Head-up display device and display control device

Abstract

The present invention provides a head-up display device and display control device capable of providing route guidance with excellent visibility. [Solution] The head-up display device 100 includes a guidance display means 400 that projects a guidance image onto a projection unit 500 to superimpose the guidance image onto the scenery, and a control means 310 that controls the content of the guidance image display. The control means 310 superimposes a guidance image indicating the direction the vehicle should turn as a route guidance image at the route guidance end position, and superimposes a guidance image indicating the direction the vehicle should not turn as a non-route guidance image at a non-route guidance end position located in the same direction as the direction the vehicle should turn.

Description

Technical Field

[0001] The present disclosure relates to a head-up display device and a display control device. More specifically, it relates to a head-up display device and a display control device that superimpose a guidance image on the scenery in front of the vehicle by projecting the guidance image onto a projection target part.

Background Art

[0002] Conventionally, a head-up display device for an AR (Augmented Reality) navigation device that superimposes virtual visual information (such as a route guidance image) on the scenery (real scene) in front of a vehicle in the real world has been proposed (see, for example, Patent Document 1).

[0003] In such a head-up display device, for example, at an intersection or the like, for a road (a road to be route-guided) where it is necessary to guide the traveling direction of the vehicle, a route guidance display (for example, an arrow image indicating the turning direction) is displayed, and for a road (a road outside the route guidance target) where it is not necessary to guide the traveling direction, a display indicating entry prohibition (entry prohibition display: display of an image in which a cross or a dash is superimposed on a circle) is performed. With the route guidance display, it becomes possible to actively guide the vehicle in the traveling direction, and with the entry prohibition display, it is possible to effectively suppress the vehicle from entering a road outside the route guidance target.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional head-up display systems have the problem that they display route guidance and no-entry signs for all possible roads (all selectable directions of travel) within an intersection, resulting in a large number of guidance images being displayed and reduced visibility.

[0006] This disclosure has been made in view of the above-mentioned problems, and aims to provide a head-up display device and a display control device that can provide route guidance with excellent visibility. [Means for solving the problem]

[0007] To solve the above problems, the head-up display device in the first embodiment includes a guidance display means that projects a guidance image onto a projection unit, thereby superimposing the guidance image onto the scenery in front of the vehicle, and a control means that controls the display content of the guidance image projected onto the projection unit. The control means acquires information indicating a route guidance end position for route guidance, superimposes the guidance image indicating the direction the vehicle should turn onto the route guidance end position as a route guidance image, acquires information indicating a non-route guidance end position that is closer to the vehicle than the route guidance end position and where the route guidance image is not superimposed, and superimposes the guidance image indicating the direction the vehicle should not turn onto the non-route guidance end position, which is located in the same direction as the direction the vehicle should turn onto, onto the non-route guidance end position as a non-route guidance image.

[0008] Furthermore, in a head-up display device according to a second embodiment which may be dependent on the first embodiment, the control means may change the display of the route guidance image so as to recognize that the driver of the vehicle has moved from the near side to the far side, and then superimpose the route guidance image onto the end position of the route guidance.

[0009] Furthermore, in order to solve the above problems, the display control device in the third embodiment is a display control device that controls a head-up display device that superimposes a guidance image onto the scenery in front of the vehicle by projecting the guidance image onto a projection unit, and has control means for controlling the display content of the guidance image projected onto the projection unit, wherein the control means acquires information indicating a route guidance end position for route guidance, superimposes the guidance image indicating the direction the vehicle should turn as a route guidance image onto the route guidance end position, acquires information indicating a non-route guidance end position that is closer to the vehicle than the route guidance end position and does not superimpose the route guidance image onto the non-route guidance end position which is located in the same direction as the direction the vehicle should turn, and superimposes the guidance image indicating the direction the vehicle should not turn as a non-route guidance image onto the non-route guidance end position which is located in the same direction as the direction the vehicle should turn.

[0010] Furthermore, in a display control device according to a fourth embodiment which may be dependent on the third embodiment, the control means may change the display of the route guidance image so as to recognize that the driver of the vehicle has moved from the near side to the far side, and then superimpose the route guidance image onto the end position of the route guidance. [Effects of the Invention]

[0011] The head-up display device and display control device of this disclosure make it possible to provide guidance displays with excellent visibility. [Brief explanation of the drawing]

[0012] [Figure 1] This is a block diagram showing the schematic configuration of an in-vehicle system including a head-up display device. [Figure 2] This is an overhead image schematically illustrating the road conditions to which the start and end processing of the guidance images are applied. [Figure 3] This is a flowchart showing the display and deletion process (first half) of the guidance image. [Figure 4] This flowchart shows the process of displaying and hiding the guidance image (second half). [Figure 5]This is a flowchart showing the route guidance image display process (S.03) in Figure 3. [Figure 6] This figure shows the animation processing of the route guidance image G1, where (a) shows the route guidance image displayed on the near side, (b) shows the route guidance image displayed in the middle position, and (c) shows the route guidance image displayed on the far side. [Figure 7] This figure shows the superimposed display of the "route guidance image" G1 and the "non-route guidance image" G2. [Modes for carrying out the invention]

[0013] The head-up display device of this disclosure will be described in detail below, using an example and drawings. Figure 1 is a block diagram showing the schematic configuration of an in-vehicle system including the head-up display device. The in-vehicle system 1 is installed in a vehicle.

[0014] The in-vehicle system 1 includes a vehicle ECU (Electronic Control Unit) 10, a vehicle position detection device 20, a navigation device 30, a driver monitoring device 40, and a head-up display device 100. The head-up display device 100 also includes an information acquisition unit 200, a display control unit (display control device) 300, and a guidance display unit 400.

[0015] The vehicle ECU 10 is a device that controls all systems mounted on the vehicle, and performs controls related to vehicle travel such as, for example, brake operation, engine control, steering status of the steering, and steering assistance. Also, in order to perform the above-described controls, the vehicle ECU 10 has information related to vehicle travel such as vehicle speed, inclination state of the vehicle, and travel distance. In the head-up display device 100, by acquiring information (vehicle travel information) related to vehicle speed, inclination state of the vehicle, etc. from the vehicle ECU 10, it is possible to superimpose and display virtual visual information (guidance image, etc.) on the actual scene. The vehicle travel information acquired from the vehicle ECU 10 is output to the information acquisition unit 200 and the navigation device 30.

[0016] The own-vehicle position detection device 20 is a device that detects the position of the vehicle, and generally, a GPS (Global Positioning System) device is used. The position information of the vehicle detected by the own-vehicle position detection device 20 is output to the information acquisition unit 200 and the navigation device 30.

[0017] The navigation device 30 acquires vehicle travel information from the vehicle ECU 10, acquires the position information of the vehicle from the own-vehicle position detection device (GPS device) 20, and uses the map information recorded in the map information recording means (not shown) to perform route search and route guidance for guiding the vehicle to the destination. For example, based on the route information to the destination, the navigation device 30 detects the position of the intersection where a right turn or a left turn should be made, and performs a route guidance display for a right turn operation or a left turn operation, etc. in front of a predetermined distance from the intersection for the driver.

[0018] Also, the navigation device 30 has information on "route guidance end position", "route guidance start position", "non-route guidance end position", and "non-route guidance start position" based on the vehicle travel information, position information, and map information. The information on the "route guidance end position" means information related to the position in the real world (real space position) of the intersection where the vehicle should make a right turn or a left turn (see the "route guidance end position" shown in FIG. 2).

[0019] The information of the "route guidance start position" means information regarding a position in the real world where the control unit 310 of the head-up display device 100 starts a process of visually recognizing for the driver the position of an intersection where a right or left turn should be made, using the "route guidance image" described later (refer to the "route guidance start position" shown in FIG. 2).

[0020] The information of the "non-route guidance end position" means information regarding a position in the real world that is a road connecting to an intersection or the like in the real world existing between the "route guidance start position" and the "route guidance end position", and where the vehicle is not allowed to make a right or left turn (refer to the "non-route guidance end position A" and the "non-route guidance end position B" shown in FIG. 2). When there are multiple "non-route guidance end positions", multiple pieces of such information are set.

[0021] The information of the "non-route guidance start position" means information regarding a position in the real world where the display control unit 300 of the head-up display device 100 starts a process of visually recognizing for the driver the position of an intersection where a right or left turn is not allowed, using the "non-route guidance image" described later (refer to the "non-route guidance start position" shown in FIG. 2).

[0022] Note that the distance in the real space from the "route guidance start position" to the "route guidance end position" is referred to as the "distance zone for route guidance" (refer to the "distance zone for route guidance" shown in FIG. 2). While the vehicle is traveling in the "distance zone for route guidance" in the real world, the control unit 310 continuously performs a process of superimposing and displaying the "route guidance image" at the position of the intersection where a right or left turn should be made in the real world.

[0023] Furthermore, the distance in real space from the "non-route guidance start position" to the "non-route guidance end position" is referred to as the "non-route guidance distance zone." If there are multiple "non-route guidance start positions" and "non-route guidance end positions," multiple "non-route guidance distance zones" are also set (see "non-route guidance distance zone A" and "non-route guidance distance zone B" shown in Figure 2). While the vehicle is traveling through the "non-route guidance distance zone" in the real world, the control unit 310 continuously performs the process of superimposing the "non-route guidance image" onto the location of intersections in the real world where turning right or left is prohibited.

[0024] Furthermore, the navigation device 30 has "direction information" that indicates whether to guide the vehicle to turn right (right turn guidance) or left (left turn guidance) at the "non-route guidance end position" during route guidance. For example, if the "direction information" is for a right turn, an arrow icon image or the like indicating a right turn will be projected onto the windshield (projection area) 500 as a route guidance image. Similarly, if the "direction information" is for a left turn, an arrow icon image or the like indicating a left turn will be projected onto the windshield 500 as a route guidance image.

[0025] The navigation device 30 outputs the above-mentioned information of "end position for route guidance," "start position for route guidance," "end position for non-route guidance," and "start position for non-route guidance," as well as "direction information," to the information acquisition unit 200.

[0026] The driver monitoring device 40 is a device that detects the driver's head and eye position, gaze direction, eye opening rate, etc., and is generally composed of cameras that photograph the driver's head and eyes. Based on the detected information, the driver monitoring device 40 acquires and calculates information regarding the gaze direction and position of the driver's left and right eyes as eye position information. The eye position information acquired and calculated by the driver monitoring device 40 is output to the information acquisition unit 200.

[0027] The information acquisition unit 200 includes a vehicle information acquisition unit 210, a route guidance information acquisition unit 220, a location information acquisition unit 230, and an eye position information acquisition unit 240. The vehicle information acquisition unit 210 acquires vehicle driving information from the vehicle ECU 10 and outputs it to the control unit 310 of the display control unit 300, which will be described later. The route guidance information acquisition unit 220 acquires information on the "end position of route guidance," "start position of route guidance," "end position of non-route guidance" and "start position of non-route guidance" (hereinafter referred to as "start / end position information") and "direction information" from the navigation device 30 and outputs it to the control unit 310 of the display control unit 300. The location information acquisition unit 230 acquires vehicle location information from the vehicle position detection device 20 and outputs it to the control unit 310 of the display control unit 300. The eye position information acquisition unit 240 outputs eye position information acquired from the driver monitoring device 40 to the control unit 310 of the display control unit 300.

[0028] The display control unit 300 comprises a control unit 310 and a guidance information recording unit 320. The guidance information recording unit 320 records data related to guidance displays for the driver to view (image information such as route guidance images and non-route guidance images). Specifically, it records image data for route guidance displays, consisting of arrow images (arrow icons: route guidance images) indicating the direction of travel of the vehicle, and image data for no-entry displays, consisting of images indicating no entry for vehicles (icons with a circle and an X or - superimposed on it: non-route guidance images). In addition, it records image data related to information that should be viewed by the driver as needed (for example, vehicle speed information and sign information).

[0029] The control unit 310 processes information acquired from the information acquisition unit 200 (vehicle driving information, start / end position information, direction information, vehicle position information, eye position information) to display guidance images (route guidance images, non-route guidance images) in a way that is visible to the driver. In particular, the control unit 310 can switch between displaying the guidance images (route guidance images, non-route guidance images) perceived (visible) by the driver in two dimensions or in three dimensions. Furthermore, when displaying the guidance image in three dimensions, the control unit 310 processes the expression depth (visible distance) of the guidance image (virtual image relative to the real scene) that is visible to the driver. Through the processing of the control unit 310, the guidance image can be moved closer to or further away from the driver, allowing the driver to visually focus on the guidance image. In addition, the processing of the control unit 310 can add distance information to the guidance image, making it possible to adjust the display position of the guidance image to superimpose it on the real scene.

[0030] The control unit 310 identifies a viewing angle corresponding to the perceived distance (distance from the driver's viewpoint to a predetermined real-space position) based on eye position information and vehicle tilt information (vehicle driving information) acquired from the information acquisition unit 200, and controls the size of the guidance image variably by performing image rendering processing based on the perceived distance and the identified viewing angle. The control processing of the guidance image in the control unit 310 has already been disclosed in, for example, Japanese Patent Application Publication No. 2019-127065, so a detailed explanation is omitted here.

[0031] Furthermore, the control unit 310 not only controls the guidance images but also performs display and deletion processing of the guidance images shown in Figures 3 to 5 based on the vehicle driving information, start and end position information, direction information, and vehicle position information acquired from the information acquisition unit 200. This processing will be described later.

[0032] The guidance display unit 400 has a display unit 410 and a reflector unit 420. The display unit 410 has an image display unit 412 and a light ray separation unit 414. The image display unit 412 is a liquid crystal display device or the like, and has an image display surface for displaying guidance image data acquired from the control unit 310. The light ray separation unit 414 has a lenticular lens or a parallax barrier, and separates the light emitted from the image display surface of the image display unit 412 into light rays for the left and right eyes. The light rays separated by the light ray separation unit 414 are output to the reflector unit 420.

[0033] The reflective section 420 includes a curved mirror (concave mirror, etc.). The curved mirror reflects the light received from the light separation section 414 and projects the image display light onto the windshield (projection section) 500. The reflective section 420 is also equipped with other optical components (lenses, auxiliary reflectors, etc.) as needed.

[0034] When the display light is projected onto the windshield 500 by the curved mirror of the reflective section 420, a parallax view image (parallax image) for each of the left and right eyes is displayed in front of the driver. By viewing this view image with both eyes, the driver perceives a guidance image with depth perception.

[0035] Figures 3 to 5 are flowcharts showing the display and erasure processes of the guidance image by the control unit 310. The processing of the control unit 310 will be explained using Figures 3 to 5.

[0036] First, the control unit 310 acquires "start and end position information" and "direction information" from the navigation device 30 via the route guidance information acquisition unit 220 of the information acquisition unit 200 (S.01).

[0037] In a typical navigation system, when the vehicle approaches a turn, the navigation system starts providing route guidance from a predetermined distance before the turn. For example, when the vehicle reaches a position 300m before the intersection where it should turn, the navigation system 30 provides voice guidance such as "Turn left 300m ahead" and outputs information to the head-up display device 100 to display a route guidance image prompting the vehicle to turn left (for example, a route guidance image in the shape of a "<"). In the navigation system 30 according to this embodiment, when the vehicle approaches a position ("route guidance start position") that is a predetermined distance before the position where it should turn ("route guidance end position"), the system outputs information on the "route guidance end position," "route guidance start position," "non-route guidance end position," and "non-route guidance start position," as well as "direction information," to the control unit 310.

[0038] Figure 2 is a schematic overhead view showing an example of a road situation (near an intersection) to which the start and end processing of the guidance images shown in Figures 3 to 5 is applied in the in-vehicle system 1 according to the embodiment. In the in-vehicle system 1 according to the embodiment, there are two four-way intersections between the "route guidance start position" and the "route guidance end position," and two "non-route guidance start positions" ("non-route guidance start position A" and "non-route guidance start position B") and two "non-route guidance end positions" ("non-route guidance end position A" and "non-route guidance end position B") are set at each intersection to prevent the vehicle from making a left turn. When a vehicle travels from the bottom to the top of Figure 2, the start and end processing of the guidance images shown in Figures 3 to 5 is initiated when the vehicle reaches the "route guidance start position."

[0039] Furthermore, as shown in Figure 2, the range from the "route guidance start position" to the "route guidance end position" is called the "route guidance distance zone," the range from the "non-route guidance start position A" to the "non-route guidance end position A" is called the "non-route guidance distance zone A," and the range from the "non-route guidance start position B" to the "non-route guidance end position B" is called the "non-route guidance distance zone B." As already explained, the "route guidance image" is displayed superimposed on the actual "route guidance end position" while the vehicle is traveling through the "route guidance distance zone." The "non-route guidance image" is displayed superimposed on the actual "non-route guidance end position A" while the vehicle is traveling through the "non-route guidance distance zone A," and superimposed on the actual "non-route guidance end position B" while the vehicle is traveling through the "non-route guidance distance zone B."

[0040] In the process of S.01, the control unit 310 determines whether it was able to obtain information from the navigation device 30 regarding the "end position of route guidance," "start position of route guidance," "end position of non-route guidance," and "start position of non-route guidance" (start and end position information), as well as "direction information" (S.02). If it was not possible to obtain the "start and end position information" and "direction information" from the navigation device 30 (No in S.02), the control unit 310 terminates the display and erasure process of the guidance image. After that, the control unit 310 executes the display and erasure process of the guidance image again, and repeats the process from S.01.

[0041] On the other hand, if the control unit 310 can obtain "start / end position information" and "direction information" from the navigation device 30 (Yes in S.02), the control unit 310 executes the "route guidance image display processing" shown in Figure 5 (S.03).

[0042] In the "route guidance image display processing," the control unit 310 first confirms and erases the "guidance images" ("route guidance images" and "non-route guidance images") displayed on the windshield 500 (S.21 in Figure 5). In the processes of S.01 and S.02 shown in Figure 3, no process is performed to display the "guidance images" on the windshield 500. However, if the processes from S.02 onward were executed while the "guidance images" were still displayed on the windshield 500, it would interfere with the "guidance image display / erasure processing" according to this embodiment. Therefore, the control unit 310 confirms and erases the "guidance images" ("route guidance images" and "non-route guidance images") that may be displayed on the windshield 500.

[0043] Subsequently, the control unit 310 determines whether the "direction information" is a right-turn or left-turn guidance (S.22), and obtains an arrow icon image indicating the corresponding direction from the guidance information recording unit 320 (S.23). Then, as shown in Figure 6(a), the control unit 310 projects (displays) the "route guidance image" onto the windshield 500 so that the driver can see (perceive) the "route guidance image" at the closest position (S.24). After that, it performs an animation display process that creates the perception that the projected (displayed) "route guidance image" is moving through space from the near side to the far side (flying through space, moving to the distance) (S.25), and finally superimposes the moved "route guidance image" onto the "route guidance end position" in the actual scenery (S.26). Specifically, as already explained, the control unit 310 changes the size and position of the projected (displayed) "route guidance image" based on the perceived distance and viewing angle, thereby causing the driver to perceive (recognize) that the "route guidance image" is moving from the near side to the far side.

[0044] Figures 6(a) to 6(c) schematically illustrate the animation display process in which the "route guidance image" moves from the foreground to the background. The "route guidance image" G1 (see Figure 6(a)) displayed closest to the viewer is smoothly moved towards the background by the animation display process (see Figure 6(b)), and is finally displayed superimposed on the "end position of the route guidance" in the actual scene (see Figure 6(c)).

[0045] In this way, by smoothly (continuously) moving the "route guidance image" from the foreground to the background using animation display processing (S.25), the presence of the "route guidance image" can be made to the driver (attract their attention). Furthermore, after moving from the foreground to the background, by displaying the "route guidance image" superimposed on the "end position of the route guidance" in the actual scenery (S.26), it becomes possible to consciously recognize the distance to the point where the vehicle should turn (end position of the route guidance).

[0046] After processing the route guidance image (S.03 in Figure 3, Figure 5), the control unit 310 acquires the vehicle's location information from the location information acquisition unit 230 via the information acquisition unit 200 (S.04). The control unit 310 may also acquire vehicle driving information from the vehicle ECU 10 as needed. Based on the vehicle driving information, the control unit 310 can acquire information on the vehicle's mileage. Based on the location information, or based on the mileage from the route guidance start position or the non-route guidance start position, the control unit 310 can determine whether the vehicle is traveling in the "route guidance distance zone," "non-route guidance distance zone A," or "non-route guidance distance zone B."

[0047] Next, the control unit 310 determines whether the vehicle has reached the "non-route guidance start position" based on the acquired vehicle "location information" and "vehicle driving information" (S.05). If the vehicle has reached the "non-route guidance start position" (Yes in S.05), the control unit 310 projects (displays) the "non-route guidance image" onto the windshield 500 so as to superimpose it on the "non-route guidance end position" (S.06).

[0048] In this case, if the control unit 310 determines from the "direction information" that the direction for route guidance is a right turn (right turn guidance), it superimposes the non-route guidance image only at the entrance position of the road leading to the right turn at the intersection corresponding to the "non-route guidance end position," and does not display the non-route guidance image at the entrance position of the road leading to the left turn. In this way, by superimposing the non-route guidance image only at the entrance position of the road in the direction that matches the direction in which the vehicle's route guidance is performed (more specifically, the direction guided by the route guidance image) based on the "direction information," it is possible to suppress the display of non-route guidance images at the entrance positions of roads in all directions at the intersection of non-route guidance positions. Therefore, it is possible to prevent the display of many non-route guidance images, which would reduce visibility in the actual scenery, and to provide guidance displays with excellent visibility.

[0049] In particular, the in-vehicle system 1 according to this embodiment performs a process to make it easier to recognize the direction of the route guidance (direction of right turn guidance or left turn guidance) by displaying the route guidance display as an animation. Therefore, by displaying non-route guidance images only in directions that have already been recognized (aware), it is possible to effectively prevent drivers from mistakenly turning at intersections where they should not turn.

[0050] Figure 7 shows how the "route guidance image" G1 and the "non-route guidance image" G2 are superimposed on the real-world scene via the windshield 500. In Figure 7, the "non-route guidance image" G2 is represented by an icon image of a horizontal line inside a circle. Corresponding to the "route guidance image" G1 being an arrow icon image indicating a left turn, the "non-route guidance image" G2 is superimposed only at the entrance position leading to the left-hand road at the intersection.

[0051] If the vehicle has not reached the "non-route guidance start position," or if the vehicle has already passed the "non-route guidance start position" (No in S.05), the control unit 310 determines whether the vehicle has reached the "non-route guidance end position" (S.07). If the vehicle has reached the "non-route guidance end position" (Yes in S.07), the control unit 310 performs a process to erase the "non-route guidance image" that was superimposed on the "non-route guidance end position" (S.08).

[0052] As shown in Figure 2, if there are multiple "non-route guidance start positions" and "non-route guidance end positions" (e.g., "non-route guidance start position A" and "non-route guidance end position A", "non-route guidance start position B" and "non-route guidance end position B"), the control unit 310 will perform the following processes for each "non-route guidance start position" and "non-route guidance end position": the S.05 process for determining when the "non-route guidance start position" has been reached, the S.06 process for displaying the non-route guidance image, the S.07 process for determining when the "non-route guidance end position" has been reached, and the S.08 process for deleting the non-route guidance image.

[0053] After performing the process of deleting the non-route guidance image that was superimposed on the "non-route guidance end position" (S.08), the control unit 310 determines whether the vehicle has reached the "route guidance end position" (S.09). If the vehicle has not reached the "route guidance end position" (No in S.09), or if the vehicle has not reached the "non-route guidance end position" in S.07 as described above (No in S.07), the control unit 310 adjusts the display position of the guidance image ("route guidance image", "non-route guidance image") projected (displayed) on the windshield 500 so that it is superimposed on the "route guidance end position" or "non-route guidance end position" in the actual scenery, based on the "location information" of the vehicle acquired in S.04 (S.10), and then proceeds to S.04.

[0054] On the other hand, when the vehicle reaches the "end of route guidance position" (Yes in S.09), the control unit 310 performs a process to enlarge the "route guidance image" that was projected onto the windshield 500 (a process to make the "route guidance image" easier for the driver to perceive) (S.11). By enlarging the "route guidance image," it is possible to emphasize that it is time to change lanes. Then, the control unit 310 acquires the vehicle's "location information" (and "vehicle driving information" if necessary) from the vehicle ECU 10 and the location information acquisition unit 230 (S.12) and determines whether the vehicle has turned at the end of route guidance position (S.13).

[0055] If the vehicle has not turned at the end of the route guidance (No in S.13), the control unit 310 proceeds to S.11 and repeatedly executes the above-described process (S.11 to S.13) until the vehicle turns at the end of the route guidance. If the vehicle has turned at the end of the route guidance (Yes in S.13), the control unit 310 performs the process of erasing the "route guidance image" that was projected onto the windshield 500 (S.14), and terminates the display and erasing process of the guidance image shown in Figures 3 to 5.

[0056] Although the head-up display device and display control device of this disclosure have been described in detail above with reference to the drawings, the head-up display device and display control device of this disclosure are not limited to the configuration of the head-up display device 100 and display control unit 300 shown in the embodiment.

[0057] For example, in the head-up display device 100 according to the embodiment, the control unit 310 acquires information on the "end position of route guidance," "start position of route guidance," "end position of non-route guidance," and "start position of non-route guidance" from the navigation device 30, and based on the vehicle's position information acquired from the vehicle position detection device 20, it performs a determination process (S.05, S.07, S.09 in Figure 3) to determine whether the vehicle has reached the "end position of route guidance," "start position of route guidance," "end position of non-route guidance," or "start position of non-route guidance."

[0058] However, the determination of whether a vehicle has reached the "end of route guidance," "start of route guidance," "end of non-route guidance," or "start of non-route guidance" is not necessarily limited to processing based solely on this location information. For example, the control unit 310 may acquire distance information from the navigation device 30 as "route guidance distance" from the "end of route guidance" to the "start of route guidance," and then determine whether the vehicle has reached the "end of route guidance" or the "start of route guidance" based on the vehicle's mileage in the vehicle driving information, using either the "end of route guidance" or the "start of route guidance" information and the "route guidance distance" information.

[0059] Similarly, the control unit 310 may acquire distance information from the navigation device 30 as "non-route guidance distance" from the "non-route guidance end position" to the "non-route guidance start position," and based on the information of either the "non-route guidance end position" or the "non-route guidance start position" and the "non-route guidance distance," determine whether the vehicle has reached the "non-route guidance end position" or the "non-route guidance start position" based on the vehicle's mileage in the vehicle travel information. [Explanation of Symbols]

[0060] 1 ... In-vehicle systems 10 ... Vehicle ECU 100 ... Head-up display device 20 ... Vehicle position detection device 30…Navigation device 40... Driver monitoring device 200…Information acquisition department 210 ... Vehicle Information Acquisition Unit 220 ...Route guidance information acquisition unit 230...location information acquisition unit 240...Eye position information acquisition unit 300 ... Display control unit (display control device) 310 ... Control unit (control means) 320 ... Information Recording Department 400 ... Information display unit (information display means) 410...Display section 412 ...Image display section 414...Light beam separation section 420...Reflector 500 ... Windshield (projected area) G1... Route guidance image G2... Non-route guidance image

Claims

1. A guidance display means that projects a guidance image onto a projection area, thereby superimposing the guidance image onto the scenery in front of the vehicle, Control means for controlling the display content of the guide image projected onto the projection area. It has, The control means is, Information indicating the end position of the route guidance is obtained, and the guidance image showing the direction the vehicle should turn is superimposed as the route guidance image at the end position of the route guidance. Information is obtained indicating a non-route guidance end position that is closer to the vehicle than the aforementioned route guidance end position and where the route guidance image is not superimposed. For the non-route guidance end position located in the same direction as the vehicle should turn, the guidance image indicating that the vehicle should not turn is superimposed as a non-route guidance image. A head-up display device characterized by the following features.

2. The control means changes the display of the route guidance image to recognize that the driver of the vehicle has moved from the near side to the far side, and then superimposes the route guidance image onto the end position of the route guidance. The head-up display device according to feature 1.

3. A display control device for controlling a head-up display device that superimposes a guidance image onto the scenery in front of the vehicle by projecting the guidance image onto a projection surface, Control means for controlling the display content of the guide image projected onto the projection area. It has, The control means is, Information indicating the end position of the route guidance is obtained, and the guidance image showing the direction the vehicle should turn is superimposed as the route guidance image at the end position of the route guidance. Information is obtained indicating a non-route guidance end position that is closer to the vehicle than the aforementioned route guidance end position and where the route guidance image is not superimposed. For the non-route guidance end position located in the same direction as the vehicle should turn, the guidance image indicating that the vehicle should not turn is superimposed as a non-route guidance image. A display control device characterized by the following:

4. The control means changes the display of the route guidance image to recognize that the driver of the vehicle has moved from the near side to the far side, and then superimposes the route guidance image onto the end position of the route guidance. The display control device according to claim 3.

Images