JP7351114B2 - heads up display device - Google Patents

Description

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

There is a known technology that acquires rear vehicle information indicating that a rear vehicle is behind the own vehicle, determines the degree of caution of the rear vehicle based on the rear vehicle information, and displays an image representing the determined degree of caution. (For example, see Patent Document 1).

Japanese Patent Application Publication No. 2017-138796

By the way, unlike images that can be displayed on a display device such as a liquid crystal display placed in an instrument panel, the images that can be displayed on a head-up display device have relatively large restrictions on size, and it is difficult to output detailed displays. difficult. Therefore, information representing an attention-seeking object on the side of the own vehicle is output in a manner that allows the driver to know at a glance which side of the vehicle, in the left or right direction, the attention-seeking object is detected. difficult to do.

Therefore, the present disclosure provides information representing an attention-seeking object on the side of the own vehicle in a manner that allows the driver to know at a glance on which side of the own vehicle, in the left-right direction, the attention-seeking object is detected. The purpose is to output.

In one aspect, information representing an attention-seeking object on the side of the vehicle is output as a first image including a steering wheel image representing a steering wheel and a hand image representing a hand gripping the steering wheel;
The first image further includes a predetermined image representing the attention-seeking object on the right side of the steering wheel image when the attention-seeking object is detected on the right side of the own vehicle; If detected on the left side, further including the predetermined image on the left side of the steering wheel image,
During the driving support control, information indicating that the driving support control is being performed is output as a second image,
switching from the second image to the first image when the attention-seeking object is detected during driving support control;
The second image includes a vehicle image representing the outer shape of the vehicle,
The first image does not include a vehicle image representing the outer shape of the vehicle,
The horizontal center position of the steering wheel image when the first image is output and the horizontal center position of the vehicle image of the second image when the second image is output are the same. A head-up display device is provided .

According to the present disclosure, information representing an attention-seeking object on the side of the own vehicle is provided in a manner that allows the driver to know at a glance on which side of the own vehicle, in the left-right direction, the attention-seeking object is detected. It becomes possible to output.

FIG. 1 is a perspective view showing the internal configuration of a head-up display according to an embodiment from above. FIG. 2 is a diagram schematically showing a state in which a head-up display is mounted on a vehicle, as viewed from the side of the vehicle. FIG. 2 is a diagram illustrating an example of a hardware configuration of a control device for a head-up display. FIG. 3 is a diagram illustrating an example of a display image (virtual image display) related to an attention-calling image. FIG. 7 is an explanatory diagram of a display image (virtual image display) according to a comparative example. FIG. 7 is a diagram showing another example of a display image (virtual image display) related to an attention-calling image. FIG. 7 is a diagram showing another example of a display image (virtual image display) related to an attention-calling image. FIG. 7 is a diagram showing another example of a display image (virtual image display) related to an attention-calling image. 2 is a flowchart illustrating an example of processing related to an attention-calling object display function of the control device. It is a figure which shows the transition aspect of the display image (virtual image display) VI during driving support control.

Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings. Note that in FIG. 1 and the like, for ease of viewing, only some of the parts with the same attribute may be labeled with reference numerals.

[Heads-up display configuration]
FIG. 1 is a perspective view showing the internal configuration of a head-up display 1 according to an embodiment from above. FIG. 2 is a diagram schematically showing a vehicle-mounted state of the head-up display 1 as viewed from the side of the vehicle. Note that in FIG. 1, illustration of some components of the head-up display 1 is omitted. In FIG. 1, three mutually orthogonal directions, namely, an X direction, a Y direction, and a Z direction, are defined in a right-handed system. In the following, the Z direction will be referred to as the vertical direction, the positive side will be referred to as the upper side, and the negative side will be referred to as the lower side.

The head-up display 1 is mounted within an instrument panel 9 of a vehicle. The head-up display 1 may be mounted with the Y direction in FIG. 1 substantially corresponding to the vehicle width direction.

The head-up display 1 includes a case 2, a TFT (Thin Film Transistor) panel unit 3, mirrors 4 and 5, and a backlight unit 6.

Case 2 forms a housing of head-up display 1. The case 2 is a lower case that forms the lower part of the housing of the head-up display 1. Note that the case 2 is coupled to an upper case, which is not shown in FIG.

The case 2 is made of a material with high heat conductivity such as aluminum. Case 2 includes a heat radiation portion 21, as shown in FIG. The heat radiation portion 21 is formed on the outer surface of the case 2 (the surface exposed to the outside). The heat radiation portion 21 has a function of radiating heat generated from the backlight unit 6. The heat radiation portion 21 radiates heat to the air flowing outside the case 2.

The TFT panel unit 3 is a display device that uses light from the backlight unit 6 as a backlight and emits image light according to a displayed image. The TFT panel unit 3 has a color filter (not shown). Note that the display image may be an image representing navigation information, various vehicle information, etc., for example. In this embodiment, as described below, the display image includes an attention-seeking image related to an attention-seeking object.

When the windshield glass WS is irradiated with image light, as shown in FIG. ) VI is visible. Thereby, the driver can visually recognize the display image VI superimposed on the scenery ahead, and can grasp vehicle information and the like with less movement of his/her line of sight, improving convenience and safety.

In addition, although the head-up display 1 of a specific structure is shown above, this Example is applicable to the head-up display of arbitrary structure. For example, in the above description, mirrors 4 and 5 are provided, but one or both of mirrors 4 and 5 may be omitted.

[Caution-calling object display function]
Next, a function (hereinafter also referred to as "attention-calling object display function") of outputting an attention-drawing display image (virtual image display) VI (see FIG. 2) related to an attention-calling object on the head-up display 1 will be explained. Hereinafter, the own vehicle refers to a vehicle equipped with the head-up display 1.

FIG. 3 is a diagram showing an example of the hardware configuration of the control device 10 of the head-up display 1. In FIG. 3, peripheral devices 60 are schematically illustrated in association with the hardware configuration of the control device 10. Note that part or all of the configuration of the control device 10 may be housed within the case 2.

The peripheral devices 60 may include other in-vehicle electronic devices in addition to the TFT panel unit 3 and the backlight unit 6. In this embodiment, the peripheral equipment 60 includes a surroundings monitoring ECU (Electronic Control Unit) 62 that monitors the surroundings of the own vehicle, a side radar sensor 64, and a driving support ECU 66.

A side radar sensor 64 is connected to the surrounding area monitoring ECU 62 . The side radar sensors 64 are mounted on the left and right sides of the own vehicle, and detect obstacles on the left and right sides of the own vehicle. The surroundings monitoring ECU 62 detects an attention-seeking object on the side of the own vehicle based on sensor information from the side radar sensor 64. The attention-getting object is an obstacle that is useful for alerting the driver of the own vehicle, and may be an object that satisfies predetermined attention-getting conditions. The predetermined attention-calling condition is arbitrary, but may be satisfied, for example, when the following condition elements (1) and (2) are satisfied.
Conditional element (1) A moving object exists in the first attention-calling area on the side of the host vehicle.
Conditional element (2) There is a possibility that a moving object within the first attention-calling area will enter in front of the own vehicle (on the lane in which the own vehicle is traveling) (that is, there is a possibility that it will cut into a relatively short distance in front of the own vehicle).
The first attention-calling area may be defined in such a manner as to cover an area that is likely to become a blind spot for the driver. For example, the first attention-seeking area may include the sides and rear of the own vehicle. In this case, the presence of a moving object entering the driving lane of the own vehicle from an adjacent lane can be notified to the driver as an attention-getting object. Note that the following conditional element (12) and conditional element (13) may be used instead of conditional element (2).
Conditional element (12) The vehicle is planning to change lanes.
Conditional element (13) A moving object exists within the second caution area in the lane to which the lane is to be changed.
The second attention-calling area may be an area within a range where the distance to the moving object becomes too short if a lane change is realized. The second attention-calling area may be varied according to the speed of the moving object (speed difference with the own vehicle). The condition element (12) may be determined based on the state of the turn signal lever switch, for example. In this case, it is possible to notify the driver of the presence of a moving object that is highly useful for alerting the driver on the lane to which the driver is changing lanes when changing lanes, as an alerting object.

The surrounding area monitoring ECU 62 may use another sensor (for example, an image sensor) in place of or in addition to the side radar sensor 64 to detect an attention-seeking object on the side of the vehicle.

The driving support ECU 66 executes driving support control based on sensor information from various in-vehicle sensors (not shown) such as a radar sensor, image sensor, LiDAR, wheel speed sensor, steering sensor, etc. do. Driving support control includes preceding vehicle following control that controls the driving state (vehicle speed, etc.) of the own vehicle in a manner to follow the preceding vehicle based on sensor information from a radar sensor, etc., and lane control based on images captured by an image sensor. It may include steering support control that controls the steering state of the own vehicle based on the recognition result. In this embodiment, the steering support control is a control that generates a reaction force or vibration on the steering wheel 8 (see FIG. 2) to prevent the driver from deviating from the driving lane, and is an automatic control that automatically realizes a lane change. Does not include steering control. However, the vehicle may have a mode in which automatic steering control is executed, and in this case, the attention-calling object display function is realized in a mode other than the mode in which automatic steering control is executed.

The control device 10 realizes an attention-calling object display function. In the example shown in FIG. 3, the control device 10 includes a CPU (Central Processing Unit) 11, a RAM (Random Access Memory) 12, a ROM (Read Only Memory) 13, an auxiliary storage device 14, and a drive device 15, which are connected via a bus 19. , a communication interface 17 , and a wired transmitter/receiver 25 and a wireless transmitter/receiver 26 connected to the communication interface 17 .

The auxiliary storage device 14 is, for example, a HDD (Hard Disk Drive) or an SSD (Solid State Drive), and is a storage device that stores data related to application software and the like.
The wired transmitter/receiver 25 includes a transmitter/receiver that can communicate using a wired network compliant with CAN (controller area network) or the like. A peripheral device 60 is connected to the wired transmitter/receiver 25 . However, some or all of the peripheral devices 60 may be connected to the bus 19 or may be connected to the wireless transmitter/receiver 26.

The wireless transmitter/receiver 26 is a transmitter/receiver that can communicate using a wireless network. The wireless network may include a mobile phone wireless communication network, the Internet, a VPN (Virtual Private Network), a WAN (Wide Area Network), and the like. Further, the wireless transmitting/receiving section 26 may include a near field communication (NFC) section, a Bluetooth (registered trademark) communication section, a Wi-Fi (Wireless-Fidelity) transmitting/receiving section, an infrared transmitting/receiving section, etc. .

Note that the control device 10 may be connectable to the recording medium 16. The recording medium 16 stores a predetermined program. The program stored in this recording medium 16 is installed in the auxiliary storage device 14 or the like of the control device 10 via the drive device 15. The installed predetermined program can be executed by the CPU 11 of the control device 10. For example, the recording medium 16 may be a recording medium that records information optically, electrically, or magnetically, such as a CD (Compact Disc)-ROM, a flexible disk, or a magneto-optical disk, or a recording medium that records information optically, electrically, or magnetically, such as a ROM, or a flash memory. It may be a semiconductor memory or the like that electrically records information.

In this embodiment, when an attention-getting object is detected by the surrounding monitoring ECU 62, the control device 10 displays an attention-getting image (hereinafter also referred to as "attention-raising image") related to the attention-getting object (a first image). example) is outputted via the TFT panel unit 3. In the following, display images output by the TFT panel unit 3, such as an attention-calling image and a driving support image to be described later, will be explained in the form of a display image (virtual image display) VI. Therefore, in the following explanation, "left and right" and "up and down" correspond to directions from the driver's line of sight when viewing the display image (virtual image display) VI.

FIG. 4 is a diagram showing an example of a display image (virtual image display) VI related to an attention-calling image. FIG. 4 is a diagram showing the display image VI from the driver's perspective, and also shows scenery other than the display image VI (for example, an actual scenery such as a white line on the road). This also applies to similar drawings that will be described later.

In FIG. 4, the attention-seeking image G40 includes a steering wheel image G41 representing the steering wheel 8, a hand image G42 representing a hand gripping the steering wheel 8, and a predetermined image G43 representing an attention-seeking object.

The steering wheel image G41 and the hand image G42 are drawn in a manner that indicates the state of the driver of the own vehicle. In other words, the driver of the own vehicle who views the steering wheel image G41 and the hand image G42 feels as if the hand image G42 is his own hand, and the steering wheel image G41 is his own hand. A wheel image G41 and a hand image G42 can be seen. In other words, the steering wheel image G41 and the hand image G42 have a function of schematically suggesting the driver's own driving position (hereinafter referred to as "driving position suggestion") ahead of the driver (forward of the windshield glass WS). function).

The display positions of the steering wheel image G41 and the hand image G42 are preferably fixed from the viewpoint of enhancing the driving position suggestion function. That is, the steering wheel image G41 and the hand image G42 are preferably displayed at a constant position regardless of the display position of the predetermined image G43, in contrast to the case where the display position of the predetermined image G43 described later changes. be done. This is because the driving position (relative position with respect to the own vehicle) of the driver himself while driving is constant.

The steering wheel image G41 is preferably drawn in a color with a high degree of alertness (for example, red). Thereby, it is possible to effectively urge the driver to be highly alert using the caution image G40.

The predetermined image G43 is an image representing an attention-drawing object, and its form is arbitrary. For example, the predetermined image G43 may be an image imitating an attention-drawing object. In this embodiment, as an example, as shown in FIG. 4, the predetermined image G43 is an image imitating the tip of an arrow pointing forward, and has three arrow tips. Note that the color and/or brightness of the predetermined image G43 may be changed in a manner that shows a flow from the rear to the front. In this case, the manner in which the attention-seeking object moves from the rear to the front (the manner in which it moves relative to the own vehicle) can be clearly communicated to the driver.

In the predetermined image G43, the display position relative to the steering wheel image G41 (and the accompanying hand image G42) represents the location of the attention-drawing object. Specifically, when the predetermined image G43 is displayed on the left side of the steering wheel image G41 (see FIG. 4), it indicates that an attention-getting object has been detected on the left side of the host vehicle, and the predetermined image G43 is displayed on the left side of the steering wheel image G41. If it is displayed on the right side of , it means that an attention-seeking object has been detected on the right side of your vehicle.

The output mode (color, blinking cycle, etc.) of the predetermined image G43 may be varied depending on the degree of attention-seeking. For example, the predetermined image G43 may be output in red if the degree of alerting is relatively high. Further, the predetermined image G43 may be output in a manner similar to the vehicle information (vehicle information NT representing the degree of caution of the vehicle behind) (see FIG. 5) described in, for example, Japanese Patent Application Publication No. 2017-138796.

In addition, in FIG. 4, the display image output by the TFT panel unit 3 includes a driving support image G50 representing driving support information in addition to the attention-calling image G40. Although the driving support information is arbitrary, for example, as shown in FIG. 4, it may represent the traveling speed of the own vehicle, the speed limit of the road on which the vehicle is traveling, and the like. In this way, the attention-seeking image G40 may be output together with other images. In addition, in the modified example, the display image output by the TFT panel unit 3 may not include the driving support information and may include only the attention-calling image G40, or may not include the driving support information and may include the attention-calling image G40 and other May include images.

The driving support image G50 is arbitrary as described above, but preferably does not include an image imitating the own vehicle or the preceding vehicle (see image CA2 in FIG. 5). This is because if an image imitating the own vehicle or a preceding vehicle is placed near the attention-calling image G40, the driving position suggestion function by the steering wheel image G41 and the hand image G42 is likely to deteriorate. In other words, this is because the driver is likely to become confused and grasp the position of the predetermined image G43 (the location of the attention-calling object) based on the image simulating the own vehicle or the preceding vehicle.

Next, the effects of this example will be explained with reference to the comparative example shown in FIG.

FIG. 5 is an explanatory diagram of a display image (virtual image display) VI according to a comparative example. In the comparative example, the caution image includes an image of vehicle information NT representing the degree of caution of the vehicle behind, an image CA2 simulating a preceding vehicle, and images WR1 and WR2 representing lanes. In this case, the image of the vehicle information NT has the same function as the predetermined image G43 of the present embodiment, and may itself be output in the same manner as the predetermined image G43 of the present embodiment.

By the way, unlike images that can be displayed on a display device such as a liquid crystal display disposed on an instrument panel, the images that can be displayed on the head-up display 1 have relatively large size restrictions, and it is difficult to output detailed displays. difficult. Therefore, if the center position of each display has a meaning, it is difficult for the driver to grasp the center position. Therefore, in the case of information with a relatively high degree of urgency, it is useful to output the information so that the driver can instantly understand the meaning of the information. Specifically, for information indicating an attention-seeking object on the side of the own vehicle, the driver may be able to see at a glance on which side of the own vehicle the attention-seeking object is detected in the left or right direction. It would be useful to output this.

In this regard, in the comparative example, the driver can check which side of the images WR1 and WR2 representing the lanes the image of the vehicle information NT representing the degree of caution of the vehicle behind is displayed, and thereby detect the caution-stimulating object. It is possible to determine which side of the vehicle is detected in the left-right direction relative to the own vehicle. However, although images WR1 and WR2 representing lanes can be determined to be the lane in which the preceding vehicle is traveling due to their positional relationship with image CA2, it may not be possible to instantly determine whether or not they are in the lane in which the own vehicle is traveling. . This is because a vehicle image (vehicle icon) like image CA2 is often displayed even during driving support control (leading vehicle following control such as ACC (Adaptive Cruise Control)), and such a vehicle image is This is because it can easily lead to confusion as to whether it represents a vehicle.

In this way, in the case of the comparative example, the driver can see at a glance the information representing the attention-seeking object on the side of the own vehicle, and which side of the own vehicle in the left or right direction the attention-seeking object is detected. In this manner, there is room for improvement from the viewpoint of output.

In this regard, according to the present embodiment, as described above, the driving position suggestion function using the steering wheel image G41 and the hand image G42 makes it easier to understand the position of the predetermined image G43 (that is, the position of the attention-drawing object). That is, the driving position suggestion function using the steering wheel image G41 and the hand image G42 makes the driver's own virtual position clear, so the driver can determine the position of the predetermined image G43 with respect to the steering wheel image G41 and the hand image G42. , it becomes easier to intuitively understand the location of the attention-drawing object relative to the driver's own vehicle (or the driver himself). In this way, according to the present embodiment, the driver can check at a glance on which side of the vehicle, in the left or right direction, the caution object is detected, by viewing information representing the caution object on the side of the vehicle. It can be output in such a way that it can be understood.

Further, according to this embodiment, the driving position suggestion function is realized by the steering wheel image G41 and the hand image G42, so the driving position suggestion function is realized by the steering wheel image G41 only, for example. The position suggestion function can be enhanced. Specifically, in a configuration in which only the steering wheel image G41 is displayed instead of the steering wheel image G41 and the hand image G42, the steering wheel image G41 is an image displayed during driving support control (for example, an image displayed during steering support control). There is a risk of confusion with a similar displayed steering wheel image (see vehicle image G1002 of control information image G1001 in FIG. 10). On the other hand, according to the present embodiment, by adding the hand image G42 representing the hand gripping the steering wheel 8, the driver can easily imagine that he or she is gripping the steering wheel 8. (accompanying this, not only can the driving position suggestion function be improved), but also it is possible to suppress confusion with a similar steering wheel image displayed during steering assist control.

In this manner, according to the present embodiment, the attention-calling image G40 can be output in a manner that does not cause confusion with various images displayed during driving support control. This makes it easier for the driver to instantly grasp necessary information (i.e., the presence of an attention object and its position) from the attention image G40, and the usefulness of the output of the attention image G40 even during driving support control. can be effectively increased.

Next, variations of the display image (virtual image display) VI related to the attention-calling image will be described with reference to FIGS. 6 to 8.

In FIG. 6, the attention-seeking image G40A includes a steering wheel image G41A representing the steering wheel 8, a hand image G42A representing a hand gripping the steering wheel 8, and a predetermined image G43 representing an attention-seeking object. In FIG. 6, unlike the steering wheel image G41 and hand image G42 shown in FIG. is drawn to represent the current state. That is, the steering wheel image G41 and the hand image G42 shown in FIG. As shown in FIG. 6, the image G41A and the hand image G42A are drawn to represent a state in which the steering wheel 8 is steered in a predetermined direction by both hands of the driver from a neutral position. The predetermined direction is such that when the attention-seeking object is detected on the right side of the own vehicle, the direction is to the left, and when the attention-seeking object is detected on the left side of the own vehicle, the predetermined direction is the right direction. will be changed accordingly. In FIG. 6, the predetermined direction is the right side, which represents a case where the attention-seeking object is detected on the left side of the own vehicle.

The attention-calling image G40A shown in FIG. 6 also provides the same effect as the attention-calling image G40 shown in FIG. 4 described above. In particular, according to the attention-seeking image G40A shown in FIG. This makes it easier to intuitively understand on which side of the vehicle the vehicle was detected (left or right).

Note that in the example shown in FIG. 6, the steering wheel image G41A and the hand image G42A may be expressed as still images or as animations. In the case of animation, the process of steering in a predetermined direction from a neutral position may be repeatedly expressed in animation.

In FIG. 7, the attention-calling image G40B includes, in addition to a steering wheel image G41 representing the steering wheel 8, a hand image G42 representing a hand gripping the steering wheel 8, and a predetermined image G43 representing an attention-seeking object, two auxiliary images Includes images G44 and G45.

The two auxiliary images G44 and G45 are drawn in a manner that suggests prohibition of steering toward the side where the attention-drawing object is present. Specifically, the auxiliary image G44 is an arrow image indicating the steering direction to the side where the attention-drawing object is present, and the auxiliary image G45 suggests "prohibition" attached to the tip of the arrow in the auxiliary image G44. This is an image of an “x” mark.

The attention-calling image G40B shown in FIG. 7 also provides the same effect as the attention-calling image G40 shown in FIG. 4 described above. In particular, according to the attention-calling image G40B shown in FIG. ) becomes easier to understand intuitively.

In FIG. 8, the attention-seeking image G40C includes a steering wheel image G41 representing the steering wheel 8, a hand image G42 representing a hand gripping the steering wheel 8, and a predetermined image G43C representing an attention-seeking object.

The predetermined image G43C is different from the predetermined image G43 shown in FIG. 4 described above, and is an image of an "x mark" that suggests "prohibition" of steering to the corresponding side. In this case, the predetermined image G43C is preferably drawn in a color (for example, red) that is highly alert, similar to the predetermined image G43 shown in FIG. 4 described above. Thereby, the predetermined image G43C can effectively urge the driver to be highly alert. Further, the predetermined image G43C may be blinked or the like so as to efficiently attract the driver's attention, similar to the predetermined image G43 shown in FIG. 4 described above.

The attention-calling image G40C shown in FIG. 8 also provides the same effect as the attention-calling image G40 shown in FIG. 4 described above.

Next, an example of the operation of the control device 10 related to the attention-calling object display function will be described along the flowchart shown in FIG.

FIG. 9 is a flowchart illustrating an example of processing related to the attention-calling object display function of the control device 10. FIG. 10 is an explanatory diagram of the flowchart shown in FIG. 9, and is a diagram showing a transition mode of the display image (virtual image display) VI related to the flowchart shown in FIG. 9. FIG. 10 also shows a center line L1 for explanation (not part of the displayed image).

In step S900, the control device 10 determines whether or not the driving support ECU 66 is under driving support control based on information from the driving support ECU 66. If the determination result is "YES", the process advances to step S902; otherwise, the process advances to step S908.

In step S902, the control device 10 determines whether or not an attention-drawing object is detected based on information from the surrounding monitoring ECU 62. If the determination result is "YES", the process advances to step S904; otherwise, the process advances to step S906.

In step S904, the control device 10 realizes the display image G1010 in FIG. 10 by outputting a display image including the attention-calling image G40. As a result, in the case of FIG. 10, the driver can instantly recognize that there is an attention-drawing object on the left side of the vehicle. Note that in FIG. 10, the display image including the attention-calling image G40 differs from the display image shown in FIG. 4 in that the driving support image G50 is replaced with the driving support image G500. That is, in FIG. 4, the driving support image G50 is arranged below the attention-seeking image G40, whereas in FIG. 10, the driving support image G500 is arranged on the left side of the attention-seeking image G40. . In this way, an image such as the driving support image G50 may be displayed at any position as long as it does not significantly impede the visibility of the attention-calling image G40. However, the caution image G40 is preferably drawn and output such that the center position of the steering wheel image G41 is located on the center line L1.

In step S906, the control device 10 realizes the display image G1000 in FIG. 10 by outputting a display image including a control information image G1001 (an example of a second image) representing the state of driving support control. Control information image G1001, unlike warning image G40, includes vehicle image G1002 representing the outer shape of the vehicle related to the preceding vehicle. Further, the control information image G1001 includes an image G1003 representing a steering control state and an image G1004 representing a tracking control state. As shown in FIG. 10, the image G1003 may include an image simulating the steering wheel 8 and an image representing a lane. Note that a hand image such as the hand image G42 is not associated with the image imitating the steering wheel 8 in the image G1003. However, if it is detected that the driver is not letting go of the steering wheel 8, a hand image prompting the driver to grasp the steering wheel 8 may be displayed. The control information image G1001 is drawn and output such that the center position of the image imitating the steering wheel 8 (or the center position of the vehicle image G1002) is located on the center line L1.

In step S908, the control device 10 determines whether or not an attention-drawing object is detected based on information from the surrounding monitoring ECU 62. If the determination result is "YES", the process advances to step S910; otherwise, the process advances to step S912.

In step S910, similarly to step S904, the control device 10 realizes the display image G1010 in FIG. 10 by outputting a display image including the attention-calling image G40.

In step S912, the control device 10 outputs a display image (not shown) that does not include either the attention image G40 or the control information image G1001. The display image in this case may include only the driving support image G50, for example. In this case, the size and display position of the driving support image G50 may be the same as or different from the size and display position of the driving support image G50 included in the display image including the attention-calling image G40 (step S904, step S910). It's okay.

According to the example shown in FIGS. 9 and 10, the display output by the TFT panel unit 3 when an attention-drawing object on the side of the own vehicle is detected during driving support control ("YES" in step S902). The image is switched from the display image including the control information image G1001 to the display image including the attention-calling image G40 (see arrow R10 in FIG. 10). Thereafter, when the attention-seeking object on the side of the own vehicle is no longer detected ("NO" in step S902), the display image output by the TFT panel unit 3 is changed from the display image including the attention-seeking image G40 to the control information image. The display image is switched to a display image including G1001 (see arrow R11 in FIG. 10). In this way, the display image output by the TFT panel unit 3 is changed into a display image including the control information image G1001 and a display image including the attention-calling image G40, depending on the detection status of the attention-calling object on the side of the own vehicle. You can switch between. As a result, even during driving support control, the driver can see at a glance information indicating an attention-seeking object on the side of his/her own vehicle, and on which side of the vehicle (left or right) the attention-seeking object is detected. It can be output in an understandable manner.

Further, according to the example shown in FIG. 10, the size of the entire display image including the control information image G1001 is the same as the size of the entire display image including the attention-calling image G40, and as described above, the size of the entire display image including the control information image G1001 is The center position of G1001 (in this case, corresponds to the center position of vehicle image G1002, see center line L1) and the center position of attention image G40 (in this case, corresponds to the center position of steering wheel image G41, see center line L1). matches. This can reduce inconveniences that may occur due to switching the display image output by the TFT panel unit 3 between the display image including the control information image G1001 and the display image including the attention-calling image G40. That is, each time the display image output by the TFT panel unit 3 is switched between the display image including the control information image G1001 and the display image including the attention-calling image G40, the center position of the control information image G1001 and the attention-calling image G1001 are changed. If the center position of the alerting image G40 changes, the driving position suggestion function of the steering wheel image G41 and the hand image G42 is likely to deteriorate when a display image including the alerting image G40 is output. According to the example shown in FIG. 10, such inconvenience can be effectively reduced.
Note that in the process shown in FIG. 9, a display image including the attention-calling image G40 is output in step S910 even when driving support control is not in progress, but the present invention is not limited to this. For example, if driving support control is not in progress, step S910 and step S912 may be omitted. Further, in the process shown in FIG. 9, step S912 is executed, but step S912 may be omitted.

Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes can be made within the scope of the claims. It is also possible to combine all or a plurality of the components of the embodiments described above.

For example, in the embodiments described above, the attention-seeking object is mainly a moving object such as a vehicle that can travel at a relatively high speed, but the object is not limited thereto. For example, the attention-seeking object may be a pedestrian or an animal that may cross in front of the vehicle. Such an attention-getting object may be detected by an image sensor (for example, an infrared camera) or the like.

Further, in the embodiments described above, the control device 10 may realize some or all of the functions of the surrounding monitoring ECU 62, or may realize some or all of the functions of the driving support ECU 66.

Furthermore, in the embodiment described above, the output of the display image including the attention-calling image G40 may be accompanied by the output of sound or vibration from the viewpoint of increasing the attention-calling to the driver. In this case, vibrations may be generated in the seat, steering wheel 8, etc.

Further, in the embodiment described above, the attention-seeking image such as the attention-seeking image G40 may include an image representing other parts present around the steering wheel 8, such as the instrument panel 9. In this case, the state of the driver inside the vehicle can be more realistically reproduced, and the driving position suggestion function using the steering wheel image G41 and the hand image G42 can be enhanced.

1 Head-up display 2 Case 3 TFT panel unit 4 Mirror 5 Mirror 6 Backlight unit 8 Steering wheel 9 Instrument panel 10 Control device 60 Peripheral equipment 62 Surrounding monitoring ECU
64 Side radar sensor 66 Driving support ECU

Claims (5)

outputting information representing an attention-seeking object on the side of the vehicle as a first image including a steering wheel image representing a steering wheel and a hand image representing a hand gripping the steering wheel;
The first image further includes a predetermined image representing the attention-seeking object on the right side of the steering wheel image when the attention-seeking object is detected on the right side of the own vehicle; If detected on the left side, further including the predetermined image on the left side of the steering wheel image,
During the driving support control, information indicating that the driving support control is being performed is output as a second image,
switching from the second image to the first image when the attention-seeking object is detected during driving support control;
The second image includes a vehicle image representing the outer shape of the vehicle,
The first image does not include a vehicle image representing the outer shape of the vehicle,
The horizontal center position of the steering wheel image when the first image is output and the horizontal center position of the vehicle image of the second image when the second image is output are the same. head - up display device. The head-up display device according to claim 1 , wherein the steering wheel image and the hand image are drawn to represent a state in which the steering wheel is held in a neutral position by both hands of the driver. The steering wheel image and the hand image are drawn to represent a state in which the steering wheel is steered in a predetermined direction by both hands of the driver from a neutral position,
The predetermined direction is a direction to the left when the attention-seeking object is detected on the right side of the own vehicle, and a right direction when the attention-seeking object is detected on the left side of the own vehicle. The head-up display device according to claim 1 , wherein the head-up display device is changed according to the detection result of. The head-up display device according to claim 1, wherein the predetermined image includes an auxiliary image that suggests prohibition of steering toward the side where the attention-drawing object is present. The caution object is at least one of a moving object that may enter in front of the own vehicle on the own lane, and a moving object existing on the lane to which the own vehicle is changing when the lane is scheduled to change. The head-up display device according to any one of claims 1 to 4 , which is one of the above.