JP2012173269A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for picking up a spot needs to be registered as a front camera start registered spot and presenting it to a user.SOLUTION: Control means performs control of generating, based on a current position, a traveling track sequentially from a first point to a second point; storing the generated traveling track in travelling track storage means; displaying, as registered spot candidates, spots which have satisfied a prescribed condition on the travelling track based on the travelling track stored in the travelling track storage means; storing a spot selected from the registered spot candidates displayed on the display means as a registered spot in a registered spot storage means; displaying an image when the current position reaches the registered spot on the display means.

Description

  The present invention relates to a display device that can be mounted on a vehicle, and relates to a display device that displays an image captured by a front camera provided in the front part of the vehicle. The present invention relates to a display device that supports safe driving by automatically displaying images captured by a front camera at a bad intersection or the like.

  2. Description of the Related Art In recent years, navigation apparatuses that support a user's safe driving by photographing the front and rear of a vehicle using a camera mounted on the vehicle and displaying the images on a display are known. This navigation device normally detects the current position of the vehicle using GPS (Global Positioning System), and displays the detected current position on a map together with the searched route. When the user operates the camera changeover switch when the vehicle exits a narrow alley or travels at a certain speed or less at an intersection with poor visibility, the information displayed on the display is displayed by the front camera mounted on the vehicle. Switch to the shot image.

  At this time, the navigation device stores information on the point where the camera is manually switched and the traveling direction (entrance angle) as a history in the storage means in the device, and displays a list of candidate points on the display from the history. By registering by the user, it is possible to automatically switch the display display to an image photographed by the front camera when the vehicle travels at that point at a certain speed or less from the next time.

 Further, for example, in the in-vehicle camera system disclosed in the following Patent Document 1 (Japanese Patent Laid-Open No. 2009-67292), a wide-angle camera is installed in a vehicle, and the wide-angle camera captures images based on road information and vehicle position information. The display range of the selected video is determined, and the video of the determined range is displayed on the display monitor.

JP 2009-67292 A

  However, in such a navigation device, it is necessary to perform an operation for registering a candidate point to be switched to the image of the front camera while the vehicle is traveling, and the vehicle driver is caused to operate the navigation device while traveling. This may be dangerous and is not preferable for traffic safety. Moreover, if it is not conscious, there exists a possibility of forgetting to register a desired point (point which requires registration).

  For this reason, as a registration method other than the above, registration is possible by selecting an intersection etc. from the map and then setting the approach angle of the vehicle. However, there is a problem that it is often difficult to understand only by the map.

  In addition, the in-vehicle camera system disclosed in Patent Document 1 only displays a cut-out camera image when the vehicle approaches an intersection or the like, and a point for switching only a point desired by the user to a camera image is not necessarily displayed in advance. However, there is a problem that a function for preventing a traffic accident at the time of registration is not considered.

  An object of the present invention is to solve the above-described problems, and to provide a display device that can pick up a point that needs to be registered as a front camera activation point and present it to a user. To do.

In order to solve the above problems, the invention according to claim 1 of the present application is mounted on a vehicle based on control means for controlling the operation of each part, current position detection means for detecting a current position, and control of the control means. In a vehicle-mounted display device comprising display means for displaying an image photographed by the photographing means, and travel locus storage means,
The control means sequentially generates a travel locus from the first point to the second point based on the current position, stores the generated travel locus in the travel locus storage means,
Based on the travel trajectory stored in the travel trajectory storage means, a point that satisfies a predetermined condition on the travel trajectory is displayed on the display means as a registered spot candidate,
A point selected from the registration point candidates displayed on the display unit is stored in the registration point storage unit as a registration point,
The video is displayed on the display means when the current position reaches the registration point.

  The invention according to claim 2 of the present application is characterized in that, in the invention according to claim 1, the point satisfying the predetermined condition is a point where the vehicle suddenly accelerates or decelerates rapidly.

  In the invention according to claim 3 of the present application, in the invention according to claim 1, the point satisfying the predetermined condition is a point where the vehicle has passed within a predetermined range from the home at a predetermined speed or less. It is characterized by that.

  The invention according to claim 4 of the present application is characterized in that, in the invention according to claim 1, the point satisfying the predetermined condition is a traffic accident frequent occurrence point.

  In the invention according to claim 1, the control means sequentially generates a travel locus from the first point to the second point based on the current position, and stores the generated travel locus in the travel locus storage means. Based on the travel trajectory stored in the travel trajectory storage means, a point that satisfies a predetermined condition on the travel trajectory is displayed as a registered spot candidate on the display means, and the registered spot candidate displayed on the display means A point selected from among the points is stored in the registration point storage unit as a registration point, and the video is displayed on the display unit when the current position reaches the registration point.

  According to such a configuration, after the user travels, for example, at the arrival point of the destination, based on the travel locus stored in the travel locus storage means, a point that satisfies a predetermined condition on the travel locus (for example, (Intersections) are displayed as a list of registration point candidates, so that the user can smoothly perform a registration operation by selecting a location to be set as a camera switching point for displaying video shot by the shooting unit on the display unit. become able to. Here, information on the approach angle is also generally added to the travel locus, and since registration is performed from the route actually traveled, registration becomes more practical. Furthermore, since the registration is performed in a stopped state, consideration is also given to safety.

  In the invention according to claim 2, the point satisfying the predetermined condition is a point where the vehicle is suddenly accelerated or decelerated suddenly. As a result, since the points where the vehicle has suddenly decelerated before are displayed as a list of registered point candidates, the user can select a place to be set as a camera switching point for displaying images taken by the photographing unit on the display unit. The registration operation can be performed for a point passing through a wide road from a narrow road, or a point passing through a narrow street from a narrow street.

  In the invention according to claim 3, the point that satisfies the predetermined condition is a point where the vehicle passes at a constant speed or less within a predetermined range from the home. As a result, since a list of points within a predetermined range from home is displayed as registration point candidates, the user wants to set a camera switching point for displaying video shot by the shooting unit on the display unit By selecting, the registration point desired by the user can be stored while suppressing the memory capacity of the registration point storage means.

  In the invention concerning Claim 4, the point which satisfy | filled the said predetermined condition is a traffic accident frequent occurrence point. As a result, the vicinity of traffic accident frequent occurrence points are displayed as a list of registration point candidates, so that the user can select a place to be set as a camera switching point for displaying images taken by the photographing means on the display means. Registration operations can be performed for intersections and the like where a frequent occurrence point is located.

It is a block diagram which shows the principal part structure of the navigation apparatus concerning the Example of this invention. It is a flowchart which shows the processing operation of the navigation apparatus concerning the Example of this invention.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment described below exemplifies a navigation device for embodying the technical idea of the present invention, and is not intended to identify the present invention as this navigation device, but claims The present invention is equally applicable to display devices of other embodiments included in the scope of the above.

  FIG. 1 is a block diagram showing a main configuration of a navigation device 10 according to an embodiment of the present invention. The navigation device 10 is mounted on a vehicle, displays the current position of the vehicle together with a map image on the display, searches for the current position or a route from a desired departure point to a destination, and displays the route on the display. It provides assistance for traveling to the destination.

  The navigation device 10 includes a control unit 11, a current position detection unit 15, a route search unit 16, a map storage unit 17, a travel locus storage unit 18, a display unit 19, an operation unit 20, and a registration point storage unit 21. The

  The control unit 11 includes a CPU 12, a ROM 13, and a RAM 14, and controls and controls the operations of the units described below when the CPU 12 executes a control program stored in the ROM 13 and / or the RAM 14.

  The control means 11 displays a list of intersection names read out as registration candidate points on the display unit 19 among points stored in the travel locus storage unit 18 to be described later, and a registration point in which the current position of the vehicle is described later. It functions as a display control means for displaying on the display unit 19 an image of the front of the vehicle taken by a front camera installed in front of the vehicle when the registration point stored in the storage unit 21 is reached.

  The current position detector 15 receives radio waves from a plurality of GPS satellites orbiting over the earth at predetermined time intervals, and based on the time information and satellite position information included in this signal, the current position of the vehicle Is detected. Note that the current position detection unit 15 may detect the current position of the vehicle using the output of autonomous navigation means including a gyro sensor, an acceleration sensor, a distance sensor, a direction sensor, and the like. In this case, the travel distance and travel direction of the vehicle are detected, and the current position is obtained by adding these values to the reference position. In addition, the method for obtaining the current position using autonomous navigation means is combined with the method for obtaining the current position by receiving radio waves from GPS satellites, and in tunnels where radio waves from GPS satellites cannot be received or high-level errors are likely to occur. Effective in a building district.

  The route search unit 16 refers to the map information stored in the map storage unit 17 when the route search conditions such as the departure point, the destination, and the waypoint are specified by the user via the operation unit 20, It searches for the optimum route from the ground to the destination and creates guide route data. The search for the optimum route is performed from the node of the road corresponding to the starting point or the current position specified by the user via a desired waypoint (if no waypoint is designated, no waypoint is included) The nodes and links between the nodes corresponding to the destination specified by the user are searched by a method such as Dijkstra method, the link length (link cost) and the required time are accumulated, and the total link length (travel distance) or total A route having the shortest required time is searched as a guide route, and nodes and links belonging to the route are provided as guide route data.

  The map storage unit 17 stores road data including road node data whose nodes are nodes such as intersections and branch points of roads, and road link data whose routes are links between the nodes. It is a storage medium (HDD, DVD, etc.). The road node data includes road node numbers, position coordinates, number of connection links, branch point names, etc., and route guidance that provides route guidance such as turning left and right and straight ahead at a guide point that is a predetermined distance away from the branch point. Includes data and location coordinates of guide points.

  The road link data includes a road node number as a starting point and an end point, a road type, a link length (link cost) as distance information between nodes, a required time, the number of lanes, a road width, and the like. The road link data further includes data such as bridges, tunnels, railroad crossings, toll booths, speed limit, and the like as link attributes. The road type is information including a highway and a toll road, and a national road and a prefectural road.

  The map storage unit 17 further includes the position, shape, name, and type of facilities including water system data such as coastline, lakes and rivers, administrative boundary data, gas stations, parking lots, shopping centers, museums, and other landmarks. In addition to background data composed of facility data, map image data stored in a vector format may be included to display the map image in an easily viewable manner.

  In addition, the map storage unit 17 stores point information such as intersection names, road names, and facility names in advance as names corresponding to nodes and links added to travel locus data described later.

  When the navigation device 10 is used, the road data, the background data, and the map image data are read from a map of a predetermined range including the current position of the navigation device 10 from the map storage unit 17, and the current position indicating the current position. Marks and guide route images are superimposed and displayed on the display unit 19. The map image is scrolled as the vehicle travels, and is displayed so that the current position detected by the current position detector 15 is always at the center of the display screen. At this time, since the current position detected by the current position detection unit 15 includes an error, if the current position deviates from the road, the map matching process is performed by the control unit 11 and displayed on the display unit 19. The current position is corrected on the road or route.

  Hereinafter, various data stored in the map storage unit 17 are collectively referred to as map data.

  The travel locus storage unit 18 stores travel locus data of a route actually traveled while receiving route guidance based on the guidance route searched by the route search unit 16 based on the departure place and destination designated by the user. A storage medium including a RAM or the like.

  The travel locus data is generated by the control means 11 as data in which the node number of the passing node and the link number of the passing link obtained by map matching the current position detected by the current position detecting unit 15 are continuous. When intersection names and road names corresponding to passing nodes and links included in the travel locus data are stored in the map storage unit 17, the control unit 11 refers to the point information stored in the map storage unit 17. Thus, names corresponding to the nodes and links are added and stored in the travel locus storage unit 18. At this time, the structure which a user inputs the character string used as an intersection name or a road name using the operation part 20 may be sufficient.

  The display unit 19 displays an image in front of the vehicle taken by the front camera 30 installed in front of the vehicle, a current position mark indicating the current position of the vehicle detected by the current position detection unit 15, and a map storage unit The map data read from 17, the guidance route data searched by the route search unit 16, and the like are displayed, and a display panel such as a liquid crystal display is used. Further, when registering a place to be set as a front camera switching point in order to display an image photographed by the front camera 30, a registration candidate point is calculated from the travel locus data stored in the travel locus storage unit 18 by the control means 11. A list of intersection names extracted as is displayed.

  The operation unit 20 is configured by a touch panel or the like that is operated by pressing an operation key provided on the main body of the navigation device 10 or an operation icon displayed on the display unit 19, and is a starting point and a destination for performing a route search. It is used for inputting route search conditions such as waypoints and selecting a place to be set as a front camera switching point.

  The registration point storage unit 21 is a storage medium that stores information on intersections that are candidates for front camera switching points. The intersection information is composed of the position information of the intersection extracted from the traveling locus data stored in the traveling locus storage unit 21 and the traveling direction (entrance angle) of the vehicle at the intersection.

  Next, the point registration process using the navigation device 10 configured as described above will be described with reference to the flowchart of FIG.

  First, prior to traveling, when a route search condition such as a departure point, a destination, or a transit point of a desired facility is input by the user via the operation unit 20, the route search unit 16 performs a normal route search. Similarly, the map data memorize | stored in the map memory | storage part 17 is read, and the optimal route | route from a departure place to the destination is searched.

  And the control means 11 determines whether it started driving | running | working from the departure point to the destination along the optimal route (step S11). For example, when the vehicle speed signal from the vehicle speed sensor is detected by providing the navigation device 10 with a receiving unit that receives a vehicle speed signal from a vehicle speed sensor provided in the vehicle. It can be determined that traveling has started. In addition, as another method for determining the start of traveling, the navigation device 10 may be provided with an acceleration sensor, and it may be determined whether traveling is started based on an output from the acceleration sensor.

  When it is determined that the vehicle has started traveling along the optimum route (step S11, YES), the control unit 11 displays a node and a link corresponding to the current position detected by the current position detection unit 15 at every moment on the map storage unit. The map data stored in the map 17 is identified, and the identified nodes and links are sequentially temporarily stored in the RAM 14 as travel route data (step S12).

  In addition, when temporarily storing the data of the travel route, as the attribute information of the passing link, information on the traveling direction predetermined for the link is added to the data of the link as the current traveling direction (entrance angle) of the vehicle. Remember.

  Next, the control means 11 determines whether or not the vehicle has arrived at the destination based on the current position of the vehicle detected by the current position detection unit 15 and the position information corresponding to the destination read from the map storage unit 17. Is determined (step S13). If it is determined that the vehicle has arrived at the destination (YES in step S13), a series of travel route data from the departure place to the destination stored in the RAM 14 is stored in the travel locus storage unit 18 as travel locus data. (Step S14).

  And the control means 11 reads the name of the intersection contained in driving locus data as a registration candidate point from the driving locus memory | storage part 18, and displays it as a list on the display part 19 (step S15).

  The timing for displaying the list is, for example, displayed when the vehicle arrives at the destination and stops (however, the engine remains on) or when the engine is turned on next time. In the case of displaying when the engine is turned on next time, the process proceeds to a determination process of whether or not the engine is turned off after the process of S14 in the flowchart of FIG. 2, and when the engine is turned on next time, S11 in FIG. Prior to this process, the processes from S15 to S17 are executed.

  As to whether or not the vehicle has arrived at the destination, the destination (the destination designated by the user during the route search) and the current position detected by the current position detection unit 15 are within a predetermined range. When the vehicle speed cannot be detected, it can be determined that the vehicle has arrived at the destination.

  Then, when the user selects an intersection that the user wants to set as the front camera switching point from the list of intersection names displayed through the operation unit 20 (step S16), the control unit 11 selects the intersection selected as the front camera switching point. Is stored (registered) in the registration point storage unit 32 (step S17).

  In the above embodiment, the case where the control unit 11 extracts all intersections included in the trajectory data from the travel trajectory data stored in the travel trajectory storage unit 26 as registration candidate points has been described as an example. However, instead of simply extracting the intersections included in the trajectory data, the points to be extracted are points that satisfy a predetermined condition (for example, points at which the vehicle is determined to suddenly accelerate or decelerate suddenly, traffic accidents frequently occur) Or a point where the vehicle passes at a predetermined speed or less within a predetermined range from the home) may be extracted as a registration candidate point.

  As a method for determining whether or not the vehicle has suddenly accelerated or decelerated, the navigation device 10 is provided with an acceleration sensor, and based on the output from the acceleration sensor, it can be determined whether the vehicle is rapidly accelerating or decelerating. In this case, the control unit 11 determines a node or link corresponding to the current position detected by the current position detection unit 15 at the time when it is determined that sudden acceleration or sudden deceleration has occurred based on the output of the acceleration sensor. When the specified node or link is stored in the RAM 14 as the travel route data, it is identified as a point where sudden acceleration or sudden deceleration has occurred as additional information of the node or link. The information shown is added and stored.

  For sudden acceleration or deceleration, based on the output from the acceleration sensor, if the degree of change in the vehicle speed is greater than or equal to a predetermined threshold during a predetermined time, it can be determined that the vehicle is suddenly accelerated, and if it is less than or equal to the predetermined threshold. It can be determined as a sudden deceleration.

  As for the information on the location where the accident frequently occurs, a method of adding information indicating the location where the accident frequently occurs to the location corresponding to the location where the accident frequently occurs among the map data stored in the map storage unit 17 in advance, By providing a communication unit communicable with the information server, the latest accident frequent occurrence point data is received from the external information server via the communication unit, and the accident frequent occurrence point among the map data stored in the map storage unit 17 is received. It is also possible to add or update information that is an accident-prone point as additional information of the point corresponding to.

  In addition, as a process in which a point where a vehicle passes at a certain speed or less within a predetermined range from the home is set as a registration candidate point, the position of the home is set as registration point information by the user in advance. Then, based on the current position of the vehicle detected by the current position detection unit 15, the map data stored in the map storage unit 17, and the home position information set in advance, the vehicle is within a predetermined range from the home. Carefully travel on a narrow road near your home, for example, where you are located and determine that the current vehicle traveling speed is below a predetermined speed (for example, 20 km / h or less) based on the output of a vehicle speed sensor or the like. In such a point, it is considered necessary to display the image of the front camera on the display unit 19 at such a point. For this reason, the current position of the vehicle at the time when the above conditions are met (when it is determined that the vehicle speed is equal to or lower than the predetermined speed within a predetermined range from home), the node corresponding to the specified position or When the link is stored in the RAM 14 as travel route data, additional information that is a point where the vehicle has traveled at a predetermined speed or less within a predetermined range from the home is added and stored.

  In this way, among the travel locus data stored in the travel locus storage unit 26, the point candidates to be displayed as a list of registration candidate points on the display unit 19 are points with additional information as described above (rapid acceleration or List of locations where sudden deceleration has occurred, locations where accidents frequently occur, and locations where the vehicle speed is within the specified range from home, and only where there is a high need to display the video from the front camera. Can be registered as a front camera switching point.

  In the above description, the control means 11 extracts the registration candidate point candidates from the trajectory data stored in the travel trajectory storage unit 26 and displays them on the display unit 19, and the user selects a desired point as the front camera switching point. However, the present invention is not limited to this, and the control unit 11 automatically determines a point determined to be registered as a front camera switching point from the traveling locus data stored in the traveling locus storage unit 26. It may be configured to be registered.

  In this case, the control means 11 is a point where predetermined conditions are met (a point where the vehicle suddenly accelerates or decelerates rapidly, a point where traffic accidents occur frequently, or a point where the vehicle passes within a predetermined range from home). The node or link corresponding to the specified position can be stored in the registration point storage unit 21 as a front camera switching point without being temporarily stored in the RAM 14 as described above.

DESCRIPTION OF SYMBOLS 10 ... Navigation apparatus 11 ... Control means 12 ... CPU
13 ... ROM
14 ... RAM
DESCRIPTION OF SYMBOLS 15 ... Current position detection part 16 ... Route search part 17 ... Map memory | storage part 18 ... Traveling track memory | storage part 19 ... Display part 20 ... Operation part 21 ... Registration point memory | storage part

Claims (4)

Control means for controlling the operation of each part; current position detection means for detecting the current position; display means for displaying images taken by photographing means mounted on the vehicle based on the control of the control means; A vehicle-mounted display device comprising:
The control means sequentially generates a travel locus from the first point to the second point based on the current position, stores the generated travel locus in the travel locus storage means,
Based on the travel trajectory stored in the travel trajectory storage means, a point that satisfies a predetermined condition on the travel trajectory is displayed on the display means as a registered spot candidate,
A point selected from the registration point candidates displayed on the display unit is stored in the registration point storage unit as a registration point,
An in-vehicle display device that displays the video on the display means when the current position reaches the registration point.   The in-vehicle display device according to claim 1, wherein the point satisfying the predetermined condition is a point where the vehicle suddenly accelerates or decelerates rapidly.   The in-vehicle display device according to claim 1, wherein the point satisfying the predetermined condition is a point where the vehicle passes at a predetermined speed or less within a predetermined range from home.   The in-vehicle display device according to claim 1, wherein the point satisfying the predetermined condition is a traffic accident frequent occurrence point.

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