JP7206867B2 - Display controller and display control program - Google Patents

Description

The disclosure in this specification relates to a display control device and a display control program for displaying a virtual image.

Patent Literature 1 discloses a vehicle display device. This vehicular display device displays a guidance image that guides the driver to change lanes in the forward field of view of the passenger.

WO2015/118859

In general, the preferred inter-vehicle distance between the own vehicle and the preceding vehicle increases as the traveling speed of the own vehicle increases. If such a preferable inter-vehicle distance cannot be ensured, it is conceivable to implement an inter-vehicle warning to increase the inter-vehicle distance using a vehicle display device as disclosed in Patent Document 1. However, the inter-vehicle distance warning may give a troublesome impression to the driver.

An object of the disclosure is to provide a display control device and a display control program that allow the driver to grasp a preferable inter-vehicle distance according to the traveling speed while suppressing a complicated impression.

The multiple aspects disclosed in this specification employ different technical means to achieve their respective objectives. In addition, the symbols in parentheses described in the claims and this section are examples showing the corresponding relationship with the specific means described in the embodiment described later as one aspect, and limit the technical scope. is not.

One of the disclosed display control devices is a display control device that is used in a vehicle (A) and controls the display of a virtual image (Vi) that is superimposed on a superimposition target in the foreground of the driver. A speed acquisition unit (200) that acquires speed, and an information display image (Di) that is displayed as a virtual image in the foreground and presents information to the driver. display generation unit ( 207) and

One of the disclosed display control programs is a display control program used in a vehicle (A) for controlling display of a virtual image (Vi) superimposed on a superimposition target in the foreground of the driver, at least one The processing unit (20a) is a speed acquisition unit (200) that acquires the running speed of the vehicle, and an information display image (Di) that is displayed as a virtual image in the foreground and presents information to the driver. A travel direction image is generated to notify the planned direction, and the lower the travel speed is, the lower the travel direction image is. It functions as a display generation unit (207) that controls the display to be displayed.

According to these disclosures, the uppermost position of the virtual image superimposed on the foreground is higher as the running speed is higher. Therefore, when a preceding vehicle is present in the foreground, the higher the traveling speed of the vehicle, the longer the inter-vehicle distance in which the preceding vehicle and the traveling direction image as the information display image do not overlap. As described above, the traveling direction image can present a preferable inter-vehicle distance according to the running speed, in addition to the information originally presented, based on the positional relationship with the preceding vehicle. Therefore, it is possible to present a preferable inter-vehicle distance to the driver according to the running speed while suppressing a complicated impression.

1 is a diagram showing an example of a schematic configuration of a vehicle system; FIG. It is a figure which shows the mounting example to the vehicle of HUD. It is a figure which shows an example of a schematic structure of HCU. It is a figure which shows an example of information presentation. It is a figure which shows the change of information presentation according to the running speed of a vehicle. It is a figure which shows an example of information presentation. 4 is a flowchart showing an example of display processing performed by an HCU;

(First embodiment)
A display control device according to the first embodiment will be described with reference to FIGS. 1 to 7. FIG. The vehicle system 1 is used in a vehicle A such as an automobile that travels on the road. The vehicle system 1 includes, as an example, an HMI (Human Machine Interface) system 2, an ADAS (Advanced Driver Assistance Systems) locator 3, a peripheral monitoring sensor 4, and a driving support ECU 6, as shown in FIG. The HMI system 2, the ADAS locator 3, the surroundings monitoring sensor 4, the driving support ECU 6, the navigation device 7, and the vehicle speed sensor 8 are connected to, for example, an in-vehicle LAN.

The ADAS locator 3 includes a GNSS (Global Navigation Satellite System) receiver 30, an inertial sensor 31, and a map database (hereinafter referred to as map DB) 32, as shown in FIG. The GNSS receiver 30 receives positioning signals from multiple satellites. The inertial sensor 31 includes, for example, a gyro sensor and an acceleration sensor. The ADAS locator 3 combines the positioning signals received by the GNSS receiver 30 and the measurement results of the inertial sensor 31 to sequentially locate the vehicle position of the own vehicle. Note that the ADAS locator 3 may use the traveling distance or the like obtained from the detection results sequentially output from the vehicle speed sensor 8 mounted on the own vehicle for locating the vehicle position. The ADAS locator 3 outputs the determined vehicle position to the in-vehicle LAN.

The map DB 32 is a non-volatile memory and stores map data such as link data, node data, and road shapes. The link data includes data such as a link ID specifying a link, link length indicating the length of the link, link direction, link travel time, node coordinates of the start and end of the link, and road attributes. The node data includes a node ID with a unique number assigned to each node on the map, node coordinates, node name, node type, connection link ID describing the link ID of the link connecting to the node, intersection type, etc. consists of

Further, as the map data, a three-dimensional map consisting of point groups of characteristic points of road shapes and structures may be used. You may use it as information. When using this three-dimensional map, the ADAS locator 3 uses LIDAR (Light Detection and Ranging/Laser The vehicle position of the own vehicle is identified using the detection results of the peripheral monitoring sensor 4 such as Imaging Detection and Ranging. Note that the map data may be acquired from outside the vehicle A using an in-vehicle communication module mounted on the vehicle A. FIG.

The surroundings monitoring sensor 4 is an autonomous sensor that monitors the surroundings of the vehicle. The surroundings monitoring sensor 4 detects moving objects such as pedestrians, animals other than humans, and vehicles other than the own vehicle, road markings such as fallen objects on the road, guardrails, curbs, lane markings, and trees. Detect objects around the vehicle, such as stationary static targets.

For example, the surroundings monitoring sensor 4 includes a surroundings monitoring camera that captures a predetermined range around the vehicle, and a millimeter-wave radar, sonar, LIDAR, or other detection wave sensor that transmits detection waves to a predetermined range around the vehicle. The peripheral monitoring camera sequentially outputs captured images to the in-vehicle LAN as sensing information. The surveying wave sensor sequentially outputs scanning results based on received signals obtained when reflected waves reflected by an object are received as sensing information to the in-vehicle LAN. The perimeter monitoring sensor 4 of the first embodiment includes at least a front camera 41 that captures a predetermined range in front of the vehicle. The front camera 41 is provided, for example, on the rearview mirror of the vehicle, on the upper surface of the instrument panel, or the like.

The driving support ECU 6 executes an automatic driving function that substitutes for the driver's driving operation. The driving support ECU 6 recognizes the driving environment of the own vehicle based on the vehicle position and map data of the own vehicle acquired from the ADAS locator 3 and sensing information from the surroundings monitoring sensor 4 . For example, the driving support ECU 6 recognizes the lane line from the imaging data of the front camera 41, and, among the other vehicles running in front of the vehicle A, drives in the same lane as the vehicle A is running. A preceding vehicle LV is detected. Further, the driving support ECU 6 may detect the preceding vehicle LV based on information from other probe wave sensors or the like. When the preceding vehicle LV is detected, the driving support ECU 6 sequentially outputs the detection information to the HCU 20 . The driving support ECU 6 does not output detection information when the preceding vehicle LV is not detected. Alternatively, the driving assistance ECU 6 may output information indicating that the preceding vehicle LV was not detected.

An example of an automatic driving function executed by the driving support ECU 6 is ACC (Adaptive Cruise Control), which controls the traveling speed of the own vehicle so as to maintain the target inter-vehicle distance from the preceding vehicle LV by adjusting the driving force and braking force. Control) function. It also has an AEB (Autonomous Emergency Braking) function that forcibly decelerates the vehicle by generating a braking force based on forward sensing information. In addition, driving assistance ECU6 may be provided with another function as a function of automatic driving.

The navigation device 7 has a map DB storing map data, searches for a route to a set destination that satisfies conditions such as time priority and distance priority, and provides route guidance according to the searched route. The map DB is a non-volatile memory and stores map data such as link data, segment data, node data, and road shape. The map data may include a three-dimensional map including point groups of feature points of road shapes and structures.

The vehicle speed sensor 8 is a sensor that measures the running speed of the vehicle A. As shown in FIG. The vehicle speed sensor 8 detects, for example, the rotational speed of the wheels corresponding to the vehicle speed. The vehicle speed sensor 8 sequentially outputs detection signals to the HCU 20 and the like as traveling speed information.

The HMI system 2 includes an HCU (Human Machine Interface Control Unit) 20, an operation device 21, and a display device 23. The HMI system 2 receives input operations from a passenger who is a user of the own vehicle, and sends information to the passenger of the own vehicle. present information. The operating device 21 is a group of switches operated by the occupants of the vehicle. The operation device 21 is used for making various settings. For example, the operation device 21 may be a steering switch or the like provided on the spoke portion of the steering wheel of the vehicle.

The display device 23 is, for example, a head-up display (hereinafter referred to as HUD) 230 . As shown in FIG. 2, the HUD 230 is provided on the instrument panel 12 of the own vehicle. The HUD 230 forms a display image based on image data output from the HCU 20 by a projector 231 such as a liquid crystal type or a scanning type.

The HUD 230 projects a display image formed by the projector 231 onto a projection area PA defined on the front windshield WS as a projection member through an optical system 232 such as a concave mirror. It is assumed that the projection area PA is positioned in front of the driver's seat. The luminous flux of the display image reflected by the front windshield WS toward the interior of the vehicle is perceived by the passenger sitting in the driver's seat. A passenger sitting in the driver's seat also perceives a luminous flux from the foreground as a landscape existing in front of the vehicle, which is transmitted through the front windshield WS formed of translucent glass. As a result, the occupant can visually recognize the virtual image Vi of the display image displayed in front of the front windshield WS overlapping a part of the foreground. The HUD 230 superimposes a virtual image Vi on the foreground of the vehicle A to achieve so-called AR (Augmented Reality) display. Note that the projection member onto which the HUD 230 projects the display image is not limited to the front windshield WS, and may be a translucent combiner.

The HCU 20 is mainly composed of a processor 20a, a RAM 20b, a memory device 20c, an I/O 20d, and a microcomputer having a bus connecting these, and is connected to the HUD 230 and the in-vehicle LAN. The HCU 20 controls display by the HUD 230 by executing a display control program stored in the memory device 20c. The HCU 20 is an example of a display control device, and the processor 20a is an example of a processing unit. The memory device 20c is a non-transitory tangible storage medium that non-temporarily stores computer-readable programs and data. A non-transitional physical storage medium is implemented by a semiconductor memory, a magnetic disk, or the like.

As shown in FIG. 3, the HCU 20 includes, as functional blocks, a speed acquisition unit 200, a preceding vehicle information acquisition unit 201, a planned route acquisition unit 202, a vehicle position acquisition unit 203, a display object determination unit 205, a display area setting unit 206, and a display generator 207 . A part or all of the functions executed by the HCU 20 may be configured as hardware using one or a plurality of ICs or the like. Also, some or all of the functional blocks of the HCU 20 may be implemented by a combination of software executed by the processor 20a and hardware members.

The speed acquisition unit 200 acquires traveling speed information output from the vehicle speed sensor 8 . The preceding vehicle information acquisition unit 201 acquires the detection information of the preceding vehicle LV output from the driving support ECU 6 . The planned route acquisition unit 202 acquires information on the planned route of the vehicle A to the destination set by the navigation device 7 . The planned route information is information including the planned traveling direction of the vehicle A. FIG. The own vehicle position acquisition unit 203 acquires the vehicle position of the own vehicle which is sequentially positioned by the ADAS locator 3 .

The display object determination unit 205 determines an information display object to be generated based on the acquired scheduled route information and the current position of the vehicle A. FIG. As an example, when the current position of the vehicle A is in a section (for example, an intersection) in which the vehicle A turns left or right or changes lanes, the display object determination unit 205 determines a travel route image Ri, which will be described later, as the information display object. In addition, when the current position of the vehicle A is outside the above-described section, the display object determination unit 205 determines a traveling direction image Di, which will be described later, as an information display object. Hereinafter, the section in which the travel route image Ri is displayed is referred to as a travel route display section, and the section in which the travel direction image Di is displayed is referred to as a travel direction display section.

When the information display image generated by the display object determining unit 205 is determined to be the traveling direction image Di, the display area setting unit 206 sets the display area DA in which the traveling direction image Di is displayed within the projection area PA. do. Here, the display area DA is a range in which the generated traveling direction image Di is accommodated. The display area setting unit 206 sets the display area DA as a virtual area for display control. The display area setting unit 206 changes the area of the display area DA based on the traveling speed information of the vehicle A and the detection information of the preceding vehicle LV. Specifically, the display area setting unit 206 decreases the display area DA from above as the running speed of the vehicle A decreases.

The display generation unit 207 generates image data of the information display image determined by the display object determination unit 205 and outputs the image data to the HUD 230, thereby superimposing and displaying the information display image as a virtual image Vi. In particular, when the traveling direction image Di is determined as an information display object, the display generation unit 207 generates the image data of the traveling direction image Di in a display mode that fits within the display area DA set by the display area setting unit 206. to generate The display generation unit 207 is an example of an image display unit.

Next, an information display image generated by the HCU 20 and an example of setting of the display mode will be described with reference to FIGS. 4 to 6. FIG. The HCU 20 generates the travel direction image Di and the travel route image Ri according to the travel section of the vehicle A.

The traveling direction image Di is an image that notifies the driver of the planned traveling direction of the vehicle A based on the planned route information. Specifically, the traveling direction image Di is an information display object indicating the direction in which the vehicle A should travel in order to travel along the planned route in the next traveling route display section. As an example, when the vehicle A needs to turn right at the next intersection or the like, the traveling direction image Di is generated as an arrow image pointing rightward as shown in FIG. The traveling direction image Di is a superimposed virtual image superimposed on the road surface in front of the vehicle A as a specific superimposition target.

The traveling direction image Di is an information display object displayed in a display mode that fits within the display area DA. The display area DA is set based on the detection information of the preceding vehicle LV and the speed information of the vehicle A. As shown in FIG. 4, when there is no detection information of the preceding vehicle LV, that is, when the preceding vehicle LV is not detected, the display area DA is an area that substantially matches the projection area PA regardless of the traveling speed. set. The area that substantially coincides with the projection area PA is the maximum area of the display area DA.

Therefore, the traveling direction image Di is generated in the projection area PA with the specified maximum size when the preceding vehicle LV is not detected. As an example, the traveling direction image Di is sized so as not to protrude from the projection area PA, and is displayed over the entire vertical range of the projection area PA. In this case, the display mode such as the size and shape of the traveling direction image Di is maintained constant without being changed by the traveling speed of the vehicle A. FIG. Note that the display mode of the traveling direction image Di may be changed based on changes in parameters other than the running speed, such as the inclination of the vehicle A.

On the other hand, as shown in FIG. 5, when the preceding vehicle LV is detected, the display area DA is set to decrease from above as the traveling speed decreases. That is, the vertical position of the area boundary line B on the upper side of the display area DA is set downward as the travel speed decreases. As an example, FIG. 5A shows the display area DA when the traveling speed is 100 km/h, and FIG. 5B shows the display area DA when the traveling speed is 60 km/h.

The upper and lower positions of the area boundary line B are determined by the corresponding relationship with the traveling speed of the vehicle A set in the HCU 20 in advance. Specifically, the vertical position of the area boundary line B is set so as to substantially match the position on the road surface in the foreground corresponding to the preferred inter-vehicle distance from the preceding vehicle LV. Here, the preferred inter-vehicle distance to the preceding vehicle LV is determined by converting a predetermined inter-vehicle time (for example, two seconds) into a distance. Therefore, the lower the traveling speed, the shorter the preferred inter-vehicle distance. As a result, the upper and lower positions of the area boundary line B are set lower as the traveling speed is lower.

Also, the shape of the area boundary line B is set to be an upwardly convex circular arc shape. In other words, the area boundary line B is set so as to be located downward toward the left and right ends. The curvature of the arc of the area boundary line B is such that, for example, the distance from the vehicle A to the position on the road surface corresponding to the area boundary line B is substantially constant regardless of the horizontal position of the area boundary line B. set.

When the preceding vehicle LV is detected, the traveling direction image Di is generated in a display mode that fits within the display area DA set as described above. In particular, the uppermost position of the traveling direction image Di is defined by the area boundary line B and displayed so as to fit within the area boundary line B. FIG. As an example, as shown in FIGS. 5A and 5B, the uppermost position of the traveling direction image Di is adjusted to be the same position as the area boundary line B. FIG. That is, the uppermost position of the traveling direction image Di is set based on the preferred inter-vehicle distance between the vehicle A and the preceding vehicle LV, and is displayed so as to correspond to a position on the road surface separated from the vehicle A by the preferred inter-vehicle distance. controlled. Therefore, the projection position of the traveling direction image Di within the projection area PA is determined by geometric calculation based on the position on the road surface corresponding to the running speed, the position of the driver's viewpoint, and the positional relationship of the projection area PA. Calculated.

As a result, the travel direction image Di is displayed such that the lower the travel speed, the lower the top position. As a result, in the example shown in FIGS. 5A and 5B, the traveling direction image Di is displayed so as to shrink downward as the travel speed decreases. As described above, the travel direction image Di not only presents the planned travel direction, but also presents to the driver the preferred inter-vehicle distance according to the change in the running speed of the vehicle A by its highest position. That is, since the uppermost position of the traveling direction image Di corresponds to a position on the road surface separated from the vehicle A by the preferred inter-vehicle distance from the preceding vehicle LV, the traveling direction image Di and the preceding vehicle LV do not overlap each other. is the running speed for running while maintaining the inter-vehicle distance to the preceding vehicle LV.

Further, even when the preceding vehicle LV is detected, if the running speed is below the threshold, a non-superimposed image D2i is generated as shown in FIG. 5C. The threshold value is a value (eg, 30 km/h) preset in the HCU 20 as a running speed at which the display area DA is narrowed to such an extent that the driver cannot recognize the traveling direction image Di. The non-superimposed image D2i, like the traveling direction image Di, is an image that indicates the planned traveling direction of the vehicle A, and unlike the traveling direction image Di, it is not superimposed on a specific superimposition target and is simply a display object displayed in the foreground. be.

As shown in FIG. 6, the travel route image Ri is a display that notifies the driver of the travel route that the vehicle A should follow in the travel route display section based on the planned route information. The travel route image Ri is displayed regardless of the presence or absence of the preceding vehicle LV. As an example, the travel route image Ri is displayed as a series of sheet-like images extending along the planned travel route of the vehicle A. FIG. The travel route image Ri is superimposed and displayed with the road surface in front of the vehicle A as the superimposition target.

Next, the processing executed by the HCU 20 when performing the information notification described above will be described with reference to the flowchart of FIG. The processing shown in FIG. 7 is started, for example, when the setting of the destination to the navigation device 7 is completed.

First, in step S10, the HCU 20 determines whether or not it is the display scene of the traveling direction image Di. Whether or not it is the display scene of the traveling direction image Di is determined by, for example, whether or not the current traveling section based on the current position of the vehicle A is the traveling direction display section. If it is determined that it is not the display scene of the traveling direction image Di, the process proceeds to step S12, and if generation of a display object according to the current driving scene is necessary, the display object is generated. Specifically, when the current travel section is the travel route display section, the travel route image Ri is generated.

On the other hand, if it is the display scene of the traveling direction image Di, the process proceeds to step S20 to determine whether or not the preceding vehicle LV is present. If it is determined that there is no preceding vehicle LV, the process proceeds to step S22, and it is determined whether or not the non-detection time after the state where the preceding vehicle LV is detected exceeds the threshold time. If it is determined that the preceding vehicle LV undetected time exceeds the threshold time, the process proceeds to step S24 to generate the traveling direction image Di that fits within the projection area PA. After executing the process of step S24, the process returns to step S10 again.

If it is determined in step S20 that there is a preceding vehicle LV, or if it is determined in step S22 that the undetected time of the preceding vehicle LV is less than the threshold time, the process proceeds to step S30. In step S30, the running speed of vehicle A is acquired. In step S40, it is determined whether or not the acquired travel speed is below a threshold.

If it is determined that the running speed is below the threshold, the process proceeds to step S42. In step S42, a non-superimposed image D2i is generated instead of the traveling direction image Di. After executing the process of step S42, the process returns to step S10 again.

On the other hand, if it is determined in step S40 that the traveling speed exceeds the threshold value, the process proceeds to step S50. In step S50, the display area DA is defined according to the running speed. In step S60, the position, shape, and size of the traveling direction image Di are determined so as to fit within the display area DA defined in step S50, and the traveling direction image Di is displayed in the determined manner. After executing the process of step S60, the process returns to step S10.

Next, the configuration and effects of the HCU 20 of the first embodiment will be described.

The HCU 20 includes a speed acquisition unit 200 that acquires the traveling speed of the vehicle A, and a display generation unit 207 that generates a traveling direction image Di for presenting information to the driver. The display generation unit 207 generates the traveling direction image Di in a display mode in which the uppermost position of the traveling direction image Di is lowered as the running speed is lower.

According to this, when the preceding vehicle LV is present in the foreground, the lower the traveling speed of the vehicle A is, the lower the position where the preceding vehicle LV and the traveling direction image Di do not overlap. That is, the lower the running speed of the vehicle A, the shorter the inter-vehicle distance at which the preceding vehicle LV and the traveling direction image Di do not overlap. Therefore, by visually recognizing the positional relationship between the traveling direction image Di and the preceding vehicle LV, the driver can determine the inter-vehicle distance from the preceding vehicle LV according to the traveling speed in addition to the information originally presented by the traveling direction image Di. can grasp. This reduces the need for the driver to visually recognize each of the plurality of display objects. As described above, it is possible to provide the HCU 20 capable of presenting the inter-vehicle distance to the driver according to the traveling speed while suppressing the complicated impression.

The display generation unit 207 displays the traveling direction image Di so that the upper area boundary line B fits within the arc-shaped display area DA that is convex upward. According to this, it is possible to prevent the distance between the position on the road surface in the foreground corresponding to the area boundary line B and the vehicle A from varying depending on the position of the area boundary line B in the left-right direction.

The HCU 20 further has a preceding vehicle information acquisition unit 201 that acquires detection information of the preceding vehicle LV. When the preceding vehicle LV is not detected, the display generation unit 207 stops the display control of the traveling direction image Di based on the running speed. According to this, when the preceding vehicle LV is not detected, the display mode of the traveling direction image Di is not changed due to the change in the running speed. Therefore, the driver can easily recognize the shape of the traveling direction image Di, and easily grasp the information presented by the traveling direction image Di.

The display generation unit 207 continues display control of the traveling direction image Di based on the running speed until the threshold time elapses after the state in which the preceding vehicle LV is detected changes to the state in which it is not detected. According to this, even if the preceding vehicle LV cannot be detected temporarily due to, for example, driving on a curve, display control of the traveling direction image Di based on the traveling speed is not stopped until the threshold time elapses. It is possible to suppress frequent repetition of control continuation and suspension.

The display generation unit 207 superimposes the traveling direction image Di on the road surface in the foreground as a superimposition target. According to this, the inter-vehicle distance corresponding to the traveling speed can be grasped by the displayed object which does not give a relatively uncomfortable feeling even if the display mode is changed according to the traveling speed.

The display generation unit 207 does not superimpose the traveling direction image Di on the road surface when the traveling speed is below the threshold while the preceding vehicle LV is detected. According to this, the display generation unit 207 can prevent the uppermost position of the traveling direction image Di from being positioned excessively downward due to a decrease in traveling speed, thereby avoiding deterioration of the visibility of the traveling direction image Di. In particular, the display generation unit 207 of the first embodiment displays the non-superimposed image D2i, which is simply displayed in the foreground without being superimposed on the road surface, instead of the traveling direction image Di. can be done.

(Other embodiments)
The disclosure herein is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations thereon by those skilled in the art. For example, the disclosure is not limited to the combinations of parts and/or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure encompasses omitting parts and/or elements of the embodiments. The disclosure encompasses permutations or combinations of parts and/or elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. The disclosed technical scope is indicated by the description of the claims, and should be understood to include all changes within the meaning and range of equivalents to the description of the claims. .

In the above-described embodiment, the display generation unit 207 displays the traveling direction image Di so as to shrink downward as the traveling speed decreases. Alternatively, the display generation unit 207 may be configured to simply move downward without changing the shape of the traveling direction image Di.

In the above-described embodiment, the display generation unit 207 does not change the display mode of the traveling direction image Di regardless of the traveling speed when the preceding vehicle LV is not detected. Alternatively, the display generation unit 207 may change the display mode of the traveling direction image Di according to the traveling speed regardless of the presence or absence of the preceding vehicle LV.

In the above-described embodiment, the display generation unit 207 displays the travel direction image Di such that the uppermost position of the traveling direction image Di is positioned downward as the travel speed decreases. Alternatively, the display generation unit 207 may display information display items other than the traveling direction image Di such that the lower the traveling speed, the lower the top position.

The processor 20a in the above embodiment is a processing unit including one or more CPUs (Central Processing Units). Such a processor may be a processing unit including a GPU (Graphics Processing Unit), a DFP (Data Flow Processor), etc., in addition to the CPU. Furthermore, the processor may be a processing unit including an FPGA (Field-Programmable Gate Array) and an IP core specialized for specific processing such as AI learning and inference. Each arithmetic circuit unit of such a processor may be configured to be individually mounted on a printed circuit board, or may be configured to be mounted on an ASIC (Application Specific Integrated Circuit), FPGA, or the like.

The controller and techniques described in this disclosure may be implemented by a special purpose computer comprising a processor programmed to perform one or more functions embodied by a computer program. Alternatively, the apparatus and techniques described in this disclosure may be implemented by dedicated hardware logic circuitry. Alternatively, the apparatus and techniques described in this disclosure may be implemented by one or more special purpose computers configured in combination with a processor executing a computer program and one or more hardware logic circuits. The computer program may also be stored as computer-executable instructions on a computer-readable non-transitional tangible recording medium.

20 HCU (display control unit) 200 speed acquisition unit 201 preceding vehicle information acquisition unit 207 display generation unit 20a processor (processing unit) A vehicle B area boundary line DA display area Di information display image LV Leading vehicle, Vi virtual image.

Claims (8)

A display control device used in a vehicle (A) for controlling the display of a virtual image (Vi) superimposed on the foreground of the driver,
a speed acquisition unit (200) for acquiring the running speed of the vehicle;
As an information display image (Di) that is displayed as a virtual image in the foreground and presents information to the driver, a traveling direction image that notifies the planned traveling direction of the vehicle based on the planned route information is generated. a display generation unit (207) that performs display control such that the uppermost position of the traveling direction image is positioned downward so that the lower the traveling speed, the smaller the traveling direction image is, and the lower the lowermost position;
A display controller comprising: The display control device according to claim 1, wherein the display generation unit sets the uppermost position of the traveling direction image based on a preferable inter-vehicle distance to a preceding vehicle (LV). The display generation unit generates the traveling direction image so that the upper area boundary line (B) fits in an arc-shaped display area (DA) that is convex upward,
3. The display control device according to claim 1, wherein the display area is set in an arc shape with an upper area boundary line (B) protruding upward. Further comprising a preceding vehicle information acquisition unit (201) for acquiring detection information of the preceding vehicle (LV),
3. The display control device according to claim 1, wherein the display generation unit suspends the display control of the traveling direction image when the preceding vehicle is not detected. 5. The display generation unit according to claim 4, wherein the display control of the traveling direction image is continued until a threshold time elapses after the state in which the preceding vehicle is detected changes to the state in which the preceding vehicle is not detected. A display controller as described. The display control device according to any one of claims 1 to 5, wherein the display generation unit generates the traveling direction image as a superimposed virtual image superimposed on a specific superimposition target in the foreground. The display control device according to claim 6, wherein the display generation unit does not superimpose the traveling direction image on the specific superimposition target when the running speed is below a threshold. A display control program for controlling the display of a virtual image (Vi) that is used in a vehicle (A) and superimposed on the foreground of a driver,
at least one processing unit (20a),
a speed acquisition unit (200) for acquiring the running speed of the vehicle;
As an information display image (Di) that is displayed as a virtual image in the foreground and presents information to the driver, a traveling direction image that notifies the planned traveling direction of the vehicle based on the planned route information is generated. Functioning as a display generation unit (207) that performs display control such that the traveling direction image is shrunk from above toward the lowest position, as the traveling speed decreases, by placing the highest position of the traveling direction image downward. A display control program that allows

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