JP2020091148A - Display controller and display control program - Google Patents

Abstract

To provide a display controller, for example, which allows a driver to know the distance to the car in front of the driver according to the rate of travel while suppressing complicated impressions.SOLUTION: An HCU 20 is used in a vehicle and controls display of a virtual display to be overlapped with an overlap target in the foreground of a driver. The HCU 20 includes: a rate acquisition unit 200 for acquiring the travel rate of the vehicle; and a display generation unit 207 for generating an information display image to be presented to the driver, the display generation unit 207 performing a display control to make the upmost position of an information display image lower as the rate of travel is smaller.SELECTED DRAWING: Figure 3

Description

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

Patent Document 1 discloses a vehicle display device. This vehicle display device displays a guidance image for guiding a lane change in the forward field of view of an occupant.

International Publication No. 2015/118859

Generally, the preferable inter-vehicle distance between the host vehicle and the preceding vehicle becomes longer as the traveling speed of the host vehicle becomes higher. When such a preferable vehicle-to-vehicle distance is not secured, it is conceivable to use a vehicle display device as disclosed in Patent Document 1 to issue a vehicle-to-vehicle warning that urges to increase the vehicle-to-vehicle distance. However, the inter-vehicle warning may give a driver a complicated impression.

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

The aspects disclosed in this specification employ different technical means to achieve their respective purposes. Further, the claims and the reference numerals in parentheses in this section are examples showing the correspondence with the concrete means described in the embodiments 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) to be superimposed on a superimposition target in the driver's foreground. 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 are generated, and the lowermost the traveling speed is, the lower the uppermost position of the information display image is. A display generation unit (207) for performing display control.

One of the disclosed display control programs is a display control program that is used in a vehicle (A) and controls the display of a virtual image (Vi) to be superimposed on a superimposition target in the foreground of the driver, and is at least one. The processing unit (20a) generates a speed acquisition unit (200) that acquires the traveling 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. It functions as a display generation unit (207) that performs display control so that the uppermost position of the display image is downward.

According to these disclosures, the uppermost position of the virtual image superimposed and displayed on the foreground is higher as the traveling speed is higher. Therefore, when there is a preceding vehicle in the foreground, the higher the traveling speed of the vehicle, the longer the non-overlapping distance between the preceding vehicle and the information display image. As described above, the information display image can present the preferable inter-vehicle distance according to the traveling speed in addition to the information originally presented, based on the positional relationship with the preceding vehicle. Therefore, it is possible to present the driver with a preferable inter-vehicle distance according to the traveling speed while suppressing a complicated impression.

It is a figure which shows an example of a schematic structure of a vehicle system. It is a figure which shows the example mounted in 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 the information presentation according to the traveling speed of a vehicle. It is a figure which shows an example of information presentation. It is a flow chart which shows an example of the display processing which HCU carries out.

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

As shown in FIG. 1, the ADAS locator 3 includes a GNSS (Global Navigation Satellite System) receiver 30, an inertial sensor 31, and a map database (hereinafter, map DB) 32. The GNSS receiver 30 receives positioning signals from a plurality of artificial satellites. The inertial sensor 31 includes, for example, a gyro sensor and an acceleration sensor. The ADAS locator 3 sequentially measures the vehicle position of the own vehicle by combining the positioning signal received by the GNSS receiver 30 and the measurement result of the inertial sensor 31. In addition, the ADAS locator 3 may use the traveling distance or the like obtained from the detection result sequentially output from the vehicle speed sensor 8 mounted in the vehicle for positioning the vehicle position. The ADAS locator 3 outputs the measured vehicle position to the in-vehicle LAN.

The map DB 32 is a non-volatile memory, and stores link data, node data, map data such as road shapes. The link data is composed of a link ID for identifying the link, a link length indicating the length of the link, a link azimuth, a link travel time, node coordinates of the start and end of the link, road attributes, and the like. The node data is each data such as a node ID given a unique number for each node on the map, a node coordinate, a node name, a node type, a connection link ID in which a link ID of a link connecting to the node is described, an intersection type, etc. Composed of.

Further, as the map data, a configuration may be used in which a three-dimensional map composed of point groups of road shape and feature points of the structure is used. When using this three-dimensional map, the coordinates in the height direction of this point group are expressed as heights. It may be used as information. When the ADAS locator 3 uses this three-dimensional map, the LIDAR (Light Detection and Ranging/Laser) that detects the point cloud of the road shape and the feature points of the structure without using the GNSS receiver 30 is used. The vehicle position of the own vehicle is specified using the detection result of the peripheral monitoring sensor 4 such as Imaging Detection and Ranging). The map data may be acquired from the outside of the vehicle A by using the vehicle-mounted communication module mounted on the vehicle A.

The surroundings monitoring sensor 4 is an autonomous sensor that monitors the surrounding environment of the vehicle. The perimeter monitoring sensor 4 is a moving dynamic target such as a pedestrian, an animal other than a human being, a vehicle other than the own vehicle, a road surface display such as a falling object on the road, a guardrail, a curbstone, a lane marking, or a tree. It detects objects around the vehicle, such as stationary static targets.

For example, as the surroundings monitoring sensor 4, there are surroundings monitoring cameras for imaging a predetermined range around the own vehicle, millimeter wave radars for transmitting exploration waves in a predetermined range around the own vehicle, sonar, LIDAR, and other exploration wave sensors. The perimeter monitoring camera sequentially outputs captured images that are sequentially captured as sensing information to the in-vehicle LAN. The exploration wave sensor sequentially outputs the scanning result based on the received signal obtained when the reflected wave reflected by the object is received, to the in-vehicle LAN as sensing information. The perimeter monitoring sensor 4 of the first embodiment includes at least a front camera 41 whose imaging range is a predetermined range in front of the vehicle. The front camera 41 is provided, for example, on the rearview mirror of the own vehicle, the upper surface of the instrument panel, or the like.

The driving support ECU 6 executes an automatic driving function of performing a driving operation on behalf of an occupant. The driving support ECU 6 recognizes the traveling environment of the own vehicle based on the vehicle position and map data of the own vehicle acquired from the ADAS locator 3, and the sensing information from the surroundings monitoring sensor 4. For example, the driving assistance ECU 6 recognizes the traveling lane markings from the imaged data of the front camera 41, and drives the vehicle in the same lane as the vehicle A among the other vehicles traveling in front of the vehicle A. The preceding vehicle LV is detected. In addition, the driving assistance ECU 6 may detect the preceding vehicle LV based on information from another search wave sensor or the like. When the preceding vehicle LV is detected, the driving assistance ECU 6 sequentially outputs the detection information to the HCU 20. The driving assistance ECU 6 does not output the 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 has not been detected.

An example of the automatic driving function executed by the driving support ECU 6 is an ACC (Adaptive Cruise) that controls the traveling speed of the host vehicle so as to maintain the target inter-vehicle distance from the preceding vehicle LV by adjusting the driving force and the braking force. Control) function. Further, there is an AEB (Autonomous Emergency Braking) function for forcibly decelerating the own vehicle by generating a braking force based on the front sensing information. The driving support ECU 6 may have other functions as a function of automatic driving.

The navigation device 7 includes a map DB that stores map data, searches for a route that satisfies conditions such as time priority and distance priority to a set destination, 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 shapes. The map data may include a three-dimensional map including a road shape and a point group of feature points of the structure.

The vehicle speed sensor 8 is a sensor that measures the traveling speed of the vehicle A. The vehicle speed sensor 8 detects, for example, the rotation speed of the wheel corresponding to the vehicle speed. The vehicle speed sensor 8 sequentially outputs the detection signal as traveling speed information toward the HCU 20 and the like.

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 an input operation from an occupant who is a user of the own vehicle, or is directed to an occupant of the own vehicle. Present information. The operation device 21 is a switch group operated by an occupant of the vehicle. The operation device 21 is used to make various settings. For example, as the operation device 21, there is a steering switch or the like provided on the spoke portion of the steering 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 the image data output from the HCU 20 by using, for example, a liquid crystal type or scanning type projector 231.

The HUD 230 projects the display image formed by the projector 231 onto a projection area PA defined by a front windshield WS as a projection member through an optical system 232 such as a concave mirror. The projection area PA is assumed to be located in front of the driver's seat. The luminous flux of the display image reflected by the front windshield WS toward the vehicle interior is perceived by an occupant sitting in the driver's seat. Further, the light 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, is also perceived by the occupant sitting in the driver's seat. 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 and displays the virtual image Vi on the foreground of the vehicle A to realize so-called AR (Augmented Reality) display. The projection member on 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 configured by a microcomputer including a processor 20a, a RAM 20b, a memory device 20c, an I/O 20d, and a bus connecting these, and is connected to the HUD 230 and the in-vehicle LAN. The HCU 20 controls the display by the HUD 230 by executing the 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. The non-transitional physical storage medium is realized by a semiconductor memory or a magnetic disk.

As shown in FIG. 3, the HCU 20 includes a speed acquisition unit 200, a preceding vehicle information acquisition unit 201, a planned route acquisition unit 202, an own vehicle position acquisition unit 203, a display object determination unit 205, a display area setting unit 206, as functional blocks. And a display generation unit 207. It should be noted that part or all of the functions executed by the HCU 20 may be configured as hardware by one or a plurality of ICs. Further, some or all of the functional blocks included in the HCU 20 may be realized by a combination of software execution by the processor 20a and hardware components.

The speed acquisition unit 200 acquires the 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 assistance ECU 6. The planned route acquisition unit 202 acquires planned route information 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. The vehicle position acquisition unit 203 acquires the vehicle position of the vehicle that is sequentially positioned by the ADAS locator 3.

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

When the information display image generated by the display object determination 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. To do. Here, the display area DA is a range in which the generated traveling direction image Di fits. 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 traveling speed of the vehicle A decreases.

The display generation unit 207 generates the image data of the information display image determined by the display object determination unit 205 and outputs the image data to the HUD 230 to superimpose and display the information display image as the virtual image Vi. In particular, when the traveling direction image Di is determined as the information display object, the display generation unit 207 displays the image data of the traveling direction image Di in a display mode that fits in 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 example of the information display image generated by the HCU 20 and the setting of the display mode thereof will be described with reference to FIGS. 4 to 6. The HCU 20 generates the traveling direction image Di and the traveling route image Ri according to the traveling 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 showing the direction in which the vehicle A should travel in order to travel on the planned route in the traveling route display section that passes next. As an example, when the vehicle A needs to make a right turn at the next intersection or the like, the traveling direction image Di is generated as an arrow image pointing to the right as shown in FIG. The traveling direction image Di is a superimposed virtual image that is superimposed and displayed with the road surface in front of the vehicle A as a specific superimposed 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. Is set. An area that substantially matches 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 defined maximum size when the preceding vehicle LV is not detected. As an example, the traveling direction image Di has a size that does not 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. Note that the display mode of the traveling direction image Di may be changed based on changes in parameters other than the traveling 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 upper side area boundary line B in the display area DA is set lower as the traveling speed is lower. 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 vertical position of the area boundary line B is determined by the correspondence 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 coincide with the position on the road surface in the foreground, which corresponds to the preferable inter-vehicle distance from the preceding vehicle LV. The preferable inter-vehicle distance to the preceding vehicle LV is determined by distance conversion of a predetermined inter-vehicle time (for example, 2 seconds). Therefore, the smaller the traveling speed, the shorter the preferable 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.

Further, the shape of the area boundary line B is set to be an arc shape that is convex upward. That is, the area boundary line B is set to be located lower toward the left and right ends. The curvature of the arc of the area boundary line B is, for example, such that the distance from the vehicle A at the position on the road surface corresponding to the area boundary line B is substantially constant regardless of the position of the area boundary line B in the left-right direction. Is set.

When the preceding vehicle LV is detected, the traveling direction image Di is generated in a display mode that fits in 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 is displayed so as to fit within the area boundary line B. 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 region boundary line B. That is, the uppermost position of the traveling direction image Di is set based on the preferable vehicle-to-vehicle distance between the vehicle A and the preceding vehicle LV, and is displayed so as to correspond to the position on the road surface separated from the vehicle A by the preferable vehicle-to-vehicle distance. Controlled. Therefore, the projection position of the traveling direction image Di in the projection area PA is calculated geometrically based on the position on the road surface corresponding to the traveling speed, the viewpoint position of the driver, the positional relationship of the projection area PA, and the like. Is calculated.

As a result, the traveling direction image Di is displayed such that the uppermost position is downward as the traveling speed is lower. 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 traveling speed decreases. As described above, the traveling direction image Di presents the preferred inter-vehicle distance according to the change in the traveling speed of the vehicle A to the driver at the highest position, in addition to the presentation of the planned traveling direction. That is, since the uppermost position of the traveling direction image Di corresponds to the position on the road surface that is separated from the vehicle A by the preferable inter-vehicle distance from the preceding vehicle LV, the traveling speed at which the traveling direction image Di and the preceding vehicle LV do not overlap each other. Is the traveling speed for traveling while maintaining the inter-vehicle distance from the preceding vehicle LV.

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

As shown in FIG. 6, the traveling route image Ri is a display object that notifies the driver of the traveling route that the vehicle A should follow in the traveling 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 traveling route image Ri is displayed as a series of sheet-shaped images extending along the planned traveling route of the vehicle A. The travel route image Ri is superimposed and displayed on the road surface in front of the vehicle A as a superimposition target.

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

First, in step S10, the HCU 20 determines whether or not it is a display scene of the traveling direction image Di. Whether or not it is a 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 it is necessary to generate the display object according to the current traveling scene, the display object is generated. Specifically, when the current travel section is the travel path display section, the travel path image Ri is generated.

On the other hand, when it is the display scene of the traveling direction image Di, the process proceeds to step S20, and it is determined whether or not the preceding vehicle LV exists. 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 undetected time after the preceding vehicle LV is detected is changed to the undetected state exceeds the threshold time. When it is determined that the undetected time of the preceding vehicle LV exceeds the threshold time, the process proceeds to step S24, and the traveling direction image Di that fits in the projection area PA is generated. When the process of step S24 is executed, the process returns to step S10 again.

If it is determined in step S20 that the preceding vehicle LV is present, or if it is determined in step S22 that the undetected time of the preceding vehicle LV is shorter than the threshold time, the process proceeds to step S30. In step S30, the traveling speed of the vehicle A is acquired. In step S40, it is determined whether the acquired traveling speed is below the threshold value.

When it is determined that the traveling speed is lower than the threshold value, the process proceeds to step S42. In step S42, a non-superimposed image D2i is generated instead of the traveling direction image Di. When the process of step S42 is executed, 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 traveling 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 mode. When the process of step S60 is executed, the process returns to step S10 again.

Next, the configuration and operational 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 that presents 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 lower as the traveling speed is lower.

According to this, when the preceding vehicle LV exists in the foreground, the lower the traveling speed of the vehicle A, the lower the position where the preceding vehicle LV and the traveling direction image Di do not overlap. That is, the smaller the traveling speed of the vehicle A, the shorter the inter-vehicle distance between the preceding vehicle LV and the traveling direction image Di does not overlap. Therefore, the driver visually recognizes the positional relationship between the traveling direction image Di and the preceding vehicle LV, and thereby, in addition to the information originally presented in the traveling direction image Di, the distance between the preceding vehicle LV and the preceding vehicle LV corresponding to the traveling speed. You can figure it out. Therefore, it is possible to reduce 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 according to the traveling speed to the driver 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 in the arc-shaped display area DA that is convex upward. According to this, it is possible to prevent the distance between the vehicle A and the position on the road surface in the foreground corresponding to the area boundary line B from being different depending on the left-right position of the area boundary line B.

The HCU 20 further includes a preceding vehicle information acquisition unit 201 that acquires the 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 traveling speed. According to this, when the preceding vehicle LV is not detected, the display mode of the traveling direction image Di is not changed by the change of the traveling 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 the display control of the traveling direction image Di based on the traveling speed until the state in which the preceding vehicle LV is detected changes to the state in which the preceding vehicle LV is not detected and the threshold time elapses. According to this, even if the preceding vehicle LV cannot be detected temporarily, for example, when traveling on a curve, the 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 prevent frequent continuation and suspension of control.

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, it is possible to grasp the inter-vehicle distance according to the traveling speed by the display object that is relatively comfortable 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 lower than the threshold value while the preceding vehicle LV is detected. According to this, the display generation unit 207 can prevent the top position of the traveling direction image Di from being excessively downward due to the decrease in the traveling speed, and thus reducing the visibility of the traveling direction image Di. Particularly, since the display generation unit 207 of the first embodiment displays the non-superimposed image D2i which is not superimposed on the road surface and is simply displayed in the foreground, instead of the traveling direction image Di, the presentation of the information about the planned traveling direction should be continued. You can

(Other embodiments)
The disclosure herein is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations on them based on them. For example, the disclosure is not limited to the combination of parts and/or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure may have additional parts that may be added to the embodiments. The disclosure includes omissions of parts and/or elements of the embodiments. The disclosure includes replacements 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. It is to be understood that some technical scopes disclosed are shown by the description of the claims, and further include meanings equivalent to the description of the claims and all modifications within the scope. .

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. Instead of this, 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. Instead of this, 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 traveling direction image Di so that the uppermost position of the traveling direction image Di is lower as the traveling speed is lower. Instead of this, the display generation unit 207 may display the information display object other than the traveling direction image Di such that the lower the traveling speed, the lower the top position is.

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

The control unit and the method described in the present disclosure may be realized by a dedicated computer that configures a processor programmed to execute one or a plurality of functions embodied by a computer program. Alternatively, the apparatus and method described in the present disclosure may be realized by a dedicated hardware logic circuit. Alternatively, the apparatus and method described in the present disclosure may be realized by one or more dedicated computers configured by a combination of a processor that executes a computer program and one or more hardware logic circuits. Further, the computer program may be stored in a computer-readable non-transition tangible recording medium as an instruction executed by a computer.

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 display of a virtual image (Vi) superimposed on a foreground of a driver, comprising:
A speed acquisition unit (200) for acquiring the traveling speed of the vehicle,
A display generation unit that generates an information display image (Di) that is displayed as the virtual image in the foreground and presents information to the driver, and performs display control that lowers the uppermost position of the information display image as the traveling speed decreases. (207),
And a display control device. The display control device according to claim 1, wherein the display generation unit sets the uppermost position based on a preferable inter-vehicle distance from a preceding vehicle (LV). The display generation unit generates the information display image so that the upper area boundary line (B) fits within an arc-shaped display area (DA) that is convex upward.
The display control device according to claim 1, wherein the display area is set in an arc shape in which an upper area boundary line (B) is convex upward. A preceding vehicle information acquisition unit (201) for acquiring detection information of the preceding vehicle (LV) is further provided,
The display control device according to claim 1, wherein the display generation unit suspends the display control when the preceding vehicle is not detected. The display control device according to claim 4, wherein the display generation unit continues the display control until a threshold time elapses after the state in which the preceding vehicle is detected is changed to the state in which the preceding vehicle is not detected. .. The display control device according to claim 1, wherein the display generation unit generates the information display image as a superimposed virtual image to be 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 information display image on the specific superimposition target when the traveling speed is below a threshold value. A display control program used in a vehicle (A) for controlling display of a virtual image (Vi) superimposed on a driver's foreground,
At least one processing unit (20a),
A speed acquisition unit (200) for acquiring the traveling speed of the vehicle,
A display generation unit that generates an information display image (Di) that is displayed as the virtual image in the foreground and presents information to the driver, and performs display control that lowers the uppermost position of the information display image as the traveling speed decreases. (207), a display control program to function as.

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