JP6443666B2 - Vehicle display system - Google Patents

Description

  The present invention relates to a vehicle display system that allows a user to visually recognize a virtual image by projecting display light indicating a display image onto a transmission / reflection surface present in the host vehicle.

  A vehicle display system that allows a user to visually recognize a virtual image uses a head-up display (HUD) as a display device. For example, an image disclosed in Patent Document 1 that guides the route of a vehicle is displayed as a front actual scene. By superimposing, it is possible to provide information while maintaining the user's line of sight in the traveling direction (front side).

JP 2011-121401 A

  However, in a HUD that superimposes an image for performing route guidance on a real scene such as that disclosed in Patent Document 1, when a route guidance image is superimposed on an area where the luminance and color of the real scene vary, a route guidance image to be superimposed is used. There was a problem that the visibility of the information was reduced and it was difficult to recognize the information.

  The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle display system capable of improving the visibility of a route guidance image to be superimposed on a real scene and facilitating recognition of route guidance information. And

In order to achieve the above object, a vehicle display system according to a first aspect of the present invention projects a route guidance image on a transmission / reflection surface and visually recognizes a virtual image of the route guidance image together with a real scene through the transmission / reflection surface. In the vehicle display system, a real scene image acquisition unit that captures a real scene and captures a real scene image, and determines the size of the display area that satisfies a predetermined condition from the obtained real scene image, and An image analysis unit that analyzes a temporal transition of the size and detects a reduction tendency of the display area; and when the display area is displayed in the display area of the reduction tendency, toward the display area other than the reduction tendency A display control unit that moves the route guidance image.

In the vehicular display system according to the second aspect of the present invention, the image analysis unit analyzes the time transition of the size of the display area, and the display area is expanding or / and substantially constant. And when the route guidance image is displayed in the display area that tends to be reduced, the display control unit has a time transition of the size of the display area that is the enlargement tendency or The route guidance image is moved toward a display area that is substantially constant .

  Further, in the vehicle display system according to the third aspect of the invention, the image analysis unit can detect at least a fast change with a fast change in size and a slow change with a slow change in the time transition of the size of the display area. The display control unit changes the display mode without moving the route guidance virtual image when the display area in which the route guidance virtual image is displayed is the shrinking tendency and the high-speed change. And

  According to the vehicle display system of the first aspect of the present invention, it is detected from the time transition of the size of the display area whether the display area tends to be reduced. If the display area tends to be reduced, the visibility of the route guidance virtual image is reduced. The position of the route guidance virtual image can be moved to a display area that is easy to visually recognize before the route guidance, and the visibility of the route guidance virtual image can be maintained. In addition, since the position of the route guidance virtual image is not switched but moved as a moving image, the occupant can continue to recognize the route guidance information without losing sight of the route guidance virtual image.

  Further, according to the vehicle display system of the second invention, the visibility of the route guidance virtual image is not reduced immediately after the movement by moving the route guidance virtual image to a display area that does not tend to be reduced. The visibility of the guide virtual image can be maintained.

  Further, according to the vehicle display system of the third invention, the display position is not moved when the display area is reduced at high speed, so that the user can visually recognize the route guidance virtual image at the position where it originally existed. This makes it difficult to lose sight of the route guidance virtual image. Further, by changing the display mode, the route guidance virtual image is emphasized, and the recognizability can be improved.

It is a figure explaining the composition of the display system for vehicles in the embodiment of the present invention. It is a figure explaining the scenery which the passenger | crew of the vehicle in the said embodiment visually recognizes. It is a figure for demonstrating the prediction method of the magnitude | size of the display area in the said embodiment, and the horizontal axis is time and the vertical axis | shaft is the graph which showed the magnitude | size of the display area. It is a figure explaining the example 1 of operation of the display system for vehicles in the above-mentioned embodiment. It is a figure explaining the operation example 2 of the display system for vehicles in the said embodiment. It is a figure explaining the operation example 3 of the display system for vehicles in the said embodiment. It is a flowchart explaining operation | movement of the display system for vehicles in the said embodiment. It is a flowchart of the movement display process in the said embodiment.

FIG. 1 shows a system configuration of a vehicle display system 1 according to the present embodiment.
The vehicle display system 1 according to the present embodiment projects display light L representing a virtual image M onto a windshield (an embodiment of a reflection / transmission surface) 2a of the host vehicle 2, and the virtual image M is occupant (user) of the host vehicle 2. 3) a head-up display (hereinafter referred to as HUD) 100 that is visually recognized by 3; a front information acquisition unit 200 that acquires and analyzes a real scene image ahead of the host vehicle 2; and a navigation system 300 that generates information for route guidance. The display controller 400 controls the display of the HUD 100 based on information input from the front information acquisition unit 200 and the navigation system 300.

  The HUD (head-up display) 100 displays a display 10 that displays an image including a route guidance image J for displaying a route guidance virtual image M1 that is a feature of the present invention, and image light K indicating the image. A flat mirror 20 that reflects the light and a free-form curved mirror 30 that magnifies and deforms the image light K reflected by the flat mirror 20 and reflects the image light K as display light L toward the windshield 2a.

  The display 10 displays a route guidance image J indicating a guidance route, a vehicle information image indicating information related to the host vehicle 2, and the like on a display surface under the control of a display controller 400 described later. For example, a liquid crystal panel A transmissive liquid crystal display composed of a display element (not shown) such as a light source (not shown) that illuminates the display element. The display 10 is not a transmissive liquid crystal display, but a self-luminous organic EL display, a reflective DMD (Digital Micromirror Device), a reflective and transmissive LCoS (registered trademark: Liquid Crystal on Silicon), or the like. It may be constituted by. The display controller 400 to be described later adjusts the display position of the route guidance image J displayed on the display surface of the display 10 so that the occupant 3 can visually recognize the route guidance virtual image M1. Thereby, the passenger | crew 3 can visually recognize the route guidance virtual image M1 (virtual image M) aligned with the external scenery of the own vehicle 2. FIG.

  The plane mirror 20 reflects the image light K emitted from the display 10 toward the free-form curved mirror 30.

  The free-form surface mirror 30 is formed by forming a reflective film on the surface of a concave base material made of, for example, a synthetic resin material by means such as vapor deposition, and enlarges the image light K reflected by the flat mirror 20 and K is transformed and emitted as display light L in the direction of the windshield 2a.

  As shown in FIG. 2, the virtual image M viewed from the back side of the windshield 2a when viewed from the occupant 3 has a route guidance virtual image M1 that guides the route to the destination. The route guidance virtual image M1 is, for example, an image having a shape such as an arrow head or an arrow, and is superimposed on the lane in the traveling direction of the host vehicle 2 to indicate a specific direction. The route guidance virtual image M1 may include a character image such as “turn left 200m”. In addition, the route guidance virtual image M1 in this embodiment moves so that it may be displayed on the display area A with little variation in the brightness | luminance and color tone in the real scene analyzed by the front information acquisition part 200 mentioned later (moving display process). The movement display process of the route guidance virtual image M1 will be described in detail later.

  The above is the optical configuration of the HUD 100 in the present embodiment, and the display light L emitted from the HUD 100 is projected onto the windshield 2a of the host vehicle 2, whereby the predetermined windshield 2a on the upper side of the steering wheel 2b. The virtual image M is visually recognized in the displayable area E. The displayable area E of the windshield 2a corresponds to the display area of the display device 10. By moving the route guidance image J within the displayable area E of the display device 10, the displayable area of the windshield 2a. The virtual image M moves and is visually recognized in E. Below, the electrical structure of the display system 1 for vehicles is demonstrated.

  The forward information acquisition unit 200 extracts and displays information in front of the host vehicle 2 to extract the display area A with less variation in luminance and color in the actual scene. In the present embodiment, the host vehicle 2 A stereo camera (real scene image acquisition unit) 201 that images the front side, and an image analysis unit 202 that analyzes image data acquired by the stereo camera 201 are included.

  The stereo camera 201 captures a front area including a lane in which the host vehicle 2 travels, and transmits a real scene image to the image analysis unit 202. The image analysis unit 202 analyzes the acquired actual scene image and extracts a display area A with less variation in luminance, color, and the like from the actual scene image. Specifically, by detecting the luminance and color for each pixel in the actual scene image and performing statistical processing such as dispersion and standard deviation thereof, it is possible to detect variations in luminance and color for each region. As a result of the statistical processing, an area having a small variation in luminance and color that satisfies a predetermined reference value is extracted as the display area A. In the description of the present embodiment, the display area A to be extracted has a rectangular shape, but is not limited thereto, and may be a polygonal shape such as a circular shape (including an ellipse) or a hexagon. Further, in this embodiment, the image analysis unit 202 extracts the display area A from the real scene image that has little variation in luminance and color and is easily visible when the virtual image M is superimposed. A non-display area (not shown) that has a large variation in taste and is difficult to visually recognize when the virtual image M is superimposed may be extracted from the real scene image, and the virtual image M may be displayed so as to avoid this non-display area. In addition, although the example which extracts the display area A where the virtual image M superimposed using dispersion | distribution or a standard deviation is easy to visually recognize was shown as one Embodiment, you may extract using another method. In addition to the stereo camera, a normal monocular camera that captures visible light, a monocular three-dimensional stereo camera, or the like may be used as the real scene image acquisition unit.

  The image analysis unit 202 detects the size of the display area A and the time transition of the size, and outputs the detected size to the display controller 400 described later. The image analysis unit 202 can detect whether the size of the display area A tends to be reduced, enlarged, or substantially constant with respect to time. The image analysis unit 202 can detect whether the change in the size of the display area A is a high-speed change that is a high speed or a low-speed change that is a low speed. Further, when moving the route guidance virtual image M1, the image analysis unit 202 selects the display area A that is the destination of the route guidance virtual image M1. Specifically, the image analysis unit 202 (1) is a display area A in which an enlargement tendency or size that is not a reduction tendency is maintained substantially constant, and (2) is larger than the route guidance virtual image M1. The display area A with the prediction is selected as the display area A to which the route guidance virtual image M1 is to be moved.

The prediction of the size of the display area A performed by the image analysis unit 202 will be described with reference to FIG. FIG. 3 is a graph showing the time transition of the display area A, where the horizontal axis indicates time and the vertical axis indicates the size of the display area A. That is, the slope of the graph indicates the increasing speed of the display area A. The numerical values such as “110%”, “100%”, “80%”, and “50%” displayed on the vertical axis indicate the ratio of the size of the display area A to the size of the route guidance virtual image M1 to be displayed. Yes. That is, that the size of the display area A is 100% or more indicates that the size of the display area A is equal to or larger than the size of the route guidance virtual image M1, and is large enough to display the route guidance virtual image M1. .
The image analysis unit 202 predicts the future size of the display area A based on the size of the display area A and the increasing speed of the display area A. Specifically, for example, the image analysis unit 202 (1) like C1 shown in FIG. 3, the average size of the display area A until the predetermined time t1 elapses is the route guidance virtual image M1. When the size is 110% or more with respect to the size, the display area A is selected as the movement destination. Further, the image analysis unit 202 (2) has a rapid average image acceleration of 8% or more in the display area A during a predetermined time t2 (for example, 5 seconds) as indicated by C2 in FIG. When the size of the display area A reaches 50% or more of the size of the route guidance virtual image M1, the display area A is selected as the movement destination. Further, the image analysis unit 202 (3) has a gentle average image acceleration of 3% or more in the display area A during a predetermined time t3 (for example, 10 seconds) as indicated by C3 in FIG. When the size of the display area A reaches 80% or more of the size of the route guidance virtual image M1, the display area A is selected as the destination. Thus, by predicting the size of the display area A based on the size of the display area A and the increasing speed of the display area A, the display area A as the movement destination reaches the size of the route guidance virtual image M1. Even if not, the display area A of the movement destination can be selected quickly, and the route guidance virtual image M1 can be moved early.

  The navigation system 300 stores map data, reads map data in the vicinity of the current position from the storage unit based on position information of the host vehicle 2 detected by a GPS controller (not shown), and generates guide route information to the destination. To the display controller 400 described later.

  The display controller 400 is an ECU (Electrical Control Unit) composed of a CPU, ROM, RAM, graphic controller, and the like, and information on the display area A input from the front information acquisition unit 200 and a guide route input from the navigation system 300. Based on the information, the route guidance virtual image M1 is displayed on the HUD 100. When it is determined that the route guidance virtual image M1 is displayed in the display area A that tends to be reduced, the display controller 400 moves the route guidance virtual image M1 to the display area A that is the moving destination as a moving image.

(Operation example 1)
From this, the operation example of the display system 1 for vehicles is demonstrated using FIG. 4 thru | or FIG. FIG. 4 is a diagram for explaining an operation example 1 of the display system 1 for a vehicle, and is a diagram showing a scenery visually recognized by the occupant 3 through the windshield 2a. FIG. 4A shows a case where the host vehicle 2 travels away from the preceding vehicle and the display area A can be provided in the lane between the host vehicle 2 and the preceding vehicle. FIG. 4 is a diagram showing the scenery after a predetermined time in FIG. 4A, in which the host vehicle 2 travels near the preceding vehicle, and the display area A is displayed on the lane between the host vehicle 2 and the preceding vehicle. The case where it cannot be provided is shown.
When the own vehicle 2 and the preceding vehicle are traveling away from each other, the lane between the own vehicle 2 and the preceding vehicle is vacant, so the image analysis unit 202 determines the lane between the own vehicle 2 and the preceding vehicle. It can be extracted as the display area A. The display controller 400 superimposes and displays the route guidance virtual image M1 on the display area A in the lane between the host vehicle 2 and the preceding vehicle. At this time, even when the image analysis unit 202 extracts the rear glass of the rear vehicle body of the preceding vehicle and the area under the rear glass as the display area A with little variation in luminance and color, the display controller 400 Since the contrast between the route guidance virtual image M1 and the real scene is more stable when superimposed on a road that is not a moving body, the route guidance virtual image M1 is superimposed on a lane that is not a moving body.
When the host vehicle 2 starts to travel near the preceding vehicle, the display area A arranged in the lane between the host vehicle 2 and the preceding vehicle is reduced based on the approach of the preceding vehicle. The display area A of the rear body of the vehicle expands. Then, the image analysis unit 202 determines that the display area A on which the route guidance virtual image M1 is displayed is the display area A1 having a tendency to shrink, and selects the display area A that is the destination of the route guidance virtual image M1. . The destination of the route guidance virtual image M1 is a display area A that has a size capable of displaying the route guidance virtual image M1 and that does not tend to shrink. For example, when the display controller 400 predicts that, based on the approach of the preceding vehicle, the display area A of the rear body of the preceding vehicle is the display area A2 that tends to expand, the size is such that the route guidance virtual image M1 can be displayed. As shown in FIG. 4B, the route guidance virtual image M1 is dynamically moved to the display area A2 superimposed on the rear vehicle body of the preceding vehicle. It should be noted that the color of the route guidance virtual image M1 is preferably changed in order to increase the contrast with the actual scene when the overlapping region is different (from the lane to the rear body of the preceding vehicle), It is not necessary to change the color of the guide virtual image M1 so as not to become complicated. Note that the destination of the route guidance virtual image M1 need not be the display area A1 that tends to be reduced, so that the display area (not shown) whose size is maintained almost constant even if it is not the display area A2 that tends to be enlarged. It may be.

  Thus, when the display area displaying the route guidance virtual image M1 tends to be reduced, the visibility of the route guidance virtual image M1 can be maintained by moving the route guidance virtual image M1. In addition, by setting the destination to the display area A that does not tend to be reduced, the display area A is not reduced immediately after the route guidance virtual image M1 is moved, and the visibility can be maintained for a long time.

  Moreover, it is preferable that the route guidance virtual image M1 starts moving before the displayed display area A becomes smaller than the route guidance virtual image M1. Since the route guidance virtual image M1 moves before the visibility of the route guidance virtual image M1 decreases, the occupant 3 can capture the movement of the route guidance virtual image M1 while reliably recognizing the route guidance virtual image M1.

(Operation example 2)
FIG. 5 is a diagram for explaining an operation example 2 of the vehicle display system 1 and shows a time transition of the route guidance virtual image M1 displayed in the displayable area E. FIG. As shown in FIG. 5A, when the route guidance virtual image M1 is displayed in the display area A and the display area A is reduced based on the time transition (FIG. 5B), the display controller 400 displays the route guidance. The virtual image M1 is reduced in accordance with the size of the display area A1 that tends to be reduced. Then, the display controller 400 starts selecting the destination of the route guidance virtual image M1. When the display area A2 of the enlargement tendency is detected by the image analysis unit 202, the route guidance virtual image M1 is returned to the normal size as shown in FIG. And as shown in FIG.5 (d), the route guidance virtual image M1 is moved toward the display area A2 of an expansion tendency. After the movement, the display controller 400 adjusts the size of the route guidance virtual image M1 in accordance with the size of the display area A2 that is the movement destination.

  In this way, the route guidance virtual image M1 is reduced in accordance with the display area A1 having a reduction tendency. When the destination of the route guidance virtual image M1 is selected and starts moving, the route guidance virtual image M1 is emphasized by moving the route guidance virtual image M1 after returning it to its normal size (after enlargement). Is done. Therefore, the movement is started after the occupant 3 recognizes the route guidance virtual image M1, and the movement of the route guidance virtual image M1 can be reliably recognized.

(Operation example 3)
FIG. 6 is a diagram for explaining an operation example 3 of the vehicle display system 1 and shows a time transition of the route guidance virtual image M1 displayed in the displayable area E. FIG. As shown in FIG. 6A, when the route guidance virtual image M1 is displayed in the display area A and the display area A is rapidly reduced based on the time transition (FIG. 6B), the display controller 400 The display mode of the route guidance virtual image M1 is changed. Specifically, it is swung left and right without changing the position of the route guidance virtual image M1. Then, the display controller 400 starts selecting the destination of the route guidance virtual image M1. When the enlargement tendency display area A2 is detected by the image analysis unit 202, as shown in FIG. 6C, the route guidance virtual image M1 is moved toward the enlargement tendency display area A2. After the movement, the display controller 400 adjusts the size of the route guidance virtual image M1 in accordance with the size of the display area A2 that is the movement destination.

  Below, the operation | movement flow of the display system 1 for vehicles is demonstrated using FIG. First, in step S <b> 10, the display controller 400 inputs a display area A with little variation in luminance and color from the front information acquisition unit 200. Then, the display controller 400 displays the route guidance virtual image M1 in the display area A with good visibility in the input display area A (step S20). The display controller 400 monitors the time transition of the size of the display area A input from the front information acquisition unit 200, and determines whether the display area A tends to shrink (step S30). When the display area A on which the route guidance virtual image M1 is displayed is not reduced (NO in step S30), the display of the route guidance virtual image M1 is maintained, and the process returns to step S10 to input a new display area A. On the other hand, when the display area A where the route guidance virtual image M1 is displayed tends to be reduced (YES in step S30), the display controller 400 performs a moving display process (step S40) for moving the display of the route guidance virtual image M1. Transition.

  With reference to the flowchart of FIG. 8, the movement display process in this embodiment is demonstrated. After shifting to the movement display process, the display controller 400 starts selecting the movement destination of the route guidance virtual image M1 in step S41. As described above, the destination of the route guidance virtual image M1 is (1) the display area A in which the enlargement tendency or size that is not the reduction tendency is maintained substantially constant, and (2) the route guidance virtual image M1 or more. A display area A with a predicted size is selected.

  In step S42, the display controller 400 determines whether there is a candidate for the display area A to be a movement destination. If it is determined that there is a candidate for the display area A that is the movement destination (YES in step S42), the route guidance virtual image M1 is moved to the display area A that is the movement destination (step S43). . On the other hand, if the display controller 400 determines that there is no candidate for the display area A as the movement destination (NO in step S42), the display controller 400 proceeds to step S44, and determines whether the change in the display area A that tends to shrink is a high-speed change. judge. When the reduction of the display area A is a high-speed change (YES in step S44), the display controller 400 swings the route guidance virtual image M1 for at least a predetermined time (step S45). If the reduction of the display area A is not a high-speed change (NO in step S44), the route guidance virtual image M1 is reduced in accordance with the reduction of the display area A (step S46), and the process returns to step S41 to become the movement destination. Until the display area A is found, the size is adjusted based on the size of the display area A displayed at that time.

  In step S43 in which the route guidance virtual image M1 is moved to the destination display area A, if the route guidance virtual image M1 is swinging, the display controller 400 moves the route guidance virtual image M1 to the destination display area A. While swinging, make the rocking gentle. When the route guidance virtual image M1 is reduced in accordance with the size of the display area A, the movement is started after the route guidance virtual image M1 is returned to the original size. If the destination display area A is not selected after a predetermined time, the size of the route guidance virtual image M1 is returned to the normal size, and the color of the route guidance virtual image M1 is changed to an emphasized color. . When the route guidance virtual image M1 is swinging, the swing of the route guidance virtual image M1 is also stopped.

  As described above, the vehicle display system in the present embodiment projects the route guidance image J on the windshield (transmission / reflection surface) 2a, and the route guidance virtual image of the route guidance image J together with the actual scene through the windshield 2a. The vehicle display system that visually recognizes M1, the stereo camera 201 that captures a real scene image, and the size of the display area A that satisfies a predetermined condition from the obtained real scene image are determined. An image analysis unit 202 that analyzes the time transition and detects a reduction tendency of the display area A, and a display controller 400 that moves the route guidance virtual image M1 as a moving image when the display area A has a reduction tendency. Yes, from the time transition of the size of the display area A, it is detected whether the display area A tends to shrink. If the display area A tends to shrink, the visibility of the route guidance virtual image decreases. Can be moved located viewability easily display area A route guidance virtual image M1, it is possible to maintain the visibility of route guidance virtual image M1. Further, since the position of the route guidance virtual image M1 is moved not by simply switching but by moving images, the occupant 3 can continue to recognize the route guidance information without losing sight of the route guidance virtual image M1.

  Further, the display controller 400 moves the route guidance virtual image M1 toward the display area A other than the reduction tendency when the route guidance virtual image M1 is displayed in the reduction tendency display area A. In this way, by moving the route guidance virtual image M1 to the display area A that does not tend to shrink, the visibility of the route guidance virtual image M1 does not decrease immediately after the movement, and the visibility of the route guidance virtual image M1 is improved. Can be maintained.

  The image analysis unit 202 can detect at least a high-speed change with a fast change in size and a low-speed change with a slow change in the time transition of the size of the display area A. The display controller 400 can display a route guidance virtual image. When the display area A on which M1 is displayed tends to be reduced and changes at high speed, the display mode is changed without moving the route guidance virtual image M1. In this way, when the display area A is reduced at high speed, the display position of the route guidance virtual image M1 is not moved, and thus the user can visually recognize the route guidance virtual image M1 at the position where it originally existed. It is possible to make it difficult to lose sight of the route guidance virtual image M1. Further, by changing the display mode by swinging the route guidance virtual image M1, the route guidance virtual image M1 is emphasized, and the recognizability can be improved.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the following, various modifications can be made without departing from the scope of the present invention.

  In the above embodiment, the luminance and color variation of the actual scene is calculated, and the region without the luminance and color variation is extracted as the display region A. However, the position or obstacle of the obstacle in front of the host vehicle 2 is simply extracted. By detecting the time transition of the size of the object, a position that does not overlap the obstacle may be extracted as the display area A, and the route guidance virtual image M1 may be displayed.

  In the above embodiment, the route guidance virtual image M1 is moved to the display area A that does not tend to be reduced. However, if the reduction speed is slower than the display area A where the route guidance virtual image M1 is displayed, the movement is performed. The previous display area A may tend to shrink.

  In the above embodiment, the destination of the route guidance virtual image M1 is selected after it is determined that the display area A on which the route guidance virtual image M1 is displayed tends to be reduced. The change tendency of all the display areas A existing in the displayable area E may be monitored, and the movement destination candidates may be continuously selected without determining the reduction tendency of the display area A.

DESCRIPTION OF SYMBOLS 1 Display system for vehicles 2 Own vehicle 3 Crew (user)
DESCRIPTION OF SYMBOLS 100 Head-up display 200 Front information acquisition part 201 Stereo camera (real scene image acquisition part)
202 Image analysis unit 300 Navigation system 400 Display controller (display control unit)
A display area A1 display area of reduction tendency A2 display area of enlargement tendency K image light L display light M virtual image M1 route guidance virtual image

Claims (3)

In a vehicle display system that projects a route guidance image on a transmission reflection surface and visually recognizes a virtual image of the route guidance image together with a real scene through the transmission reflection surface,
A real scene image acquisition unit that captures a real scene and captures a real scene image, determines the size of the display area that satisfies a predetermined condition from the obtained real scene image, and determines the time transition of the size of the display area. An image analysis unit that analyzes and detects a reduction tendency of the display area; and when the display area is displayed in the display area of a reduction tendency, the route guidance image is moved toward a display area other than the reduction tendency A display control unit for causing
A display system for a vehicle. The image analysis unit can analyze the time transition of the size of the display area to detect whether the display area is expanding or / and substantially constant,
When the route guidance image is displayed in the display area with a decreasing tendency, the display control unit is directed toward the display area in which the time transition of the size of the display area is the expansion tendency or substantially constant. Move the route guidance image,
The vehicle display system according to claim 1. The image analysis unit is capable of detecting at least a fast change with a fast change in size and a slow change with a slow change in the time transition of the size of the display area,
The display control unit changes a display mode without moving the route guidance image when the display area where the route guidance image is displayed is the shrinking tendency and the high-speed change.
The vehicle display system according to any one of claims 1 and 2.

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