JP2006330360A - Information display for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform display without sense of incongruity, when displaying a 3-dimensional map image in which visibility is raised in the upper side of a front visual field of a vehicle driver. <P>SOLUTION: A display control means 1 converts a map screen which is shown by a road map data obtained from a map information memory 5 to a 3-dimensional map screen composed of a translucent image in a form which is looked up from a reference viewing point set under a road surface and outputs it to a head up display (HUD) 2. In response to this, the HUD 2 displays the 3-dimensional map screen composed of the translucent image in the form which is looked up from the reference viewing point under the road surface, in the upper side of the front visual field of the vehicle driver, especially in the upper side corresponding to a front of a steering wheel in a windshield of a vehicle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information display device for a vehicle that displays a three-dimensional map screen for driving assistance in an upper region in a front view of a vehicle driver.

In recent years, by providing a head-up display that displays a map screen for car navigation on the windshield of a vehicle, means for reducing the amount of movement of the driver's line of sight and improving the visibility of the map screen have been provided. (For example, refer to Patent Document 1). On the other hand, the map screen is set in advance and displayed as a three-dimensional image from the viewpoint altitude, making it easy to visually grasp the road connection status and improving the sense of realism. (For example, refer to Patent Document 2).
Japanese Patent Laid-Open No. 10-311732 Japanese Patent No. 3250554

  When displaying the map screen on the windshield of the vehicle, it is desirable to set the display area so that it does not hinder the field of view ahead of the vehicle and the amount of movement of the driver's line of sight is as small as possible. Therefore, it is conceivable to display a map screen in an upper area (an area where the visibility of road conditions ahead of the vehicle is not adversely affected) in the front view of the vehicle driver. However, when the map screen is displayed at such a position, that is, at a position where the vehicle driver's line of sight faces upward, the map screen is previously set for the purpose of making it easy to visually grasp the connection status of the road. When set and displayed as a three-dimensional image from the viewpoint altitude, when the vehicle driver checks the map screen, the map screen looks down from the viewpoint altitude even though the line of sight is facing upward. Since it will be displayed in the form, the driver will feel uncomfortable and the visibility of the map screen will deteriorate against the original purpose.

  The present invention has been made in view of the above circumstances, and an object thereof is to display a 3D map image with improved visibility in an upper region in a vehicle driver's front field of vision without a sense of incongruity. An object of the present invention is to provide a vehicle display device.

  According to the first aspect of the present invention, the display control means converts the map screen indicated by the road map data around the current vehicle position into a three-dimensional map screen in a form of looking up from the reference viewpoint set below the road surface. The changed image data for projection is created and output to the image projection means. Then, the image projection means projects an image corresponding to the projection image data, that is, a three-dimensional map screen in a form looked up from the reference viewpoint set below the road surface, to an upper region in the vehicle driver's forward visual field. Will come to do. The 3D map screen projected onto such an area eliminates the possibility of obstructing the vehicle driver's field of view, and when the vehicle driver checks the displayed (projected) 3D map screen, Although the line of sight is directed upward, the 3D map screen is also looked up from the reference viewpoint set below the road surface, so that there is no possibility that the driver will feel uncomfortable.

  According to the second aspect of the present invention, the information acquisition means is present on a road around the current position of the own vehicle among moving bodies other than the own vehicle (a concept that includes not only vehicles but also humans). The mobile body information indicating the position of the mobile body to be acquired is acquired in real time or periodically. In addition, the display control means creates the three-dimensional map screen (three-dimensional map screen in a form looked up from a reference viewpoint set below the road surface) as a translucent image, and the moving object acquired as described above The projection image data in a state in which a figure indicating the position of the moving body indicated by the information is drawn on the three-dimensional map screen is output. Therefore, on the three-dimensional map screen displayed by the image projecting means, a figure showing the existence of the moving body is clearly displayed in a form that is transmitted through the map screen that is a translucent image. It is possible to easily grasp the positional relationship between the vehicle and the host vehicle, which is beneficial for safe driving of the vehicle.

  According to the third aspect of the present invention, the shape displayed to indicate the position of the moving body on the three-dimensional map screen is in a state in which the type of the corresponding moving body can be specified. On the other hand, at the same time as grasping the positional relationship between the host vehicle and the moving body, the type of the moving body (for example, whether it is a vehicle or a human) can be easily grasped. It becomes more useful.

  According to the invention described in claim 4, since the figure displayed as described above on the three-dimensional map screen includes the information indicating the moving direction of the moving body, the vehicle driver side The moving direction of the body can be grasped at the same time, which is further useful for safe driving of the vehicle.

  According to the fifth aspect of the present invention, as described above, when the figure indicating the position of the moving object is displayed on the three-dimensional map screen, the intersection existing at the destination of the host vehicle is specified by the specifying means. In this case, the display control means creates projection image data in a form in which the center of the designated intersection is located at the center of the image projection area (map screen display area) by the image projection means. In other words, if the center of the intersection existing at the destination of the host vehicle is deviated from the center of the display area of the map screen, the other moving body is present at a position relatively close to the center of the intersection. Therefore, the moving object may not be displayed on the map screen. On the other hand, such a possibility can be excluded when the designated intersection is located at the center of the display area of the map screen as in the fifth aspect of the invention. This is beneficial for safe driving of the vehicle.

  According to the sixth aspect of the present invention, since a fixed object (such as a building) on the road is also displayed as a three-dimensional image on the three-dimensional map screen, the displayed map is displayed on the vehicle driver side. Based on the comparison between the screen and the actual scenery, it is possible to accurately grasp the exact position of the host vehicle and the surrounding situation. In addition, since the three-dimensional image of the fixed object is displayed as a semi-transparent image, even when a moving object is present behind the fixed object, the shape indicating the position of the moving object on the three-dimensional map screen is accurately displayed. It can be displayed.

  According to the seventh aspect of the present invention, when a fixed object on the road is displayed on the three-dimensional map screen as a semi-transparent three-dimensional image, the fixed object closer to the current vehicle position is drawn so that the light transmittance is higher. Therefore, the image displayed to indicate the position of the moving object on the 3D map screen can be recognized in a clearer state as it is relatively close to the own vehicle, and the vehicle is actually driven. Will be beneficial on.

  According to the eighth aspect of the present invention, when rendering based on the three-dimensional object data performed by the display control means, that is, when drawing data for a fixed object on the road is created, the vehicle is within a set distance range from the current position. Since the drawing data is created so that the light transmittance is high only for a fixed object, the amount of data processing related to the rendering can be reduced, so that the burden on the display control means can be reduced. Become.

  According to the ninth aspect of the present invention, when the fixed object on the road is displayed on the three-dimensional map screen as a semi-transparent three-dimensional image in the traveling state of the host vehicle, the fixed object that is farther from the current vehicle position transmits light. Since it is drawn so as to increase the degree, it is possible to prevent a vehicle driver who is viewing the 3D map screen from feeling that a fixed object suddenly appears nearby as the vehicle travels. become.

  According to the tenth aspect of the present invention, the operation of displaying the three-dimensional map screen in the region only when the vehicle driver's line-of-sight direction is directed to the upper region direction in the forward visual field (image projection operation by the image projection means). Since it is started, there is no possibility that the display operation is performed wastefully.

  According to the eleventh aspect of the present invention, when the vehicle driver's line-of-sight direction faces the display area direction of the three-dimensional map screen continues for a set time or longer, the image projection operation by the image projection means, that is, the three-dimensional Since the display operation of the map screen is interrupted, there is no possibility that the state in which confirmation of the forward field of view by the vehicle driver is neglected will continue for a long time.

  According to the twelfth aspect of the present invention, the operation of displaying the three-dimensional map screen (image projection operation by the image projecting means) is continuously executed when the host vehicle is stopped, and intermittently when the host vehicle is running. Therefore, the display of the map screen can be effectively performed in accordance with the running and stopping states of the vehicle.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows the overall configuration of a vehicle information apparatus according to the present invention by combining functional blocks.
In FIG. 1, the display control means 1 is configured to include a microcomputer and incorporates display control on a head-up display (hereinafter referred to as HUD) 2 and a normal display 3 provided as image projection means. The configuration is performed through a video RAM. Although not specifically shown, the HUD 2 has a known configuration in which a display module for image generation (for example, a combination module of a color liquid crystal panel and a light source unit), a reflection mirror, and the like are unitized. The normal display 3 is configured by using, for example, a liquid crystal panel.

  In this case, for example, the HUD 2 is arranged at a position corresponding to the driver's seat on the dashboard of the vehicle, and performs an operation of displaying the image as a virtual image by projecting the image on the windshield in front of the driver's seat. . Specifically, as shown in FIG. 2, which is a simplified representation of the periphery of the vehicle driver's seat, the HUD 2 corresponds to the upper region in the vehicle driver's front view, particularly the front of the steering wheel S in the vehicle windshield G. The image is projected onto the upper area (indicated by a two-dot chain line in FIG. 2; hereinafter referred to as a display area) A. Moreover, the normal display 3 is arrange | positioned at the dashboard center of a vehicle, for example. FIG. 2 also shows a vehicle M located in front of the host vehicle.

  The position detection means 4 includes a well-known GPS receiver or the like in the car navigation apparatus, and gives the vehicle current position information (longitude / latitude information) indicating the current position of the host vehicle to the display control means 1. It has become.

  The map information memory 5 provided so as to be accessible from the display control means 1 serves as both the storage means and the auxiliary storage means in the present invention, stores road map data for car navigation, 3D object data indicating the position and shape of a fixed object (such as a building) is stored in a state that can be associated with road map data.

  The line-of-sight direction detection means 6 is provided for detecting the line-of-sight direction of the vehicle driver. Although not specifically shown, for example, the line-of-sight direction detection unit 6 projects infrared light toward the face of the vehicle driver. Light means, photographing means for converting reflected infrared light on the face of the vehicle driver into a video signal, and the vehicle driver's face by performing binarization processing and feature point extraction processing based on the video signal An image processing means for extracting the image of the vehicle, and a calculation means for detecting the gaze direction of the vehicle driver based on information such as the vehicle driver's face direction, gaze direction, and pupil diameter obtained based on the extracted image; The detection output is given to the display control means 1.

The communication means 7 (corresponding to the information acquisition means) is, for example, another vehicle (in this embodiment) that exists on the road around the current position of the host vehicle by road-to-vehicle communication with a road machine (not shown). , Provided to acquire moving body information (positions and types of other vehicles (for example, distinction between large vehicles and small vehicles), information indicating the direction of travel) related to the vehicle) Yes.
In order to realize such a mobile body information acquisition system, the road unit is provided with a function of collecting the mobile body information by road-to-vehicle communication with a vehicle. Thus, the function of transmitting the moving body information about the host vehicle provided from the display control means 1 and the information indicating that the host vehicle is not parked to the road unit is set. Moreover, the system structure which performs the acquisition operation | movement of the above mobile body information directly by vehicle-to-vehicle communication may be sufficient.
In this case, the communication means 7 is provided so that the mobile body information acquisition operation as described above is periodically executed in real time or in a relatively short cycle, and the acquired mobile body information is accessible from the display control means 1. The peripheral mobile body information memory 8 is updated and stored.

  The HMI controller 9 includes operation means (including a hand switch attached to the steering wheel S, a separate remote control switch, etc.) including an after-mentioned control switch operated by a vehicle driver, a voice input means, and the like. Therefore, various operation signals can be output to the display control means 1. The normal display 3 may be used for assisting operation input by the HMI controller 9.

  The shift position detection means 10 outputs a signal indicating the shift position (known positions such as “P”, “R”, “N”, “D”, etc.) of the host vehicle (for example, an automatic vehicle) to the display means. It has become.

  FIG. 3 schematically shows an example of a three-dimensional map screen displayed (projected) on the display area A (see FIG. 2) by the HUD 2, and the display control means 1 performs such display. For example, the control described in (1) to (4) below is performed.

  (1) The current position of the host vehicle is specified based on the vehicle current position information from the position detection means 4, and road map data in a predetermined range around the specified current position is acquired from the map information memory 5, and at the same time Then, the three-dimensional object data (data associated with the road map data) indicating the fixed object existing in the predetermined range around the current position is acquired from the map information memory 5. The predetermined range around the current position, that is, the display range (scale) on the map screen, can be changed as appropriate according to the operation through the HMI controller 9.

  (2) The mobile body information (information indicating the position, type, speed, and traveling direction of the other vehicle) related to other vehicles existing around the current position of the host vehicle is acquired from the peripheral mobile body information memory 8.

(3) Projection image data obtained by changing the map screen indicated by the acquired road map data to a three-dimensional map screen (hereinafter referred to as a mall view screen) in a form of looking up from a reference viewpoint set below the road surface. The image processing is performed so that the mall view screen corresponding to the projection image data becomes a semi-transparent image, and other vehicles (except for parked and stopped vehicles) indicated by the acquired moving body information are further displayed. In FIG. 3 are drawn at corresponding positions (positions indicated by the mobile object information) on the mall view screen as shown in FIG. 3 (shown with symbols Qa, Qb, and Qc in FIG. 3). Create image data for projection.
In this case, the above-described shape is drawn in a form that can specify the type and traveling direction of the corresponding vehicle. That is, in the example of FIG. 3, the shapes Qa and Qb indicate that the vehicle to be displayed is a small vehicle (including a small truck), and the traveling direction can be recognized by the shape. . The shape Qc indicates that the vehicle to be displayed is a large vehicle (including a bus), and the traveling direction can be recognized by the shape. In the example of FIG. 3, an example in which the figures Qa, Qb, and Qc are drawn in a relatively realistic state is shown. However, even when the corresponding vehicle position, traveling direction, and type are known, Of course it is good.
In this embodiment, as described above, the projection image data in a state where the mall view screen and the figure are drawn on the same screen are created. However, the projection image data showing the mall view screen and the figure are shown. The image data for projection may be created separately and combined later. Further, the position of the reference viewpoint, that is, the elevation angle of the mall view screen, can be changed as appropriate according to an operation through the HMI controller 9.

  (4) Rendering the acquired three-dimensional object data so as to be a semi-transparent image looking up from the reference viewpoint, creating drawing data relating to a fixed object existing in the display range, and drawing the drawing data The data is output to the HUD 2 in a form superimposed on the projection image data. In this case, in this embodiment, at the time of rendering based on such three-dimensional object data, drawing data is created such that the fixed object closer to the current position of the vehicle has higher light transmittance. As a means for creating such drawing data, for example, a means for setting a transparency parameter according to the distance from the own vehicle for each fixed object, or for each fixed object from the own vehicle. A means for setting an alpha channel texture (transparency setting texture) having a light transmission value corresponding to the distance of the image can be considered.

  On the other hand, in the HUD 2, the image data for projection given from the display control means 1 as described above (that is, the image data for projection in which the image showing the other vehicle is drawn on the mall view screen drawn as a translucent image) Display area A (see FIG. 2) in which the image corresponding to the fixed data rendered so as to be a translucent image is set in the vehicle driver's front view. Thus, a mall view screen (three-dimensional map screen) as shown in FIG. 3 is displayed in the display area A. In addition, in the example of FIG. 3, the code | symbol R shows a road and the code | symbol B shows a fixed object (building).

  In this case, the display control means 1 outputs the projection image data created in (3) to the HUD 2 without executing the control described in (4) according to the operation through the HMI controller 9. It can also be configured. When configured in this way, the mall view screen displayed in the display area A by the HUD 2 shows only the road R and the shapes Qa, Qb, and Qc as shown in FIG.

  The display control means 1 is configured to perform display switching control as shown in the flowchart of FIG. 5 based on outputs from the line-of-sight direction detection means 6, the HMI controller 9, and the shift position detection means 10, and hereinafter this Will be described.

  That is, in FIG. 5, the display control means 1 determines whether the control switch provided in the HMI controller 9 is on or off (step S1). It is determined whether or not (see FIG. 3) is being displayed (whether or not the HUD 2 is performing an image projection operation) (step S2). If the mall view screen is displayed, the process returns to step S1 after executing step S3 to end the display. If the mall view screen is not displayed, the process jumps to step S3 and returns to step S1.

  On the other hand, when the control switch is ON, it is determined whether the line-of-sight direction of the vehicle driver is the display area A direction or the other direction based on the detection output of the line-of-sight direction detection means 6. (Step S4).

  If the line-of-sight direction of the vehicle driver is a direction other than the display area A, the process returns to step S1 after executing step S5 for setting the determination flag to “1”. On the other hand, when the vehicle driver's line-of-sight direction is the display area A direction, the shift position of the host vehicle is “P” or “N” based on the signal from the shift position detection means 10. Or a position other than that (step S6).

  If the shift position is “P” or “N”, it is determined whether or not the mall view screen is being displayed in the display area A (step S7). If the mall view screen is not displayed, the process proceeds to step S9 after executing the step S8 of starting the display of the mall view screen by operating the HUD 2, and if the mall view screen is already displayed, the step The process jumps to S8 and proceeds to step S9.

  In step S9, it is determined whether or not the display conditions in the display area A (the scale and elevation angle of the mall view screen, the type of display image, etc.) have been changed. 9 through. If it is determined that the display condition has been changed, the process returns to step S1 after executing step S10 for changing the display image in the display area A to satisfy the new display condition, but the display condition is changed. If it is determined that it has not been performed, the process jumps to step S10 and returns to step S1.

  If it is determined in step S6 that the shift position of the host vehicle is other than “P” and “N”, it is determined whether or not the determination flag is “1” (step S11).

  If the determination flag is “1” (corresponding to a state after the driver's line-of-sight direction once turned to a direction other than the display area A direction), is the mall view screen being displayed in the display area A? It is determined whether or not (step S12). If the mall view screen is not displayed, the process proceeds to step S14 after executing the step S13 for starting the display of the mall view screen by operating the HUD 2, and if the mall view screen has already been displayed, Jump to S13 and proceed to Step S14.

  In step S14, it is determined whether or not a set time, for example, 5 seconds has elapsed after the display of the mall view screen is started. If the set time has not elapsed, the process returns to step S1 as it is. When elapses, step S15 for resetting the determination flag to “0” is executed, and then the process returns to step S1.

  If “NO” is determined in the step S11, that is, if the determination flag is “0”, it is determined whether or not the mall view screen is being displayed in the display area A (step S16). . If the mall view screen is displayed, the process returns to step S1 after executing step S17 to end the display. If the mall view screen is not displayed, the process jumps to step S17 and returns to step S1.

The above control contents are summarized as follows.
That is, in the state where the control switch is turned on, the mall view screen is displayed in the display area A only when the line-of-sight direction of the vehicle driver faces the display area A. Is “P” or “N”, the display of the mall view screen (image projection operation by HUD2) is continuously performed. In this case, the display condition changing operation by the HMI controller 9 is effective. On the other hand, when the shift position of the host vehicle is other than “P” and “N”, when the vehicle driver's line-of-sight direction is in the display area A direction continues for more than 5 seconds, The determination flag is reset to “0”, and the display of the mall view screen is interrupted accordingly. Such a display interruption state is canceled when the determination flag is set to “1” as the line-of-sight direction of the vehicle driver subsequently turns to the display area A direction.

  In FIG. 5, the determination content in step S6 is changed to a mode for determining the stop state and the running state of the host vehicle based on the vehicle speed signal, and when the stop state is determined, the control after step S7 is executed. It is good also as a structure which performs control of step S11 transfer, when it determines with a driving state.

According to the present embodiment described above, the following operations and effects can be achieved.
That is, the display control means 1 is a three-dimensional map screen composed of a translucent image in a form in which the map screen indicated by the road map data acquired from the map information memory 5 is looked up from the reference viewpoint set below the road surface ( In response to this, the display area A (the upper area corresponding to the front of the steering wheel S in the windshield G of the vehicle as shown in FIG. 2) is output. The mall view screen is displayed for driving support.

  The mall view screen displayed in this way eliminates the possibility of obstructing the vehicle driver's field of view, and when the vehicle driver checks the displayed mall view screen, the line of sight is facing upward. However, since the mall view screen is also looked up from the reference viewpoint set below the road surface, there is no possibility that the driver will feel uncomfortable.

  The communication means 7 periodically executes the mobile object information acquisition operation for other vehicles existing on the road around the current position of the host vehicle in real time or in a relatively short cycle, and moves the acquired mobile object information to the periphery. The body information memory 8 is updated and stored, and the display control means 1 displays other information indicated by the mobile body information acquired from the peripheral mobile body information memory 8 at the corresponding position on the mall view screen displayed as described above. The images Qa, Qb, and Qc (see FIG. 3) indicating the vehicle are displayed.

  As a result, on the mall view screen, the images Qa, Qb, and Qc indicating the presence of other vehicles are clearly displayed in a form that is transmitted through the map screen that is a translucent image. It is possible to easily grasp the positional relationship between the vehicle and the host vehicle, which is beneficial for safe driving of the vehicle. In addition, since the above-described shapes Qa, Qb, and Qc are in a state in which the type of the corresponding vehicle can be specified, the vehicle driver side grasps the positional relationship with other vehicles and simultaneously determines the type of the moving body. In addition, since the shapes Qa, Qb, and Qc are in a state including information indicating the moving direction of the other vehicle, on the vehicle driver side, the moving direction of the other vehicle At the same time, it will be more useful for safe driving of the vehicle.

  In this case, when acquiring the road map data around the current position from the map information memory 5, the display control means 1 simultaneously shows a fixed object existing in a predetermined range around the current position from the map information memory 5. Obtain 3D object data, render the 3D object data as a translucent image looking up from the reference viewpoint, create drawing data related to the fixed object, and draw the drawing data for the projection The data is output to the HUD 2 in a form superimposed on the image data. Accordingly, on the mall view screen, a fixed object B (such as a building) on the road is also displayed as a three-dimensional image. Therefore, on the vehicle driver side, the displayed map screen and the actual landscape are displayed. Based on the comparison, it is possible to accurately grasp the exact position of the host vehicle and the surrounding situation. In addition, since the three-dimensional image of the fixed object B is displayed as a translucent image, even when another vehicle exists behind the fixed object B, the position and type of the other vehicle on the mall view screen. In addition, the shapes Qa, Qb, and Qc indicating the traveling direction can be accurately displayed.

  The display control means 1 is configured to create drawing data such that the closer to the current position of the host vehicle, the higher the light transmittance when rendering the three-dimensional object data indicating the fixed object B, that is, on the mall view screen Since the fixed object B closer to the current vehicle position is displayed so that the light transmittance is higher, the shapes Qa, Qb, Qc displayed on the mall view screen to indicate the position of another vehicle, etc. Can be recognized in a clearer state at a position relatively closer to the host vehicle, which is useful in actually driving the vehicle.

  Since the mall view screen is displayed in the display area A only when the line-of-sight direction of the vehicle driver faces the display area A, which is the upper area in the front view, the display operation is useless. No fear of being done.

  In the state where the mall view screen is displayed in the display area A, the display operation of the mall view screen is performed when the line-of-sight direction of the vehicle driver continues for 5 seconds or more which is the set time for the direction of the display area A. Is interrupted, there is no possibility that the state in which the confirmation of the forward view by the vehicle driver is neglected will continue unintentionally for a long time.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and for example, the following modifications or expansions are possible.
Means for designating an intersection existing at the destination of the own vehicle (for example, means for designating in response to an operation input from the HMI controller 9, means for designating automatically by a car navigation function using the position detection means 4, etc.) When the intersection is designated by the designation means as described above, the display control means 1 creates projection image data in a form in which the center of the intersection is located at the center of the image projection area by the HUD 2 and generates the HUD 2 It is good also as a structure which outputs to.

  According to this configuration, the center of the intersection designated by the designation means is positioned at the center of the mall view screen displayed in the display area A. That is, when the center of the intersection existing at the destination of the own vehicle is deviated from the center of the display area A, the other vehicle is present at a position relatively close to the center of the intersection. There is a possibility that the vehicle may not be displayed on the mall view screen, but this is possible when the center of the designated intersection is located at the center of the display area A as in the above configuration. This makes it possible to eliminate the sexuality and is beneficial for safe driving of the vehicle.

  When rendering based on the three-dimensional object data indicating a fixed object, the display control means 1 emits light only for a fixed object that is within the set distance range from the current position of the own vehicle among the fixed objects existing in the traveling direction of the own vehicle. It may be configured to create drawing data that increases the transparency. According to such a configuration, it is possible to reduce the amount of data processing related to the rendering, and thus it is possible to contribute to reducing the burden on the display control unit 1.

  The display control means 1 is configured to create drawing data in which the light transmittance is higher as the fixed object is farther from the current position of the host vehicle when rendering based on the three-dimensional object data in the traveling state of the host vehicle. Also good. According to this configuration, when the fixed object on the road is displayed as a semi-transparent three-dimensional image on the mall view screen in the traveling state of the host vehicle, the fixed object far from the vehicle current position has a higher light transmittance. Therefore, it is possible to prevent a situation in which the vehicle driver who is viewing the mall view screen feels that a fixed object suddenly appears nearby as the vehicle travels.

  The display control means 1 may be configured to continuously execute the image projection operation by the HUD 2 when the host vehicle is stopped, and to intermittently execute the image projection operation at a predetermined period when the host vehicle is running. . According to this configuration, the operation of displaying the mall view screen in the display area A is continuously executed when the host vehicle is stopped, and intermittently executed when the host vehicle is running. The display of the view screen can be effectively performed according to the running and stopping states of the vehicle.

  Communication for acquiring mobile body information relating to other vehicles as information acquisition means for acquiring in real time or periodically mobile body information indicating the position of other mobile bodies existing on the road around the current position of the host vehicle Although the means 7 is provided, a camera for photographing the front of the host vehicle is provided as the information acquisition means, and this camera can be used for real-time or periodic information on moving bodies related to humans (pedestrians and bicycle riders) on the road. It is good also as a structure which displays the figure which shows the person shown by the acquired mobile body information in the corresponding position on a mall view screen.

  The detection output by the line-of-sight direction detection means 6 can be used for other purposes. For example, when the vehicle is in a running state, a warning is output when the vehicle driver's line-of-sight direction detected by the line-of-sight direction detection unit 6 is directed to the normal display 3 for more than a predetermined time. it can.

  It is good also as a structure which displays a three-dimensional map screen on the sun visor installed in the upper area | region in the vehicle driver's front visual field. Further, the normal display 3 may be provided as necessary. Although the map information memory 5 serving as both storage means and auxiliary storage means is provided, these storage means and auxiliary storage means may be constituted by independent memories.

Functional block diagram of the entire apparatus showing an embodiment of the present invention A simplified representation of the area around the driver's seat Schematic diagram showing a display example 1 Schematic diagram showing a display example 2 Flow chart showing contents of control by display control means

Explanation of symbols

  1 is a display control means, 2 is a head-up display (image projection means), 3 is a normal display, 4 is a position detection means, 5 is a map information memory (storage means, auxiliary storage means), 6 is a gaze direction detection means, 7 Is a communication means (information acquisition means), 8 is a peripheral mobile information memory, and 9 is an HMI controller.

Claims (12)

Image projecting means for projecting an image onto an upper region in the vehicle driver's front vision;
Storage means for storing road map data;
Position detecting means for detecting the current position of the vehicle;
The road map data around the current vehicle position detected by the position detection unit is acquired from the storage unit, and the map screen indicated by the acquired road map data is looked up from the reference viewpoint set below the road surface. Display control means for creating projection image data changed to a three-dimensional map screen in the form and outputting it to the image projection means;
A vehicle information display device comprising: Among moving objects other than the host vehicle, the information acquisition means for acquiring the moving body information indicating the position of the moving body existing on the road around the vehicle current position detected by the position detection means in real time or periodically,
The display control means creates the three-dimensional map screen as a semi-transparent image, and draws a figure indicating the position of the moving object indicated by the moving object information acquired by the information acquiring means on the three-dimensional map screen. 2. The vehicle information display device according to claim 1, wherein the projection image data in a state is output. The vehicle information display device according to claim 2,
The mobile body information acquired by the information acquisition unit is configured to include information indicating the type of the mobile body,
The vehicular information display device, wherein the display control means outputs projection image data in which the shape is drawn in a form in which the type of the moving body indicated by the moving body information can be specified. The vehicle information display device according to claim 2 or 3,
The mobile body information acquired by the information acquisition unit is configured to include information indicating a traveling direction of the mobile body,
The display control means outputs projection image data in which a figure including information indicating a moving direction of the moving body indicated by the moving body information is drawn on the three-dimensional map screen. Information display device. The vehicle information display device according to any one of claims 2 to 4,
A designation means for designating an intersection existing at the destination of the own vehicle,
The display control means creates projection image data in such a form that when the intersection is designated by the designation means, the center of the intersection is located at the center of the image projection area by the image projection means. Vehicle information display device. Auxiliary storage means for storing three-dimensional object data indicating the position and shape of a fixed object on the road in a state associated with road map data stored in the storage means;
The display control means creates the projection image data so that a three-dimensional map screen corresponding to the projection image data becomes a translucent image, and three-dimensional object data around the current vehicle position detected by the position detection means. From the auxiliary storage means, rendering the acquired three-dimensional object data so as to be a translucent image in a form looking up from the reference viewpoint to create drawing data relating to the fixed object, and drawing the drawing data 6. The vehicle information display device according to claim 1, wherein the information is output in a form superimposed on the projection image data. The vehicle information display device according to claim 6,
The display control means creates drawing data such that a fixed object closer to the current vehicle position detected by the position detection means has a higher light transmittance during rendering based on the three-dimensional object data. A vehicle information display device. The vehicle information display device according to claim 7,
The display control means is a fixed object that is within a set distance range from the current vehicle position detected by the position detection means among the fixed objects existing in the traveling direction of the host vehicle during rendering based on the three-dimensional object data. An information display device for a vehicle, characterized in that drawing data is created so as to increase the light transmittance only for. The vehicle information display device according to claim 6,
In the traveling state of the host vehicle, the display control means is rendering data such that, when rendering based on the three-dimensional object data, the fixed object farther from the current vehicle position detected by the position detection means has a higher light transmittance. An information display device for a vehicle, characterized in that Gaze direction detecting means for detecting the gaze direction of the vehicle driver,
The display control means starts an image projecting operation by the image projecting means when the gaze direction detected by the gaze direction detecting means becomes an image projection area direction by the image projecting means. Item 10. The vehicle information display device according to any one of Items 1 to 9. Gaze direction detecting means for detecting the gaze direction of the vehicle driver,
The display control unit interrupts the image projecting operation by the image projecting unit when the gaze direction detected by the gaze direction detecting unit continues to face the image projection area direction by the image projecting unit for a set time or longer. The vehicle information display device according to claim 1, wherein the vehicle information display device is used. The display control means continuously executes an image projecting operation by the image projecting means when the host vehicle is stopped, and intermittently executes the image projecting operation at a predetermined cycle when the host vehicle is running. The vehicle information display device according to any one of claims 1 to 11.

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