WO2016051586A1

WO2016051586A1 - Display control device

Info

Publication number: WO2016051586A1
Application number: PCT/JP2014/076541
Authority: WO
Inventors: 奈津季織田; 敬平野; 太郎熊谷
Original assignee: 三菱電機株式会社
Priority date: 2014-10-03
Filing date: 2014-10-03
Publication date: 2016-04-07
Also published as: JPWO2016051586A1; JP6184607B2

Abstract

In the present invention, a HUD (14) displays virtual images of information regarding display subjects on a reference layer (L1) that is fixed in position in the depth direction, which is the direction extending from the driver (15) to the area in front, and a proximal additional layer (L2) and distal additional layer (L3) disposed at different positions in the depth direction. Vehicle-related vehicle information among the information regarding display subjects is displayed on the reference layer (L1) position. Additional information other than vehicle information among the information regarding display subjects is displayed on the proximal additional layer (L2) or distal additional layer (L3) depending on the focal position of the driver (15) that is estimated according to the driving situation.

Description

Display control device

The present invention relates to a display control device for controlling a head-up display type display device mounted on a vehicle.

In a head-up display type display device that allows a driver to check necessary information without taking his gaze off the road ahead, a method has been proposed in which the information display position is changed in the depth direction ahead of the vehicle as viewed from the driver. ing.

For example, in the invention according to Patent Document 1, the position in the depth direction where information is displayed is changed according to the vehicle speed. The driver looks closely when the vehicle speed is slow and looks far away when the vehicle speed is fast. The effect of reducing the amount (congestion fluctuation) by which the driver moves his / her line of sight in the depth direction is shown.

In the invention according to Patent Document 2, the position in the depth direction where information is displayed is changed according to the focal position of the driver calculated based on the camera image. The focus position is a position in the depth direction where the focus is in the case where the driver focuses on a position and focuses his eyes on the position. By displaying information in the vicinity of the focal position, the effect of reducing the driver's congestion fluctuation and suppressing eye fatigue is shown.

JP 11-119147 A JP 2005-301144 A

The conventional head-up display is configured to change the information display position in the depth direction, but displays all types of information at a single position. Information to be displayed here is information that can be easily recognized by the driver, such as vehicle information, and is displayed in accordance with the focus position of the driver, such as a guide arrow, to suppress fluctuations in congestion. There is additional information that should be. However, in the case where all types of information are displayed at a single position, it has not been possible to make it easy for the driver to recognize and to suppress fluctuations in congestion.

The present invention has been made to solve the above-described problems, and is a head that can make a driver easily recognizable regardless of the type of information and can suppress fluctuations in congestion. An object of the present invention is to provide a display control device for an up display.

The display control device according to the present invention includes a driving situation estimation unit that estimates a driver's focal position based on a driving situation of the vehicle, and vehicle information related to the vehicle in the display target information in a depth direction from the driver forward. The position is displayed at a predetermined reference position, and the additional information other than the vehicle information in the display target information is located on the far side in the depth direction with respect to the reference position, and the position can be changed. And a display position determination unit that displays the additional position according to the driver's focal position estimated by the driving state estimation unit.

According to the present invention, the vehicle information and the additional information are displayed separately at different positions, and the display position of the additional information is changed according to the estimated focus position of the driver. Therefore, it is possible to make it possible for the driver to easily recognize and to suppress fluctuations in congestion. That is, since the vehicle information is displayed at the reference position, the driver can easily recognize it. Furthermore, since the additional position for displaying the additional information is changed according to the estimated focus position of the driver, it is possible to reduce the amount of movement of the line of sight in the depth direction of the driver and suppress the fluctuation of the congestion.

It is a block diagram which shows the structural example of the display control apparatus which concerns on Embodiment 1 of this invention. 3 is a schematic diagram of a head-up display type display device controlled by the display control device according to Embodiment 1. FIG. It is a figure explaining the principle by which display object information is displayed in three dimensions. It is a figure explaining the kind of display target information. It is a graph which shows the relationship between a driver | operator's focus position and vehicle speed. 3 is a flowchart illustrating an operation by an operation state estimation unit according to the first embodiment. 4 is a flowchart illustrating an operation performed by a display position determination unit according to the first embodiment. It is a flowchart which shows the operation | movement by the driving condition estimation part of the display control apparatus which concerns on Embodiment 2 of this invention. 6 is a schematic diagram for explaining a reference layer L1 and an additional layer L21 according to Embodiment 2. FIG. It is a block diagram which shows the structural example of the display control apparatus which concerns on Embodiment 3 of this invention. It is a schematic diagram explaining the reference | standard layer L1, the short distance addition layer L2, the long distance addition layer L3, and the guidance layer addition layer L31 of Embodiment 3. 10 is a flowchart illustrating an operation performed by a display position determination unit according to the third embodiment.

Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration example of a display control apparatus 1 according to Embodiment 1 of the present invention. This display control device 1 is mounted on a vehicle and connected to a vehicle speed sensor 2, a GPS sensor 3, an operation mode acquisition unit 4, an object detection sensor 5, a navigation device 6, and a 3D liquid crystal display 11 that are also mounted on the vehicle. Yes.

FIG. 2 is a schematic diagram of a head-up display type display device (hereinafter referred to as HUD 14) controlled by the display control device 1 according to the first embodiment.
The 3D liquid crystal display 11 is a liquid crystal display that displays an image that can be stereoscopically viewed with the naked eye by a parallax barrier method, and is a display image received from the display control device 1 (right eye image and left eye image of display target information). Image). The display target information displayed on the 3D liquid crystal display 11 is reflected by the half mirror 13 through the Fresnel lens 12 and visually recognized by the driver 15. The half mirror 13 may be composed of a vehicle windshield. Or you may comprise with the combiner which is a flat member provided between the windshield and the driver | operator 15. FIG. At this time, the reference layer L1 in which the position in the depth direction as viewed from the driver 15 is fixed, the short-distance addition layer L2 set in the back side in the depth direction with respect to the reference layer L1, and further set in the back side. In addition, a virtual image of the display target information appears to appear in at least one layer position of the long-distance addition layer L3. The position of the reference layer L1 is preset in the vicinity of the focal point of the Fresnel lens 12 depending on the arrangement configuration of the optical components. As will be described later, the right-eye image and the left-eye image of the display target information displayed at the position of the reference layer L1 have no parallax. Therefore, the virtual image that appears to emerge at the position of the reference layer L1 is not blurred and can be easily recognized by the driver 15.

In the description, it is referred to as a layer, but an object does not exist, and a position where display target information appears is merely called a layer figuratively. The position of the reference layer L1 is the “reference position”, and the positions of the short-distance addition layer L2 and the long-distance addition layer L3 are “additional positions”.

FIG. 3 is a diagram for explaining the principle of displaying the display target information in a three-dimensional manner.
The display control device 1 displays the image for the right eye IR and the image for the left eye IL on the 3D liquid crystal display 11 and reflects them on the half mirror 13, thereby allowing the driver 15 to visually recognize the image three-dimensionally. The display position of the virtual image V in the depth direction is changed by changing the parallax by changing the interval between the right-eye image IR and the left-eye image IL displayed on the 3D liquid crystal display 11.

For example, as shown in FIG. 3A, when a small amount of parallax exists between the right-eye image IR and the left-eye image IL on the 3D liquid crystal display 11 (that is, the right-eye image IR and the left-eye image). If the display image is slightly shifted from the display image IL), the virtual image V of the display target information floats at the position of the short-distance addition layer L2 and appears three-dimensional (that is, three-dimensional). Further, as shown in FIG. 3B, if there is a large parallax between the right-eye image IR and the left-eye image IL on the 3D liquid crystal display 11, that is, the right-eye image IR and the left-eye image When the image IL is displayed with a large deviation), the virtual image V floats at the position of the long-distance addition layer L3 and looks three-dimensional.
On the other hand, as shown in FIG. 3C, when there is no parallax between the right-eye image IR and the left-eye image IL on the 3D liquid crystal display 11 (that is, the right-eye image IR and the left-eye image). When the image is superimposed on IL), a planar (that is, two-dimensional) virtual image V appears to float on the reference layer L1.
That is, the virtual image that appears in the reference layer L1 is based on an image having no parallax between the right-eye image IR and the left-eye image IL on the 3D liquid crystal display 11, and is therefore a high-definition virtual image. And it becomes a two-dimensional virtual image.
On the other hand, the virtual image that appears in the short-distance addition layer L2 and the long-distance addition layer L3 is based on an image having parallax between the right-eye image IR and the left-eye image IL on the 3D liquid crystal display 11. Although not as fine as the virtual image of the reference layer L1, it becomes a three-dimensional virtual image. Further, by adjusting the parallax between the right-eye image IR and the left-eye image IL on the 3D liquid crystal display 11, a floating virtual image is displayed on either the short-distance addition layer L2 or the long-distance addition layer L3. You can change what you do.

FIG. 4 is a diagram illustrating the types of display target information. The display target information is divided into vehicle information and additional information depending on the type of information. The vehicle information is information about the vehicle such as vehicle speed, meter display, and fuel remaining amount. The additional information is information other than information related to the vehicle, such as route guidance arrows, road signs, speed limits, traffic jam information, warnings, and e-mails.
FIG. 4A is an image diagram when the vehicle front is viewed from the viewpoint of the driver 15 through the half mirror 13 while traveling on the road. In the first embodiment, the vehicle information is displayed on the reference layer L1, and the additional information is displayed on the short-distance addition layer L2 or the long-distance addition layer L3 in principle according to the driving situation or the like.
For example, when vehicle speed is displayed as vehicle information and a guidance arrow and warning are displayed as additional information, as shown in FIG. 4B, vehicle information is obtained when the estimated focal position of the driver 15 is a short distance. The vehicle speed 20 is displayed on the reference layer L1, and a guide arrow 21 that is additional information is displayed on the short-distance addition layer L2. Further, depending on the driving situation, that is, when the estimated focus position of the driver 15 is a long distance, the guide arrow 21 may be displayed on the long distance addition layer L3 as shown in FIG. 4C. . Furthermore, although the additional information is displayed on the short-distance additional layer L2 or the long-distance additional layer L3 in principle, the warning 22 is displayed on the reference layer L1 even if it is additional information. Details of which information is displayed on which layer will be described later.

FIG. 5 is a graph showing the relationship between the focus position of the driver 15 and the vehicle speed. Here, the focal position means the position in the depth direction where the driver 15 is looking. When the vehicle speed is slow, the focal position is close (front side in the depth direction), and when the vehicle speed is fast. There is a tendency that the focal position is far away (the far side in the depth direction). For example, as shown by the solid line, when it is assumed that the focus position of the driver 15 and the vehicle speed have a linear function relationship, the short-distance addition layer L2 is set at a position in the depth direction of 3 m from the driver 15, and the position of 10 m is set. A long-distance addition layer L3 is set. 3m of the short-distance addition layer L2 is a focus position that the driver 15 will watch while driving at 30 km / h, and 10 m of the long-distance addition layer L3 is watched by the driver 15 while driving at 100 km / h. It will be the focal position. Further, the reference layer L1 is set near the focal point of the Fresnel lens 12, for example, at a position of 2 to 2.5 m, in front of the short distance addition layer L2 in the depth direction.
In addition, the position of each layer is an example and is not limited to this. Further, as indicated by a broken line, the position of each layer may be set on the assumption that the focal position of the driver 15 and the vehicle speed are in a logarithmic function.

Next, the display control apparatus 1 will be described.
The display control device 1 is composed of a CPU (Central Processing Unit) (not shown), and when this CPU executes a program stored in an internal memory, an information acquisition unit 7, an operation state estimation unit 8, a display target Functions as the information generation unit 9 and the display position determination unit 10 are realized.

The information acquisition unit 7 acquires various types of information from in-vehicle devices such as the vehicle speed sensor 2, the GPS sensor 3, the operation mode acquisition unit 4, the object detection sensor 5, and the navigation device 6. The information acquired by the information acquisition unit 7 is used to estimate the driving situation in the driving situation estimation unit 8 described later. Further, the information acquired by the information acquisition unit 7 may be used as display target information displayed on the HUD 14.

The vehicle speed sensor 2 is a sensor that detects the vehicle speed.
The GPS sensor 3 receives a GPS satellite signal and specifies the position of the vehicle.
The driving mode acquisition unit 4 acquires the driving mode selected by the driver 15 (for example, a relatively low speed city riding mode or a relatively high speed sports mode). The driver 15 selects a desired operation mode by operating an operation mode selection button or the like installed on a handle or a shift lever. Alternatively, the navigation device 6 may accept the selection of the driving mode from the driver 15.
The object detection sensor 5 detects the presence or absence of a visual object such as a person and a vehicle ahead of the host vehicle, and the position of the visual object. As the object detection sensor 5, for example, a stereo camera or a radar that senses the outside of the vehicle is used. The visual recognition object is an object that the driver 15 should be careful while driving, such as a pedestrian and a car.
In addition to the map data, the navigation device 6 outputs information such as route guidance arrows, road signs, speed limits, traffic jam information, and warnings to the information acquisition unit 7 as necessary.

The driving situation estimation unit 8 estimates the driving situation of the vehicle based on the information that the information acquisition unit 7 can estimate the vehicle speed acquired from the in-vehicle device, and determines whether the driver's focal position is a long distance or a short distance. . The information capable of estimating the vehicle speed includes the vehicle speed, the driving mode, and the road type included in the map data.
Details of the driving situation estimation unit 8 will be described later.

The display target information generation unit 9 acquires vehicle information such as vehicle speed, meter display, and fuel remaining amount, and additional information such as guidance arrows, road signs, speed limits, traffic jam information, warnings, and e-mails from in-vehicle devices. The display target information is generated originally. Vehicle information and additional information are acquired from the vehicle speed sensor 2, the GPS sensor 3, the driving mode acquisition unit 4, the object detection sensor 5, and the navigation device 6 via the information acquisition unit 7. Additional information such as an audio song name can also be acquired from a device (for example, an audio device). The description here is an example, and does not limit the type of information and the type of in-vehicle equipment.
The display target information includes, for example, a character string such as the vehicle speed 20 shown in FIG. 4 and graphics such as a guide arrow 21 and a warning 22.

The display position determination unit 10 determines a layer for displaying the display target information based on the display target information generated by the display target information generation unit 9 and the focal position of the driver 15 estimated by the driving situation estimation unit 8. A right-eye image and a left-eye image that match the position are generated.
Details of the display position determination unit 10 will be described later.

Next, the operation of the display control device 1 will be described in detail.
First, the operation of the driving situation estimation unit 8 will be described according to the flowchart shown in FIG. Here, the reference layer L1 is set at a position of 2 to 2.5 m from the driver 15 in the depth direction ahead of the vehicle, the short-distance addition layer L2 is set at a position of 3 m, and the long-distance addition layer L3 is set at a position of 10 m. Is set. In accordance with this setting, the driving situation estimation unit 8 regards the focal position 3m of the driver 15 as a short distance and 10m as a long distance.
Prior to the operation of the driving situation estimation unit 8, the information acquisition unit 7 acquires the vehicle speed from the vehicle speed sensor 2, acquires the vehicle position from the GPS sensor 3, and operates from the driving mode acquisition unit 4 in the driving mode (relatively slow city Riding mode or relatively high-speed sports mode), the presence / absence of the visual recognition object in front of the vehicle and the position of the visual recognition object are obtained from the object detection sensor 5, and the map data around the vehicle position from the navigation device 6 To get.

The driving state estimation unit 8 determines whether or not the host vehicle is traveling on the highway based on the information acquired by the information acquisition unit 7 (step ST1). Here, the driving situation estimation unit 8 determines the type of road on which the host vehicle is traveling based on the host vehicle position of the GPS sensor 3 and the map data of the navigation device 6. The driving state estimation unit 8 proceeds to step ST2 when the road type is a highway, and proceeds to step ST3 when the road type is a general road.

When it is determined that the host vehicle is traveling on the highway (step ST1 “YES”), the driving state estimation unit 8 regards the vehicle 15 as traveling at a relatively high speed when traveling on the highway, The focal position is estimated to be a long distance (step ST2).
On the other hand, when it is determined that the host vehicle is traveling on a general road (step ST1 “NO”), the driving state estimation unit 8 determines whether or not the driving mode is selected (step ST3). The driving state estimation unit 8 proceeds to step ST4 when the driving mode is not selected by the driver 15, and proceeds to step ST7 when the driving mode is selected.

When it is determined that the driving mode is not selected (step ST3 “NO”), the driving state estimation unit 8 determines the driving state based on the vehicle speed instead of the driving mode. The driving state estimation unit 8 compares the vehicle speed acquired by the vehicle speed sensor 2 with a predetermined threshold value (step ST4), and proceeds to step ST6 when the vehicle speed is equal to or higher than the threshold value, and proceeds to step ST6 when the vehicle speed is lower than the threshold value. Proceed to ST5. Here, the threshold value is a vehicle speed for estimating whether the focal position is at a long distance or a short distance. As shown in FIG. 5, when the focal position and the vehicle speed are in a linear function, the vehicle speed is 100 km / h when the focal position is a long distance of 10 m, and the vehicle speed is 30 km / h when the focal position is a short distance of 3 m. As the threshold value, a value larger than 30 km / h and smaller than 100 km / h is used. For example, 60 km / h is used. This is because the ordinary roads in Japan usually do not exceed 60 km / h. This threshold value can be freely set in consideration of the circumstances of each country or region, and may be changed according to the circumstances.

When the vehicle speed is smaller than the threshold (step ST4 “NO”), the driving state estimation unit 8 considers that the vehicle is traveling at a relatively low speed, and estimates the focal position of the driver 15 as a short distance (step ST5).
On the other hand, when the vehicle speed is equal to or higher than the threshold value (step ST4 “YES”), the driving state estimation unit 8 considers that the vehicle is traveling at a relatively high speed, and estimates the focal position of the driver 15 as a long distance (step ST6). .

On the other hand, when it is determined that the driving mode is selected (step ST3 “YES”), the driving state estimation unit 8 determines whether or not the driving mode selected by the driver 15 is the sports mode (step ST7). . The driving situation estimation unit 8 proceeds to step ST9 when the sports mode is selected. Since it is presumed that the vehicle is traveling at a relatively high speed when the sport mode is selected (step ST7 “YES”), the driving situation estimation unit 8 estimates the focal position of the driver 15 as a long distance (step ST9). On the other hand, when the sport mode is not selected, that is, when the city riding mode is selected (step ST7 “NO”), the driving state estimating unit 8 regards that the vehicle is traveling at a relatively low speed, and the driver 15 Is estimated as a short distance (step ST8).

Subsequently, the driving state estimation unit 8 determines whether or not a visual object is detected within a predetermined distance in front of the vehicle by the object detection sensor 5 (step ST10). The driving state estimation unit 8 proceeds to step ST11 when the visual recognition object is not detected, and proceeds to step ST12 when the visual recognition object is detected. Here, the predetermined distance is a position (10 m in this example) where the long-distance addition layer L3 is set.

If no visual recognition object is detected in front of the vehicle (step ST10 “NO”), the driving state estimation unit 8 determines whether or not there is a curve within a predetermined distance in front of the vehicle (step ST11). The predetermined distance is a position (10 m in this example) where the long-distance addition layer L3 is set as described above. The driving situation estimation unit 8 selects, for example, road information currently running from the map data of the navigation device 6 and determines whether there is a curve ahead of the vehicle. The driving state estimation unit 8 proceeds to step ST12 when there is a curve ahead, and ends the process when there is no curve.

When a visual recognition object or a curve is detected in front of the vehicle (step ST10 “YES” or step ST11 “YES”), it is assumed that the focus position of the driver 15 is in the vicinity of the vehicle. Therefore, the driving situation estimation unit 8 considers that the driver 15 is looking in the vicinity of the vehicle, and estimates the focal position as a short distance (step ST12).
Note that the driving situation estimation unit 8 prioritizes step ST12 and changes the estimated focal position to a short distance even when the focal position is estimated to be a long distance based on the driving situation in steps ST2, ST6, ST9. .

Through the above processing, it is estimated whether the focus position of the driver 15 is at a long distance (10 m in this example) or a short distance (3 m in this example).

After the driving situation estimation unit 8 estimates the focus position of the driver 15, the display target information generation unit 9 subsequently generates display target information for display on the HUD 14. Thereafter, the display position determination unit 10 displays the display target information based on the display target information generated by the display target information generation unit 9 and the focal position of the driver 15 estimated by the driving situation estimation unit 8. The position of the direction, that is, the layer is determined, and a right eye image and a left eye image for display are created.

Next, the operation of the display position determination unit 10 will be described according to the flowchart shown in FIG.
The display position determination unit 10 first determines whether the display target information generated by the display target information generation unit 9 is vehicle information (step ST21). The display position determination unit 10 proceeds to step ST22 when the display target information is vehicle information such as vehicle speed, meter display, and fuel remaining amount. Conversely, the display position determination unit 10 is not vehicle information, that is, guidance arrows, road signs, speed limits, traffic jam information, If it is additional information such as a warning or e-mail, the process proceeds to step ST23.
When the display target information is vehicle information (step ST21 “YES”), the display position determination unit 10 displays the vehicle information as the display target information on the reference layer L1 whose position in the depth direction is fixed. A video, that is, a right-eye image and a left-eye image without parallax are created (step ST22), and the process ends.

On the other hand, when the display target information is not vehicle information (step ST21 “NO”), the display position determination unit 10 determines whether or not the additional information that is the display target information is a warning (step ST23). The display position determination unit 10 proceeds to step ST24 when the additional information is not a warning, and proceeds to step ST26 when the additional information is a warning.

If the additional information is not a warning (“NO” in step ST23), the display position determination unit 10 determines whether or not the additional information that is display target information is high-resolution information (step ST24). The high resolution information is additional information whose resolution required for display is equal to or higher than a predetermined threshold, and includes, for example, character information such as e-mail and audio song names, and fine graphics images such as meter images. The display position determination unit 10 proceeds to step ST25 when the additional information is not high resolution information, and proceeds to step ST26 when the additional information is high resolution information.

When the additional information is not high resolution information (step ST24 “NO”), the display position determination unit 10 displays the additional information on the additional layer corresponding to the focal position of the driver 15 estimated by the driving situation estimation unit 8. 3D video, that is, a right-eye image and a left-eye image with parallax are created (step ST25), and the process is terminated. When the driver 15 estimates that the focus position of the driver 15 is a short distance in the driving situation estimation unit 8, the display position determination unit 10 creates a three-dimensional image for displaying additional information on the short-distance addition layer L2 3 meters ahead. . On the other hand, when the focal position is estimated to be a long distance, the display position determination unit 10 creates a 3D image for displaying additional information on the long distance addition layer L3 10 meters ahead.

When the additional information is warning or high-resolution information (step ST23 “YES” or step ST24 “YES”), the display position determination unit 10 displays a two-dimensional image for displaying the warning or high-resolution information on the reference layer L1. Create (step ST26), and the process ends.

Finally, the image created by the display position determination unit 10 is sent to the 3D liquid crystal display 11 and displayed there, so that display target information is presented to the driver 15.
With the above processing, the additional information is displayed on the long-distance addition layer L3 when the driver's 15 focal position is a long distance, and the additional information is displayed on the short-distance addition layer L2 when the driver's 15 focal position is a short distance. Therefore, the difference between the focus position of the driver 15 and the positions in the depth direction of the additional layers L2 and L3 can be suppressed. As a result, the amount of line-of-sight movement (congestion fluctuation) in the depth direction of the driver 15 can be reduced, and fatigue during visual recognition can be suppressed.

In the above description, the display position of the additional layer is set in two steps, short distance and long distance, but it may be set in three steps or more. In FIG. 7, the operation has been described using one piece of display target information, but this process is performed for each piece of display target information. That is, in the case shown in FIG. 4, it is performed for each of the vehicle speed 20, the guide arrow 21, and the warning 22 that are display target information.

As described above, according to the first embodiment, the display control device 1 displays the driving status estimation unit 8 that estimates the focal position of the driver 15 based on the driving status of the vehicle and the display target information generation unit 9 that generates the display. The vehicle information in the target information is displayed at the position of the reference layer L1 whose position in the depth direction is determined in advance, and the additional information in the display target information is displayed in the depth direction from the position of the reference layer L1 in the depth direction. The focal position of the driver 15 estimated by the driving situation estimation unit 8 is displayed at the position of the short-distance addition layer L2 or the long-distance addition layer L3, which is the back side of the vehicle. Accordingly, the display position determination unit 10 that changes to the short-distance addition layer L2 or the long-distance addition layer L3 is provided. That is, since the vehicle information is displayed on the reference layer L1 and the additional information is displayed on the short-distance addition layer L2 or the long-distance addition layer L3, the display can be divided according to the type of information. In addition, since the vehicle information is displayed on the reference layer L1 in which a two-dimensional virtual image emerges based on an image without parallax, the driver 15 can easily recognize the vehicle regardless of the type of information. Furthermore, since the display position of the additional information is changed according to the focal position of the driver 15, the amount of line-of-sight movement in the depth direction of the driver 15 can be reduced, and fluctuations in congestion can be suppressed.

Further, according to the first embodiment, the driving situation estimation unit 8 estimates the focal position of the driver 15 based on information (vehicle speed, driving mode, and road type included in the map data) that can estimate the vehicle speed. It was configured to be. For this reason, the camera for driver | operator eyes | visual_axis monitoring required by the invention which concerns on the said patent document 2 becomes unnecessary.
In the first embodiment, in order to prevent layers from switching frequently, an example in which priority is given to information that can estimate the vehicle speed (road type, driving mode or vehicle speed from the highest priority) is shown. . That is, when it is determined that the host vehicle is traveling on the highway (step ST1 “YES”), the driving state estimation unit 8 estimates the focal position as a long distance without confirming the driving mode and the vehicle speed. Similarly, when it is determined that the host vehicle is traveling on a general road (“NO” in step ST1), the driving state estimation unit 8 estimates the focal position in the driving mode (step ST3). In this case, the vehicle speed is confirmed. I do not.
That is, by assigning priorities to information that can estimate the vehicle speed, the layer is not switched if the road type or the driving mode does not change even if the vehicle speed frequently fluctuates the threshold value 60 km / h. For this reason, layer switching can be made stable. The priorities are merely examples. The priority order may be determined in advance or may be set freely by the driver. Information other than the road type, driving mode, or vehicle speed may be used as information that can estimate the vehicle speed. Moreover, you may give priority to such information.
On the other hand, in the example of FIG. 6, the vehicle speed, the driving mode, and the road type are used with priority given as information that can estimate the vehicle speed, but at least one may be used. Further, a configuration in which the user sets which information is used may be used. For example, when the driver desires to quickly switch the layer in conjunction with his / her focal position, the vehicle speed of the vehicle speed sensor 2 may be used as information capable of estimating the vehicle speed. In this case, the driver's focal position also changes according to the vehicle speed that changes from moment to moment, and it is possible to quickly switch to a layer that matches this focal position. Alternatively, when the vehicle speed of the vehicle speed sensor 2 is not used as the information that can estimate the vehicle speed, and the driving mode or the road type is used, the approximate focus position of the driver 15 can be estimated. When traveling at a vehicle speed near the threshold for determining the short-distance addition layer L2 and the long-distance addition layer L3, the layer is frequently switched when the vehicle speed of the vehicle speed sensor 2 is used. No switching occurs.

Further, according to the first embodiment, when there is a visual recognition object in front of the vehicle, or when there is a curve in front of the road on which the vehicle travels, the driving situation estimation unit 8 sets the current driving situation. The focal position estimated on the basis of the estimated focal position is changed to a position closer to the driver 15 than the estimated focal position. When there is a visual target such as a pedestrian or when driving on a curve, the focus position of the driver 15 is assumed to be close, so the display position of the additional information is set to the near side in the depth direction. The amount of line-of-sight movement in the depth direction of the driver 15 can be reduced.

Further, according to the first embodiment, the display position determination unit 10 is configured to display the additional information on the reference layer L1 when the additional information is a warning. A short-distance addition layer set on the far side in the depth direction with respect to the reference layer L1 by displaying a warning on the reference layer L1 that is set closest to the driver 15 and can display a high-resolution virtual image As compared with the case of displaying on L2 or the long-distance addition layer L3, it becomes easier to recognize warnings that should not be overlooked.

Further, according to the first embodiment, the display position determination unit 10 is configured to display the additional information on the reference layer L1 when the resolution required for displaying the additional information is equal to or higher than a predetermined threshold. . Character information such as e-mails and audio song names is complicated in shape and requires high resolution for display. By displaying such information as a high-resolution virtual image of the reference layer L1 displayed based on an image without parallax, a short-distance addition layer L2 or a long-distance addition layer L3 displayed based on an image with parallax Readability can be improved compared to the case of displaying on the screen.

Embodiment 2. FIG.
Since the configuration of the display control apparatus 1 according to the second embodiment is the same as that of FIG. 1 in the drawing, FIG. 1 is used below.
The difference between the display control device 1 according to the second embodiment and the first embodiment is in the operation of the driving situation estimation unit 8. In the driving state estimation unit 8 of the first embodiment, the position where the additional information is displayed is the position of the short-distance addition layer L2 or the position of the long-distance addition layer L3. In addition to this, the driving state estimation unit 8 of the second embodiment can continuously change the position for displaying the additional information according to the vehicle speed.

FIG. 8 is a flowchart showing the operation of the driving situation estimation unit 8 in the second embodiment. Hereinafter, the operation of the driving situation estimation unit 8 will be described with reference to FIG.
FIG. 8 differs from FIG. 6 in the first embodiment in that step ST13 is performed instead of steps ST4 to ST6 in FIG.
That is, when the driving mode is not selected in step ST3 (step ST3 “NO”), the driving state estimating unit 8 continuously changes the focal position of the driver 15 according to the vehicle speed of the vehicle speed sensor 2 (step ST3). ST13). For example, as shown in FIG. 5, when the focal position and the vehicle speed are in a linear function, the driving situation estimation unit 8 sets the focal position to 2 m when the vehicle speed is 20 km / h, 3 m when the vehicle speed is 30 km / h, The focal position is estimated to be 6 m at 60 km / h, and 10 m at 100 km / h. Thus, in the second embodiment, the focal position is continuously changed according to the vehicle speed.

FIG. 9 is a schematic diagram illustrating the reference layer L1 and the additional layer L21 according to the second embodiment. Similar to the first embodiment, the display position determination unit 10 displays the vehicle information such as the vehicle speed 20 and the warning 22 and the high resolution information among the additional information at the position of the reference layer L1 where the position in the depth direction is fixed. Create a 2D image to do.
On the other hand, the display position determination unit 10 displays additional information (excluding warning and high resolution information) such as the guidance arrow 21 on the additional layer L21 corresponding to the focal position of the driver 15 estimated by the driving situation estimation unit 8. Create 3D video for Depending on the focal position estimated by the driving situation estimation unit 8, the display position determination unit 10 adjusts the interval between the right-eye image and the left-eye image as additional information to change the parallax, thereby making the virtual image appear to float. The position of the additional layer L21 is changed in the depth direction. The moving range in the depth direction of the additional layer L21 can be arbitrarily set, and is, for example, a range from the reference layer L1 to the long-distance additional layer L3.

For example, when the focal position is estimated to be a long distance in step ST2 or step ST9 in FIG. 8, the display position determination unit 10 sets the additional layer L21 to a position at a long distance (for example, 10 m) and adds it to the position. Create 3D images to display information. When the focal position is estimated to be a short distance in step ST8 or step ST12 in FIG. 8, the display position determination unit 10 sets the additional layer L21 at a short distance (for example, 3 m), and adds additional information to the position. Create a 3D image for display. When the focal position corresponding to the vehicle speed is estimated in step ST13 of FIG. 8, the display position determining unit 10 sets the additional layer L21 to the focal position (for example, 6 m when the vehicle speed is 60 km / h), and at that position. Create a 3D image to display additional information.

As described above, according to the second embodiment, the driving situation estimation unit 8 is configured to change the position of the additional layer L21 that displays additional information to the far side in the depth direction as the vehicle speed increases. Therefore, the focus position of the driver 15 can be estimated more finely in the second embodiment than in the first embodiment. Since the display position of the additional layer is continuously changed in accordance with the estimated focus position of the driver 15, there is an effect that the amount of line-of-sight movement in the depth direction of the driver 15 can be further reduced.

Embodiment 3 FIG.
FIG. 10 is a block diagram illustrating a configuration example of the display control device 1 according to the third embodiment. 10, parts that are the same as or equivalent to those in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted.
The difference between the display control device 1 according to the third embodiment and the first embodiment is that an estimated arrival time estimation unit 30 is added. Further, with the addition of the estimated arrival time estimation unit 30, the operations of the information acquisition unit 7 and the display position determination unit 10 are also different.

In the third embodiment, the information acquisition unit 7 acquires guide point information from the navigation device 6. The guidance point is, for example, a point set as the destination or waypoint of the host vehicle. The guide point information is, for example, destination facility information (facility location, icons representing facilities, etc.) or transit location facility information (facility locations, icons representing facilities, etc.), which is one of additional information. It is.
The driving situation estimation unit 8 performs the same operation as in the first embodiment.
Thereafter, the estimated arrival time estimation unit 30 uses the vehicle position acquired by the information acquisition unit 7 from the GPS sensor 3, the map data acquired from the navigation device 6, and the guide point information, from the host vehicle to the guide point. Find the distance. The estimated arrival time estimation unit 30 divides the obtained distance by the vehicle speed acquired from the vehicle speed sensor 2 by the information acquisition unit 7 to estimate the time of arrival at the guidance point, and the time required to arrive at the guidance point Is estimated.
The estimated arrival time estimation unit 30 may acquire information on the estimated arrival time from the navigation device 6 instead of estimating the estimated arrival time by itself.

After the estimated arrival time estimation unit 30 estimates the time required for arrival, the display target information generation unit 9 generates display target information as in the first embodiment. At that time, the display target information generation unit 9 generates display target information such as an icon representing a facility that is a destination or waypoint from the guide point information.
Thereafter, the display position determination unit 10 determines the time required for arrival estimated by the estimated arrival time estimation unit 30, the display target information generated by the display target information generation unit 9, and the focus of the driver 15 estimated by the driving situation estimation unit 8. The position in the depth direction for displaying the display target information is determined using the position.

FIG. 11 is a schematic diagram illustrating the reference layer L1, the short-distance addition layer L2, the long-distance addition layer L3, and the guide point addition layer L31 according to the third embodiment. In the third embodiment, a guide point additional layer L31 that can change the position in the depth direction according to the time required for arrival estimated by the estimated arrival time estimation unit 30 is added. The movement range in the depth direction of the guidance point additional layer L31 can be arbitrarily set, and is, for example, a range from the long-distance addition layer L3 to the short-distance addition layer L2. The display target information of the guide point information such as the icon 31 representing the facility that is the destination or waypoint is displayed on the guide point additional layer L31.

FIG. 12 is a flowchart showing the operation of the display position determination unit 10 according to the third embodiment.
12 differs from FIG. 7 of the first embodiment in that steps ST27 and ST28 are added.
In step ST27, the display position determination unit 10 determines whether the additional information is guidance point information. The display position determination unit 10 proceeds to step ST28 when the additional information is guidance point information, and proceeds to step ST25 when the additional information is not guidance point information.

When the additional information is guidance point information (step ST27 “YES”), the display position determination unit 10 displays guidance point information based on the time required for arrival estimated by the estimated arrival time estimation unit 30. A position in the depth direction of the additional layer L31 is set, and a 3D image for displaying the guide point information at the position is created (step ST28).

For example, when the estimated arrival time at the guidance point is one hour later, the guidance point additional layer L31 is displayed at the same position as the long-distance addition layer L3. As the vehicle starts to travel and the estimated arrival time approaches, the guidance point additional layer L31 moves to the near side. When the estimated arrival time is 30 minutes later, the guidance point additional layer L31 is added to the long-distance addition layer L3. It is in the middle position of layer L2. Upon arrival at the guide point, the guide point additional layer L31 comes to the same position as the short-distance additional layer L2. Since the virtual image of the guidance point information approaches as the estimated arrival time approaches, the driver 15 can intuitively grasp the time until the arrival at the guidance point.
As described above, the display position determination unit 10 continuously changes the display position of the guide point information according to the estimated arrival time. Note that the display position of the guidance point information may be changed in stages to the position of the long-distance addition layer L3, the intermediate position between the long-distance addition layer L3 and the long-distance addition layer L3, and the position of the short-distance addition layer L2.

In the above description, the position of the guide point additional layer L31 is changed according to the time from the current location to the guide point. Instead, the guide point additional layer L31 is changed according to the distance from the current location to the guide point. The position may be changed.
Alternatively, when the guidance point is indicated by an arrow or the like in the guidance point addition layer L31, the position of the guidance point addition layer L31 may be changed according to the straight line distance from the current location to the guidance point.

Note that the guide point information need not always be displayed on the guide point additional layer L31. Therefore, the display position determination unit 10 may start displaying the guidance point information on the guidance point additional layer L31, for example, a predetermined time before the host vehicle reaches the guidance point (for example, 10 minutes before).

In the above description, the case where the configuration of the third embodiment is combined with the configuration of the first embodiment is taken as an example, but the configuration may be combined with the configuration of the second embodiment.

As described above, according to the third embodiment, the display control device 1 is configured to include the estimated arrival time estimation unit 30 that estimates the time until arrival at the guidance point. When the additional information is information related to the guide point, the display position determination unit 10 is configured to change the guide point additional layer L31 for displaying the additional information according to the time estimated by the estimated arrival time estimation unit 30. . For this reason, the driver 15 can intuitively grasp the time until arrival at the guidance point based on the display position of the guidance point information in the depth direction.

In the present invention, within the scope of the invention, free combinations of the respective embodiments, modification of arbitrary components of the respective embodiments, or omission of arbitrary components of the respective embodiments are possible.

Since the display control device according to the present invention has different display positions according to the type of information, it is suitable for use in a head-up display mounted on an automobile or the like having a large amount of information to be displayed.

1 display control device, 2 vehicle speed sensor, 3 GPS sensor, 4 driving mode acquisition unit, 5 object detection sensor, 6 navigation device, 7 information acquisition unit, 8 driving status estimation unit, 9 display target information generation unit, 10 display position Judgment part, 11 3D liquid crystal display, 12 Fresnel lens, 13 half mirror, 14 HUD, 15 driver, 20 vehicle speed, 21 guide arrow, 22 warning, 31 icon, L1 reference layer, L2 short distance addition layer, L3 long distance addition Layer, L21 additional layer, L31 additional point guide layer, IR right eye image, IL left eye image, V virtual image.

Claims

A display control device that controls a head-up display that displays a virtual image of display target information in front of the driver,
A driving situation estimation unit that estimates a focal position of the driver based on a driving situation of the vehicle;
The vehicle information related to the vehicle in the display target information is displayed at a reference position in which a depth direction from the driver to the front is determined in advance, and additional information other than the vehicle information in the display target information is The focus of the driver whose position in the depth direction is farther in the depth direction than the reference position and is displayed at an additional position where the position can be changed, and the additional position is estimated by the driving situation estimation unit A display control apparatus comprising: a display position determination unit that changes according to a position.
The display control apparatus according to claim 1, wherein the driving state estimation unit estimates a focus position of the driver based on information capable of estimating a vehicle speed.
3. The display control apparatus according to claim 2, wherein the information capable of estimating the vehicle speed is a driving mode.
3. The display control apparatus according to claim 2, wherein the driving state estimation unit changes the additional position to the far side in the depth direction when the vehicle speed is high compared to when the vehicle speed is low.
When there is a visual recognition object in front of the vehicle, the driving situation estimation unit changes the focal position estimated based on the current driving situation to a position closer to the driver than the estimated focal position. The display control device according to claim 4, characterized in that:
When there is a curve ahead of the road on which the vehicle travels, the driving situation estimation unit changes the focal position estimated based on the current driving situation to a position closer to the driver than the estimated focal position. The display control apparatus according to claim 4.
The display control apparatus according to claim 1, wherein the display position determination unit displays the additional information at the reference position when the additional information is a warning.
The display control according to claim 1, wherein the display position determination unit displays the additional information at the reference position when a resolution required for displaying the additional information is equal to or higher than a predetermined threshold. apparatus.
It has an estimated arrival time estimation unit that estimates the time until it arrives at the guide point,
When the additional information is information on the guide point, the display position determination unit changes the additional position for displaying the additional information according to the time estimated by the estimated arrival time estimation unit. The display control apparatus according to claim 1.