Image display device for vehicle

Abstract

The image display control unit has a first display control mode when the bad road driving assistance control is cancelled and a second display control mode when the bad road driving assistance control is executed, and when the first display control mode is executed, the display of the surrounding image is stopped when the vehicle speed reaches a first threshold value or more, and the display of the surrounding image is stopped when the vehicle speed reaches a second threshold value. In the execution of the second display control mode, the display of the peripheral image is temporarily stopped when the vehicle speed is equal to or greater than a first threshold value, and the display of the peripheral image that has been temporarily stopped is restarted when the vehicle speed is equal to or less than a second threshold value that is less than the first threshold value.

Description

Technical Field

[0001] The present invention relates to a vehicle image display device having a function of capturing images of the surroundings of a vehicle and displaying the images on a display inside the vehicle. Background Technology

[0002] Conventionally, a vehicle such as a car is equipped with a plurality of onboard cameras for capturing images of the surroundings of the vehicle. The images captured by these onboard cameras are displayed and controlled by an image display control unit.

[0003] For example, when the vehicle is traveling at a low speed lower than the set speed (e.g., 20 km / h), when the driver operates the image display switch, etc., the image display control unit operates the vehicle-mounted camera in the area that is the driver's blind spot. Then, the image display control unit displays the captured image on an information display installed in the vehicle.

[0004] Such a display of surrounding images is effective not only when the vehicle is driving on a narrow road and / or parked, but also when driving on a bad road. For example, Japanese Patent Publication No. 2022-101979 discloses a technology for generating a composite image that is not likely to give the driver a sense of disharmony when driving on a bad road.

[0005] However, the image display control unit usually displays the photographed image only when the vehicle's speed is in the low speed range (for example, less than 20km / h). That is, if the vehicle speed reaches the set speed (for example, 20km / h), the image display control unit automatically stops the image displayed so far.

[0006] However, when driving on a bad road, the driver changes the vehicle speed according to the road surface conditions. Thus, under the road surface conditions where the driver changes the vehicle speed, the image display control unit automatically stops the image display each time the vehicle speed exceeds the set speed. Therefore, the image display switch operation needs to be performed multiple times until the vehicle leaves the bad road, making the driver's operation cumbersome.

[0007] In view of the above situation, the present invention aims to provide a vehicle image display device that can achieve convenience and safety even when the vehicle speed changes while driving on a bad road. SUMMARY OF THE INVENTION

[0008] Technical Solution

[0009] One form of the vehicle image display device of the present invention is applied to a vehicle capable of performing rough road driving assistance control through at least any one of driving force distribution control for wheels and braking force distribution control for the wheels. The vehicle image display device includes: a photographing device that photographs the periphery of the vehicle; an image display device that is used to display the peripheral image photographed by the photographing device; an image display switch that indicates the display of the peripheral image; and an image display control device that, when the image display switch is turned on, causes the peripheral image to be displayed on the image display device. The image display control device has a first display control mode when the rough road driving assistance control is canceled and a second display control mode when the rough road driving assistance control is executed as display control modes. When executing the first display control mode, the image display control device stops displaying the peripheral image when the vehicle speed becomes equal to or higher than a first threshold. When executing the second display control mode, the image display control device temporarily stops displaying the peripheral image when the vehicle speed becomes equal to or higher than the first threshold, and restarts displaying the temporarily stopped peripheral image when the vehicle speed becomes less than a second threshold smaller than the first threshold.

[0010] Another form of the vehicle image display device of the present invention is applied to a vehicle capable of performing rough road driving assistance control through at least any one of driving force distribution control for wheels and braking force distribution control for the wheels. The vehicle image display device includes: a peripheral photographing module that photographs the vehicle; an image display module that displays the peripheral image photographed by the photographing module; an image display switch that indicates the display of the peripheral image; and a processor that, when the image display switch is turned on, causes the peripheral image to be displayed on the image display module. When canceling the rough road driving assistance control, the processor stops displaying the peripheral image when the vehicle speed becomes equal to or higher than a first threshold. When executing the rough road driving assistance control, the processor temporarily stops displaying the peripheral image when the vehicle speed becomes equal to or higher than the first threshold, and restarts displaying the temporarily stopped peripheral image when the vehicle speed becomes less than a second threshold smaller than the first threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic configuration diagram of an image display device mounted on a vehicle.

[0012] Figure 2 It is a top view showing an example of an information display and various operation switches.

[0013] Figure 3 It is a top view showing the installation positions of an in-vehicle camera and an information display.

[0014] Figure 4 is a flowchart (Part 1) showing a determination routine for an image display operation corresponding to a rough road driving assistance control state.

[0015] Figure 5 is a flowchart (Part 2) of a determination routine for an image display operation corresponding to a rough road driving assistance control state.

[0016] Figure 6 is a flowchart (Part 3) of a determination routine for an image display operation corresponding to a rough road driving assistance control state. Detailed Implementation Manner

[0017] Hereinafter, an embodiment of one form of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the drawings used in the following description, in order to make each component large enough to be recognizable on the drawings, each component is at a different scale. Therefore, the present invention is not limited to the number of components, the shape of the components, the ratio of the sizes of the components, and the relative positional relationship of the components described in these drawings.

[0018] As Figure 1 shown, as an example of an image display device applied to a vehicle 1 such as an automobile, the configuration of a vehicle image display device 2 having a function of displaying an image (surrounding image) obtained by photographing the periphery of the vehicle 1 on a display in the vehicle will be described.

[0019] Here, the vehicle image display device 2 of the present embodiment is applied to a vehicle 1 having a driving control unit 10 capable of executing rough road driving assistance control. And the vehicle image display device 2 changes the display control mode of the surrounding image displayed on the display according to the execution state of the rough road driving assistance control.

[0020] Therefore, before describing the vehicle image display device 2, an overview of the rough road driving assistance control performed by the driving control unit 10 will be described.

[0021] On the input side of the driving control unit 10, for example, a rough road driving mode button 11, a wheel speed sensor 15, and a gear position sensor 17 are connected.

[0022] As Figure 2As shown, the rough road driving mode button 11 is provided, for example, near the center of the instrument panel (not shown) that can be operated by the driver. The rough road driving mode button 11 is a button that switches from normal driving control to rough road driving assistance control based on the driver's operation input when the vehicle 1 is driving on rough roads such as snow roads, gravel roads, or muddy roads. It should be noted that in this embodiment, the normal driving control refers to, for example, the control for performing driving force distribution control and braking force distribution control applicable to driving on high-μ roads such as paved roads. On the other hand, the rough road driving assistance control refers to, for example, the control for performing driving force distribution control and braking force distribution control applicable to driving on rough roads such as snow roads, gravel roads, or muddy roads. It should be noted that the rough road driving mode button 11 is connected to the driving control unit 10 and is also connected to the image display control unit 5 described later.

[0023] The wheel speed sensor 15 is a sensor that detects the wheel speed of each of the multiple wheels (e.g., four wheels) of the vehicle 1. Therefore, the driving control unit 10 uses the wheel speeds detected by each wheel speed sensor 15 to detect, for example, the locked state and / or the idling state of each wheel. In addition, the driving control unit 10 can also calculate the vehicle speed Vs based on the average value of the wheel speeds of each wheel. It should be noted that the driving control unit 10 can calculate the vehicle speed Vs, for example, based on the output signal from a rotation speed sensor (not shown) for detecting the rotation speed of the output shaft of the transmission.

[0024] The gear position sensor 17 is, for example, a sensor that detects the gear position when the user operates the shift lever 16 (refer to Figure 2 ).

[0025] Therefore, during the operation of the shift lever 16, the gear position sensor 17 detects the gear position such as the forward driving gear (D gear, etc.), the parking gear (P gear, etc.), or the reverse driving gear (R gear).

[0026] Moreover, when the vehicle speed Vs is less than the set vehicle speed and the driver turns on the rough road driving mode button 11, the driving control unit 10 switches the driving mode of the vehicle 1 from normal driving control to rough road driving assistance control.

[0027] For example, when the forward driving gear or the reverse driving gear is detected by the gear position sensor 17, the driving control unit 10 switches from normal driving control to rough road driving assistance control on the condition that the rough road driving mode button 11 is turned on while the vehicle speed Vs is less than the set vehicle speed Vset1 (e.g., 20 km / h). Among them, if the vehicle speed Vs exceeds the predetermined vehicle speed (e.g., 40 km / h), the driving control unit 10 cancels the rough road driving assistance control.

[0028] Further, when the rough road driving assistance control is started, the driving control unit 10 comprehensively controls the engine, transmission, differential device, brakes, etc. Thus, the driving control unit 10 appropriately controls the driving force and braking force of the four wheels, etc., to achieve a smooth departure from the rough road.

[0029] For example, the driving control unit 10 performs torque distribution with a rear-wheel bias by controlling the engagement of the hydraulic multi-plate clutch of the center differential device (not shown). Further, for example, if a wheel that is spinning is detected based on a signal from the wheel speed sensor 15, the driving control unit 10 applies a braking force to the spinning wheel through braking control to suppress the wheel spin.

[0030] The driving control unit 10 that performs such rough road driving assistance control outputs the execution information of the rough road driving assistance control to the image display device 2.

[0031] As Figure 1 shown, the image display device 2 is configured to include an in-vehicle camera 3, an information display 4, and an image display control unit 5.

[0032] As Figure 3 shown, the in-vehicle camera 3 includes a front camera 3f and a rear camera 3r.

[0033] Each of the cameras 3f, 3r is composed of a wide-angle lens capable of wide-angle photography, a photographing element, etc. Further, each of the cameras 3f, 3r respectively photographs different ranges around the vehicle 1.

[0034] Specifically, each of the cameras 3f, 3r photographs the ranges of the driver's fields of vision 3Ff, 3Fr that are blind spots in front of or behind the vehicle body (for example, a range with a viewing angle of 180 degrees).

[0035] Therefore, the front camera 3f is installed, for example, at a predetermined position such as the front grille that can photograph the blind spot of the field of vision 3Ff. Further, the rear camera 3r is installed, for example, at a predetermined position around the rear license plate that can photograph the blind spot of the field of vision 3Fr.

[0036] Thus, in the present embodiment, the in-vehicle camera 3 (front camera 3f and rear camera 3r) corresponds to a specific example of a photographing device (photographing module).

[0037] Further, as Figure 1 shown, the peripheral images of the vehicle 1 photographed by each of the cameras 3f, 3r are output to the image display control unit 5.

[0038] As Figure 2 shown, the information display 4 is provided, for example, near the center of the instrument panel (not shown).

[0039] The information display 4 displays, for example, the surrounding images captured by the in-vehicle camera 3, or information for changing the settings of the vehicle 1, etc.

[0040] Thus, in the present embodiment, the information display 4 corresponds to a specific example of an image display device (image display module).

[0041] The image display control unit 5 functions as an image display control device that causes the surrounding images of the vehicle 1 captured respectively to be displayed on the information display 4 based on the operation instructions of the driver.

[0042] Therefore, a camera switch 6 and a home button 7 for the driver to operate are connected to the input side of the image display control unit 5.

[0043] As Figure 2 shown, the camera switch 6 is provided, for example, around the shift lever 16 that can be operated by the driver as an image display switch. The camera switch 6 functions as an on / off switch that causes the surrounding images captured by the in-vehicle camera 3 to be displayed on the information display 4.

[0044] As Figure 2 shown, the home button 7 is arranged together with the rough road driving mode button 11, etc. around the information display 4. The home button 7 is used, for example, to abort the display of various application software that is being started by the operation of the driver and cause the home screen to be displayed on the information display 4. Therefore, for example, even when the surrounding images captured by the in-vehicle camera 3 are being displayed on the information display 4, if the driver turns on the home button 7, the display of the surrounding images is also aborted and the home screen is displayed.

[0045] It should be noted that the home screen refers to, for example, a standby screen in which icons of various application software are arranged side by side. In addition, the information display 4 can also be constituted by, for example, a touch panel type display, and the home button 7, the rough road driving mode button 11, etc. are displayed on the information display 4.

[0046] The image display control unit 5 causes the surrounding images to be displayed on the information display 4 according to the operation of the driver and the execution state of the rough road driving assistance control.

[0047] When displaying the surrounding images, the image display control unit 5 changes the display control mode of the surrounding images displayed on the information display 4.

[0048] Specifically, the image display control unit 5 has a first display control mode and a second display control mode as display control modes. The first display control mode and the second display control mode are selected according to the execution state of the rough road driving assistance control.

[0049] The first display control mode starts when the rough road driving assistance control is not executed (when the normal driving control is executed), by the driver turning on the camera switch 6. If the first display control mode starts, the image display control unit 5 displays the surrounding image corresponding to the gear position of the shift lever 16 on the information display 4.

[0050] That is, when the forward drive gear is selected as the gear position, the image display control unit 5 displays the surrounding image captured by the front camera 3f on the information display 4. Among them, the image display control unit 5 stops displaying the surrounding image captured by the front camera 3f when the vehicle speed Vs becomes equal to or higher than the set vehicle speed Vset1 (for example, 20 km / h).

[0051] In addition, when the reverse drive gear is selected as the gear position, the image display control unit 5 displays the surrounding image captured by the rear camera 3r on the information display 4.

[0052] The second display control mode basically starts in conjunction with the start of the rough road driving assistance control. Therefore, when the rough road driving assistance control starts, the second display control mode starts without the driver operating the camera switch 6 to turn it on. If the second display control mode starts, the image display control unit 5 displays the surrounding image corresponding to the gear position of the shift lever 16 on the information display 4.

[0053] That is, when the forward drive gear is selected as the gear position, the image display control unit 5 displays the surrounding image captured by the front camera 3f on the information display 4. Among them, when the vehicle speed Vs becomes equal to or higher than the set vehicle speed Vset1 (for example, 20 km / h), the image display control unit 5 temporarily stops displaying the surrounding image captured by the front camera 3f. Furthermore, when the vehicle speed Vs becomes less than the set vehicle speed Vset2 (for example, 15 km / h) which is smaller than the set vehicle speed Vset1, the image display automatic control unit 5 automatically restarts the display of the temporarily stopped surrounding image.

[0054] In addition, when the reverse drive gear is selected as the gear position, the image display control unit 5 displays the surrounding image captured by the rear camera 3r on the information display 4.

[0055] Here, during the execution of the first display control mode, when the rough road driving mode button 11 is turned on (the rough road driving assistance control is executed), the image display control unit 5 switches the display control mode from the first display control mode to the second display control mode in conjunction with the execution of the rough road driving assistance control.

[0056] In addition, during the execution of the second display control mode or during the temporary suspension of the second display control mode, when the rough road driving assistance control is released, the image display control unit 5 suspends the second display control mode in conjunction with the release of the rough road driving assistance control.

[0057] Thus, in the present embodiment, the set vehicle speed Vset1 corresponds to a specific example of the first threshold value. In addition, the set vehicle speed Vset2 corresponds to a specific example of the second threshold value.

[0058] Furthermore, in the present embodiment, the image display control unit 5 corresponds to a specific example of an image display control device.

[0059] Next, regarding the display operation of the surrounding image of the vehicle 1 corresponding to the rough road driving assistance control state executed by the image display control unit 5 of the present embodiment, follow Figure 4 、 5 、the flowchart of the image display operation determination routine shown in FIG. 6 will be described. This routine is repeatedly executed at each set time.

[0060] As Figure 4 shown, when the routine starts, the image display control unit 5 first determines in step S101 whether 1 is set in the image display flag. The image display flag is a flag used for identification when displaying the surrounding image. Therefore, when the surrounding image is displayed on the information display 4 based on the driver's operation, the image display flag is set to 1.

[0061] In step S101, when it is determined that 1 is set in the image display flag (step S101: YES), the image display control unit 5 proceeds to step S106 described later.

[0062] On the other hand, in step S101, when it is determined that 1 is not set in the image display flag (step S101: NO), the image display control unit 5 proceeds to step S102.

[0063] In step S102, the image display control unit 5 determines whether the camera switch 6 has been turned on.

[0064] In step S102, when it is determined that the camera switch 6 has been turned on (step S102: YES), the image display control unit 5 proceeds to step S105 described later.

[0065] On the other hand, in step S102, when it is determined that the camera switch 6 has not been turned on (step S102: NO), the image display control unit 5 proceeds to step S103.

[0066] In step S103, the image display control unit 5 determines whether the current vehicle speed Vs is less than the set vehicle speed Vset1 (e.g., 20 km / h).

[0067] In step S103, when it is determined that the current vehicle speed Vs is equal to or greater than the set vehicle speed Vset1 (e.g., 20 km / h) (step S103: No), the image display control unit 5 proceeds to step S117 described below.

[0068] On the other hand, in step S103, when it is determined that the current vehicle speed Vs is less than the set vehicle speed Vset1 (e.g., 20 km / h) (step S103: Yes), the image display control unit 5 proceeds to step S104.

[0069] In step S104, the image display control unit 5 determines whether to start the rough road driving assistance control.

[0070] In step S104, when it is determined that the rough road driving assistance control has not been started (first display control mode) (step S104: No), the image display control unit 5 proceeds to step S117 described below.

[0071] On the other hand, in step S104, when it is determined that the rough road driving assistance control has been started (second display control mode) (step S104: Yes), the image display control unit 5 proceeds to step S105.

[0072] Then, if the image display control unit 5 proceeds from step S102 or step S104 to step S105, after setting the image display flag to 1, the image display control unit 5 proceeds to step S106.

[0073] If the image display control unit 5 proceeds from step S101 or step S105 to step S106, the image display control unit 5 determines whether the current vehicle speed Vs is greater than 40 km / h.

[0074] In step S106, when it is determined that the current vehicle speed Vs is greater than 40 km / h (step S106: Yes), the image display control unit 5 proceeds to step S108 described below. It should be noted that in this case, the image display control unit 5 cancels the rough road driving assistance control (first display control mode).

[0075] On the other hand, in step S106, when it is determined that the current vehicle speed Vs is 40 km / h or less (step S106: No), the image display control unit 5 proceeds to step S107.

[0076] In step S107, the image display control unit 5 determines whether the camera switch 6 has been turned off.

[0077] In step S107, when it is determined that the camera switch 6 has been turned off (step S107: Yes), the image display control unit 5 proceeds to step S108.

[0078] Then, if it proceeds from step S106 or step S107 to step S108, the image display control unit 5 clears the image display flag to 0 and then proceeds to step S117 described later.

[0079] On the other hand, in step S107, when it is determined that the camera switch 6 has not been turned off (step S107: No), the image display control unit 5 proceeds to step S109.

[0080] In step S109, as Figure 5 shown, the image display control unit 5 determines whether the rough road driving assistance control is in execution.

[0081] In step S109, when it is determined that the rough road driving assistance control is in execution (second display control mode) (step S109: Yes), the image display control unit 5 proceeds to step S112 described later.

[0082] On the other hand, in step S109, when it is determined that the rough road driving assistance control is not in execution (first display control mode) (step S109: No), the image display control unit 5 proceeds to step S110.

[0083] In step S110, the image display control unit 5 determines whether the vehicle speed Vs is equal to or higher than the set vehicle speed Vset1 (for example, 20 km / h).

[0084] In step S110, when it is determined that the vehicle speed Vs is lower than the set vehicle speed Vset1 (for example, 20 km / h) (step S110: No), the image display control unit 5 proceeds to step S117 described later.

[0085] On the other hand, in step S110, when it is determined that the vehicle speed Vs is equal to or higher than the set vehicle speed Vset1 (for example, 20 km / h) (step S110: Yes), the image display control unit 5 proceeds to step S111.

[0086] In step S111, the image display control unit 5 clears the image display flag to 0 and then proceeds to step S117 described later.

[0087] Then, if moving from step S109 to step S112, the image display control unit 5 determines whether 1 is set in the pause flag. The pause flag is a flag used for identification when pausing the display of the surrounding image in the second display control mode. Therefore, when the display of the surrounding image to the information display 4 is paused based on the driver's operation, the pause flag is set to 1.

[0088] In step S112, when it is determined that 1 is set in the pause flag (step S112: Yes), the image display control unit 5 moves to step S115 described below.

[0089] On the other hand, in step S112, when it is determined that 1 is not set in the pause flag (step S112: No), the image display control unit 5 moves to step S113.

[0090] In step S113, the image display control unit 5 determines whether the vehicle speed Vs is equal to or higher than the set vehicle speed Vset1 (for example, 20 km / h).

[0091] In step S113, when it is determined that the vehicle speed Vs is lower than the set vehicle speed Vset1 (for example, 20 km / h) (step S113: No), the image display control unit 5 moves to step S117 described below.

[0092] On the other hand, in step S113, when it is determined that the vehicle speed Vs is equal to or higher than the set vehicle speed Vset1 (for example, 20 km / h) (step S113: Yes), the image display control unit 5 moves to step S114.

[0093] In step S114, after setting 1 in the pause flag, the image display control unit 5 moves to step S117 described below.

[0094] In addition, if moving from step S112 to step S115, the image display control unit 5 determines whether the vehicle speed Vs is less than the set vehicle speed Vset2 (for example, 15 km / h).

[0095] In step S115, when it is determined that the vehicle speed Vs is equal to or higher than the set vehicle speed Vset2 (for example, 15 km / h) (step S115: No), the image display control unit 5 moves to step S117 described below.

[0096] On the other hand, in step S115, when it is determined that the vehicle speed Vs is less than the set vehicle speed Vset2 (for example, 15 km / h) (step S115: Yes), the image display control unit 5 moves to step S116.

[0097] If it moves to step S116, after the video display control unit 5 clears the pause flag to 0, it moves to step S117 described later.

[0098] Then, if it moves from step S103, step S104, step S108, step S110, step S111, step S113, step S114, step S115 or step S116 to step S117, as Figure 6 shown, the video display control unit 5 determines whether 1 is set in the video display flag.

[0099] In step S117, when it is determined that 1 is not set in the video display flag (step S117: NO), the video display control unit 5 moves to step S120 described later.

[0100] On the other hand, in step S117, when it is determined that 1 is set in the video display flag (step S117: YES), the video display control unit 5 moves to step S118.

[0101] In step S118, the video display control unit 5 determines whether the pause flag is cleared to 0.

[0102] In step S118, when it is determined that the pause flag is not cleared to 0 (step S118: NO), the video display control unit 5 moves to step S120 described later.

[0103] On the other hand, in step S118, when it is determined that the pause flag is cleared to 0 (step S118: YES), the video display control unit 5 moves to step S119.

[0104] In step S119, the video display control unit 5 determines whether the gear position detected by the gear position sensor 17 is the parking gear (P gear, etc.).

[0105] In step S119, when it is determined that the gear position is not the parking gear (P gear, etc.) (step S119: NO), the video display control unit 5 moves to step S121 described later.

[0106] On the other hand, in step S119, when it is determined that the gear position is the parking gear (P gear, etc.) (step S119: YES), the video display control unit 5 moves to step S120.

[0107] Then, if it moves from step S117, step S118 or step S119 to step S120, the video display control unit 5 sets the surrounding video not to be displayed and exits the routine.

[0108] In addition, if moving from step S119 to step S121, the image display control unit 5 determines whether the gear position is a forward driving gear (such as D gear, etc.).

[0109] In step S121, when it is determined that the gear position is a forward driving gear (such as D gear, etc.) (step S121: Yes), the image display control unit 5 moves to step S122.

[0110] If moving to step S122, after the image display control unit 5 displays the surrounding image in front captured by the front camera 3f, the routine exits.

[0111] On the other hand, in step S121, when it is determined that the gear position is not a forward driving gear (such as D gear, etc.) (step S121: No), the image display control unit 5 moves to step S123.

[0112] If moving to step S123, after the image display control unit 5 determines that the gear position is a reverse driving gear (R gear) and displays the surrounding image at the rear captured by the rear camera 3r, the routine exits.

[0113] According to such an embodiment, the vehicle image display device 2 is applied to a vehicle 1 capable of performing rough road driving assistance control, and includes: an in-vehicle camera 3 that captures the surrounding of the vehicle 1; an information display 4 that is used to display the surrounding image captured by the in-vehicle camera 3; a camera switch 6 that indicates the display of the surrounding image; and an image display control unit 5 that causes the surrounding image to be displayed on the information display 4 when the camera switch 6 is turned on. The image display control unit 5 has a first display control mode when canceling the rough road driving assistance control and a second display control mode when executing the rough road driving assistance control. During the execution of the first display control mode, when the vehicle speed Vs becomes equal to or higher than a first threshold value (Vset1), the display of the surrounding image is aborted. During the execution of the second display control mode, when the vehicle speed Vs becomes equal to or higher than the first threshold value (Vset1), the display of the surrounding image is temporarily stopped, and when the vehicle speed Vs becomes less than a second threshold value (Vset2) smaller than the first threshold value (Vset1), the temporarily stopped display of the surrounding image is restarted.

[0114] According to these configurations, the vehicle image display device 2 can achieve convenience and safety even when the vehicle speed Vs changes during rough road driving.

[0115] That is, in the first display control mode, when the vehicle speed Vs of the present vehicle becomes equal to or higher than a first threshold value (for example, 20 km / h), the image display control unit 5 stops displaying the surrounding image that has been displayed so far. That is, in the normal driving control where the change in the vehicle speed Vs of the present vehicle is small, the image display control unit 5 automatically turns off the surrounding image based on the vehicle speed Vs of the present vehicle. Therefore, the image display control unit 5 can reduce the cumbersome operations of the driver.

[0116] In addition, in the second display control mode, when the vehicle speed Vs of the present vehicle becomes equal to or higher than a first threshold value (for example, 20 km / h), the image display control unit 5 temporarily stops displaying the surrounding image. Further, when the vehicle speed Vs of the present vehicle is less than a second threshold value (for example, 15 km / h), the image display control unit 5 automatically restarts the display of the surrounding image that has been temporarily stopped. Thus, in the bad road driving assistance control where the vehicle speed Vs of the present vehicle is likely to change significantly, even when the vehicle speed Vs changes, the image display control unit 5 can automatically turn on / off the display of the surrounding image within a predetermined vehicle speed range (for example, 40 km / h or less). Therefore, the image display control unit 5 can further reduce the cumbersome operations of the driver.

[0117] In addition, the second threshold value is set to be smaller than the first threshold value. Thus, the image display control unit 5 can suppress the fluctuations when the display of the surrounding image is automatically turned on / off based on the change in the vehicle speed Vs of the present vehicle. Therefore, the image display control unit 5 can realize a display switching operation that does not cause a sense of discomfort to the driver.

[0118] Furthermore, if the bad road driving mode button 11 is turned on when the vehicle speed Vs of the present vehicle is less than the first threshold value (for example, 20 km / h), the image display control unit 5 starts the second display control mode in conjunction with the turn-on operation (start of the bad road driving assistance control). Thus, the image display control unit 5 can eliminate the operation of the camera switch 6 by the driver when displaying the surrounding image during the bad road driving assistance control. Therefore, the image display control unit 5 can further reduce the cumbersome operations of the driver.

[0119] In addition, during the execution of the first display control mode, when the bad road driving mode button 11 is turned on (the bad road driving assistance control is executed), the image display control unit 5 switches the display control mode from the first display control mode to the second display control mode in conjunction with the execution of the bad road driving assistance control. Thus, after switching to the bad road driving assistance control, the image display control unit 5 can also display the surrounding image displayed during the normal driving control as it is on the information display 4. Therefore, the image display control unit 5 can improve the convenience for the driver when switching from the normal driving control to the bad road driving assistance control.

[0120] In addition, when the image display control unit 5 is executing the second display control mode or is temporarily stopped from the second display control mode, when the rough road driving assistance control is canceled, the second display control mode is canceled in conjunction with the cancellation of the rough road driving assistance control. Thereby, the image display control unit 5 can suppress unnecessary display on the information display 4. Therefore, the image display control unit 5 can achieve appropriate display according to the driver's intention.

[0121] It should be noted that, in the present embodiment, although the front camera 3f and the rear camera 3r are described as an example of the configuration of the in-vehicle camera 3, a pair of left and right side cameras capable of photographing a range that becomes a blind spot on the side of the vehicle body may also be provided. In this case, it is also possible to display a peripheral image on the side of the vehicle 1 or an overhead image used in the peripheral images of these multiple cameras (front camera 3f / rear camera 3r / pair of side cameras) on the information display 4. That is, in the present embodiment, although the peripheral images in front of and behind the vehicle 1 are described as an example of the images displayed on the information display 4, various images such as peripheral images on the side of the vehicle 1 and overhead images can also be appropriately displayed.

[0122] In addition, in the above-described embodiment, the image display control unit 5, the driving control unit 10, etc. are configured by a known microcomputer such as a CPU, a RAM, a ROM, a non-volatile memory, and its peripheral devices, and programs executed by the CPU and / or fixed data such as data tables are pre-stored in the ROM. It should be noted that all or part of the functions of the processor may be constituted by a logic circuit or an analog circuit, and various program processes may also be implemented by an electronic circuit such as an FPGA.

[0123] The invention described in the above embodiment is not limited to these embodiments, and various modifications can be made without departing from the gist thereof at the implementation stage. Furthermore, in the above embodiments, which include inventions at various stages, various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

[0124] In addition, in a case where the problem can be solved and the effect can be obtained even if several constituent elements are deleted from all the constituent elements shown in the above embodiment, the configuration from which the constituent elements are deleted can be extracted as an invention.

Claims

1. A vehicle image display device, characterized in that: The present invention is an image display device applied to a vehicle capable of performing bad road driving assistance control by at least one of driving force distribution control for wheels and braking force distribution control for the wheels. The vehicle image display device comprises: A photographing device for photographing the periphery of the vehicle; An image display device, which is used to display the surrounding images captured by the shooting device; an image display switch, which instructs the display of the peripheral image; and an image display control device that causes the peripheral image to be displayed on the image display device when the image display switch is turned on; The image display control device has a first display control mode when the bad road driving assist control is released and a second display control mode when the bad road driving assist control is executed as display control modes, The image display control device stops displaying the surrounding image when the vehicle speed becomes equal to or greater than a first threshold value during execution of the first display control mode. During execution of the second display control mode, the image display control device temporarily stops displaying the surrounding image when the vehicle speed becomes greater than the first threshold, and restarts displaying the temporarily stopped surrounding image when the vehicle speed becomes less than a second threshold that is smaller than the first threshold.

2. The vehicle image display device according to claim 1, characterized in that: The image display control device switches from the first display control mode to the second display control mode in conjunction with the execution of the bad road driving assist control when the bad road driving assist control is executed during the execution of the first display control mode.

3. The vehicle image display device according to claim 1, characterized in that: When the bad road driving assist control is released during execution of the second display control mode or during the temporary suspension of the second display control mode, the image display control device stops the second display control mode in conjunction with the release of the bad road driving assist control.

4. The vehicle image display device according to claim 1, characterized in that: If the bad road driving assist control is started when the vehicle speed is lower than the first threshold, the image display control device starts the second display control mode in conjunction with the start of the bad road driving assist control.

5. The vehicle image display device according to claim 1, characterized in that: In the first display control mode and the second display control mode, the peripheral images displayed on the image display device are peripheral images photographed by the same photographing device.

6. A vehicle image display device, characterized in that: The present invention is an image display device applied to a vehicle capable of performing bad road driving assistance control by at least one of driving force distribution control for wheels and braking force distribution control for the wheels. The vehicle image display device comprises: A shooting module, which shoots the surroundings of the vehicle; An image display module, which displays the surrounding image captured by the shooting module; An image display switch, which indicates the display of the surrounding image; as well as a processor, which, when the image display switch is turned on, causes the peripheral image to be displayed on the image display module, The processor stops displaying the surrounding image when the vehicle speed becomes equal to or greater than a first threshold value during the cancellation of the bad road driving assist control. During execution of the bad road driving assist control, the processor temporarily stops displaying the surrounding image when the vehicle speed becomes greater than or equal to the first threshold, and restarts displaying the temporarily stopped surrounding image when the vehicle speed becomes less than a second threshold that is smaller than the first threshold.

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