JP2022066149A - Virtual image display device and display system - Google Patents

Abstract

To provide a virtual image display device and the like that can improve convenience.SOLUTION: A HUD 100 is a virtual image display device for displaying a virtual image Vi that is visible by a driver of a vehicle A. The HUD 100 uses an actuator to switch a position of a view angle VA at which the virtual image Vi is displayed, between a plurality of positions including a normal position VP1 and an overlapping position VP2. The HUD 100 displays a virtual image Vi that is associated with the normal position VP1 and the overlapping position VP2 respectively, according to the switching of positions of the view angle VA using the actuator. Then, when displaying a specific content CTis within a view angle of the overlapping position VP2, after the view angle VA has been moved from the normal position VP1 to the overlapping position VP2, the HUD 100 starts displaying an associated content CTr associated in advance with the specific content CTis, before completion of the movement of the view angle VA to the overlapping position VP2.SELECTED DRAWING: Figure 4

Description

The disclosure according to this specification relates to a virtual image display device and a display system for displaying a virtual image visible to the occupants of the vehicle.

Patent Document 1 discloses a head-up display device including an adjustment mechanism for mechanically moving a projection range in which light of a display image displayed as a virtual image is projected. As a scene adaptation control, this head-up display device moves the position of the projection range by an adjustment mechanism so that the entire high-priority display object is displayed.

Japanese Unexamined Patent Publication No. 2019-189139

In a configuration including a mechanism for moving the position of the angle of view on which the virtual image is displayed as in Patent Document 1, it takes time to mechanically move the position of the angle of view. Therefore, when the process of displaying a specific content within the moved angle of view is performed after the movement of the angle of view is completed, there is a time lag until the display starts due to the movement of the angle of view. When such a time lag is perceived by the occupants of the vehicle, even if the angle of view capable of displaying the virtual image can be expanded, the occupants tend to feel a sense of discomfort. As a result, the convenience of the virtual image display device may be impaired.

It is an object of the present disclosure to provide a virtual image display device and a display system capable of improving convenience.

In order to achieve the above object, one aspect disclosed is a virtual image display device that displays a virtual image (Vi) visible to the occupant of the vehicle (A), and has an angle of view (VA) on which the virtual image is displayed. A switching mechanism (63,263,264) that switches the position between a plurality of positions including the first position (VP1) and the second position (VP2), and the first position according to the switching of the angle of view position by the switching mechanism. A display control unit (73) for displaying a virtual image associated with each of the position and the second position is provided, and the display control unit is provided after the switching mechanism moves the angle of view from the first position to the second position. When displaying the specific content (Ctis) within the angle of view of the second position, the display of the related content (CTr) previously associated with the specific content is displayed before the movement of the angle of view to the second position is completed. It is a virtual image display device to be started.

In this embodiment, the related content previously associated with the specific content is displayed before the movement of the angle of view from the first position to the second position is completed, so that the display is started due to the movement of the angle of view by the switching mechanism. The time lag is less likely to be perceived by the occupants of the vehicle. Therefore, even if the switching mechanism is provided to expand the angle of view that can display a virtual image, the discomfort of the display can be reduced. As a result, it becomes possible to enhance the convenience of the virtual image display device.

The reference numbers in parentheses in the above and claims merely indicate an example of the correspondence with the specific configuration in the embodiment described later, and do not limit the technical scope at all.

It is a figure for demonstrating the virtual image display function of the HUD by the 1st Embodiment of this disclosure. It is a block diagram which shows the electrical structure of a display system. It is a figure which shows an example of a look-up table. It is a figure which shows the detail of the transition of the display when moving the angle of view position. It is a figure which shows an example of the display in a normal position at the time of performing a lane deviation warning. It is a figure which shows an example of the display in the angle-of-view movement period from a normal position to a superimposition position at the time of performing a lane deviation warning. It is a figure which shows an example of the display at the superimposition position when the lane deviation warning is carried out. It is a figure which shows another example of the display in the angle-of-view movement period when the lane deviation warning is carried out. It is a figure which shows another example of the display at the superimposition position when the lane deviation warning is carried out. It is a figure which shows another example of the display in the angle-of-view movement period when the lane deviation warning is carried out. It is a figure which shows an example of the display in a normal position at the time of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows an example of the display in the angle of view movement period from a normal position to a superimposition position at the time of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows an example of the display at the superimposition position at the time of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows another example of the display in the angle of view movement period in the case of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows another example of the display at the superimposition position at the time of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows another example of the display in the angle of view movement period in the case of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows another example of the display at the superimposition position at the time of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows another example of the display in the angle of view movement period in the case of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows another example of the display at the superimposition position at the time of notifying the status change of the inter-vehicle distance maintenance control. It is a figure which shows an example of the display in a normal position of the turn-by-turn which performs a route guidance. It is a figure which shows an example of the display in the angle of view movement period from a normal position to a superimposition position in turn-by-turn. It is a figure which shows an example of the display at the superposition position of turn-by-turn. It is a figure which shows another example of the display at the superposition position of turn-by-turn. It is a figure which shows another example of the display at the superposition position of turn-by-turn. It is a figure which shows another example of the display at the superposition position of turn-by-turn. It is a figure which shows an example of the sign recognition support display when the angle of view is a normal position. It is a figure which shows an example of the sign recognition support display after the angle of view moves to a superimposition position. It is a figure which shows an example of the sign recognition support display after the angle of view returns to a normal position. It is a figure which shows another example of the sign recognition support display after the angle of view moves to a superimposition position. It is a figure which shows another example of the sign recognition support display after the angle of view moves to a superimposition position. It is a figure which shows another example of the sign recognition support display after the angle of view moves to a superimposition position. It is a flowchart which shows the detail of the display control processing performed by a head-up ECU. It is a flowchart which shows the detail of the display control processing performed by a meter ECU. It is a block diagram which shows the electric structure of the display system by 2nd Embodiment. It is a figure which shows an example of the angle-of-view position specified in the HUD by 2nd Embodiment, and the content displayed at each angle-of-view position. It is a block diagram which shows the electric structure of the display system by 2nd Embodiment. It is a figure which shows an example of the display in the angle-of-view movement period from a normal position to a superimposition position when a forward target warning is carried out. It is a figure which shows an example of the display at the superimposition position when the forward target warning is carried out. It is a figure which shows an example of the display in a normal position at the time of carrying out the parking space guidance. It is a figure which shows an example of the display in the angle of view movement period from a normal position to a superimposition position in the case of carrying out parking space guidance. It is a figure which shows an example of the display at the superimposition position when the parking space guidance is carried out. It is a figure which shows an example of the display in the angle of view movement period from the superimposition position to a normal position in the case of carrying out parking space guidance. It is a figure which shows an example of the display in a normal position when carrying out a narrow road driving support display. It is a figure which shows an example of the display in the angle-of-view movement period from a normal position to a superimposition position when performing a narrow road running support display. It is a figure which shows an example of the display at the superimposition position when the narrow road running support display is carried out. It is a figure which shows an example of the narrow road running support display after returning the position of an angle of view to a normal position. It is a figure which shows an example of the display in a normal position when the field of view support display is carried out. It is a figure which shows an example of the display in the period of moving the angle of view from a normal position to a superimposition position when the field of view support display is carried out. It is a figure which shows an example of the display at the superimposition position in the case of carrying out the visual field support display. It is a figure which shows an example of the display in the period of moving the angle of view from the superimposition position to the normal position in the case of performing the field of view support display.

Hereinafter, a plurality of embodiments of the present disclosure will be described with reference to the drawings. By assigning the same reference numerals to the corresponding components in each embodiment, duplicate description may be omitted. When only a part of the configuration is described in each embodiment, the configuration of the other embodiment described above can be applied to the other parts of the configuration. Further, not only the combination of the configurations specified in the description of each embodiment but also the configurations of a plurality of embodiments can be partially combined even if the combination is not specified. Further, an unspecified combination of the configurations described in the plurality of embodiments and modifications is also disclosed by the following description.

(First Embodiment)
The function of the virtual image display device according to the first embodiment of the present disclosure is implemented in the head-up display (hereinafter, HUD) 100 shown in FIGS. 1 and 2. The HUD 100 constitutes a display system 110 together with a meter display device 30 and the like. The display system 110 is used in the vehicle A, and presents various information related to the vehicle A to the driver in cooperation with the virtual image display by the HUD 100 and the screen display by the meter display device 30.

The HUD 100 and the meter display device 30 are communicably connected to the communication bus of the vehicle-mounted network mounted on the vehicle A. Other in-vehicle ECUs such as a camera ECU (Electronic Control Unit) 21, a navigation ECU 22, and a driving support ECU 23 are further connected to the communication bus of the in-vehicle network. These configurations connected as nodes to the communication bus are communicable with each other. Specific nodes among these ECUs and the like may be directly electrically connected to each other and may be able to communicate with each other without going through the communication bus 99.

The camera ECU 21 is a processing device having a processor, RAM, storage, and the like, and is electrically connected to one or more in-vehicle cameras mounted on the vehicle A. Video data around the vehicle captured by the vehicle-mounted camera is input to the camera ECU 21. The camera ECU 21 analyzes the image of the in-vehicle camera (hereinafter referred to as the front camera) that captures the front of the vehicle A, the distance to the preceding vehicle Af (see FIG. 10), the lane markings Lml, Lmr (FIG. 7) on the left and right of the vehicle. The relative position of the vehicle (see), the road sign RS in front of the vehicle (see FIG. 26), and the like are detected. The camera ECU 21 provides the driving support ECU 23 with detection information such as the preceding vehicle Af and the lane markings Lml and Lmr. The camera ECU 21 provides the HUD 100 and the meter display device 30 with the recognition information of the road sign RS recognized by the sign recognition (Traffic Sign Recognition) function.

The navigation ECU 22 is a processing device having a processor, RAM, storage, and the like, and implements route guidance to a destination set by an occupant. When the navigation ECU 22 approaches a guidance area for guiding straight ahead, turning left or right, branching, merging, etc. during route guidance, route information about the guidance area is provided to the HUD 100 and the meter display device 30.

The driving support ECU 23 is a processing device having a processor, RAM, storage, and the like, and realizes a plurality of support functions for supporting the driving of the driver of the vehicle A. As an example, the driving support ECU 23 has driving support functions such as LDW (Lane Departure Warning) and ACC (Adaptive Cruise Control).

The driving support ECU 23 determines the deviation of the own vehicle from the own lane that protrudes from the lane markings Lml and Lmr based on the detection information of the lane markings Lml and Lmr acquired from the camera ECU 21 by the LDW function. When the driving support ECU 23 determines the deviation of the own vehicle from the own lane, the driving support ECU 23 provides the lane deviation information to the HUD 100 and the meter display device 30, and warns the driver of the deviation from the lane.

The driving support ECU 23 uses the ACC function to drive the vehicle A at a constant speed at the target vehicle speed, or based on the detection information of the preceding vehicle Af acquired from the camera ECU 21, the driving support ECU 23 maintains the inter-vehicle distance from the preceding vehicle Af. The vehicle A is made to follow the preceding vehicle Af. When the ACC function is operating, the operation support ECU 23 provides the HUD 100 and the meter display device 30 with status information indicating the control state of the ACC function.

Next, the details of the configuration of the meter display device 30 and the HUD100 will be described in order.

The meter display device 30 is one of a plurality of display devices mounted on the vehicle A, and presents information to the driver by displaying an image on the display screen. The meter display device 30 has a configuration corresponding to a combination meter, and is housed in the instrument panel 9 with the display screen facing the driver's seat. As an example, the meter display device 30 is installed in the vehicle interior of the vehicle A at a front position that is easily visible to the driver seated in the driver's seat. The meter display device 30 includes a meter display 31 and a meter ECU 32.

The meter display 31 is, for example, a liquid crystal display, an organic EL display, or the like. The meter display 31 displays a speedometer image, a tachometer image, a navigation map image, a driving support image, and the like on the display screen based on the video data acquired from the meter ECU 32.

The meter ECU 32 is an electronic control device that functions as an HCU (Human Machine Interface Control Unit) in the display system 110 and controls the user interface function of the vehicle A. The meter ECU 32 integrally controls the display by display devices such as the meter display 31, HUD100 and the center display. The meter ECU 32 generates video data to be provided to the meter display 31 based on various information output to the communication bus.

The meter ECU 32 mainly includes a computer including a processing unit, RAM, storage, an input / output interface, and a bus connecting them. The meter ECU 32 cooperates with the head-up ECU 70 described later to execute arithmetic processing for displaying a virtual image. The meter ECU 32 generates image data used for displaying the virtual image Vi, and sequentially outputs the generated image data to the HUD100. The meter ECU 32 generates image data used for displaying virtual images such as lane deviation warning, ACC status, turn-by-turn, and sign recognition, which will be described later, and provides the HUD 100 with image data.

The HUD 100 is one of a plurality of display devices mounted on the vehicle A, and presents information to the driver by a virtual image Vi formed in the space in front of the driver. The HUD 100 is housed in a storage space provided inside the instrument panel 9. The HUD100 projects light imaged as a virtual image Vi (hereinafter referred to as virtual image light Lvi) toward the projection range PA of the windshield WS. The virtual image light Lvi projected on the windshield WS is reflected toward the driver's seat side in the projection range PA and is perceived by the driver. The driver visually recognizes the display in which the virtual image Vi is superimposed on the foreground seen through the projection range PA.

The HUD 100 includes a PGU (Picture Generation Unit) 61, a magnifying optical system 62, an actuator 63, and a head-up ECU 70.

The PGU 61 has an LCD (Liquid Crystal Display) panel and a backlight. The PGU 61 is fixed to the housing of the HUD 100 with the display surface of the LCD panel facing the magnifying optical system 62. The PGU 61 displays each frame image of the video data on the display surface of the LCD panel, and transmits and illuminates the display surface with a backlight to direct the virtual image light Lvi imaged as a virtual image Vi toward the magnifying optical system 62. Eject.

The magnifying optical system 62 includes at least one concave mirror in which a metal such as aluminum is vapor-deposited on the surface of a base material made of synthetic resin or glass. The magnifying optical system 62 projects the light emitted from the PGU 61 onto the upper projection range PA while spreading it by reflection.

The actuator 63 is a mechanism for mechanically moving a region of the windshield WS that is a projection range PA. The projection range PA is a range in which the virtual image light Lvi is projected, and is a range in which the virtual image Vi is visually displayed from the driver. The actuator 63 rotates the concave mirror around the rotation axis defined by the concave mirror of the magnifying optical system 62, and changes the emission direction of the virtual image light Lvi from the magnifying optical system 62 toward the windshield WS. The actuator 63 moves the position of the projection range PA of the virtual image light Lvi and the angle of view VA visually recognized by the driver at least in the vertical direction US (see FIG. 1) by changing the posture of the concave mirror.

More specifically, when the virtual range in the space where the virtual image Vi can be imaged is defined as the image plane IS, the angle of view VA is a virtual line connecting the driver's eye point EP and the outer edge of the image plane IS. It is a viewing angle defined based on. The angle of view VA is an angle range in which the driver can visually recognize the virtual image Vi when viewed from the eye point EP. In the HUD100, the horizontal angle of view (for example, about 6 °) in the horizontal direction is larger than the vertical angle of view (for example, about 2 °) in the vertical direction. When the angle of view VA moves in the vertical direction US, the front range within the angle of view VA changes. As an example, when the actuator 63 positions the angle of view VA at the lowermost position (for example, the depression angle is about 3 °), the front range of 10 to 20 m is the range within the angle of view VA. On the other hand, when the actuator 63 positions the angle of view VA at the uppermost position (for example, the depression angle is about 1 °), the front range of about 30 m to 80 m is the range within the angle of view VA.

Here, the front-rear direction ZG and the left-right direction Yo are defined with reference to the vehicle A stationary on a horizontal plane. Specifically, the front-rear direction ZG is defined along the longitudinal direction (traveling direction) of the vehicle A. Further, the left-right direction Yo is defined along the width direction of the vehicle A. Further, the vertical direction US is defined along the vertical direction of the horizontal plane defining the front-back direction ZG and the left-right direction Yo. For the sake of simplification, the description of the reference numerals indicating each direction will be omitted as appropriate.

The head-up ECU 70 is a control circuit of the HUD 100 that integrally controls the PGU 61 and the actuator 63. The head-up ECU 70 has a configuration mainly including a computer including a processing unit, RAM, storage, an input / output interface, and a bus connecting them. The head-up ECU 70 is further provided with a drive circuit for driving the LCD panel, the backlight, and the actuator 63.

The head-up ECU 70 changes the content to be displayed as a virtual image Vi in association with the position of the angle of view VA. Specifically, the head-up ECU 70 switches the position of the angle of view VA on which the virtual image Vi is displayed between a plurality of positions including the normal position VP1 and the superposed position VP2 by the drive control of the actuator 63. The head-up ECU 70 displays a virtual image Vi associated with each of the normal position VP1 and the superimposed position VP2 according to the switching of the position of the angle of view VA by the actuator 63.

The normal position VP1 is an angle of view position that mainly displays the non-superimposed content CTn as a virtual image Vi. The normal position VP1 is a reference position of the angle of view VA, and corresponds to a constant position having a longer period of use than the superimposed position VP2. The non-superimposed content CTn is a display object (non-AR display object) excluding the superimposed content CTs, which will be described later, among the display objects superimposed and displayed in the foreground. Unlike the superimposed content CTs, the non-superimposed content CTn is displayed at a specific position within the projection range PA (angle of view VA) without specifying the superimposed target. Therefore, the non-superimposed content CTn is visually recognized by the driver as if it is relatively fixed to the vehicle configuration such as the windshield WS. The state in which the vehicle information such as the vehicle speed is displayed on the normal position VP1 by the non-superimposed content CTn is the reference state for the virtual image display by the HUD100 (see the upper part of FIG. 5 and the like).

The superimposed position VP2 is an angle of view position that mainly displays the superimposed content CTs as a virtual image Vi. The superimposed position VP2 is defined above the normal position VP1. Superimposed content CTs are AR display objects used for augmented reality (AR) display. The display position of the superimposed content CTs is associated with a specific superimposed object existing in the foreground, such as a specific position on the road surface, a vehicle in front, a pedestrian, and a road sign. The superimposed content CTs are superimposed and displayed on a specific superimposed object in the angle of view VA, and can be moved on the appearance of the driver following the superimposed object so as to be relatively fixed to the superimposed object. The shape of the superimposed content CTs is continuously updated at a predetermined cycle according to the relative position and shape of the superimposed object. The superimposed content CTs are displayed in a posture closer to horizontal than the non-superimposed content CTn, and have a display shape extended in the depth direction as seen from the driver, for example. As an example, when a specific event to be notified to the driver occurs, the HUD 100 moves the angle of view VA from the normal position VP1 to the superimposed position VP2 and displays the superimposed content CTs.

As described above, in order to realize the virtual image display control in which the angle of view position and the content are linked, the head-up ECU 70 executes a program (virtual image display program) stored in the storage by the processing unit, and performs a plurality of functional units. Be prepared. Specifically, the head-up ECU 70 includes functional units such as an information acquisition unit 71, a data storage unit 72, and a display control unit 73.

The information acquisition unit 71 is connected to the communication bus and the meter ECU 32. The information acquisition unit 71 acquires the recognition information of the road sign RS by the camera ECU 21, the route information by the navigation ECU 22, the lane deviation information and the status information by the driving support ECU 23, and the like from the communication bus. Image data for displaying a virtual image generated by the meter ECU 32 is sequentially input to the information acquisition unit 71. The information acquisition unit 71 is electrically connected to the AR switch 68. The AR switch 68 is a switch for switching ON / OFF of AR display using superimposed content CTs. The information acquisition unit 71 detects the on and off states of the AR switch 68.

The data storage unit 72 is a storage area that stores a plurality of data referred to by the display control unit 73. The data storage unit 72 may be a storage area reserved in the RAM, or may be a partial storage area in the storage. In the data storage unit 72, the look-up table 81, the mirror position data 82, 83, and the graphic data 84, 85 are prepared for reference by the display control unit 73.

The look-up table 81 (see FIG. 2 Look-up Table) is information for associating the angle of view position with the content (see FIG. 3). The mirror position data 82 (see FIG. 2 Mirror Position Data A) is information that defines the angle position of the concave mirror when the angle of view VA is set to the normal position VP1. The mirror position data 83 (see FIG. 2 Mirror Position Data B) is information that defines the angle position of the concave mirror when the angle of view VA is set to the superimposed position VP2. The mirror position data 82 and 83 may be values that can be adjusted by the driver so as to match the position of the eye point EP of the driver. The graphic data 84 (see Graphic Data A in FIG. 2) is image data (material data) used when the angle of view VA is at the normal position VP1. The graphic data 85 (see Graphic Data B in FIG. 2) is image data (material data) used when the angle of view VA is at the superimposed position VP2.

The display control unit 73 is a control unit that integrally controls the PGU 61 and the actuator 63, and generates video data and a control signal to be output to the PGU 61 and a drive signal to be output to the actuator 63. The display control unit 73 switches between valid and invalid of the operation of moving the angle of view VA to the superimposed position VP2 based on the ON / OFF state of the AR switch 68 grasped by the information acquisition unit 71. When the AR switch 68 is in the off state, the display control unit 73 fixes the angle of view VA to the normal position VP1 and interrupts the display of the superimposed content CTs.

The display control unit 73 determines the position of the angle of view VA based on the information acquired by the information acquisition unit 71 and the contents of the look-up table 81, and the content to display a virtual image based on the determined angle of view position. Select. The display control unit 73 extracts the material data of the image used for generating the video data from the graphic data 84 and 85 based on the selection result of the content. The display control unit 73 appropriately combines the image data generated from the graphic data 84 and 85 with the image data provided by the meter ECU 32 to generate each frame image of the video data. The display control unit 73 sequentially outputs video data consisting of a large number of continuous frame images to the PGU 61.

When moving the position of the angle of view VA, the display control unit 73 requires time (for example, about 1 second) to mechanically rotate the concave mirror by the actuator 63. Therefore, when the virtual image Vi (specific content Ctis) is displayed in the moved angle of view VA after the movement of the angle of view VA from one of the normal position VP1 and the superimposed position VP2 to the other is completed, the angle of view VA is changed. There is a time lag until the display starts due to the movement. In order to prevent such a time lag from causing discomfort to the driver, the display control unit 73 starts the display of the related content CTr associated with the specific content Ctis before the movement of the angle of view VA is completed.

Specifically, as shown in FIGS. 4 and 2, the display control unit 73 displays the related content CTr when the angle of view VA is moved from the normal position VP1 to the superimposed position VP2. The related content CTr is displayed in a manner related to the specific content Ctis displayed in the angle of view VA of the superimposed position VP2 after the actuator 63 moves the angle of view VA from the normal position VP1 to the superimposed position VP2. Related means, for example, that the related content CTr attracts the specific content CTr, that the related content CTr is assimilated with the specific content Ctis, that a part of the specific content Ctis is displayed as the related content CTr, and the like. Means. Further, as another example, the specific content Ctis and the related content CTr may be associated on the display by making the display colors similar or the same to the extent that the driver recognizes them as the same. Further, even when the related content CTr contains the same information as the specific content Ctis, the related content CTr becomes a mode related to the specific content Ctis.

The related content CTr includes the first related content CTr1 and the second related content CTr2. The first related content CTr1 is started to be displayed before the time t1 at which the actuator 63 starts the movement of the angle of view VA from the normal position VP1. The display of the first related content CTr1 is terminated at time t1. The first related content CTr1 is displayed as the background of the non-superimposed content CTn displayed at the normal position VP1, for example, and blinks a plurality of times until the display is finished at the time t1.

The second related content CTr2 is displayed during the moving period (hereinafter referred to as the moving period TM1) in which the angle of view VA is moved by the actuator 63. The second related content CTr2 starts displaying after the time t1 when the display of the first related content CTr1 ends, and ends the display before the time t2 when the movement of the angle of view VA is completed. The second related content CTr2 is a content having a different mode from the first related content CTr1. For example, the first related content CTr1 is a non-superimposed content CTn, while the second related content CTr2 is either a superposed content CTs or a non-superimposed content CTn. The display control unit 73 causes a tone-up display change that continuously or gradually increases the brightness of the second related content CTr2 as the angle of view position approaches the superimposed position VP2. As a result, the second related content CTr2 becomes a highly attractive display object as the angle of view VA moves.

On the other hand, when the angle of view VA is moved from the superimposed position VP2 to the normal position VP1, the display control unit 73 does not display the related content CTr. The display control unit 73 ends the superimposed display of the specific content Ctis before the time t3 when the actuator 63 starts moving the angle of view VA from the superimposed position VP2 to the normal position VP1. The display control unit 73 temporarily interrupts all virtual image display during the moving period in which the angle of view VA is moved by the actuator 63 (hereinafter referred to as the moving period TM2). The display control unit 73 restarts the display of the non-superimposed content CTn at the time t4 when the angle of view position reaches the normal position VP1 or when a predetermined time (for example, about 1 second) has elapsed from the time t4. When displaying a part of the specific content Ctis, the related content CTr displayed in the movement period TM1 may also be displayed in the movement period TM2.

The meter ECU 32 changes the display of the display screen of the meter display 31 in cooperation with the switching of the position of the angle of view VA by the actuator 63 in the HUD100. The meter ECU 32 displays detailed information PDi related to the specific content Ctis on the display screen. The detailed information PDi is the same type of information as the specific content Ctis, and presents the driver with more detailed content than the specific content Ctis.

When there is a movement of the angle of view VA from the normal position VP1 to the superimposed position VP2, the meter ECU 32 continuously or stepwise changes the image brightness of the detailed information PDi displayed on the screen during the movement period TM1 from the time t1 to the time t2. Causes a change in the tone-down display. As a result, as the movement of the angle of view VA elapses, the detailed information PDi becomes a display object with low attractiveness. As a result, the display changes such that the brightness is handed over from the screen display of the meter display device 30 to the virtual image display by the HUD 100, and the driver's line of sight is guided to the foreground.

The meter ECU 32 hides the detailed information PDi at the time t2 when the movement of the angle of view VA to the superimposed position VP2 is completed. The meter ECU 32 keeps the detailed information PDi hidden during the period when the angle of view VA is at the superimposed position VP2 and the display of the specific content Ctis is continued. As a result, the situation in which the detailed information PDi attracts the driver and obstructs the visibility of the outside world does not occur. The screen display of the images other than the detailed information PDi is continued even during the period from time t2 to time t3.

On the other hand, when there is a movement of the angle of view VA from the superimposed position VP2 to the normal position VP1, the meter ECU 32 restarts the screen display of the detailed information PDi at the timing when the display of the specific content Ctis is finished. As an example, the display of the detailed information PDi is resumed at the time t3 when the movement of the angle of view VA is started. As described above, even after the specific content Ctis is hidden, the state in which the information provided by the specific content Ctis can be confirmed is maintained.

Next, a plurality of scenes in which the angle of view VA is moved from the normal position VP1 to the superimposed position VP2 to display the specific content Ctis will be described below with reference to FIGS. 1 to 4 based on FIGS. 5 to 31. do.

<Lane deviation warning>
5 to 10 illustrate a plurality of patterns of lane deviation warnings implemented by the display system 110. 5 to 7 show the lane deviation warning of pattern 1, FIGS. 5, 6 and 7 show the lane deviation warning of pattern 2, and FIGS. 5, 9 and 10 show the lane deviation warning. Shows a pattern 3 lane departure warning.

The display control unit 73 displays the speedometer CTv on the angle of view VA at the normal position VP1 before the lane deviation warning of the patterns 1 to 3 is started (see the upper part of FIG. 5). The speedometer CTv is a non-superimposed content CTn that digitally displays the vehicle speed. The display control unit 73 decides to execute the lane deviation warning by using the acquisition of the lane deviation information by the information acquisition unit 71 as a trigger. The display control unit 73 displays the blinking background CTB while continuing the display of the speedometer CTv (see the lower part of FIG. 5).

The blinking background CTB is a non-superimposed content CTn displayed as the first related content CTr1. The blinking background CTB is a horizontally long rectangular image that fills the entire angle of view VA. The blinking background CTB is displayed so as to be the background of the speedometer CTv so as not to interfere with the visual recognition of the speedometer CTv. The blinking background CTB is a virtual image Vi of a warning color such as red. After blinking a plurality of times, the blinking background CTB ends the display together with the speedometer CTv at time t1.

In the lane deviation warning of pattern 1, when the movement of the angle of view VA is started at time t1, the display control unit 73 starts displaying the guidance content CTGn (see the upper part of FIG. 6). The guided content CTGn is a non-superimposed content CTn displayed as the second related content CTr2. The guided content CTGn is a related content CTr having a mode different from that of the blinking background CTB, and is a non-blinking image displayed so as to fill a part of the angle of view VA. The guided content CTGn has a horizontally long rectangular shape in contact with the lower edge of the angle of view VA, and is regarded as a virtual image Vi of a warning color such as red as in the blinking background CTB. The vertical width of the guided content CTGn is set to be about half to one-third of the vertical angle of view at the start of display. The display control unit 73 moves the entire guided content CTGn upward from the driver's point of view while reducing the guided content CTGn in the vertical direction in accordance with the upward movement of the angle of view VA (see the lower part of FIG. 6). .. The display control unit 73 ends the display of the guided content CTGn before the time t2 when the angle of view VA reaches the superimposed position VP2.

When the display control unit 73 completes the movement of the angle of view VA to the superimposed position VP2 at time t2, the display control unit 73 starts displaying the deviation warning content CTdw (see the upper part of FIG. 7). The deviation warning content CTdw is the specific content CTis in the lane deviation warning. The deviation warning content CTdw is a superposed content CTs that targets the road surface of the own lane in the foreground as an object of superimposition, and warns the deviation of the vehicle A from the running own lane. The deviation warning content CTwd includes a road surface superimposed image Prs and a boundary-enhanced image Pel.

The road surface superimposed image Prs is displayed as a virtual image in a warning color such as red, and is superimposed and displayed so as to fill a part of the road surface in front of the own lane. When the vehicle A is likely to deviate from the lane marking Lml on the left side, the road surface superimposed image Prs is superimposed in the vicinity of the lane marking Lml on the left side of the own vehicle. The road surface superimposed image Prs is displayed as an animation of repeatedly moving from the lane marking Lml on the left side of the vehicle to the lane marking Lmr on the right side of the vehicle (see the lower part of Fig. 7), and the driver is to move to the center of the vehicle lane. prompt.

The boundary-enhanced image Pel is an image having a display color (for example, white) different from that of the road surface superimposed image Prs. When the vehicle A is likely to deviate to the left side of the own lane, the boundary-enhanced image Pel has a shape extending in a strip shape along the lane marking Lml on the left side of the lane, and is between the road surface superimposed image Prs and the lane marking Lml. Be placed. The boundary-enhanced image Pel repeats the display and non-display states in accordance with the animation of the road surface superimposed image Prs, and is hidden at the timing when the road surface superimposed image Prs leaves the lane marking Lml (see the lower part of FIG. 7). When the vehicle A is likely to deviate to the right side of the own lane, the road surface superimposed image Prs and the boundary-enhanced image Per are displayed on the right side of the own vehicle along the lane marking Lmr.

In the lane deviation warning of pattern 2, when the movement of the angle of view VA is started at time t1, the display control unit 73 starts displaying the road surface superimposed image Prs and the guidance content CTGs (see the upper part of FIG. 8). The road surface superimposed image Prs and the guided content CTGs are superimposed content CTs displayed as the second related content CTr2.

The road surface superimposed image Prs is a part of the deviation warning content CTwd (see FIG. 9), and is superimposed and displayed at a position facing the lane marking Lml on the deviation side so as to fill a part of the road surface in front of the own lane. .. The road surface superimposed image Prs may be superimposed content CTs that approach the own vehicle together with the front road surface, or may be superimposed content CTs superimposed on the front road surface at a predetermined distance from the own vehicle.

The guided content CTGs are related content CTrs having a mode different from that of the blinking background CTB (see FIG. 5), and are displayed so as to fill a part of the angle of view VA. The guided content CTGs are virtual images Vi such as red that have a horizontally long rectangular shape in contact with the lower edge of the angle of view VA, similarly to the guided content CTGn of pattern 1 (see FIG. 6). The guidance content CTGs are arranged on the front side of the road surface superimposed image Prs when viewed from the driver. The display control unit 73 moves the guided content CTGs toward the vanishing point in the foreground while moving the angle of view VA upward. Specifically, the guided content CTGs are reduced in the vertical and horizontal directions while maintaining the aspect ratio in accordance with the upward movement of the angle of view VA, and are moved upward so as to fit between the lane markings Lml and Lmr. Move (see the lower part of Fig. 8). Due to such a change in mode, the guidance contents CTGs are visually recognized as moving to the back side in the own lane, and guide the driver's line of sight to a distance.

When the display control unit 73 completes the movement of the angle of view VA to the superimposed position VP2 at time t2, the display control unit 73 starts displaying the deviation warning content CTdw (see the upper part of FIG. 9). The deviation warning content CTdw of the pattern 2 is the superimposed content CTs including the road surface superimposed image Prs and the boundary-enhanced image Pel. As described above, the road surface superimposed image Prs starts to be displayed during the movement of the angle of view VA, and continues to be displayed even after the movement of the angle of view VA is completed. The road surface superimposed image Prs is superimposed on the front road surface at a predetermined distance from the own vehicle.

The boundary-enhanced image Pel is drawn in, for example, white, and is displayed superimposed on the road surface superimposed image Prs. The boundary-enhanced image Pel is drawn in a triangular shape pointing to the center side so as to prompt the driver to move to the center of the own lane. The display control unit 73 displays a plurality of boundary-enhanced images Per at predetermined intervals along the division line Lml on the deviation side. The plurality of boundary-enhanced images Pel move on the road surface superimposed image Prs along the lane marking Lml while being enlarged according to the traveling of the own vehicle, and are visually recognized by the driver as approaching the own vehicle together with the front road surface (). See the bottom of FIG. 9).

In the lane deviation warning of the pattern 3, the display of the guidance contents CTGs (see FIG. 8) of the pattern 2 is omitted. The display control unit 73 displays the road surface superimposed image Prs as the second related content CTr2 (see the upper part of FIG. 10). The road surface superimposed image Prs is superimposed and displayed in an arrangement facing the deviating side lane marking Lml, and as the angle of view VA moves upward, it is directed toward the vanishing point in the foreground within a range that does not protrude from the own lane. It is enlarged (see the upper part of FIG. 10). The road surface superimposed image Prs is continuously displayed in the angle of view VA of the superimposed position VP2 as a part of the deviation warning content CTdw even after the movement of the angle of view VA is completed (see FIG. 9).

<Notification of change in ACC status>
11 to 19 illustrate a plurality of patterns of ACC status change notifications executed by the display system 110. 11 to 13 show the ACC status change notification of the pattern 1, and FIGS. 11, 14, and 15 show the ACC status change notification of the pattern 2. Further, FIGS. 11, 16 and 17 show a change notification of the ACC status of the pattern 3, and FIGS. 11, 18 and 19 show a change notification of the ACC status of the pattern 4.

When the ACC function is operating in the driving support ECU 23, the target vehicle speed CTts and the target vehicle-to-vehicle distance CTtd are displayed on the angle of view VA at the normal position VP1 in addition to the speedometer CTv (see the upper part of FIG. 11). The target vehicle speed CTts and the target vehicle-to-vehicle distance CTtd are non-superimposed content CTn indicating control target values set in the ACC function. The target vehicle speed CTts indicates the vehicle speed that is the upper limit when the ACC function makes the vehicle A cruise at a constant speed. The target inter-vehicle distance CTtd indicates the length of the inter-vehicle distance (hereinafter referred to as the target inter-vehicle distance) when the ACC function causes the vehicle A to follow the preceding vehicle Af.

The ACC status change notification is executed when the target inter-vehicle distance set in the ACC function is changed (longer) by the driver (see the lower part of FIG. 11). The display before the ACC status change notification is started is common to patterns 1 to 4. The display control unit 73 determines the execution of the ACC status change notification triggered by the acquisition of the status information indicating the change in the target inter-vehicle distance, and the speedometer CTv and the target before the time t1 when the movement of the angle of view VA is started. The vehicle speed CTts is hidden.

In the ACC status change notification of the pattern 1, when the movement of the angle of view VA is started at the time t1, the display control unit 73 gradually reduces the display luminance of the target vehicle-to-vehicle CTtd. Due to such a change in the tone-down display, the target vehicle-to-vehicle CTtd is hidden during the travel period TM1. In addition, the display control unit 73 starts displaying the partial display content CTus (see FIG. 12).

The partially displayed content CTus is displayed as the related content CTr. The partial display content Ctus is a part of the specific content Ctis (see FIG. 13) displayed after the movement of the angle of view VA is completed. When the angle of view VA moves upward, the lower portion of the specific content Ctis is displayed as the partial display content Ctus. The partial display content CTus are superimposed content CTs including a block image Pdb and a set of lane marking images Pbl, and are superimposed and displayed on the front road surface.

When the display control unit 73 completes the movement of the angle of view VA to the superimposed position VP2 at time t2, the display control unit 73 starts displaying the inter-vehicle distance notification content CTfd (see the upper part of FIG. 13). The inter-vehicle notification content CTfd is the specific content CTis in the ACC status change notification. The inter-vehicle distance notification content CTfd is a superimposition content CTs that targets the road surface of the own lane in the foreground as an object of superimposition. Notify the driver of the implementation of deceleration control to increase the inter-vehicle distance. The inter-vehicle notification content CTfd includes a block image Pdb and a set of lane marking images Pbl.

The block image Pdb is a trapezoidal image that is displayed as a virtual image in blue, green, or the like and is superimposed on the center of the road surface ahead of the own lane. The block image Pdb is displayed below the preceding vehicle Af so as not to overlap the preceding vehicle Af in terms of the driver's appearance. When the inter-vehicle distance to the preceding vehicle Af is increased by the deceleration control by the ACC function, the display control unit 73 increases the number of block images Pdb displayed below the preceding vehicle Af (see the upper part of FIG. 13).

The lane marking image Pbl is displayed as a virtual image in blue or green, which is substantially the same as the block image Pdb, and is superimposed on both sides of the block image Pdb one by one. Each lane marking image Pbl is a strip-shaped image extending from the vehicle side toward the vanishing point along the adjacent lane markings Lml and Lmr. The lane marking image Pbl is allowed to overlap with the preceding vehicle Af in appearance of the driver, and extends diagonally from the lower edge to the upper edge of the angle of view VA at the overlapping position VP2.

When the change of the target inter-vehicle distance by the ACC function is completed, the display control unit 73 ends the ACC status change notification and returns the angle of view VA to the normal position VP1. The inter-vehicle notification content CTfd may be hidden before the time t3 when the movement of the angle of view VA starts, or may be gradually hidden from the upper side to the lower side according to the movement of the angle of view VA. good. When the display control unit 73 completes the movement of the angle of view VA to the normal position VP1 at time t4, the display control unit 73 resumes the display of the speedometer CTv, the target vehicle speed CTts, and the target vehicle-to-vehicle CTtd (see the upper part of FIG. 11).

Even in the ACC status change notification of pattern 2, when the movement of the angle of view VA is started at time t1, the display control unit 73 hides the target vehicle-to-vehicle CTtd by tone-down and displays the partial display content CTus. Let it start (see Figure 14). The partial display content Ctus is a part of the specific content Ctis (see FIG. 15) displayed after the movement of the angle of view VA is completed, and includes a bar image Pbr and a set of partition wall images Pbb. The display control unit 73 further displays the speedometer CTv together with the partial display content CTus. The bar image Pbr, the partition wall image Pbb, and the speedometer CTv are gradually displayed from the lower side to the upper side according to the movement of the angle of view VA.

When the display control unit 73 completes the movement of the angle of view VA to the superimposed position VP2 at time t2, the display control unit 73 starts displaying the inter-vehicle distance notification content CTfd (see the upper part of FIG. 15). The inter-vehicle distance notification content CTfd includes the bar image Pbr described above and a set of compartment wall images Pbb. The bar image Pbr is an image corresponding to the block image Pdb of pattern 1 (see FIG. 13), and has a shape extending horizontally in a rod shape. The bar image Pbr is displayed between the preceding vehicle Af and the speedometer CTv in the appearance of the driver. When the inter-vehicle distance to the preceding vehicle Af is increased by the deceleration control of the ACC function, the number of bar images Pbr displayed below the preceding vehicle Af increases (see the lower part of FIG. 15).

The partition wall image Pbb is an image corresponding to the partition line image Pbl (see FIG. 13) of the pattern 1, and is superimposed on both sides of the bar image Pbr and the speedometer CTv. Each partition wall image Pbb includes a plurality of wall-shaped image portions erected above the road surface, and is arranged in a wall shape along adjacent division lines Lml and Lmr. Each section wall image Pbb increases the number of image portions of the wall shape when the inter-vehicle distance to the preceding vehicle Af is increased by the deceleration control by the ACC function (see the lower part of FIG. 15).

Even in the ACC status change notification of the pattern 3, when the movement of the angle of view VA is started at the time t1, the display control unit 73 starts the display of the partial display content CTus while toning down the target vehicle-to-vehicle CTtd. See FIG. 16). The partial display content Ctus is a part of the specific content Ctis (see FIG. 17) displayed after the movement of the angle of view VA is completed, and is a related content CTr of the specific content Ctis. The partial display content CTus includes a block image Pdb and a set of lane marking images Pbl superimposed and displayed on the front road surface. The block image Pdb and the division line image Pbl are gradually displayed from the lower side to the upper side in accordance with the upward movement of the angle of view VA.

When the display control unit 73 completes the movement of the angle of view VA to the superimposed position VP2 at time t2, the display control unit 73 draws the entire block image Pdb and each lane marking image Pbl, thereby drawing the entire inter-vehicle distance notification content CTfd as the specific content Ctis. Is started (see the upper part of FIG. 17). The block image Pdb is drawn in a trapezoidal frame shape, and includes an emphasizing portion that emphasizes the preceding vehicle Af from below. When the inter-vehicle distance to the preceding vehicle Af is increased by the deceleration control of the ACC function, a plurality of block images Pdb are continuously drawn below the emphasized portion (see the lower part of FIG. 17). The lane marking image Pbl is a strip-shaped image substantially the same as the lane marking image Pbl (see FIG. 13) of pattern 1. Each division line image Pbl is arranged on both the left and right sides of the block image Pdb in a posture along the division lines Lml and Lmr.

Even in the ACC status change notification of pattern 4, when the movement of the angle of view VA is started at time t1, the display control unit 73 displays the partial display content CTus and the speedometer CTv while toning down the target vehicle-to-vehicle CTtd. (See FIG. 18). The partial display content Ctus is a part of the specific content Ctis (see FIG. 19) and is a related content CTr of the specific content Ctis. The partial display content CTus are superimposed content CTs including the block image Pdb and the division line image Pbl. The block image Pdb, each division line image Pbl, and the speedometer CTv are gradually displayed from the lower side to the upper side in accordance with the upward movement of the angle of view VA.

When the display control unit 73 completes the movement of the angle of view VA to the superimposed position VP2 at time t2, the display control unit 73 starts displaying the inter-vehicle distance notification content CTfd as the specific content Ctis. (See the upper part of FIG. 19). The inter-vehicle distance notification content CTfd is displayed behind the speedometer CTv. The inter-vehicle distance notification content CTfd includes a bar image Pbr in addition to the block image Pdb and the lane marking image Pbl that are started to be displayed while the angle of view VA is moving. The block image Pdb and the lane marking image Pbl are substantially the same images as the pattern 1 (see FIG. 13). The bar image Pbr is superimposed on the road surface below the preceding vehicle Af and emphasizes the preceding vehicle Af from below. When the inter-vehicle distance to the preceding vehicle Af is increased by the deceleration control of the ACC function, the display control unit 73 additionally displays a plurality of block images Pdb under the bar image Pbr while moving the bar image Pbr upward. (See the lower part of FIG. 19).

<Turn-by-turn display>
20 to 25 illustrate a plurality of patterns of route guidance implemented by the display system 110. 20 to 22 show a turn-by-turn display in the route guidance of the pattern 1, and FIGS. 20, 21 and 23 show a turn-by-turn display of the pattern 2. Further, FIGS. 20, 21 and 24 show the turn-by-turn display of the pattern 3, and FIGS. 20, 21 and 25 show the turn-by-turn display of the pattern 4.

When the navigation ECU 22 guides the route to the destination, the route icon CTir is displayed in addition to the speedometer CTv on the angle of view VA at the normal position VP1 as the guidance point approaches (Fig.). See the bottom of 20). The guidance point is set based on a specific node in the guidance area such as an intersection, a confluence section, and a branch section.

The route icon CTir is a non-superimposed content CTn indicating the remaining distance to the guide point and the direction such as turning left or right at the guide point. The display control unit 73 decides to perform the turn-by-turn display by using the fact that the route information about the latest guidance area is acquired by the information acquisition unit 71 as a trigger. After displaying the route icon CTir, the display control unit 73 hides all the contents including the speedometer CTv and the route icon CTir, and starts moving the angle of view VA to the superimposed position VP2.

When the display control unit 73 starts moving the angle of view VA at time t1, the display control unit 73 starts displaying the lane-enhanced content CTEL in the movement period TM1 in which the angle of view VA moves (see FIG. 21). The lane-enhanced content CTel has superimposed content CTs displayed as related content CTr, and is superimposed on the road surface of the own lane in the foreground to emphasize the running own lane. The lane-enhanced content CTEL is a strip-shaped image arranged inside the left and right dividing lines Lml and Lmr (see the upper part of FIG. 21). The lane-enhanced content CTEL extends along the respective division lines Lml and Lmr as the angle of view VA moves upward (see the lower part of FIG. 21). As described above, when the turn-by-turn display is performed, the process of displaying the lane-enhanced content CTel as the related content CTr is common to the patterns 1 to 4.

In the turn-by-turn display of the pattern 1, when the movement of the angle of view VA to the superimposed position VP2 is completed at the time t2, the display of the route guidance content CTrg as the specific content Ctis is started (see the upper part of FIG. 22). The route guidance content CTrg includes an approach notification image Pap and a point notification image Ptp.

The approach notification image Pap is displayed near the lower edge of the angle of view VA at time t2. The approach notification image Pap has a plurality of triangular image portions indicating the turning direction of the own vehicle at the guide point. As the own vehicle approaches the guide point, the display control unit 73 gradually moves the approach notification image Pap to the center of the angle of view VA (see the lower part of FIG. 22).

The point notification image Ptp is superimposed and displayed on the guide point as if it were floating from the road surface. Like the approach notification image Pap, the point notification image Ptp has a plurality of triangular image portions indicating the turning direction of the own vehicle. The point notification image Ptp is displayed in the angle of view VA after the approach notification image Pap, and moves to the center of the angle of view VA as the vehicle approaches the guide point. The point notification image Ptp collides with the approach notification image Pap that has moved upward at the timing when the own vehicle enters the intersection. The point notification image Ptp and the approach notification image Pap are integrated after a collision in appearance, and become non-superimposed content CTn that clearly indicates the turning direction of the own vehicle to the driver.

When the own vehicle exits from the intersection which is the guidance point, the display control unit 73 hides the route guidance content CTrg and then starts moving the angle of view VA to the normal position VP1. The display control unit 73 restarts the display of the speedometer CTv after a predetermined time after completing the movement of the angle of view VA to the normal position VP1 (see the upper part of FIG. 20).

In the turn-by-turn display of the pattern 2, even after the movement of the angle of view VA to the superimposed position VP2 is completed at time t2, the display of the pair of lane-enhanced contents CTEL is continued (see the upper part of FIG. 23). The display control unit 73 continues to emphasize the own lane by the lane-enhanced content CTEL for a predetermined time, and then switches the display object included in the route guidance content CTrg from the lane-enhanced content CTEL to the approach notification image Pap (middle of FIG. 23). reference). The approach notification image Pap has a plurality of triangular image portions indicating the turning direction of the own vehicle. The plurality of triangular image units are superimposed and displayed in a row in the center of the road surface of the own lane along the traveling direction of the own vehicle. As the vehicle approaches the guide point, each image unit continuously moves below the angle of view VA and frames out in order.

The display control unit 73 switches the display object included in the route guidance content CTrg from the approach notification image Pap to the point notification image Ptp at the timing when the own vehicle enters the intersection (see the lower part of FIG. 23). The point notification image Ptp is a non-superimposed content CTn formed by combining a plurality of triangular image portions indicating a turning direction. The point notification image Ptp continues to be displayed until the vehicle exits the intersection even after starting the right / left turn.

In the turn-by-turn display of the pattern 3, after the movement of the angle of view VA to the superimposed position VP2 is completed at time t2, the display of the pair of lane-enhanced contents CTEL is continued, and the bar image Pbr is additionally displayed. (See the upper part of FIG. 24). The bar image Pbr is an image extending in a rod shape along the horizontal direction of the angle of view VA, and is arranged between the pair of lane-enhanced content CTels.

The display control unit 73 continues to emphasize the own lane by the lane enhancement content CTel and the bar image Pbr for a predetermined time, and then switches the display object included in the route guidance content CTrg to the approach notification image Pap (see the middle part of FIG. 24). .. The approach notification image Pap has an image unit that numerically indicates the remaining distance to the guide point and an arrow-shaped image unit that indicates the direction of turning left or right at the guide point. The approach notification image Pap moves toward the vehicle side together with the road surface as the vehicle approaches the guide point, and flames out in order from the angle of view VA.

The display control unit 73 switches the display object included in the route guidance content CTrg from the approach notification image Pap to the point notification image Ptp at the timing when the guidance point enters the angle of view VA (see the lower part of FIG. 24). The point notification image Ptp is a horizontally long rectangular image in which a triangular hole indicating the turning direction is formed. The point notification image Ptp is displayed in substantially the entire angle of view VA at the superimposed position VP2. The point notification image Ptp continues to be displayed until the vehicle exits the intersection even after the right / left turn is started.

In the turn-by-turn display of the pattern 4, after the movement of the angle of view VA to the superimposed position VP2 is completed at time t2, the display of the route guidance content CTrg including the approach notification image Pap is started. The approach notification image Pap consists of a plurality of block-shaped image parts (hereinafter referred to as fixed image parts) stacked in the right corner of the angle of view VA, and a plurality of block-shaped image parts (hereinafter, fixed image parts) superimposed on the road surface and approaching the own vehicle. Hereinafter, the moving image unit) is included (see the lower part of FIG. 25). The fixed image section at the bottom disappears due to a collision with a moving image section approaching the own vehicle (see the middle section of FIG. 25). By repeating such animation, the approach notification image Pap indicates to the driver that the guide point is approaching.

The display control unit 73 switches the display object included in the route guidance content CTrg from the approach notification image Pap to the point notification image Ptp at the timing when the guidance point enters the angle of view VA (see the lower part of FIG. 25). The point notification image Ptp is a non-superimposed content CTn including a plurality of triangular image portions indicating a turning direction. Even in the turn-by-turn display of pattern 4, the point notification image Ptp continues to be displayed until the vehicle exits the intersection.

<Sign recognition support display>
26 to 31 illustrate a plurality of patterns of the sign recognition support display performed by the display system 110. The related content CTr is not displayed in the sign recognition support display. 26 to 28 show the sign recognition support display of the pattern 1, and FIGS. 26, 28 and 29 show the sign recognition support display of the pattern 2. Further, FIGS. 26, 28 and 30 show the sign recognition support display of the pattern 3, and FIGS. 26, 28 and 31 show the sign recognition support display of the pattern 4.

When the sign recognition function of the camera ECU 21 is activated, the sign icon CTrs is displayed on the angle of view VA at the normal position VP1 in addition to the speedometer CTv (see FIG. 26). The sign icon CTrs is a non-superimposed content CTn that imitates a road sign RS (for example, a speed limit of 60 km / h) recognized in the past. When the camera ECU 21 newly detects the road sign RS in front of the own vehicle, the camera ECU 21 outputs the recognition information about the detected road sign RS to the HUD 100. The display control unit 73 determines the implementation of the sign recognition support display triggered by the acquisition of the recognition information of the road sign RS by the information acquisition unit 71. In the sign recognition support display of patterns 1 to 4, the content such as the speed meter CTv and the sign icon CTrs or the recognition support content CTra (see FIG. 27) before the movement of the angle of view VA is started at the time t1 and t3. Is hidden. In addition, in the sign recognition support display of patterns 1 to 4, the display of all contents is temporarily interrupted during the movement periods TM1 and TM2 of the angle of view VA.

In the sign recognition support display of the pattern 1, the recognition support content CTRA is started to be displayed in the angle of view VA moved to the superimposed position VP2 at time t2 (see the upper part of FIG. 27). The display control unit 73 first displays the change notice image Ppn as the recognition support content CTra. The change notice image Ppn is an image imitating the road sign RS, and shows the content of the newly detected road sign RS (for example, the speed limit of 40 km / h). The change notice image Ppn is drawn with a lower saturation than the sign icon CTrs (see FIG. 26), and is displayed as a virtual image in a size larger than the sign icon CTrs.

When the road sign RS approaches, the display control unit 73 further displays the point notification image Ptp in addition to the change notice image Ppn (see the middle section of FIG. 27). The point notification image Ptp is a bar-shaped image extending in the horizontal direction, and is superimposed and displayed on the road surface in front of the own vehicle with reference to the installation position of the road sign RS. The point notification image Ppt approaches the change notice image Ppn together with the road surface in front of the own vehicle. The display control unit 73 highlights the change notice image Ppn by temporarily increasing the luminance and saturation at the timing when the point notification image Ppt comes into contact with the change notice image Ppn (see the lower part of FIG. 27).

After finishing the display of the recognition support content CTRA, the display control unit 73 starts moving the angle of view VA to the normal position VP1 at time t3. The display control unit 73 restarts the display of the speedometer CTv and the sign icon CTrs after the time t4 when the movement of the angle of view VA to the normal position VP1 is completed (see FIG. 28). The redisplayed sign icon CTrs has the same content (speed limit 40 km / h) as the change notice image Ppn that was hidden immediately before.

In the sign recognition support display of the pattern 2, the recognition support content CTRA is started to be displayed by the animation in which the change notice image Ppn is framed in from the lower edge of the angle of view VA moved to the superimposed position VP2 (see the upper part of FIG. 29). Similar to pattern 1, the display control unit 73 further displays the point notification image Ppt and then causes the point notification image Ppt to collide with the change notice image Ppn (see the middle section of FIG. 29). After the point notification image Ppt and the change notice image Ppn are brought into contact with each other, the display control unit 73 tilts the change notice image Ppn to the back side in the emphasized state and changes the posture to stick to the road surface (see the lower part of FIG. 29). ).

In addition, the display control unit 73 displays the ripple image Pw instead of the point notification image Ptp. The ripple image Pw is a bar-shaped image extending in the horizontal direction, and is superimposed and displayed on the road surface of the own lane. The ripple image Pw suggests a section in which the new road sign RS is effective by moving at high speed in the traveling direction along the own lane. The display control unit 73 ends the display of the recognition support content CTRA at the timing when the ripple image Pw is framed out from the angle of view VA, and starts the process of returning the angle of view VA to the normal position VP1.

In the sign recognition support display of the pattern 3, the speedometer CTv is displayed in addition to the recognition support content CTra in the angle of view VA moved to the superimposed position VP2. The recognition support content CTRA includes a change notice image Ppn and a current marker image Psp. The change notice image Ppn is currently displayed on the back side of the marker image Psp (see the upper part of FIG. 30). The change notice image Ppn moves to the vehicle side together with the road surface in front of the vehicle and approaches the current sign image Psp (see the middle part of FIG. 30).

The current sign image Psp is an image imitating the road sign RS as in the change notice image Ppn (see the upper part of FIG. 30). The current sign image Psp shows the same content (speed limit 60 km / h) as the sign icon CTrs (see FIG. 28) that was hidden immediately before. The present marker image Psp is displayed at a predetermined position in the angle of view VA on the front side of the change notice image Ppn.

The display control unit 73 collides the change notice image Ppn moving to the own vehicle side with the current sign image Psp, and ends the display of the current sign image Psp (see the lower part of FIG. 30). The display control unit 73 displays the change notice image Ppn of the enhanced mode with enhanced brightness and saturation as the non-superimposed content CTn instead of the current marker image Psp. After that, the display control unit 73 ends the display of the recognition support content CTRA and starts moving the angle of view VA to the normal position VP1.

In the sign recognition support display of the pattern 4, the change notice image Ppn and the point notification image Ptp which are substantially the same as the pattern 2 are displayed as the recognition support content CTra (see the upper and middle stages of FIG. 31). In pattern 4, the mode of the ripple image Pw is different from that of pattern 2. Specifically, the display control unit 73 tilts the change notice image Ppn to the back side, and then displays an arc-shaped ripple image Pw that radiates from the change notice image Ppn (see the lower part of FIG. 31). The display control unit 73 repeatedly displays the animation in which the ripple image Pw spreads starting from the change notice image Ppn a plurality of times, and then ends the display of the recognition support content CTRA.

The details of the display control process for realizing the virtual image display method described so far will be described with reference to FIGS. 1 and 4 based on FIGS. 32 and 33. The display control process shown in FIG. 32 is a process of displaying the content in association with the position of the angle of view VA, and is started by the head-up ECU 70 that has completed the initial process after the start-up. The display control process shown in FIG. 33 is a process of changing the state of the detailed information PDi on the display screen according to the movement of the angle of view VA by the HUD 100, and is started by the meter ECU 32 that has completed the initial process after the start-up.

In S101 of the display control process shown in FIG. 32, a signal indicating on / off of the AR switch 68 is detected, and the process proceeds to S102. In S102, based on the signal detected in S101, it is determined whether or not the AR function for displaying the superimposed content CTs in the angle of view VA moved to the superimposed position VP2 is in the ON state. If it is determined in S102 that the AR function is in the off state, the process proceeds to S112. On the other hand, if it is determined in S102 that the AR function is in the ON state, the process proceeds to S103.

In S103, the position of the angle of view VA and the content to be displayed as a virtual image are determined by referring to the look-up table 81 based on various information acquired by the information acquisition unit 71, and the process proceeds to S104. In S104, based on the determination in S103, it is determined whether or not the switching operation for switching the position of the angle of view VA is necessary. If it is determined in S104 that the switching operation is unnecessary and the current angle of view position is maintained, the process proceeds to S111. On the other hand, if it is determined in S104 that the switching operation is necessary, the process proceeds to S105.

In S105, the direction of the switching operation is determined. When moving the angle of view VA from the superimposed position VP2 to the normal position VP1, the process proceeds from S105 to S106. In S106, all the display of the virtual image Vi is terminated, and the process proceeds to S107. In S107, the concave mirror of the magnifying optical system 62 is rotated based on the mirror position data 82 associated with the normal position VP1 to move the angle of view VA to the normal position VP1.

On the other hand, when the angle of view VA is moved from the normal position VP1 to the superimposed position VP2, the process proceeds from S105 to S108. In S108, the graphic data 84 is referred to, the display of the first related content CTr1 is started, and the process proceeds to S109. In S109, the movement of the angle of view VA to the superimposed position VP2 by the rotation of the concave mirror is started based on the mirror position data 83 associated with the superimposed position VP2, and the process proceeds to S110. In S110, the graphic data 85 is referred to, the display of the second related content CTr2 is started, and the process proceeds to S111. If there is no first related content CTr1 associated with the specific content Ctis, S108 may be omitted. Similarly, if there is no second related content CTr2 associated with the specific content Ctis, S110 may be omitted.

In S111, the angle of view position is determined. If it is determined in S111 that the normal position VP1 is maintained or the movement to the normal position VP1 is completed, the process proceeds to S112. In S112, the angle of view VA is set to the normal position VP1 based on the mirror position data 82, and the process proceeds to S113. In S113, the graphic data 84 is referred to, and the display of the non-superimposed content CTn determined in S103 is started. If the mirror position data 82 of the normal position VP1 has already been read in S107, S112 may be omitted.

On the other hand, if it is determined in S111 that the superimposition position VP2 is maintained or the movement to the superimposition position VP2 is completed, the process proceeds to S114. In S114, the angle of view VA is set to the superimposed position VP2 based on the mirror position data 83, and the process proceeds to S115. In S115, the graphic data 85 is referred to, and the display of the superimposed content CTs determined in S103 is started. If the mirror position data 83 of the superimposed position VP2 has already been read in S109, S114 may be omitted.

In S31 of the display control process shown in FIG. 33, the position of the angle of view VA set by the HUD 100 is grasped by sharing information with the head-up ECU 70, and the process proceeds to S32. In S32, the presence or absence of the switching operation of the angle of view position is grasped based on the information grasped in S31. When it is determined in S32 that the angle of view position is maintained, the current detailed information PDi display or non-display state is maintained. In the first process after startup, a process for starting the display of the detailed information PDi may be appropriately performed.

If it is determined in S32 that there is a switching operation, the process proceeds to S33. In S33, the moving direction of the angle of view VA is determined. If it is determined in S33 that the angle of view VA is moved to the normal position VP1, the process proceeds to S34. In S34, the HUD 100 waits for the display of the superimposed content CTs to be turned off, and proceeds to S35 at the timing when the superimposed content CTs are hidden. In S35, the display of the detailed information PDi is started. As described above, the detailed information PDi is displayed on the display screen so that the driver can confirm it at any time during the period when the angle of view VA is at the normal position VP1.

If it is determined in S33 that the angle of view VA is moved to the superimposed position VP2, the process proceeds to S36. In S36, the process waits for the start of movement of the angle of view VA, and proceeds to S37 at the timing when the movement of the angle of view VA is started. In S37, the tone down of the detailed information PDi is started. As a result, in the moving period TM1 of the angle of view VA from the normal position VP1 to the superposed position VP2, a mode change is carried out to reduce the visibility of the detailed information PDi. In addition, in S37, the detailed information PDi is hidden at the timing when the angle of view movement to the superimposed position VP2 is completed by continuing the tone down.

According to the first embodiment described so far, the related content CTr related to the specific content Ctis is displayed before the movement of the angle of view VA from the normal position VP1 to the superimposed position VP2 is completed. Therefore, the time lag until the display starts due to the movement of the angle of view VA by the actuator 63 is less likely to be perceived by the occupant of the vehicle A such as the driver. Therefore, even if the actuator 63 is provided to expand the angle of view VA capable of displaying a virtual image, the discomfort of the display can be reduced. As a result, it becomes possible to enhance the convenience of the HUD100.

In particular, when information is presented using superimposed content CTs in a highly urgent scene, reduction of the time lag is indispensable for prompt start of notification. Therefore, the process of promptly issuing the related content CTr to the specific content Ctis can effectively improve the convenience of displaying the virtual image.

In addition, in the first embodiment, the display of the related content CTr (first related content CTr1) is started before the time t1 (see FIG. 4) when the movement of the angle of view VA by the actuator 63 is started. As an example, with the implementation of the lane departure warning, the blinking background CTB is displayed as the related content CTr before the movement of the angle of view VA starts. Since the display of the related content CTr is started immediately after the switching of the angle of view position is determined, the delay feeling of the display perceived by the driver can be reduced. As a result, the driver can easily feel that the system on the vehicle side is operating normally.

Further, in the first embodiment, the second related content CTr2 having a mode different from that of the first related content CTr1 is displayed during the movement of the angle of view VA by the actuator 63 (movement period TM1, see FIG. 4). As an example, with the implementation of the lane deviation warning, after the display of the blinking background CTB is completed, the guided contents CTGn and CTGs are displayed as the second related contents CTr2 in the moving angle of view VA. By displaying the first related content CTr1 and the second related content CTr2 in different modes at different angle of view positions, the driver's line of sight can be guided toward the superimposed position VP2 where the specific content Ctis is displayed. As a result, the driver can smoothly perceive the specific content Ctis, so that a highly convenient virtual image display is realized.

Further, in the first embodiment, the display of the related content CTr is started while the angle of view VA is being moved by the actuator 63 (movement period TM1, see FIG. 4). As an example, along with the implementation of the ACC status change notification, the partially displayed content CTus is displayed as the related content CTr in the moving angle of view VA. Since such a related content CTr is continuously visually recognized as the specific content Ctis displayed at the superimposed position VP2, it can exert an action of gently guiding the driver's line of sight to the specific content Ctis. According to the above, since the driver can smoothly perceive the specific content Ctis, a highly convenient virtual image display is realized.

In addition, in the first embodiment, the superimposed position VP2 is defined above the normal position VP1, and the display control unit 73 superimposes and displays the specific content Ctis on the object in the foreground. According to the operation of the HUD 100, the highly attractive superimposed content CTs can be displayed at an appropriate timing at a position easily perceived by the driver. Therefore, it is possible to present information that is easy for the driver to understand and that is not bothersome.

On the other hand, the normal position VP1 is arranged below. Since the superimposed content CTs are not displayed in such a normal position VP1, the information density at the normal position VP1 can be appropriately suppressed. According to the above, when the angle of view VA is at the normal position VP1, information presentation that is difficult to feel annoying is carried out.

Further, in the first embodiment, when the deviation warning content CTdw that warns the deviation of the vehicle A is displayed as the specific content Ctis, the guidance content CTGn that moves on the appearance of the driver according to the movement of the angle of view VA is the related content CTr. Is displayed as. Such guided content CTGn can guide the driver's line of sight to the superimposed position VP2 in advance by moving visually even if the virtual image Vi has a simple shape. As a result, the deviation warning content CTdw is easily perceived, and a highly convenient virtual image display is realized.

Further, in the first embodiment, when the deviation warning content CTdw is displayed as the specific content Ctis, the guided content CTGs that move toward the vanishing point during the movement period TM1 of the angle of view VA are displayed as the related content CTr. Such guided content CTGs can guide the driver's line of sight to a distance in the foreground. As a result, the deviation warning content CTdw displayed at the superimposed position VP2 is smoothly visually recognized. Therefore, highly convenient virtual image display becomes possible.

In addition, in the first embodiment, when the inter-vehicle distance notification content CTfd is displayed as the specific content Ctis, the partial display content Ctus which is a part of the inter-vehicle distance notification content CTfd is displayed as the related content CTr in the angle of view VA of the movement period TM1. Will be done. The partial display content CTus can exert a visual effect such as starting the display of the inter-vehicle distance notification content CTfd before the movement of the angle of view VA is completed. As a result, the time lag from changing the setting value of the inter-vehicle distance maintenance control to the start of displaying the inter-vehicle distance notification content CTfd is reduced. By enhancing the response of the display system 110 felt by the driver in this way, it becomes easier for the driver to realize that the system of the vehicle A is responding appropriately.

Further, in the first embodiment, when the route guidance content CTrg for route guidance is displayed as the specific content Ctis, the lane-enhanced content CTr that emphasizes the own lane during traveling is displayed as the related content CTr. Such lane-enhanced content CTEL can predict the future movement trajectory of the own vehicle in cooperation with the route guidance content CTrg. As a result, easy-to-understand route guidance using the expanded angle of view VA can be carried out, so that the convenience of virtual image display is further improved.

Further, according to the display system 110 according to the first embodiment, the meter display device 30 changes the display on the display screen in cooperation with the switching of the position of the angle of view VA by the actuator 63. By linking the virtual image display and the screen display, the driver's line of sight can be appropriately directed to the foreground while facilitating the acquisition of information by the driver. Therefore, highly convenient information presentation is realized.

In addition, in the first embodiment, the detailed information PDi related to the specific content Ctis is displayed on the display screen during the period when the angle of view VA is at the normal position VP1. Then, when the movement of the angle of view VA to the superimposed position VP2 is completed, the detailed information PDi is hidden. In this way, if the detailed information PDi is temporarily hidden, it is unlikely that the driver's invitation by the detailed information PDi will hinder the grasp of the content displayed at the superimposed position VP2 and the forward situation. Therefore, the convenience of the driver can be further ensured.

Further, in the first embodiment, in the moving period TM1 in which the angle of view VA moves from the normal position VP1 to the superposed position VP2, a mode change is carried out to reduce the visibility of the detailed information PDi. As a result, even if the driver's attention is directed to the detailed information PDi, the driver's line of sight may be naturally removed from the detailed information PDi and guided to the virtual image display due to the mode change that lowers the visibility. As a result, it becomes possible to encourage the driver to grasp the forward situation at an appropriate timing.

In the first embodiment, the guided contents CTGn and CTGs correspond to "moving contents", the partial display contents CTus correspond to "a part (of the inter-vehicle notification content)", and the normal position VP1 corresponds to the "first position". The superimposed position VP2 corresponds to the "second position". The meter display device 30 corresponds to the "screen display device", the actuator 63 corresponds to the "switching mechanism", and the HUD 100 corresponds to the "virtual image display device".

(Second embodiment)
The second embodiment of the present disclosure shown in FIGS. 34 and 35 is a modification of the first embodiment. The display system 210 of the second embodiment is composed of a meter display device 30, a HUD 200, and the like. From the meter display device 30 of the second embodiment, the function of outputting the image data used for the virtual image display to the HUD 200 is omitted. All the image data used for displaying the virtual image is generated by the head-up ECU 70.

The HUD200 includes a projection unit 260, a mirror actuator 263 and a unit actuator 264. The projection unit 260 is configured to integrally include the PGU 61 and the magnifying optical system 62. The projection unit 260 is supported by the housing of the HUD 200 in a state where the emission direction of the virtual image light Lvi (see FIG. 1) can be moved up and down.

The mirror actuator 263 and the unit actuator 264 have a configuration corresponding to the actuator 63 (see FIG. 2) of the first embodiment, and mechanically move in the area of the windshield WS that is the projection range PA (see FIG. 1). It is a mechanism to make it. The mirror actuator 263 is a mechanism incorporated in the projection unit 260, and rotates the concave mirror around the rotation axis defined by the concave mirror of the magnifying optical system 62. The unit actuator 264 rotates the entire projection unit 260 with respect to the housing of the HUD 200 around the rotation axis defined by the projection unit 260. The mirror actuator 263 and the unit actuator 264 cooperate with each other to change the emission direction of the virtual image light Lvi from the magnifying optical system 62 toward the windshield WS.

The HUD200 switches the position of the angle of view VA among the three by changing the posture of the projection unit 260 and the magnifying optical system 62 in the projection unit 260. In addition to the normal position VP1 and the superimposition position VP2 that are substantially the same as those in the first embodiment, the HUD200 can move the angle of view VA to the distant position VP3 defined above the superimposition position VP2. Also in the second embodiment, the normal position VP1, the superposed position VP2, and the distant position VP3 may be adjustable according to the body shape of the driver or the like by the user operation by the driver.

The non-superimposed content CTn is mainly displayed at the normal position VP1. As an example, the speedometer CTv and the sign icon CTrs are displayed at the normal position VP1. The superimposed content CTs are not substantially displayed at the normal position VP1. On the other hand, the superimposed content CTs are mainly displayed at the superimposed position VP2 and the distant position VP3. As an example, the lane-enhanced content CTel, the route guidance content CTrg, and the like are displayed at the superimposed position VP2 and the distant position VP3. In particular, for example, the point notification image Ptp is superimposed and displayed on the distant position VP3.

When the head-up ECU 70 moves the angle of view VA from the normal position VP1 to the superimposed position VP2 or the distant position VP3, the head-up ECU 70 displays the related content CTr associated with the specific content Ctis in advance as in the first embodiment (FIG. 21). And FIG. 23). In addition, the head-up ECU 70 can display the related content CTr even when moving from the superposed position VP2 to the distant position VP3.

As described above, the second embodiment also has the same effect as that of the first embodiment, and the time lag until the start of display due to the angle of view movement by each of the actuators 263 and 264 is less likely to be perceived by the driver. Therefore, even if the angle of view VA capable of displaying a virtual image is expanded, the discomfort of the display is reduced, and the convenience of the HUD 200 can be enhanced.

In addition, the HUD200 of the second embodiment can move the angle of view VA to the distant position VP3 in addition to the normal position VP1 and the superimposed position VP2. Based on the above, the range in which the virtual image can be displayed can be further expanded, so that the convenience of the HUD 200 can be further improved. In the second embodiment, the mirror actuator 263 and the unit actuator 264 correspond to the "switching mechanism", and the HUD 200 corresponds to the "virtual image display device".

(Third embodiment)
The third embodiment of the present disclosure shown in FIGS. 36 to 50 is another modification of the first embodiment. In the third embodiment, the radar ECU 24 and the vehicle-mounted communication device 25 are further connected to the communication bus of the vehicle-mounted network to which the HUD100 and the meter display device 30 are connected, in addition to the camera ECU 21, the navigation ECU 22, the driving support ECU 23, and the like. ..

The radar ECU 24 is a circuit device mainly composed of a signal processing circuit included in the radar unit, and is electrically connected to an antenna for transmitting / receiving millimeter waves or quasi-millimeter waves. Similar to the in-vehicle camera (front camera), the radar unit is mounted on the vehicle A (see FIG. 1) in an arrangement and posture in which the detection range is in front of the vehicle. The radar ECU 24 detects the relative position (distance and direction) and relative speed of the target existing in front of the vehicle by receiving the reflected wave of the millimeter wave or the quasi-millimeter wave emitted in front of the vehicle. The radar ECU 24 provides the driving support ECU 23 with information indicating the relative position and relative speed of the detected target as the detection information of the forward target. It should be noted that the vehicle A may be equipped with a plurality of radar units in a posture in which the detection range is the front side, the rear side, and the rear side of the own vehicle. Further, an autonomous sensor other than the camera, the millimeter wave radar, and the like, such as a rider and sonar, may be mounted on the vehicle A.

The in-vehicle communication device 25 is an out-of-vehicle communication unit mounted on the vehicle A, and functions as a V2X (Vehicle to Everything) communication device. The in-vehicle communication device 25 transmits / receives information by wireless communication with a roadside unit installed on the side of the road. The in-vehicle communication device 25 receives target information indicating the position, moving speed, and the like of the moving target entering the intersection from the roadside unit installed at the intersection. Specifically, the vehicle-mounted communication device 25 receives target information regarding vehicles, motorcycles, cyclists, pedestrians, and the like entering the intersection. The in-vehicle communication device 25 provides the received target information to the driving support ECU 23.

The in-vehicle communication device 25 is a position of a parking space PkS that is vacant from a roadside unit installed on the side of a road that can be parked on the road or a roadside unit installed in a parking lot of a facility (for example, a shopping mall). Receive information (hereinafter referred to as parking space information). When the use of the parking space PkS is managed by a specific management center, the in-vehicle communication device 25 may be able to reserve the parking space PkS in cooperation with the navigation ECU 22. The in-vehicle communication device 25 provides the parking space information received from the roadside unit to the navigation ECU 22 and the driving support ECU 23.

Next, the details of the specific content Ctis and the related content CTr displayed by the display system 110 of the third embodiment will be described. The display system 110 has the same lane deviation warning, ACC status change notification, turn-by-turn display, etc. as in the first embodiment, as well as a forward target warning, parking space guidance, narrow road driving support display, and visibility support display. Etc. can be carried out. Hereinafter, a plurality of scenes in which the angle of view VA is moved from the normal position VP1 to the superimposed position VP2 to display the specific content Ctis will be described with reference to FIGS. 36 and 1 based on FIGS. 37 to 50.

<Forward target warning>
In the forward target warning shown in FIGS. 37 and 38, the driver is warned of the presence of the risk target Tr in front approaching the vehicle A. The risk target Tr to be warned is another vehicle, motorcycle, cyclist, pedestrian, etc. recognized by the driving support ECU 23. The forward target warning is executed based on the detection of the risk target Tr by the driving support ECU 23.

The driving support ECU 23 recognizes a moving object in front of the own vehicle based on the detection information acquired from the camera ECU 21 and the radar ECU 24 and the target information acquired through the in-vehicle communication device 25. The driving support ECU 23 is a moving object that approaches the vehicle A (own vehicle) among the recognized moving objects, and the predicted moving locus intersects with the expected moving locus of the own vehicle. , Detected as a risk target Tr. When the risk target Tr is detected, the operation support ECU 23 provides the head-up ECU 70 and the meter ECU 32 with risk target information indicating that the risk target Tr has been detected and the relative position of the risk target Tr. .. When the driving support ECU 23 detects a plurality of risk target Trs, the operation support ECU 23 may be able to provide risk target information for each risk target Tr.

The display control unit 73 displays the speedometer CTv, which is the non-superimposed content CTn, on the angle of view VA at the normal position VP1 before the forward target warning is started (see the upper part of FIG. 5). The display control unit 73 decides to execute the forward target warning by using the acquisition of the risk target information by the information acquisition unit 71 as a trigger.

When the display control unit 73 decides to execute the foreground object warning, the display control unit 73 displays the warning image Pai and the direction presentation image Ptd while continuing the display of the speedometer CTv (see the upper part of FIG. 37). The warning image Pai and the direction presentation image Ptd are non-superimposed content CTn displayed near the lower edge of the angle of view VA in a layout arranged horizontally with the speedometer CTv. The warning image Pai and the direction presentation image Ptd are displayed as the related content CTr in the forward target warning.

The warning image Pai is displayed as a virtual image in a warning color such as yellow. The warning image Pai is an image for notifying the driver that the risk target Tr has been sensed and giving the driver notice. The warning image Pai is an image mainly composed of an exclamation mark. When the type of the risk target Tr is not specified by the driving support ECU 23, it is desirable that the warning image Pai does not remind the type of the risk target Tr. When the operation support ECU 23 can discriminate the type of the risk target Tr with high accuracy, the mode of the warning image Pai may be appropriately changed to a mode indicating the type of the risk target Tr.

The direction presentation image Ptd is displayed as a virtual image in a display color (for example, yellow) substantially the same as the warning image Pai. The direction presentation image Ptd, when combined with the warning image Pai, notifies the direction in which the risk target Tr is approaching and the moving direction of the risk target Tr. When the risk target Tr is approaching from the right front of the own vehicle, the direction presentation image Ptd is drawn in a V shape pointing to the left direction and displayed on the right side of the warning image Pai. On the other hand, when the risk target Tr is approaching from the left front of the own vehicle, the direction presentation image Ptd is drawn in a V shape pointing to the right direction and displayed on the left side of the warning image Pai.

The display control unit 73 ends the display of the speedometer CTv before starting the movement of the angle of view VA at time t1 (see FIG. 4). When the display control unit 73 starts moving the angle of view VA, the warning image Pai and the direction presentation image Ptd that have already been displayed are used as the guidance content CTGt (see the lower part of FIG. 37). The guidance content CTGt guides the driver's line of sight to the risk target Tr by moving toward the risk target Tr in the foreground while the angle of view VA is moving (movement period TM1, see FIG. 4). Such guided content CTGt may be non-superimposed content CTn or superimposed content CTs.

The display control unit 73 reduces the display size of the guided content CTGt toward the center side of the angle of view VA in accordance with the upward movement of the angle of view VA. As a result, the center of the guided content CTGt moves slightly toward the center side of the angle of view VA in accordance with the upward movement of the angle of view VA. The display control unit 73 hides the guided content CTGt before the movement of the angle of view VA to the superimposed position VP2 is completed. As described above, the guided content CTGt that has moved toward the vanishing point in the foreground and then disappears is displayed.

Here, the display control unit 73 may change the moving direction of the guided content CTGt in the moving period TM1 according to the left-right direction of the risk target Tr. For example, when the risk target Tr is approaching from the right front of the own vehicle, the display control unit 73 shifts the display position of the guidance content CTGt to the right of the angle of view VA during the movement period TM1. On the other hand, when the risk target Tr is approaching from the left front of the own vehicle, the display control unit 73 shifts the display position of the guidance content CTGt to the left of the angle of view VA during the movement period TM1. Based on the above, the guided content CTGt can accurately guide the driver's line of sight toward the risk target Tr.

When the display control unit 73 completes the movement of the angle of view VA to the superimposed position VP2 at the time t2 (see FIG. 4), the display control unit 73 starts displaying the target warning content CTta (see the upper part of FIG. 38). The target warning content CTta is the specific content Ctis in the forward target warning. The target warning content CTta is superimposed content CTs in which the risk target Tr in the foreground is the object of superimposition, and warns the risk target Tr generated in front of the vehicle A. The target warning content CTta is superimposed and displayed at a position separated from the risk target Tr by a certain distance from the driver's appearance so as not to hide the risk target Tr to be superimposed.

The target warning content CTta is an animation display using the base arrow image Pta1 and the emphasized arrow image Pta2 (see the lower part of FIG. 38). The base arrow image Pta1 and the emphasized arrow image Pta2 are V-shaped images indicating the moving direction of the risk target Tr, similarly to the direction presentation image Ptd (see FIG. 37), and are below the risk target Tr in the foreground. It is superimposed on the side. The base arrow image Pta1 is displayed as a virtual image in, for example, white. The emphasized arrow image Pta2 is displayed as a virtual image in a warning color such as yellow and amber, which is more attractive than the base arrow image Pta1. The emphasized arrow image Pta2 repeats the movement toward the base arrow image Pta1 in accordance with the movement direction of the risk target Tr.

When the risk target Tr is approaching from the right front of the own vehicle, the display control unit 73 displays the base arrow image Pta1 and the emphasized arrow image Pta2 pointing to the left in the vicinity of the right edge in the angle of view VA (the display control unit 73). See the lower part of FIG. 38). The display control unit 73 reproduces an animation in which the emphasized arrow image Pta2 displayed on the right side of the base arrow image Pta1 is repeatedly flowed to the left. On the other hand, when the risk target Tr is approaching from the left front of the own vehicle, the display control unit 73 displays the base arrow image Pta1 and the emphasized arrow image Pta2 pointing to the right in the vicinity of the left edge in the angle of view VA. do. The display control unit 73 reproduces an animation in which the emphasized arrow image Pta2 displayed on the left side of the base arrow image Pta1 is repeatedly flowed to the right.

The display control unit 73 ends the display of the target warning content CTta so as not to interfere with the driver's direct visibility of the risk target Tr at the timing when the risk target Tr reaches approximately the center of the angle of view VA. .. The display control unit 73 hides the target warning content CTta and then moves the angle of view VA from the superimposed position VP2 to the normal position VP1. With the above, the forward target warning is completed.

<Parking space information>
In the parking space guidance shown in FIGS. 39 to 42, the vacant parking space PkS (see FIG. 42) is guided to the driver. Parking space guidance is implemented, for example, as part of route guidance by the navigation ECU 22. The navigation ECU 22 asks the driver whether or not to reserve the parking space PkS near the destination when setting the destination and the route. The navigation ECU 22 determines the implementation of the parking space guidance at the end of the route guidance based on the user operation instructing the reservation of the parking space PkS.

The navigation ECU 22 specifies the position of the parking space PkS in which the vehicle A is parked based on the parking space information acquired through the in-vehicle communication device 25. The navigation ECU 22 requests the head-up ECU 70 and the meter ECU 32 to start parking space guidance at a timing when the remaining distance to the specified parking space PkS is less than a predetermined guidance start distance (for example, about 100 m). In the parking space guidance, accurate grasping of the position of the parking space PkS in the vacant state may be assisted by the driving support ECU 23 that acquires the detection information of the camera ECU 21 or the radar ECU 24.

The display control unit 73 starts displaying the parking guidance content CTpn triggered by the acquisition of the parking space guidance implementation request by the information acquisition unit 71 (see the upper part of FIG. 39). The parking guidance content CTpn is displayed in the angle of view VA at the normal position VP1 together with the speedometer CTv. The parking guidance content CTpn is a non-superimposed content CTn, and includes a remaining distance image Prd, a charge image Ppp, and a direction guidance image Ppd.

The remaining distance image Prd is an image showing the remaining distance to the parking space PkS. The charge image Ppp is an image notifying the charge for using the parking space PkS. The parking fee information presented by the fee image Ppp may be included in the parking space information, or may be stored in advance in the map database referred to by the navigation ECU 22. The direction guidance image Ppd is an image showing whether the parking space PkS exists on the left or right side of the own vehicle. The direction guidance image Ppd includes a parking icon Ppi containing the letter "P". The parking icon Ppi is drawn in an inclined posture toward the back when viewed from the driver, and is displayed as if it is attached to the front road surface.

The display control unit 73 continues to display the parking guidance content CTpn until the remaining distance to the parking space PkS is less than a predetermined approach distance (for example, about 30 m). The display control unit 73 starts displaying the approach notification content CTan at the timing when the remaining distance becomes less than the approach distance (see the lower part of FIG. 39). The approach notification content CTan is displayed as the related content CTr in the parking space guidance, and notifies the approach of the parking space PkS. The display control unit 73 displays an animation of raising the parking icon Ppi in a posture perpendicular to the road surface as the approach notification content CTan.

The display control unit 73 tones down each image of the parking guidance content CTpn excluding the parking icon Ppi and the speedometer CTv in accordance with the display start of the approach notification content CTan. The display control unit 73 hides each image of the parking guidance content CTpn and the speedometer CTv by tone-down, and displays only the parking icon Ppi (see FIG. 40). The parking icon Ppi emits a strong light once and then disappears toward the parking space PkS.

After hiding the parking icon Ppi, the display control unit 73 starts moving the angle of view VA from the normal position VP1 to the superimposed position VP2. The display control unit 73 starts displaying the parking guidance content CTps after completing the movement of the angle of view VA to the superimposed position VP2 (see the upper part of FIG. 41). The parking guidance content CTps are specific content CTis in the parking space guidance, and are superimposed content CTs whose object of superimposition is the front road surface.

The parking guidance content CTps includes a parking icon Ppi and direction guidance images Ppd1 and Ppd2. The parking icon Ppi fades into the angle of view VA from the direction of the parking space PkS and is redisplayed in the angle of view VA. The parking icon Ppi is displayed on the side where the parking space PkS exists in the vicinity of both the left and right edges in the angle of view VA. The parking icon Ppi is displayed in the form of a signboard standing against the ground.

The direction guidance image Ppd1 is arranged so as to line up with the parking icon Ppi in the left-right direction, and is displayed substantially in the center of the angle of view VA. The direction guidance image Ppd1 includes a plurality of (three) triangular image portions indicating the direction of the parking icon Ppi. The direction guidance image Ppd1 starts to be displayed together with the parking icon Ppi, and moves downward in the angle of view VA together with the parking icon Ppi in accordance with the approach of the parking space PkS.

The direction guidance image Ppd2 is started to be displayed at the timing when a part of the parking space PkS enters the angle of view VA (see the lower part of FIG. 41). The direction guide image Ppd2 is displayed on the upper side of the direction guide image Ppd1 so as to be perceived behind the direction guide image Ppd1. Like the direction guide image Ppd1, the direction guide image Ppd2 includes a plurality of (three) triangular image portions and points in the direction of the parking space PkS.

The display control unit 73 moves the direction guidance image Ppd2 downward according to the traveling of the vehicle A. As a result, each image portion of the direction guide image Ppd2 collides with each image portion of the direction guide image Ppd1 in order (see the upper part of FIG. 42). The direction guide images Ppd1 and Ppd2 emit light and disappear in order from the image portions that collide with each other, and are hidden. As a result, only the parking icon Ppi is displayed as the parking guidance content CTps.

The display control unit 73 starts moving the angle of view VA from the superimposed position VP2 to the normal position VP1 while continuing to display the parking guidance content CTps (specific content Ctis). The display control unit 73 moves the angle of view VA downward in accordance with the traveling of the vehicle A, in other words, in accordance with the approach of the parking space PkS in the appearance of the driver. As a result, the parking icon Ppi continues to be superimposed in the vicinity of the parking space PkS. The display control unit 73 changes the parking icon Ppi to a state of being buried in the ground at the timing when the vehicle A enters the parking space PkS (see the lower part of FIG. 42), and the driver indicates that the vehicle A has arrived at the destination parking space PkS. Notify to. The display control unit 73 hides the parking icon Ppi at the timing when the parking space PkS is outside the angle of view VA after the vehicle A arrives at the parking space PkS. With the above, the parking space guidance is completed.

<Narrow road driving support display>
The narrow road traveling support display shown in FIGS. 43 to 46 is implemented in a narrow road traveling scene in which the vehicle A travels on a narrow road, and assists the driver's steering operation. The narrow road is a traveling space PaS (see FIG. 43) slightly wider than the full width of the vehicle A. The narrow road may be a narrow road, or may be a travelable area generated between a vehicle parked on the road and a shoulder. The driving support ECU 23 diagnoses whether or not the traveling space PaS in front of the own vehicle corresponds to a narrow road based on the detection information of the camera ECU 21 or the radar ECU 24. When the driving support ECU 23 diagnoses that the front of the vehicle is a narrow road, the driving support ECU 23 decides to implement the narrow road driving support display and requests the head-up ECU 70, the meter ECU 32, and the like to start the narrow road driving support display.

The road width of the traveling space PaS for diagnosing a narrow road may be automatically changed according to the driving skill of the driver. The driving support ECU 23 narrows the road width for determining the implementation of the narrow road driving support display as the driver has a higher driving skill. In addition, the driving support ECU 23 may decide to implement the narrow road driving support display based on the user operation input by the driver. Further, the driving support ECU 23 displays a narrow road driving support display when the road width in front of the own vehicle is about the same as or narrower than the vehicle width of the own vehicle, that is, when it is diagnosed that the passage of the own vehicle is practically impossible. Do not carry out.

The display control unit 73 starts the display of the guidance content CTGp triggered by the acquisition of the execution request of the narrow road driving support display by the information acquisition unit 71. The guidance content CTGp is a related content CTr in the narrow road driving support display. The display control unit 73 displays the narrow road notification image Pnn and the narrow road enhanced image Pen in order as the guided content CTGp.

The narrow road notification image Pnn is displayed as the first related content CTr1 in the angle of view VA of the normal position VP1 in the same arrangement as the speedometer CTv (see FIG. 43). The narrow road notification image Pnn is a non-superimposed content CTn in which the display shape and the display position in the angle of view VA are predetermined. The narrow road notification image Pnn notifies the driver that a narrow road exists in front of the own vehicle, and indicates to the driver that the vehicle A can pass through the narrow road in front of the vehicle.

Before starting the movement of the angle of view VA at time t1 (see FIG. 4), the display control unit 73 hides the narrow road notification image Pnn and the speedometer CTv, and then displays the narrow road enhanced image Pen. (Ii) Display as related content CTr2 (see the upper part of FIG. 44). The narrow road enhancement image Pen is a related content CTr having a mode different from that of the narrow road notification image Pnn. The display control unit 73 starts displaying the narrow road enhanced image Pen before the movement of the angle of view VA from the normal position VP1 to the superimposition position VP2 is started, and after the movement of the angle of view VA to the superimposition position VP2 is completed. Continue to display the narrow road enhanced image Pen until.

The display control unit 73 displays a horizontally long narrow road-enhanced image Pen extending in the left-right direction while being in contact with the lower edge in the angle of view VA while the angle of view VA is at the normal position VP1 (see the upper part of FIG. 44). .. The narrow road emphasis image Pen is the superimposed content CTs superimposed on the road surface in front of the own vehicle. The length of the narrow road enhanced image Pen in the left-right direction is adjusted according to the road width of the traveling space PaS in front of the own vehicle.

The display control unit 73 enlarges the narrow road-enhanced image Pen in the vertical direction in accordance with the movement of the angle of view VA in the upward direction (movement period TM1, see FIG. 4) (see the middle part of FIG. 44). As a result, the narrow road emphasis image Pen is drawn in a trapezoidal shape with an inclined posture toward the back when viewed from the driver, and is displayed as if it is attached to the front road surface. The narrow road enhanced image Pen guides the driver's line of sight to the traveling space PaS by moving toward the traveling space PaS in the foreground as the guidance content CTGp. The narrow road enhanced image Pen is superimposed on the traveling space PaS at the time t2 (see FIG. 4) when the movement of the angle of view VA to the superimposed position VP2 is completed, and is in a state of covering the entire traveling space PaS (see FIG. 4). See the lower part of FIG. 44).

After completing the movement of the angle of view VA to the superimposed position VP2, the display control unit 73 ends the display of the narrow road enhanced image Pen (guided content CTGp) and starts the display of the narrow road driving support content CTnr ( See the upper part of FIG. 45). The narrow road traveling support content CTnr is a specific content CTis in the narrow road traveling support display, and is superimposed content CTs in which the traveling space PaS is the object of superimposition like the narrow road enhanced image Pen. The display control unit 73 displays the left boundary image Pnl and the right boundary image Pnr as the narrow road traveling support content CTnr in the angle of view VA at the superimposed position VP2.

The left boundary image Pnl is a linear image superimposed on the left boundary of the traveling space PaS. The right boundary image Pnr is a linear image superimposed on the right boundary of the traveling space PaS. The left boundary image Pnl and the right boundary image Pnr indicate to the driver the road surface range that becomes the traveling space PaS. The display control unit 73 has the left boundary image Pnl and the left boundary image Pnl according to the width of the lateral distance secured between each boundary of the traveling space PaS and the vehicle A, assuming that the own vehicle goes straight as it is. The display color of the right boundary image Pnr is changed. Specifically, when the distance between the boundary and the vehicle A is secured, the display control unit 73 displays the left boundary image Pnl and the right boundary image Pnr in white, blue, or the like. On the other hand, when the distance between the boundary and the vehicle A is not sufficient and falls below a certain value, the display control unit 73 displays the left boundary image Pnl and the right boundary image Pnr in yellow or amber.

When the vehicle A approaches the traveling space PaS, the display control unit 73 starts moving the angle of view VA from the superimposed position VP2 to the normal position VP1 while continuing to display the narrow road traveling support content CTnr (specific content Ctis). do. The display control unit 73 moves the angle of view VA downward in accordance with the traveling of the vehicle A, in other words, in accordance with the approach of the traveling space PaS in the appearance of the driver. The display control unit 73 adds the own vehicle position image Pmf to the narrow road traveling support content CTnr while the angle of view VA is moving downward (movement period TM2, see FIG. 4) (see the lower part of FIG. 45).

The own vehicle position image Pmf is an image showing the future position of the vehicle A. The own vehicle position image Pmf has a horizontally long shape reminiscent of the front bumper of the vehicle A, and is displayed in the vicinity of the lower edge in the angle of view VA with a display width corresponding to the vehicle width of the own vehicle. The vehicle position image Pmf is displayed between the left boundary image Pnl and the right boundary image Pnr to visualize and show the ratio between the width of the traveling space PaS and the width of the vehicle. The vehicle position image Pmf moves left and right between the left boundary image Pnl and the right boundary image Pnr according to the steering operation of the driver. When the traveling position of the vehicle A is too close to the left side of the traveling space PaS, the left end portion of the own vehicle position image Pmf and the left boundary image Pnl change to a warning color, so that the driver is prompted to steer to the right. Is done. On the other hand, when the traveling position of the vehicle A is too close to the right side of the traveling space PaS, the right end portion of the own vehicle position image Pmf and the right boundary image Pnr change to a warning color, so that the steering operation to the left is performed by the driver. Prompted by. Due to the above display change, the narrow road driving support content CTnr assists the driver in narrow road driving.

The display control unit 73 continues to display the narrow road driving support content CTnr even after the time t4 (see FIG. 4) when the movement of the angle of view VA to the normal position VP1 is completed (see FIG. 46). As a result, even during the period in which the vehicle A travels in the traveling space PaS, the narrow road traveling support content CTnr continues to support the narrow road traveling. The display control unit 73 hides the narrow road traveling support content CTnr at the timing when the vehicle A passes through the traveling space PaS and the traveling space PaS is outside the angle of view VA in terms of the driver's appearance. With the above, the narrow road driving support display is completed.

<Visibility support display>
The visibility support display shown in FIGS. 47 to 50 is implemented in an environment of poor visibility such as fog or heavy rain, and supports the traveling of the curve section CuS (see FIG. 49) existing in front of the vehicle A. The driving support ECU 23 determines the poor visibility in front of the own vehicle based on the detection information of the camera ECU 21. When the driving support ECU 23 determines that the front of the vehicle has poor visibility, whether or not the traveling speed of the vehicle A exceeds the threshold value (for example, 30 km / h) and whether or not the curve section CuS exists in front of the vehicle. The car is further determined. Information (map data) indicating the road shape in front of the own vehicle may be acquired from the vehicle-mounted network through the in-vehicle communication device 25, or may be acquired from the navigation ECU 22. When the vehicle A traveling at a speed exceeding the threshold value approaches the curve section CuS in an environment of poor visibility, the driving support ECU 23 decides to implement the visibility support display and starts the visibility support display by the head-up ECU 70 and the meter ECU 32. And so on. When the driving support ECU 23 diagnoses that a certain distance can be seen based on the detection information of the camera ECU 21, it notifies the head-up ECU 70, the meter ECU 32, and the like of the end of the field of view support display.

The display control unit 73 starts displaying the curve notification image Pnc when the information acquisition unit 71 acquires an execution request for the visual field support display (see FIG. 47). The curve notification image Pnc is a non-superimposed content CTn displayed near the lower edge of the angle of view VA in a layout arranged horizontally with the speedometer CTv. The curve notification image Pnc is displayed as the related content CTr in the visual field support display. The curve notification image Pnc is displayed as a virtual image in a warning color such as yellow. The curve notification image Pnc alerts the driver that the curve section CuS having a large curvature is approaching in front of the vehicle. The curve notification image Pnc is an image mainly composed of curved or bent arrows so as to remind us of a curve.

The display control unit 73 displays the line-of-sight guidance image Pgg in the central portion of the angle of view VA instead of the speedometer CTv before starting the movement of the angle of view VA at time t1 (see FIG. 4) (FIG. 48). See top row). The line-of-sight guidance image Pgg is an image including a plurality of light emitting spots. The plurality of light emitting spots are displayed as virtual images, for example, in white or blue. The light emitting spots are displayed so as to be arranged substantially in a straight line along the own lane in which the vehicle is traveling, while being spaced from each other. The line-of-sight guidance image Pgg may be non-superimposed content CTn whose display position in the angle of view VA is preset, or may be superimposed content CTs whose arranging direction changes according to the road shape in front of the vehicle. ..

The display control unit 73 uses the curve notification image Pnc and the line-of-sight guidance image Pgg as the guidance content CTGf. The guidance content CTGf is a display object for directing the driver's line of sight to a distance by moving toward the vanishing point in the foreground while the angle of view VA is moving (movement period TM1, see FIG. 4). The guidance content CTGf guides the driver's attention to the front range where the curve section CuS exists.

The display control unit 73 reduces the display size of the curve notification image Pnc in accordance with the upward movement of the angle of view VA. The display control unit 73 ends the display of the curve notification image Pnc during the movement period TM1 (see FIG. 4) of the angle of view VA (see the lower part of FIG. 48). As described above, the curve notification image Pnc moves toward the vanishing point in the foreground and is displayed so as to disappear.

The display control unit 73 increases the number of light emitting spots of the line-of-sight guidance image Pgg in accordance with the upward movement of the angle of view VA. The display control unit 73 reduces the display size as the light emitting spot is displayed upward. The display control unit 73 continues to display the line-of-sight guidance image Pgg even after the curve notification image Pnc is hidden (see the lower part of FIG. 48), and guides the driver's attention to a distance.

The display control unit 73 continues to display the line-of-sight guidance image Pgg until the movement of the angle of view VA to the superimposed position VP2 is completed at time t2 (see FIG. 4). The display control unit 73 starts displaying the curve guidance content CTcs by an animation display that divides a plurality of light emitting spots of the line-of-sight guidance image Pgg to the left and right (see the upper part of FIG. 49). The curve guidance content CTcs are specific content CTis in the visual field support display. The curve guidance contents CTcs are superposed content CTs that target the road surface of the own lane in the foreground as an object of superimposition, and by superimposing on the road surface, the driver is shown the shape of the road ahead.

The curve guidance content CTcs are superimposed content CTs including the curve shape image Pcs and the oncoming vehicle notification image Poc. The curve shape image Pcs is an image composed of a plurality of light emitting spots divided into left and right. The curve shape image Pcs has two rows of light emitting spots on the left and right arranged along the road surface ahead, and guides the driver to the road shape in front of the vehicle. The oncoming vehicle notification image Poc is displayed when the oncoming vehicle Ao (see FIG. 49) traveling in the oncoming lane is detected by the driving support ECU 23. The oncoming vehicle notification image Poc is an image that alerts the driver to the presence of an oncoming vehicle Ao approaching from the front, and is displayed as a virtual image in a warning color such as yellow. The oncoming vehicle notification image Poc is displayed on the oncoming lane side with respect to the curve shape image Pcs. The oncoming vehicle notification image Poc has a plurality of V-shaped image portions that are visually recognized in a posture perpendicular to the road surface ahead, and prevents the vehicle from deviating to the oncoming lane. The display of the oncoming vehicle notification image Poc is terminated when the oncoming vehicle Ao passes by the side of the vehicle A (see the upper part of FIG. 50).

The display control unit 73 ends the display of the curve guidance content CTcs so as not to interfere with the actual visibility of the foreground, triggered by the acquisition of the end notification of the view support display by the information acquisition unit 71. The display control unit 73 displays the angle of view VA of the two rows of light emitting spots displayed as the curve shape image Pcs before the time t3 (see FIG. 4) when the movement of the angle of view VA to the normal position VP1 is started. Move it to the center (see the middle of FIG. 50). The display control unit 73 combines the left and right light emitting spots to display one row, and then starts moving the angle of view VA to the normal position VP1. As each light emitting spot moves out of the angle of view VA as the angle of view VA moves downward, the field of view support display ends (see the lower part of FIG. 50).

Also in the third embodiment described so far, the same effect as that of the first embodiment is obtained, and the time lag until the display start due to the angle of view movement is less likely to be perceived by the driver by the display of the related content CTr. Therefore, even if the angle of view VA capable of displaying a virtual image is expanded, the discomfort of the display is reduced, and the convenience of the HUD 100 can be enhanced.

In addition, in the third embodiment, when the target warning content CTta that warns the risk target Tr in front of the own vehicle is displayed as the specific content Ctis, the guidance content CTGt that moves toward the risk target Tr is the related content CTr. Is displayed as. Such guided content CTGt can direct the driver's attention to the risk target Tr or its vicinity at an early stage. As a result, the driver can easily recognize the risk target Tr and can smoothly respond to the risk target Tr. Therefore, a highly convenient virtual image display is realized.

Further, in the third embodiment, when the parking guidance content CTps that guides the parking space PkS in front of the own vehicle is displayed as the specific content Ctis, the approach notification content CTan that notifies the approach of the parking space PkS is displayed as the related content CTr. To. Such approach notification content CTan can prompt the driver to perform a driving operation such as deceleration for parking in the parking space PkS. As a result, the driver can smoothly start the driving operation of parking the vehicle A in the parking space PkS according to the parking guidance content CTps.

Further, in the third embodiment, when the narrow road driving support content CTnr that supports the traveling of the traveling space PaS is displayed as the specific content Ctis, the guidance content CTGp that moves toward the traveling space PaS is displayed as the related content CTr. .. Such guided content CTGp can direct the driver's attention to the traveling space PaS which is a narrow road at an early stage. As a result, the driver can smoothly enter the vehicle A into the traveling space PaS and quickly pass through the narrow road in combination with the traveling support by the narrow road traveling support content CTnr in the narrow road.

In addition, in the third embodiment, when the curve guidance content CTcs indicating the road shape in front of the vehicle is displayed as the specific content Ctis, the guidance content CTGf that moves toward the vanishing point in the foreground is displayed as the related content CTr. To. Such guided content CTGf can direct the driver's attention to a greater distance and urge the driver to take action in preparation for the next curve section CuS. As a result, even in a scene with poor visibility, for example, the driver can perform appropriate deceleration before entering the curve section CuS, and can continue smooth running according to the curve guidance content CTcs in the curve section CuS.

In the third embodiment, the guidance content CTGt corresponds to the "target guidance content", and the guidance content CTGp corresponds to the "narrow road guidance content". Further, the curve guidance content CTcs corresponds to the "shape guidance content", and the guidance content CTGp corresponds to the "foreground guidance content".

(Other embodiments)
Although the plurality of embodiments according to the present disclosure have been described above, the present disclosure is not construed as being limited to the above embodiments, and is applied to various embodiments and combinations within the scope of the gist of the present disclosure. can do.

In the first modification of the above embodiment, the HUD is provided with an actuator for moving the position of the angle of view VA in the left-right direction Yo (see FIG. 1) as a switching mechanism. Specifically, in the modification 1, the left notification position and the right notification position are defined on the left and right sides of the superimposed position VP2, respectively. The head-up ECU 70 moves the angle of view position from the superimposed position VP2 to the right notification position when displaying the point notification image Ptp (see the lower part of FIG. 23), for example, in a turn-by-turn display at a right turn intersection. As an example, the head-up ECU 70 starts the movement of the angle of view position at the timing when the right turn of the own vehicle is started based on the steering operation. Similarly, in the turn-by-turn display at the left turn intersection, the head-up ECU 70 moves the angle of view VA from the superimposed position VP2 to the left notification position at the timing when the left turn is started.

As in the above modification 1, the number of angle-of-view positions that can be set in the HUD is not limited to the number exemplified in the above embodiment. In addition, each of the plurality of defined angle-of-view positions may have a positional relationship in which the boundaries are in contact with each other, a positional relationship in which they are separated from each other, or a positional relationship in which some of them overlap each other. good. Further, the moving direction of the angle of view VA is not limited to the vertical direction US, and may be the left-right direction Yo as in the first modification, or may be the front-back direction ZG. Further, the angle of view movement may be performed by combining the movements of the vertical direction US, the horizontal direction Yo, and the front-back direction ZG in a complex manner. The mechanism that enables such movement of the angle of view may be changed as appropriate.

The content displayed at each angle of view position may be appropriately changed among the superimposed content CTs and the non-superimposed content CTn. Similarly, the specific content Ctis displayed after the movement of the angle of view VA is not limited to the superimposed content CTs, and may be non-superimposed content CTn. Further, the specific content Ctis may be warning content for notifying the driver of urgent warning information, or may be notification content for notifying the driver of the status information of the non-urgent vehicle A. Further, the related content CTr may be either the superimposed content CTs or the non-superimposed content CTn.

In addition, the shape, emission color, display position, and the like of the image as each content may be changed according to the driver's preference. Further, the language and the type of the unit may be appropriately changed based on the user settings such as the driver and the settings of the country and region where the vehicle A is used.

In the second modification of the above embodiment, the related content CTr is displayed only before the start of the angle of view movement. That is, in the second modification, the display of the related content CTr in the movement period TM1 from the normal position VP1 to the superimposed position VP2 is omitted. As described above, the display period of the related content CTr may be appropriately changed within the period before the movement to the superimposed position VP2 is completed.

In the modification 3 of the above embodiment, the display change of the meter display device 30 linked with the movement of the angle of view VA by the HUD 100 is not implemented. Specifically, in the modification 3, the tone-down of the detailed information PDi in the moving period TM1 and the interruption of the display of the detailed information PDi in the display period of the specific content Ctis are not implemented.

In the fourth modification of the above embodiment, a part or all of the processing functions of the head-up ECU 70 are mounted on an integrated device such as an HCU (Human Machine Interface Control Unit). The processing functions of the meter ECU 32 may be further integrated in such an HCU. Even in the above modification 4, the HUD is a "virtual image display device".

In the modification 5 of the above embodiment, the detailed information PDi continues to be displayed even during the period when the angle of view VA is at the superimposed position VP2. The detailed information PDi continues to be displayed in a state where the visibility is lower than the period during which the angle of view VA is at the normal position VP1 even after the angle of view VA is moved to the superimposed position VP2. As an example, the detailed information PDi is set to a state of low brightness or saturation.

The PGU61 of the HUD100 may be provided with an EL (Electro Luminescence) panel instead of the LCD panel and the backlight. Further, instead of the EL panel, a PGU 61 using a display such as a plasma display panel, a cathode ray tube and an LED may be adopted. Further, instead of the LCD panel and the backlight, a laser projector or DLP (Digital Light Processing, registered trademark) and a screen may be provided. In the PGU 61 adopting such a configuration, the display image drawn on the screen is projected onto the windshield WS by the magnifying optical system 62 and is imaged as a virtual image Vi. In addition, the optical element adopted in the magnifying optical system 62 is not limited to the concave mirror, and various mirrors, lenses, holographic optical elements, and the like may be appropriately changed.

The processing unit provided in the head-up ECU 70 and the meter ECU 32 of the above embodiment is hardware for arithmetic processing combined with RAM. The processing unit has a configuration including at least one arithmetic core such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit). The processing unit may be configured to further include, for example, an FPGA (Field-Programmable Gate Array) and an IP core having other dedicated functions. On the other hand, the RAM may be configured to include a video RAM for video generation. The processing unit executes various processes for realizing the virtual image display method of the present disclosure by accessing the RAM. The storage is configured to include a non-volatile storage medium. Various programs (display control programs, etc.) executed by the processing unit are stored in the storages of the ECUs 32 and 70.

In the above embodiment, each function provided by the head-up ECU 70 and the meter ECU 32 can be provided by software and hardware for executing the software, hardware only, hardware only, or a combination thereof. .. Further, when such a function is provided by an electronic circuit as hardware, each function can also be provided by a digital circuit including a large number of logic circuits or an analog circuit.

Further, the form of the storage medium for storing the program or the like that can realize the above-mentioned virtual image display method may be appropriately changed. For example, the storage medium is not limited to the configuration provided on the circuit board, and may be provided in the form of a memory card or the like, inserted into the slot portion, and electrically connected to the control circuit of the HCU. .. Further, the storage medium may be an optical disk and a hard disk drive that serve as a copy base for the program to the HCU.

The controls and methods thereof described in the present disclosure may be realized by a dedicated computer constituting a processor programmed to perform one or more functions embodied by a computer program. Alternatively, the apparatus and method thereof described in the present disclosure may be realized by a dedicated hardware logic circuit. Alternatively, the apparatus and method thereof described in the present disclosure may be realized by one or more dedicated computers configured by a combination of a processor for executing a computer program and one or more hardware logic circuits. Further, the computer program may be stored in a computer-readable non-transitional tangible recording medium as an instruction executed by the computer.

A vehicle, CTis specific content, CTan approach notification content, CTcs curve guidance content (shape guidance content), CTdw deviation warning content, CTfd inter-vehicle distance notification content, CTGn, CTGs guidance content (moving content), CTGf guidance content (foreground guidance content) , CTGp guidance content (narrow road guidance content), CTGt guidance content (target guidance content), CTnr narrow road driving support content, CTps: parking guidance content, CTrg route guidance content, CTr related content, CTr1 first related content, CTr2 Second related content, CTta target warning content, CTus partial display content (part of inter-vehicle notification content), CTel lane emphasis content, PaS driving space, PkS parking space, TM1 travel period, Tr risk target, VA angle of view, VP1 normal position (first position), VP2 superimposed position (second position), Vi imaginary image, 30 meter display device (screen display device), 63 actuators (switching mechanism), 263 mirror actuators (switching mechanism), 264 unit actuators ( Switching mechanism), 73 display control unit, 100,200 HUD (imaginary image display device), 110,210 display system

Claims (16)

A virtual image display device that displays a virtual image (Vi) that can be visually recognized by the occupants of the vehicle (A).
A switching mechanism (63,263,264) for switching the position of the angle of view (VA) on which the virtual image is displayed between a plurality of positions including the first position (VP1) and the second position (VP2).
A display control unit (73) for displaying the virtual image associated with each of the first position and the second position according to the switching of the position of the angle of view by the switching mechanism is provided.
When the display control unit displays the specific content (Ctis) in the angle of view of the second position after the switching mechanism moves the angle of view from the first position to the second position. A virtual image display device that starts displaying related content (CTr) previously associated with the specific content before the movement of the angle of view to the second position is completed. The virtual image display device according to claim 1, wherein the display control unit starts displaying the related contents before the movement of the angle of view by the switching mechanism is started. Assuming that the related content displayed before the start of movement of the angle of view by the switching mechanism is the first related content (CTr1),
The virtual image according to claim 2, wherein the display control unit displays the second related content (CTr2), which is the related content in a manner different from the first related content, while the angle of view is being moved by the switching mechanism. Display device. The virtual image display device according to claim 1, wherein the display control unit starts displaying the related content while the angle of view is being moved by the switching mechanism. In the switching mechanism, the second position is defined above the first position.
The virtual image display device according to any one of claims 1 to 4, wherein the display control unit superimposes and displays the specific content on an object in the foreground. When displaying the deviation warning content (CTdw) for warning the deviation of the vehicle from the traveling lane as the specific content, the display control unit moves on the appearance of the occupant in accordance with the movement of the angle of view. The virtual image display device according to any one of claims 1 to 5, wherein the moving content (CTGn) to be displayed is displayed as the related content. When the display control unit displays the deviation warning content (CTdw) for warning the deviation of the vehicle from the traveling lane as the specific content, the display control unit is directed toward the vanishing point in the foreground while the angle of view is moving. The virtual image display device according to any one of claims 1 to 5, which displays moving moving contents (CTGs) as the related contents. When the display control unit displays the inter-vehicle distance notification content (CTfd) for notifying the operation state of the inter-vehicle distance maintenance control as the specific content, the display control unit is moving a part (CTus) of the inter-vehicle distance notification content as the related content. The virtual image display device according to any one of claims 1 to 7, which is displayed within the angle of view. When the display control unit displays the route guidance content (CTrg) superimposed on the road surface in the foreground as the specific content, the display control unit provides lane emphasis content (CTr) that emphasizes the own lane during travel. The virtual image display device according to any one of claims 1 to 8, which is displayed as the related content. When the display control unit displays the target warning content (CTta) that warns of the risk target (Tr) generated in front of the vehicle as the specific content, the display control unit is in the foreground while the angle of view is moving. The virtual image display device according to any one of claims 1 to 9, wherein the target guide content (CTGt) moving toward the risk target is displayed as the related content. When the display control unit displays the parking guidance content (CTps) that guides the parking space (PkS) in front of the vehicle as the specific content, the display control unit provides the approach notification content (CTan) that notifies the approach of the parking space. The virtual image display device according to any one of claims 1 to 10, which is displayed as the related content. The display control unit provides narrow road driving support content (CTnr) that is superimposed on the road surface in the foreground and supports driving in a traveling space (PaS) through which the vehicle can pass in a scene in which the vehicle travels on a narrow road. Any one of claims 1 to 11 for displaying narrow road guidance content (CTGp) that moves toward the traveling space in the foreground while the angle of view is moving as the specific content. The virtual image display device described in the section. When the display control unit displays the shape guidance content (CTcs) superimposed on the road surface in the foreground and showing the shape of the road ahead as the specific content, the display control unit directs the shape guidance content (CTcs) toward the vanishing point in the foreground while the angle of view is moving. The virtual image display device according to any one of claims 1 to 12, which displays the foreground guidance content (CTGf) that moves in a moving manner as the related content. The virtual image display device (100, 200) according to any one of claims 1 to 13.
A display system including a screen display device (30) that changes the display of the display screen in cooperation with the switching of the position of the angle of view by the switching mechanism. The screen display device is
During the period when the angle of view is in the first position, detailed information related to the specific content is displayed on the display screen.
14. Claim 14 that when the movement of the angle of view to the second position is completed, the visibility of the detailed information is made lower than the period during which the angle of view is in the first position, or the detailed information is hidden. The display system described in. The display system according to claim 15, wherein the screen display device performs a mode change that reduces the visibility of the detailed information during a movement period (TM1) in which the angle of view moves from the first position to the second position. ..

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