angle sensor 300. It may be detected. Further, when the steering angle can be estimated from the history of the navigation information, the deviation detection unit 114 may detect that there is a possibility of deviation based only on the navigation information. Similarly, if the steering angle can be estimated from the history of the captured image information, the deviation detection unit 114 may detect that there is a possibility of deviation based only on the captured image information.

In the above embodiment, an example in which the boundary line indicating the boundary of the lane is a straight line and the image showing the boundary line (warning image or moving image) is a substantially linear image has been described. In the present invention, the image showing the boundary line (warning image or moving image) may have a shape (for example, a curved shape) that matches the shape of the boundary line.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope of the present invention. Moreover, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is indicated by the scope of claims, not by the embodiment. Then, various modifications made within the scope of the claims and the equivalent meaning of the invention are considered to be within the scope of the present invention.

The present invention is applicable to a head-up display device used in a vehicle.

10 Visualizer 100 Head-up display device 110 Control unit 111 Navigation information acquisition unit 112 Steering angle information acquisition unit 113 Turn signal information acquisition unit 114 Deviation detection unit 115 Display control unit 120 Display unit 200 Navigation device 210 Windshield 300 Steering angle sensor 400 Turn signal 500 CAN
600 Visible area 610, 620, 630 Boundary line 640, 650 Lane 700 Display area 710, 711, 720, 721, 730 Image 1000 Vehicle N Display light V Virtual image

Claims (8)

A head-up display device that displays a virtual image so that it overlaps the scenery outside the vehicle.
Deviation detecting means for detecting that the vehicle may deviate from the driving lane, and
When the deviation detecting means detects the possibility, the vehicle is provided with a display means for displaying a warning image indicating the deviation direction which is the direction in which the vehicle may deviate .
Navigation information acquisition means for acquiring navigation information including road information regarding the road on which the vehicle travels, and
Further provided with a steering angle information acquisition means for acquiring steering angle information indicating the steering angle of the vehicle.
The deviation detecting means detects the possibility based on the navigation information and the steering angle information, and detects the possibility.
Further provided with a blinker information acquisition means for acquiring blinker information indicating the operating status of the left and right blinkers of the vehicle.
The display means corresponds to a direction corresponding to the steering angle indicated by the steering angle information and a blinker in operation indicated by the blinker information when the deviation detecting means detects the possibility. When the directions match, instead of the warning image, an image including an image showing a pair of boundary lines showing the boundary of the traveling lane on the road, in a direction opposite to the direction corresponding to the steering angle. Display a moving image, which is a moving image,
Head-up display device. The warning image is an image showing a pair of boundary lines showing the boundary of the traveling lane on the road, and is an image in which the image showing the boundary line on the deviation direction side is highlighted.
The head-up display device according to claim 1 . The warning image is an image in which an image showing a boundary line on the deviation direction side is blinking and displayed.
The head-up display device according to claim 2 . The warning image is an image in which the image showing the boundary line on the deviation direction side is displayed in a color different from the image showing the other boundary line.
The head-up display device according to claim 2 or 3 . The warning image is an image in which the image showing the boundary line on the deviation direction side is displayed with a higher brightness than the image showing the other boundary line.
The head-up display device according to any one of claims 2 to 4 . The warning image is an image in which the image showing the boundary line on the deviation direction side is displayed thicker than the image showing the other boundary line.
The head-up display device according to any one of claims 2 to 5 . The display means moves the moving image at a moving speed corresponding to the steering angle indicated by the steering angle information.
The head-up display device according to claim 1 . The moving image includes an image showing the first boundary line of the pair of boundary lines and an information image showing information about the first boundary line.
The display means displays the information image on the side corresponding to the steering angle with respect to the image showing the first boundary line.
The head-up display device according to claim 1 or 7 .

Images