JP6872441B2 - Head-up display device - Google Patents

Description

The present invention relates to a head-up display device that is mounted on a vehicle or the like and is suitable for displaying various video information.

In recent years, as one of the technologies for superimposing an image on a real space, a vehicle image display device (so-called head-up display device (hereinafter, HUD)) for displaying various information on a vehicle windshield (windshield) has been put into practical use. It has been transformed. For example, by providing information for the driver as video information (display content) to be displayed, it is possible to support the driving operation of the vehicle. For example, Patent Document 1 discloses a configuration in which the image display position is moved in the left-right direction according to the moving state of the vehicle and the driving operation of the driver. Regarding the size of the display area, for example, a small screen HUD that displays an image only in the driving lane and a large screen HUD that displays an image in a lane adjacent to the driving lane or above the viewpoint position. is there.

Japanese Unexamined Patent Publication No. 2001-301486

On the small screen HUD, information indicating the state of the vehicle is displayed in a narrow area, so it does not interfere with normal driving, but the area is narrow to additionally display guidance information such as when turning left or right, and driving operation You will not be able to display the information you need.

On the large screen HUD, in addition to the information indicating the state of the vehicle, it is possible to superimpose a virtual image on the foreground and display it (augmented reality display), but constantly displaying the image in a wide display area hinders driving. It can be. Further, in order to visually recognize the information displayed near the periphery of the large screen HUD, the viewpoint may move, which may lead to dangerous driving.

Conventionally, since the size of the display area of the HUD is fixed, it is not possible to display information in a timely and appropriate (easy-to-see) display area size according to the operating state. Patent Document 1 describes that the display position is moved left and right, but does not describe that the size of the display area is changed.

An object of the present invention is to provide a head-up display device that displays necessary information for a driver in an easy-to-see and safe manner.

The head-up display device according to the present invention includes a vehicle information acquisition unit that acquires vehicle information of a vehicle by a device installed in the vehicle, an image display device that generates a projected image, and vehicle information acquired by the vehicle information acquisition unit. Based on this, the control unit is provided with a control unit that determines the image to be generated by the image display device, and the control unit classifies the vehicle information into a plurality of event information and sets the image display device according to the change of the acquired event information. The video content to be generated is changed and determined, and the size of the area for displaying the video content is changed and set.

Therefore, in order to change the size of the display area, the control unit determines which area of the coordinate management table in which the range of the changed display area is described by the coordinate values or the display area divided into a plurality of areas is valid. Holds the divided area management table that describes.

According to the present invention, it is possible to provide a head-up display device that displays necessary information for a driver in an easy-to-see and safe manner.

The schematic diagram explaining the outline of the head-up display device (HUD) mounted on a vehicle. The schematic diagram which shows the image display operation by HUD. The figure which shows the example of the hardware configuration which concerns on the acquisition of vehicle information. The block diagram which shows the structure of the control system of HUD. The figure which shows the display example when the size of a display area is small. The figure which shows the display example when the size of a display area is large. The figure which shows the case where the display area is enlarged in the left-right direction. The figure which shows the case where the display area is enlarged in the vertical direction. The figure which shows the other example which enlarges a display area. The figure explaining the method of managing a display area by coordinates. The figure explaining the method of dividing and managing a display area. The figure which shows the example of area size switching according to the traveling position of a vehicle. The figure which shows the example of area size switching according to the steering angle of a vehicle. The figure which shows the example of area size switching according to the viewpoint position of a driver. The figure which shows the case where the area size is gradually restored. The figure which shows the example of area size switching according to a running state. The figure which shows an example of the event management table. The figure which shows an example of the area size change table. The flowchart which shows the basic operation (initial operation) of HUD. The flowchart which shows the basic operation (normal operation) of HUD. A flowchart showing the details of the display area resizing process.

An embodiment of a head-up display device (hereinafter, HUD) according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram illustrating an outline of the HUD mounted on the vehicle. The HUD 1 is mounted on the vehicle 2 and projects the image generated by the image display device 30 onto the windshield 3 (also referred to as a windshield) of the vehicle 2 via the mirrors 51 and 52. The image reflected by the windshield 3 is incident on the driver's eyes, and the driver visually recognizes the image from the HUD. The displayed video contains information related to driving and assists the driving operation. Inside the HUD 1, a vehicle information acquisition unit 10 that acquires various vehicle information 4 and a control unit 20 that generates video information to be displayed based on the vehicle information acquisition unit 10 and controls the video display device 30 are not shown here. It has a mirror drive unit and a speaker that outputs voice information to the driver. The vehicle information 4 includes vehicle speed information indicating the driving state of the own vehicle, steering angle information of the steering wheel, camera image information, and the like.

Here, the projected member is not limited to the windshield 3, and any member that projects an image can be another member such as a combiner. The image display device 30 is composed of a projector having a backlight, an LCD (Liquid Crystal Display), or the like. It may be a self-luminous VFD (Vacuum Fluorescent Display) or the like.

FIG. 2 is a schematic diagram showing a video display operation by the HUD. An image for display is emitted from the image display device 30 installed at the lower part of the dashboard of the vehicle 2. The image is reflected by the first mirror 51 and the second mirror 52 (for example, a concave mirror, a free-form mirror, a mirror having an optical axis asymmetric shape, etc.) and projected toward the windshield 3. The first mirror 51 is fixed, and the second mirror 52 is rotatable by a mirror drive unit.

The image converged and projected from the mirror 52 is reflected by the windshield 3 and incident on the driver's eyes 5 to form an image on the retina, so that the image can be visually recognized. At that time, the driver is looking at the virtual image 9 existing in front of the windshield 3.

FIG. 3 is a diagram showing an example of a hardware configuration related to the acquisition of vehicle information 4. The vehicle information 4 is acquired by, for example, an information acquisition device such as various sensors installed in the vehicle 2 under the control of the electronic control unit (ECU) 21 in the control unit 20. The functions of each device will be described below. It should be noted that it is not always necessary to have all of these devices in order to execute the operation of this embodiment, and other types of devices may be added as appropriate.

The vehicle speed sensor 101 acquires the speed information of the vehicle 2. The shift position sensor 102 acquires the current gear information of the vehicle 2. The steering wheel steering angle sensor 103 acquires steering wheel steering angle information. The headlight sensor 104 acquires lamp lighting information related to On / Off of the headlight. The illuminance sensor 105 and the chromaticity sensor 106 acquire external light information. The distance measuring sensor 107 acquires distance information between the vehicle 2 and an external object. The infrared sensor 108 acquires infrared information related to the presence / absence of an object, the distance, and the like at a short distance of the vehicle 2. The engine start sensor 109 detects engine On / Off information.

The acceleration sensor 110 and the gyro sensor 111 acquire acceleration gyro information including acceleration and angular velocity as information on the posture and behavior of the vehicle 2. The temperature sensor 112 acquires temperature information inside and outside the vehicle. The wireless transmitter / receiver 113 for road-to-vehicle communication is based on road-to-vehicle communication between the vehicle 2 and the roadside unit, and the wireless transmitter / receiver 114 for vehicle-to-vehicle communication is based on vehicle-to-vehicle communication between the vehicle 2 and other vehicles in the vicinity. , Acquire information around the vehicle 2.

The camera (inside the vehicle) 115 and the camera (outside the vehicle) 116 take images of the situation inside and outside the vehicle, respectively, and acquire camera image information (inside / outside the vehicle). The camera (inside the vehicle) 115 captures, for example, the posture of the driver, the position of the viewpoint, the movement, and the like. By analyzing the obtained image, for example, it is possible to acquire information such as the driver's fatigue status and eye height. Further, the camera (outside the vehicle) 116 captures the surrounding conditions such as the front and the rear of the vehicle 2. By analyzing the obtained image, for example, it is possible to grasp the presence or absence of moving objects such as other vehicles and pedestrians in the vicinity, buildings and terrain, and road surface conditions (rain, snow, freezing, unevenness, etc.). Is.

The GPS (Global Positioning System) receiver 117 and the VICS (Vehicle Information and Communication System: Vehicle Information and Communication System, registered trademark (same below)) receiver 118 receive GPS signals, respectively. The VICS information obtained by receiving the GPS information and the VICS signal to be obtained is acquired. By acquiring this information and collating it with the map data, it is possible to generate map information indicating the vehicle 2 position and the traveling direction.

FIG. 4 is a block diagram showing a configuration of a control system of HUD1 in this embodiment. Various vehicle information 4 is input to the vehicle information acquisition unit 10 and sent to the control unit 20. In particular, the information related to the operation of this embodiment includes vehicle speed information, steering angle information, camera image information inside / outside the vehicle, GPS information, and the like.

The electronic control unit (ECU, Electronic Control Unit) 21 in the control unit 20 controls various operations on the image display device 30 based on the input vehicle information 4. The image display device 30 includes a light source 31 such as an LED or a laser, an illumination optical system (not shown), and a display element 32 such as a liquid crystal element, and emits the image light generated by the display element 32 toward the mirror 52. ..

The main functions in the control unit 20 are as follows. The audio output unit 22 generates an audio signal to the speaker. The non-volatile memory 23 stores a program executed by the ECU 21, and the memory 24 stores video information and various control information.

The light source adjusting unit 25 controls the light source 31 in the image display device 30. The distortion correction unit 26 corrects the distortion of the video signal to be displayed, and the display element driving unit 27 drives the display element 32 in the video display device 30 based on the corrected video signal. The mirror adjusting unit 28 outputs a drive signal to the mirror driving unit in order to adjust the position and orientation of the mirror 52.

The content display control unit 33 controls the video (content) displayed on the video display device 30. The display area size control unit 34 controls the size of the image area to be displayed by the image display device 30. The size of the display area is the size of the display area of the virtual image 9 that the driver visually recognizes forward through the windshield 3 in FIG.

Here, the operations of the content display control unit 33 and the display area size control unit 34 are linked to each other, and when the type or number of display contents is increased or decreased, the size of the display area is enlarged / reduced accordingly. is there. That is, the drawing area of the content is enlarged / reduced in the area that can be displayed by the video display device 30, and the scale of the same content is not enlarged / reduced and displayed. Hereinafter, the processing by the content display control unit 33 and the display area size control unit 34 in this embodiment is simply referred to as "display area size change processing".

First, a problem when the size of the display area is fixed will be described.
FIG. 5A is a diagram showing a display example when the size of the display area is small (small screen HUD). It shows the scenery (foreground) seen in front through the windshield 3. (A) indicates a display area, and the display area 61 of the small screen is set according to the viewpoint position 62 of the driver.

(B) shows a display example of video content, for example, an object 63 indicating a vehicle speed and a traveling direction is displayed in the display area 61. This is sufficient to know the current state of the vehicle, but it is difficult to add more information due to the limited display area. For example, it is difficult to add and display a guide object 64 indicating where to turn right when making a right turn in the future. Therefore, it is not possible to sufficiently display information useful for driving operations.

FIG. 5B is a diagram showing a display example when the size of the display area is large (large screen HUD). (A) indicates a display area, and the display area 65 of the large screen is set according to the viewpoint position 66 of the driver.

(B) shows a display example of video content. For example, in addition to displaying the vehicle speed and destination guidance object 67 in the display area 65, the object 68 is superimposed to emphasize the pedestrian in the foreground. Can be displayed. However, as a result of displaying too many objects, the driver's field of vision may be obstructed or the driver may feel that it is difficult to concentrate on driving. Further, as compared with the small screen HUD of FIG. 5, the object displayed near the periphery of the display area 65 is located far from the viewpoint position 66 during driving, so that the viewpoint movement when viewing the object becomes large and dangerous driving occurs. There is a risk of being connected.

As described above, when the size of the display area is fixed, it is difficult for the driver to easily and safely display useful and necessary information according to the driving situation. On the other hand, in this embodiment, the size of the display area can be changed. As a result, the advantages of the small screen HUD and the large screen HUD can be switched and used. This will be described in detail.

First, FIGS. 6A to 6C show examples of various enlargement patterns of the display area size.
FIG. 6A is a diagram showing a case where the display area is enlarged in the left-right direction. With respect to the reference size of (1), (2) is enlarged to the left, (3) is enlarged to the right, and (4) is enlarged to the left and right. The dashed line indicates the shape and position of the reference size before enlargement.

FIG. 6B is a diagram showing a case where the display area is enlarged in the vertical direction. With respect to the reference size of (1), (2) is enlarged upward, (3) is enlarged downward, and (4) is enlarged vertically.

FIG. 6C is a diagram showing another example of enlarging the display area. (1) expands in all directions, (2) expands in the upper left direction, (3) expands in the right direction, and then expands downward to form an L shape.

The above is an example of an expansion pattern, and the expansion width may be halfway and may be expanded step by step. Further, in the above example, the reference size is set to a small screen, but conversely, the same applies when the size is reduced with a large screen as a reference size.

FIG. 7 is a diagram illustrating a method of managing the display area by coordinates.
(A) is an example in which a rectangular display area is represented by XY coordinates. For example, the display area 71 at the time of a small screen can be represented by the coordinates of the four corners where the origin coordinates are (35, 25). Further, using the same coordinate system, the display area 72 at the time of a large screen can be represented by the coordinates of the four corners where the origin coordinate is (0,0).

(B) is a coordinate management table, and an area can be set and managed by the maximum value of the origin coordinate, the X coordinate, and the maximum value of the Y coordinate. This coordinate management table is stored in the memory 24.

FIG. 8 is a diagram illustrating a method of dividing and managing the display area. The coordinate management of FIG. 7 is effective when the area is rectangular, but is not suitable when the area is L-shaped as shown in FIG. 6C (3). Therefore, as shown in (a), the maximum displayable area is divided into a plurality of areas (3 × 3 = 9 divisions in this example).

Then, as shown in (b), a flag (valid / invalid flag) indicating whether or not each of the divided areas A to I is used for display is added, and the divided areas are managed in the divided area management table. The coordinates of each of the divided areas A to I are also described in the divided area management table. In this way, the display area can correspond to any shape other than the rectangle. This divided area management table is also stored in the memory 24.

Hereinafter, the size change of the display area according to the running state of the vehicle and the state of the driver will be described by a specific example. FIG. 9 is a diagram showing an example of area size switching according to the running position of the vehicle. The traveling position (plan view) of the vehicle is shown on the upper side of the drawing, and the display screen as seen from the driver's seat is shown on the lower side. For example, assume that the own vehicle 81 turns left at the intersection 82 ahead.

(A) is a case where the own vehicle 81 is traveling in front of the intersection 82, and a straight-ahead arrow indicating the distance information to the intersection 82 and the traveling direction is displayed in the reduced size display area 83a.
(B) is a case where the own vehicle 81 approaches the intersection 82, and an arrow indicating the left turn position is added and displayed in the display area 83b whose size is enlarged to the left to guide the destination.
(C) is a case where the own vehicle 81 has completed a left turn, and a straight arrow indicating the traveling direction is displayed in the display area 83c whose size has been returned to the original reduced size.

The positional relationship of the own vehicle 81 with respect to the intersection 82 can be determined from the external camera image information and the map information (GPS information). As a result, the information necessary for the driver for the left turn operation can be displayed in a size that does not interfere with the driving.

FIG. 10A is a diagram showing an example of region size switching according to the steering angle of the vehicle. For example, when the handle 84 is turned to the left, the size of the display area 85 is enlarged to the left. At that time, the expansion width is changed stepwise as 85a → 85b → 85c according to the steering angle (the amount of turning the steering wheel), and the number of left turn arrows in the area is increased. The steering angle is detected by the rotation angle of the steering wheel. As a result, it is possible to provide the driver with a realistic display that follows the steering wheel operation.

FIG. 10B is a diagram showing an example of region size switching according to the viewpoint position of the driver. For example, when the handle 84 is turned to the left, the size of the display area 87 is enlarged to the left. At that time, the enlargement width is changed stepwise as 87a → 87b → 87c according to the positions a, b, and c of the driver's viewpoint 86, and the position of the left turn arrow in the area is moved. The driver's viewpoint position is detected by the in-vehicle camera. As a result, it is possible to perform a realistic display that follows the movement of the driver's viewpoint.

FIG. 10C is a diagram showing a case where the area size is gradually restored. For example, when it is determined that the left turn operation is completed and the driver's viewpoint position returns to the front direction, the enlarged area size is reduced to the original size display area 88, and the left turn arrow displayed in the area is changed. to erase. At that time, the size reduction (erasing the arrow) is not performed instantaneously, but a time lag is provided. That is, by gradually reducing and erasing the area in the order of 88c → 88b → 88a, the display becomes easy for the driver to see. However, if there is a time lag that interferes with the next driving operation, such as when turning right immediately after turning left, switch instantly.

FIG. 11 is a diagram showing an example of region size switching according to a traveling state.
(A) expands to the left or right when the vehicle is traveling on a highway or a plurality of lanes and the width of the lane is wide. (B) is the case where the vehicle speed is accelerated / decelerated. When accelerating, the driver looks far away, so the size is expanded upward, and when decelerating, the driver looks near, so the size is reduced. return.

(C) is a case where a pedestrian or an obstacle is detected, and the object 68 for emphasizing the detected object is enlarged to be displayed at the detected position. In addition, the size can be switched according to the position of other vehicles and the driving environment (brightness, weather conditions).

In the above-mentioned size change of the display area, the relationship between the running state of the vehicle and the state of the driver (hereinafter referred to as event information) and the display area size suitable for the relationship is set in advance and held in the management table.

FIG. 12 is a diagram showing an example of an event management table. In the event management table, the types of event information are distinguished by the ID number, and the states 1 to 3 that can be taken for each event type (ID) are managed by bit data. For example, when an object is detected in the forward left direction, it is expressed as ID = 1 and bit data = (010). When the steering wheel is turned to the left, ID = 3 and bit data = (100) are expressed.

FIG. 13 is a diagram showing an example of the area size change table. How to change the display area size is defined for each event type (ID) and its state (bit data) in FIG. 12. For example, when ID = 1 and bit data = (100) (when an object is detected in front of the front), if the current size is an enlarged size, it is changed to a reduced size. When ID = 2 and bit data = (010) (when the map information is a left turn), the size is expanded to the left.

It is possible that a plurality of event information may occur at the same time. Since it is possible that the instruction for changing the area size for each event information is different, it is preferable to give priority to the event ID. Alternatively, the judgment is made by combining other event information. For example, if the map information (ID = 2) is a left turn (010) but the steering information (ID = 3) is to the right (010) and the instructions of both are inconsistent, the driver's viewpoint position (ID = 4). If is to the left (010), it is determined to be a "left turn".

14A and 14B are flowcharts showing the basic operation of the HUD. FIG. 14A shows the initial operation, and FIG. 14B shows the normal operation. The normal operation of FIG. 14B includes a process of changing the display area size. The following processing is controlled by the electronic control unit (ECU) 21 of the control unit 20.

In the initial operation (S200) of FIG. 14A, when the engine start sensor 109 receives the signal of the power supply (ignition) On (S201), the vehicle information acquisition unit 10 acquires the vehicle information 4 (S202). First, an appropriate brightness level is calculated from the external light information obtained by the illuminance sensor 105 (S203). The light source adjusting unit 25 is controlled to set the brightness level of the light source 31 (S204).

Information selected by the driver (for example, current vehicle speed information) is extracted from the acquired vehicle information 4, and an image to be displayed is determined (S205). The distortion correction unit 26 corrects the image distortion generated in the projection optical system with respect to the displayed image (S206). The display element drive unit 27 supplies a drive signal to the display element 32 (S207). It is determined whether or not the HUD display On signal has been received (S208), and the process waits until the On signal is received (S209). Upon receiving the On signal, the light source 31 of the image display device 30 is turned on, and the projection display of the image, that is, the normal operation of the HUD is started (S210).

In the normal operation (S210) of FIG. 14B, the vehicle information 4 is continuously acquired via the vehicle information acquisition unit 10 (S211), and the brightness level adjustment process of the displayed image is performed according to the current outside light information (S212). ).

Next, the content display control unit 33 changes / determines the content of the video (content) to be displayed according to the current running state of the vehicle and the driver's state (event information) (S213). For example, when turning left or right at an intersection ahead, a guide object indicating the position to turn left or right is added, and when an obstacle is found, an object that emphasizes this is added. Also, when these events are finished, the object used for them is deleted.

Further, the display area size control unit 34 changes the size of the image display area according to the current running state of the vehicle and the state of the driver (event information) (S214). That is, in cooperation with the display content of S213, it is determined in which direction and how much the size of the display area is enlarged or reduced.
The details of the content change / determination process (S213) and the display area size change process (S214) will be described later.

The display element driving unit 27 controls the display element to update the display image (S215). When the mirror adjustment signal is received, the mirror adjustment unit 28 performs the adjustment process of the mirror 52 (S216). It is determined whether or not the HUD display Off signal has been received (S217), and the process from S211 is repeated until the Off signal is received. When the Off signal is received, the light source 31 of the image display device 30 is turned off, and the projection display of the image is terminated (S218).

FIG. 14C is a flowchart showing the details of the display area resizing process. The display area size change process (S220) includes the content change / determination process (S213) and the display area size change process (S214) in FIG. 14B. This process is performed in cooperation with the content display control unit 33 and the display area size control unit 34.

First, the display area size control unit 34 refers to the memory 24 and acquires the current display area size (S221). That is, the setting of the current display area in the coordinate management table of FIG. 7 and the divided area management table of FIG. 8 is acquired. Then, it is determined whether or not there is a change in the event information (driving state of the vehicle or the state of the driver) from the vehicle information acquired in S211 (S222). If there is no change in the event information, the process proceeds to S230 and the current display state is continued.

If there is a change in the event information, the event management table of FIG. 12 is referred to, and the ID and status (bit data) of the corresponding event are acquired (S223). For example, when the current event information is in a state of turning left due to the map information, the event ID = 2 and the bit data = (010) are acquired.

Subsequently, the area size change table of FIG. 13 is referred to, and the area size change instruction corresponding to the event ID and the bit data acquired in S223 is acquired (S224). In the case of the above event information, the instruction "expand the size to the left" is obtained from the table of FIG.

Next, the instruction for changing the area size acquired in S224 is compared with the current display area size acquired in S221, and it is determined whether or not the display area size needs to be changed (S225). At this time, as a result of other event information that precedes in time, the display area size may have already been changed to the same. In this case, it is not necessary to change the size, and the process proceeds to S228.

When it is determined that the display area size needs to be changed, the coordinate management table of FIG. 7 and the divided area management table of FIG. 8 are referred to (S226). Then, the coordinates of the new display area and the valid flag of the divided area are acquired, and the area of the display image is changed based on this (S227). For example, when "enlarging the size to the left", the divided areas D and E in FIG. 8 are set as the display area. The same applies to the case where the display area is gradually enlarged or reduced as shown in FIGS. 10A and 10B.

Next, the content display control unit 33 changes / determines the content of the content to be drawn in response to the change in the current event information (S228). For example, when turning left, an object (arrow) indicating left turn guidance is added as the content to be drawn. Further, the number of objects may be increased or decreased as shown in FIG. 10A according to the steering angle. Then, the drawing process of the content changed in S228 is performed according to the display area changed in S227 (S229). As a result of the determination in S225, even if the area size is not changed, the drawing process of the changed content is performed.

This completes the display area size change process and the content change process linked to the display area size change process (S230). After that, the process proceeds to S215 of FIG. 14B.

As described above, according to the present embodiment, the size of the display area of the head-up display device can be changed, and the display is made according to the ever-changing state of the vehicle, the state of the road, the state of the driver, and the like. Increase and reduce the size of the area in the required direction and by the required amount. As a result, it is possible to display information that assists driving in an easy-to-read and safe manner to the driver at a timely and appropriate position.

1: Head-up display device (HUD),
2: Vehicle,
3: Windshield,
4: Vehicle information,
9: Virtual image,
10: Vehicle information acquisition department,
20: Control unit,
21: Electronic control unit (ECU),
30: Video display device,
33: Content display control unit,
34: Display area size control unit,
61, 65, 71, 72: Display area.

Claims (7)

In a head-up display device that is mounted on a vehicle and displays a virtual image in front of the vehicle by generating and projecting an image.
A vehicle information acquisition unit that acquires vehicle information of the vehicle by a device installed in the vehicle, and a vehicle information acquisition unit.
An image display device that generates the image to be projected, and
A control unit that determines the image generated by the image display device based on the vehicle information acquired by the vehicle information acquisition unit is provided.
The control unit classifies the vehicle information into a plurality of event information, changes and determines the video content generated by the video display device according to the change in the acquired event information, and displays the video content. Change the size of the area to be used (hereinafter referred to as the display area) and set it.
Further, the control unit determines the direction in which the display area is expanded based on the movement of the steering wheel of the vehicle as the event information, and the display area is determined according to the amount of turning the steering wheel and the expansion direction of the display area. Gradually switch the size of
A head-up display device characterized by this. In the head-up display device according to claim 1,
In order to change the size of the display area, the control unit enables a coordinate management table in which the range of the changed display area is described by coordinate values, or a display area divided into a plurality of areas. A head-up display device that holds a divided area management table that describes the above. In the head-up display device according to claim 1,
The control unit expresses the event information by an event ID, divides the event ID into a plurality of states and expresses it as bit data, and displays the event ID and the bit data corresponding to the event management table. A head-up display device that holds an area resizing table that defines how to resize an area. In the head-up display device according to claim 1,
When the control unit detects that the vehicle makes a right / left turn based on map information or steering information as the event information, the control unit displays a predetermined object indicating the direction in which the vehicle makes a right / left turn at a position where the vehicle makes a right / left turn. A head-up display device characterized by increasing the size of the display area. In the head-up display device according to claim 1,
When a pedestrian or an obstacle is detected in front of the vehicle by an outside camera as the event information, the control unit expands the size of the display area so as to display a predetermined object at the detected position. Head-up display device. In the head-up display device according to claim 4 or 5.
The control unit is a head-up display device characterized in that when the detected event information ends, the size of the enlarged display area is gradually reduced with a time lag. In the head-up display device according to claim 1,
The control unit is a head-up display device characterized in that the driver's viewpoint position is detected by an in-vehicle camera as the event information, and the size of the display area is enlarged or reduced according to the detected position.

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