Display controller and picture display system

Abstract

To provide a display controller and a picture display system which can reduce display of unnecessary parts.SOLUTION: An acquisition unit 50 acquires picture data showing a picture of the back side of the motor cycle taken by an imaging device. A detection unit 52 detects a travel position in a traffic lane in the direction of the width of a vehicle. A control unit 54 performs control to display a picture based on picture data acquired by the acquisition unit 50 in a display unit of a display device and to change the display range of the picture taken according to the result of detection by the detection unit 52 and display the picture in the display unit 40.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a display control device and a video display system. [Background technology]

[0002] Patent Document 1 proposes a motorcycle visual confirmation device having an imaging means, a display means for displaying a display range that is a cut-out portion of the imaging range captured by the imaging means, an operation means equipped with an operation unit that can be operated up and down and left and right, and a control means for flashing a turn signal when the operation unit is operated to the left or right, and for changing the display range when the operation unit is operated upward or downward.

[0003] Patent Document 2 also proposes an information providing device that includes an image acquisition unit for acquiring an image of the road on which the vehicle is traveling, a lane detection unit for detecting at least one of a left lane and a right lane from the image of the road acquired by the image acquisition unit, and detecting a radius of curvature or a first value related thereto of the detected at least one lane, and a lateral distance from the vehicle to the at least one lane or a second value related thereto, a vehicle trajectory curvature calculation unit for calculating a radius of curvature or a value related thereto of the vehicle trajectory based on the first value and the second value in the at least one lane, a vehicle speed acquisition unit for acquiring the speed of the vehicle, a vehicle physical quantity calculation unit for calculating a physical quantity related to the turning of the vehicle based on the radius of curvature or a value related thereto of the vehicle trajectory and the vehicle speed, a warning determination unit for determining whether or not to issue a warning based on the physical quantity related to the turning of the vehicle, and a warning signal generation unit for generating a warning signal when the warning determination unit determines that a warning should be issued. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-284956 A [Patent Document 2] International Publication No. 2016 / 017297 Summary of the Invention [Problem to be solved by the invention]

[0005] Since motorcycles are narrow and have a degree of freedom in their position within the lane, they may drive to the left or right of the lane. When a motorcycle drives to the left or right of the lane, a large amount of unnecessary parts, such as walls and median strips, are captured in the rear image, so it is desirable to reduce the reflection of unnecessary parts.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a display control device and a video display system capable of reducing the reflection of unwanted parts. [Means for solving the problem]

[0007] In order to achieve the above object, a display control device according to a first aspect includes an acquisition unit that acquires video data representing an image captured by an imaging device that captures an image behind a motorcycle, a detection unit that detects the traveling position of the motorcycle in the vehicle width direction within a lane, and a control unit that controls the display of the image based on the video data acquired by the acquisition unit, and controls the display of the image by changing the display range according to the detection result of the detection unit.

[0008] According to the first aspect, the acquisition unit acquires image data representing an image captured by an imaging device that captures an image of the rear of the motorcycle, and the detection unit detects the motorcycle's traveling position in the vehicle width direction within the lane.

[0009] The control unit controls the display of an image based on the image data acquired by the acquisition unit, and controls the display range of the image to be changed according to the detection result of the detection unit, thereby making it possible to reduce the reflection of unnecessary parts such as walls and median strips when displayed.

[0010] A display control device according to a second aspect is a display control device according to the first aspect, wherein the control unit changes the display range by changing the cut-out range of the image acquired by the acquisition unit or by changing the imaging direction of the imaging device.

[0011] According to the second aspect, it is possible to change the display range of the video.

[0012] A display control device according to a third aspect is a display control device according to the first or second aspect, wherein when a vehicle is traveling on a one-lane road opposite an oncoming lane, the control unit changes the display range so that the oncoming lane is displayed more than the other areas, and when the vehicle is traveling closer to the oncoming lane, the control unit changes the display range so that the opposite side of the oncoming lane is displayed more than the other areas.

[0013] According to the third aspect, when a vehicle is traveling on a single lane road near the opposite side of the oncoming lane, the display range is changed so that the oncoming lane is displayed more than the other areas, thereby reducing the reflection of unnecessary parts such as walls. Also, when a vehicle is traveling near the oncoming lane, the display range is changed so that the opposite side of the oncoming lane is displayed more than the other areas, thereby reducing the reflection of unnecessary parts such as a median strip.

[0014] A display control device according to a fourth aspect is a display control device according to any one of the first to third aspects, wherein the control unit, when driving in the lane farthest from the oncoming lane among multiple lanes on one side and toward the opposite side of the oncoming lane, changes the display range so that the oncoming lane is displayed more than the other areas, and when driving in the lane closest to the oncoming lane among multiple lanes on one side and toward the oncoming lane, changes the display range so that the opposite side of the oncoming lane is displayed more than the other areas.

[0015] According to the fourth aspect, even on a road with multiple lanes in each direction, it is possible to reduce the reflection of unnecessary parts such as walls and medians.

[0016] A display control device according to a fifth aspect is a display control device according to any one of the first to fourth aspects, in which the control unit displays the image without any left or right bias with the vehicle directly behind as the center when the vehicle is traveling in a driving position other than when the vehicle is traveling in the lane farthest from the oncoming lane among multiple lanes on each side, and when the vehicle is traveling in the lane closest to the oncoming lane, and closer to the oncoming lane.

[0017] According to the fifth aspect, unnecessary changes to the display range can be suppressed while traveling on a road with multiple lanes in each direction.

[0018] A display control device according to a sixth aspect is a display control device according to any one of the first to fifth aspects, wherein the detection unit detects the driving position by image recognition based on the video data, or detects the driving position based on information from an information processing device that performs processing to locate the vehicle position and correspond it to map information.

[0019] According to the sixth aspect, it is possible to detect the traveling position of the motorcycle in the vehicle width direction within the lane in which the motorcycle is traveling.

[0020] An image display system according to a seventh aspect includes the display control device according to claim 1, the imaging device, and a display device that displays the image.

[0021] According to the seventh aspect, it is possible to provide a video display system capable of reducing the reflection of unwanted parts. Effect of the Invention

[0022] As described above, the present invention has an advantage of providing a display control device and a video display system capable of reducing the reflection of unwanted parts. [Brief description of the drawings]

[0023] [Figure 1] 1 is a schematic diagram showing an example of a configuration of a video display system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing an example of the arrangement of a display device and an operation device. [Diagram 3] 2 is a block diagram showing an example of an electrical configuration of the video display system according to the present embodiment. FIG. [Figure 4] FIG. 2 is a functional block diagram showing an example of a functional configuration of a control device according to the present embodiment. [Diagram 5] 5 is a flowchart showing an example of the flow of processing performed by a control unit of the image display system according to the present embodiment by executing an "image display program." [Figure 6] FIG. 13 is a diagram showing the display range when the vehicle is traveling on the opposite side of the oncoming lane (to the left when driving on the left side of the road) in a one-lane road. [Figure 7] This is a diagram showing the display range when driving near the center of a single lane on a road. [Figure 8] FIG. 13 is a diagram showing the display range when driving near the oncoming lane (to the right when driving on the left) on a road with one lane in each direction. [Figure 9] FIG. 13 is a diagram showing the display range when the vehicle is traveling on the opposite side of the oncoming lane in a lane farthest from the oncoming lane in a multi-lane road on one side. [Figure 10] FIG. 13 is a diagram showing the display range when the vehicle is traveling close to the oncoming lane in a lane with multiple lanes on each side. [Figure 11] FIG. 13 is a diagram showing the display range when the vehicle is traveling near the center of a lane that is farthest from an oncoming lane on a road with multiple lanes on each side. [Figure 12] FIG. 13 is a diagram showing the display range when the vehicle is traveling close to the oncoming lane of a road with multiple lanes on one side, the lane being the furthest from the oncoming lane. [Figure 13] FIG. 13 is a diagram showing the display range when the vehicle is traveling on the opposite side of the oncoming lane in a lane closest to the oncoming lane in a road with multiple lanes on each side. [Figure 14] FIG. 13 is a diagram showing the display range when the vehicle is traveling near the center of a lane that is closest to the oncoming lane in a road with multiple lanes on one side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An example of an embodiment of the present invention will be described in detail below with reference to the drawings. The image display system of the present disclosure is an image display system for a motorcycle, and displays an image behind the vehicle to the rider. Here, "motorcycle" refers to a two-wheeled motor vehicle, three-wheeled motor vehicle, or four-wheeled motor vehicle among saddle-riding vehicles on which a rider straddles. Motorcycles include those that use an engine as a drive source and those that use a motor as a drive source. Examples of motorcycles include motorcycles, scooters, and electric scooters. Below, a case where the motorcycle is a two-wheeled motor vehicle will be described.

[0025] (Video display system configuration) First, the configuration of the image display system will be described. Fig. 1 is a schematic diagram showing an example of the configuration of the image display system according to this embodiment.

[0026] As shown in Fig. 1, the image display system 10 includes an imaging device 12, a display device 14, a control device 16 as an example of a display control device, and an operation device 18. Although Fig. 1 illustrates one of each device, a plurality of imaging devices 12, display devices 14, and operation devices 18 may be provided.

[0027] The imaging device 12 is provided at the rear of the motorcycle body 11 and captures an image of the rear of the vehicle. The imaging device 12 may be a camera with a viewing angle of less than 60 degrees, or a camera equipped with a wide-angle lens with a viewing angle of 60 degrees or more. As the imaging device 12, for example, a digital video camera equipped with an image sensor such as a CCD image sensor or a CMOS image sensor can be used.

[0028] The display device 14 displays an image of the rear of the vehicle captured by the imaging device 12. As a display unit 40 (see FIG. 3) of the display device 14, for example, a liquid crystal display, an organic EL display, a touch panel display configured by overlaying a touch panel on such a display, or the like can be used. The display device 14 is installed in a position in front of the rider where it is easy to see.

[0029] The display device 14 may be a display mounted on the instrument panel of the vehicle body 11, or a display that is attached later. For example, as shown in FIG. 2, when a mounted display is used, the display device 14 can be disposed in the center of the instrument panel. When a display is attached later, the display device 14 can be disposed near the meter display. In this case, the distance from the rider to the instruments (e.g., the meter display) is made approximately the same as the distance from the rider to the display device 14, making it easier for the rider to focus.

[0030] The control device 16 is an electronic control unit (ECU) provided for controlling the display device 14. The control device 16 is installed inside the vehicle body 11, for example, by being embedded inside a seat.

[0031] The operation device 18 is a device that allows the rider to perform operation input. A handlebar switch or the like that is attached near the handlebar can be used as the operation device 18. The handlebar switch allows operation input even while riding. The operation device 18 is, for example, a push button type switch as shown in FIG. 2, and can be attached to the left grip. Also, as described later, a turn switch can also be used as the operation device 18.

[0032] (Electrical configuration of the video display system) Next, the electrical configuration of the image display system 10 will be described with reference to Fig. 3. Fig. 3 is a block diagram showing an example of the electrical configuration of the image display system 10 according to this embodiment.

[0033] The control device 16 includes a CPU (Central Processing Unit) 30, a ROM (Read Only Memory) 32, a RAM (Random Access Memory) 34, and a non-volatile memory 36. A "video display program" (described later) is pre-stored in the ROM 32 or the non-volatile memory 36. The CPU 30 reads out the pre-stored program and executes the program using the RAM 34 as a work area.

[0034] The imaging device 12, the display device 14, and the operation device 18 are connected to the control device 16 by wire or wirelessly so as to transmit and receive data to and from the control device 16. In addition, the various sensors 20, the communication unit 22, and the storage unit 24 are also connected to the control device 16 by wire or wirelessly so as to transmit and receive data to and from the control device 16. The control device 16 transmits and receives information to and from each unit, and controls each unit.

[0035] The sensor 20 detects various driving conditions of the vehicle. For example, the sensor 20 may be a tilt sensor that detects the tilt of the vehicle body 11, a vehicle speed sensor that detects the vehicle speed, an acceleration sensor that detects the acceleration, or other sensors. The driving conditions detected by the sensor 20 include a stopped state where the ignition switch is turned on and the vehicle speed is 0. The communication unit 22 is an interface for communicating with an external device 28. The storage unit 24 stores data such as image data of various screens described later. For the storage unit 24, various storage media such as a hard disk drive (HDD) and a memory card (e.g., an SD card) may be used. The control device 16 is housed in a case together with the communication unit 22 and the storage unit 24, and is installed inside the vehicle body 11 as an ECU.

[0036] The display device 14 includes a display unit 40, an operation unit 42, a sensor 44, and a speaker 46. The display unit 40 is a display for displaying images based on image data. The operation unit 42 is a switch or button for inputting operations. The sensor 44 is an acceleration sensor for detecting the orientation of the display device 14. The speaker 46 is a device for outputting sound based on audio data.

[0037] The above-described configuration is an example, and other components may be added, or some components may be omitted. For example, the image display system 10 may include a microphone 26 for collecting sounds around the vehicle. The microphone 26 may be, for example, a microphone built into the imaging device 12 as shown in the figure.

[0038] Here, the operation of the image display system 10 will be briefly described. An image of the rear of the vehicle is captured by the imaging device 12, and the obtained image data is output to the control device 16. The control device 16 processes the obtained image data and outputs it to the display device 14. The display device 14 displays the image based on the obtained image data. Note that in this embodiment, a part of the image represented by the image data is cut out and displayed, and the display range can be changed by changing the cut-out range of the image.

[0039] In addition, the control device 16 controls the display device 14 to display an image based on the image data captured by the imaging device 12, and controls the display range of the captured image to be changed depending on the vehicle's widthwise position within the lane.

[0040] Furthermore, the rider can give various instructions via the operation device 18, such as an instruction to switch the screen displayed on the display device 14. In response to an instruction from the rider, the control device 16 changes the display range, for example, to a screen that displays an image centered on the area directly behind the vehicle, a screen that displays more of the left side of the vehicle than the right side, a screen that displays more of the right side of the vehicle than the left side, etc. Note that the operation input by the rider can be performed via the operation unit 42 of the display device 14, or can be performed via an operation screen displayed on the display unit 40 of the display device 14.

[0041] The image display system 10 may also function as a drive recorder that records image data obtained from the imaging device 12. In this case, the control device 16 also performs processing to store the image data in a storage device inside or outside the vehicle. In the case where multiple imaging devices are provided, multiple image data obtained from the devices at the same time are stored in the storage device in association with each other. Alternatively, composite image data representing a composite image of multiple images may be generated and the composite image data may be stored in the storage device.

[0042] The video data may be stored in the storage unit 24, or may be transmitted to the outside via the communication unit 22 and stored in an external storage device. For example, the video data may be stored in a personal computer, smartphone, or the like of the rider or other users.

[0043] Furthermore, the image display system 10 may record data representing the situation around the vehicle in association with the image data. Examples of the data representing the situation around the vehicle include audio data and data from various sensors.

[0044] For example, the video display system 10 may include a microphone 26 for collecting sounds around the vehicle. The microphone 26 may be, for example, a microphone built into the imaging device 12 as shown in the figure, or may be a microphone that is attached later. Sound data obtained at the same time as the video data may be stored in the storage unit 24 in association with the video data.

[0045] (Functional configuration of the control device) Next, the functional configuration of the control device 16 will be described with reference to Fig. 4. Fig. 4 is a functional block diagram showing an example of the functional configuration of the control device 16 according to this embodiment.

[0046] The control device 16 has the functions of an acquisition unit 50, a detection unit 52, and a control unit 54, and these functions are realized by the CPU 30 loading a display control program stored in the ROM 34 into the RAM 34 and executing it.

[0047] The acquisition unit 50 acquires image data representing an image captured by the imaging device 12 behind the motorcycle.

[0048] The detection unit 52 detects the traveling position in the vehicle width direction within the lane in which the motorcycle is traveling. In this embodiment, the detection unit 52 detects the traveling lane by, for example, image recognition from video data, and detects the traveling position within the lane. When detecting the traveling position by image recognition, the detection unit 52 may recognize the white lines and at least one of the guard rails and the sidewalk. For example, by recognizing the white lines, it is possible to detect the number of lanes and the traveling position within the lane, and by recognizing the guard rails or the sidewalk, it is possible to detect which lane the motorcycle is traveling in.

[0049] The control unit 54 controls the display of an image based on the image data acquired by the acquisition unit 50 on the display unit 40 of the display device 14. The control unit 54 also controls the display of the image on the display unit 40 by changing the display range of the captured image according to the detection result of the detection unit 52. Although details will be described later, in this embodiment, the control is performed to change and display the display range according to the driving lane position (driving lane position in the case of multiple driving lanes) and the driving position in the vehicle width direction within the lane. Note that when changing the display range, the change may be made gradually. By making the change gradually, it is possible to reduce the sense of incongruity caused by the change in the display range. The execution or non-execution of the control to change and display the display range may be switched on and off by a handle switch of the operation device 18 or the like.

[0050] (Video display program) Next, the video display program will be described with reference to Fig. 5. Fig. 5 is a flow chart showing an example of the flow of processing performed by the control unit 54 of the video display system 10 according to this embodiment executing the "video display program." Note that the video display program is executed by the CPU 30 of the control device 16, and starts, for example, when the display device 14 is turned on.

[0051] In step 100, the CPU 30 starts acquiring a captured rear image, and the process proceeds to step 102. That is, the acquisition unit 50 starts acquiring image data representing an image captured by the imaging device 12 behind the motorcycle.

[0052] In step 102, the CPU 30 starts displaying an image, and the process proceeds to step 104. That is, the control unit 54 starts control to display an image on the display unit 40 of the display device 14, based on the image data acquired by the acquisition unit 50.

[0053] In step 104, the CPU 30 detects the vehicle width direction position within the lane and proceeds to step 106. That is, the detection unit 52 detects the vehicle width direction traveling position within the lane in which the motorcycle is traveling. The detection unit 52 detects the traveling lane by image recognition from the video data, for example, and detects the traveling position within the lane. The detection unit 52 also detects whether the road has one lane on one side or multiple lanes on one side.

[0054] In step 106, CPU 30 judges whether the detected position is a position where the display range is to be changed. For example, in the case of a single lane on each side, the judgment is made by judging whether the vehicle is traveling to the left or right of the center position in the lane. In the case of multiple lanes on each side, the judgment is made by judging whether the vehicle is traveling in the lane closest to the oncoming lane and close to the oncoming lane, or in the lane farthest from the oncoming lane and close to the opposite side of the oncoming lane. If the judgment is affirmative, the process proceeds to step 108, and if not, the process proceeds to step 110.

[0055] In step 108, the CPU 30 performs a display range change process and proceeds to step 114. That is, the control unit 54 performs control to change the display range of the captured image according to the detection result of the detection unit 52 and display it on the display unit 40. At this time, for example, the display range is changed and displayed based on the driving lane position (driving lane position in the case of multiple driving lanes) in addition to the driving position in the vehicle width direction in the lane. Specifically, in the display range change process, when the vehicle is driving on the opposite side of the oncoming lane in a lane with one lane on each side, the display range is changed so that the oncoming lane side is displayed more than the other side. When the vehicle is driving on the opposite side of the oncoming lane in a lane with one lane on each side, the display range is changed so that the opposite side of the oncoming lane is displayed more than the other side. When the vehicle is driving on the opposite side of the oncoming lane in a lane farthest from the oncoming lane in a lane with multiple lanes on each side, the display range is changed so that the oncoming lane side is displayed more than the other side. When the vehicle is traveling in the lane closest to the oncoming lane of a road with multiple lanes on each side, and is driving close to the oncoming lane, the display range is changed so that the oncoming lane and the opposite side are displayed more than the other lanes.

[0056] On the other hand, in step 110, it is determined whether the display range is being changed. This is done by determining whether the processing of step 108 has already been performed and the display range has been changed. If the determination is affirmative, the process proceeds to step 112, and if not, the process proceeds to step 114.

[0057] In step 112, CPU 30 changes the display range to a normal display range (a display range with no left / right bias with directly behind as the center) and proceeds to step 114. In other words, the rear image is displayed so that the display range is balanced and symmetrical with directly behind as the center.

[0058] In step 114, the CPU 30 judges whether or not to end the display. For example, the judgment is made by judging whether or not the display device 14 has been turned off. If the judgment is negative, the process returns to step 104 and the above-mentioned processing is repeated, and if the judgment is positive, the series of processing is terminated.

[0059] Next, the control of changing the display range, which is performed by the control unit 54 executing the above-mentioned video display program, will be described in detail with a specific example.

[0060] First, the case where the vehicle is traveling on a road with one lane on each side will be described with reference to Figs. 6 to 8. Fig. 6 is a diagram showing the display range when the vehicle is traveling on the side opposite the oncoming lane in a one lane road (to the left when driving on the left side). Fig. 7 is a diagram showing the display range when the vehicle is traveling near the center of a one lane road. Fig. 8 is a diagram showing the display range when the vehicle is traveling on the side closer to the oncoming lane in a one lane road (to the right when driving on the left side).

[0061] When driving on the opposite side of the oncoming lane in a single lane, the shoulder of the road becomes an unnecessary part if a wall 60 or the like is displayed, so the display range is changed so that the oncoming lane is displayed more than the other parts, as shown in Figure 6. This reduces the proportion of unnecessary parts such as the wall 60, and makes it possible to expand the area you want to see.

[0062] In addition, when the vehicle is traveling near the center of a single lane on a road, the display will be centered directly behind the vehicle and will not be biased to the left or right, as shown in Figure 7.

[0063] In addition, when driving on the side of the oncoming lane in a single lane, the user wants to check the area behind the lane they are driving in, so the display range is changed so that the area opposite the oncoming lane is displayed more than anything else, as shown in Figure 8. This makes it possible to enlarge the area that the user wants to see.

[0064] Next, the case of traveling on a road with multiple lanes on one side will be described with reference to Figs. 9 to 14. Fig. 9 is a diagram showing the display range when traveling on the lane farthest from the oncoming lane of a road with multiple lanes on one side, close to the oncoming lane. Fig. 10 is a diagram showing the display range when traveling on the lane closest to the oncoming lane of a road with multiple lanes on one side, close to the oncoming lane. Fig. 11 is a diagram showing the display range when traveling near the center of the lane farthest from the oncoming lane of a road with multiple lanes on one side. Fig. 12 is a diagram showing the display range when traveling near the oncoming lane of the lane farthest from the oncoming lane of a road with multiple lanes on one side. Fig. 13 is a diagram showing the display range when traveling on the lane closest to the oncoming lane of a road with multiple lanes on one side, close to the oncoming lane. Fig. 14 is a diagram showing the display range when traveling near the center of the lane closest to the oncoming lane of a road with multiple lanes on one side. 9 to 14, an example of a road with two lanes on one side is shown, and the display range is indicated by a triangular screen tone in each figure.

[0065] When driving on the opposite side of the oncoming lane in a road with multiple lanes on each side, in the lane farthest from the oncoming lane, the display range is changed so that the oncoming lane side is displayed more than the other side, since the shoulder side of the road would be an unnecessary part if a wall 60 or the like were displayed, as shown in Figure 9. This reduces the proportion of unnecessary parts such as the wall 60, making it possible to expand the area you want to see.

[0066] When driving close to the oncoming lane in a road with multiple lanes on each side, the oncoming lane becomes an unnecessary part if the center divider 62 or the like is displayed, so the display range is changed so that the opposite side to the oncoming lane is displayed more than the other parts, as shown in Figure 10. This reduces the proportion of unnecessary parts such as the center divider 62, making it possible to expand the area you want to see.

[0067] When the vehicle is traveling near the center of a lane that is farthest from the oncoming lane on a road with multiple lanes on each side, the display range is centered directly behind the vehicle and is not biased to the left or right, as shown in Figure 11.

[0068] When the vehicle is traveling close to the oncoming lane of a road with multiple lanes on each side, the lane furthest from the oncoming lane, the display range is centered directly behind the vehicle and is not biased to the left or right, as shown in FIG. 12.

[0069] When the vehicle is traveling in the lane closest to the oncoming lane on a road with multiple lanes on each side, and is traveling on the opposite side of the oncoming lane, the display range is centered directly behind the vehicle and is not biased to the left or right, as shown in Figure 13.

[0070] When the vehicle is traveling near the center of a lane closest to the oncoming lane on a road with multiple lanes on each side, the display range is centered directly behind the vehicle and is balanced to the left and right, as shown in FIG. 14.

[0071] In the case of multiple lanes with three or more lanes on each side, for lanes other than those mentioned above, the display range is displayed with no left / right bias with the rear at the center, as in the case of Figures 11 to 14. That is, when the vehicle is traveling in a driving position other than when the vehicle is traveling on the side opposite the oncoming lane in the lane farthest from the oncoming lane of multiple lanes on each side, or when the vehicle is traveling on the side closer to the oncoming lane in the lane closest to the oncoming lane, the display is displayed with no left / right bias with the rear at the center.

[0072] In this way, by performing the display range change process, it is possible to reduce the proportion of unnecessary parts such as the wall 60 and the median strip 62 that are displayed, and to enlarge the area that the viewer wants to see.

[0073] However, when turning right or left or changing lanes, etc., the side of the turn is displayed more widely when linked to the turn. Also, in Figs. 9 to 14, two lanes on each side are used for the explanation, but if there are multiple lanes traveling in the same direction, the display range can be changed from the normal display range (a display range with no left or right bias centered directly behind) when traveling on the opposite side of the oncoming lane in the lane farthest from the oncoming lane, and when traveling on the closer side to the oncoming lane in the lane closest to the oncoming lane. This can reduce the sense of incongruity caused by the change in range.

[0074] In the above embodiment, an example has been described in which a part of an area is cut out from an image represented by video data and displayed, and the cut-out range is changed to change the display range, but the method of changing the display range is not limited to this. For example, the imaging device 12 may be made rotatable, and the imaging range may be changed by rotating the imaging device 12 to change the imaging direction.

[0075] In the above embodiment, the detection unit 52 detects the motorcycle's travel position in the vehicle width direction within the lane by image recognition, but the method of detecting the travel position within the lane is not limited to this. For example, when an information processing device that measures the vehicle position and corresponds it to map information, which is included in a navigation device, is provided, the travel position within the lane may be detected based on information from the information processing device. Specifically, the number of lanes is detected from the map information, and the travel position within the lane is detected from the vehicle's position on the map.

[0076] Furthermore, in the above embodiment, if the image display system 10 functions as a drive recorder, when the display range is changed, the image after the display range is changed may be recorded.

[0077] In the above embodiment, the display device 14 is installed in the meter display of the instrument panel, but the display device 14 may be installed in a position that is easy for a rider in front of the rider to see, regardless of whether a meter display is present or not. For example, the display device 14 may be installed on the handlebars, in a mirror mounting portion, on top of the fuel tank, inside the cowl, or above the meter display.

[0078] In the above embodiment, an example in which a dedicated display device 14 is provided has been described, but a portable information processing device such as a smartphone or tablet may be used as the display device 14. In this case, the portable information processing device executes various processes by using a dedicated application program pre-installed and working with an ECU, which is the control device 16. For example, a smartphone is wirelessly connected to the communication unit 22 by short-range wireless communication such as Wi-Fi (registered trademark) or Bluetooth (registered trademark), and can display an image based on the image data stored in the storage unit 24 on the screen of the portable information processing device.

[0079] In addition, the processing performed by the control device 16 in each of the above embodiments has been described as software processing performed by executing a program, but is not limited to this. For example, the processing may be performed by hardware such as a GPU (Graphics Processing Unit), an ASIC (Application Specific Integrated Circuit), and an FPGA (Field-Programmable Gate Array). Alternatively, the processing may be a combination of both software and hardware. In the case of software processing, the program may be stored in various storage media and distributed.

[0080] Furthermore, the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0081] 10 image display system, 11 vehicle body, 12 imaging device, 14 display device, 16 control device, 30 CPU, 50 acquisition unit, 52 detection unit, 54 control unit, 60 wall, 62 median strip

Claims

1. an acquisition unit that acquires image data representing an image captured by an imaging device that captures an image of the rear of the motorcycle; a detection unit for detecting a traveling position of the motorcycle in a vehicle width direction within a lane; a control unit that controls displaying the image based on the image data acquired by the acquisition unit, and controls changing and displaying a display range of the image in accordance with a detection result of the detection unit; A display control device comprising:

2. The display control device according to claim 1 , wherein the control unit changes the display range by changing a range cut out of the image acquired by the acquisition unit or by changing an imaging direction of the imaging device.

3. 2. The display control device according to claim 1, wherein the control unit changes the display range so that the oncoming lane is displayed more than the other areas when the vehicle is traveling on a one-lane road opposite the oncoming lane, and changes the display range so that the opposite side of the oncoming lane is displayed more than the other areas when the vehicle is traveling closer to the oncoming lane.

4. 2. The display control device according to claim 1, wherein the control unit changes the display range so that the oncoming lane is displayed more than the other areas when the vehicle is traveling in the lane farthest from the oncoming lane among multiple lanes on one side and toward the opposite side of the oncoming lane, and changes the display range so that the opposite side of the oncoming lane is displayed more than the other areas when the vehicle is traveling in the lane closest to the oncoming lane among multiple lanes on one side and toward the oncoming lane.

5. The display control device according to claim 1, wherein the control unit displays the vehicle so as not to be biased to the left or right with the vehicle directly behind as the center when the vehicle is traveling in a driving position other than when the vehicle is traveling in the lane farthest from the oncoming lane in a road with multiple lanes on one side, and when the vehicle is traveling in the lane closest to the oncoming lane, and closer to the oncoming lane.

6. The display control device according to claim 1 , wherein the detection unit detects the driving position by image recognition based on the video data, or detects the driving position based on information from an information processing device that performs processing to locate the vehicle's position and correspond it to map information.

7. A display control device according to claim 1 ; The imaging device; A display device for displaying the image; and A video display system comprising:

Images