JP2012220342A - Navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device which enables a user to easily grasp positional relation between a position of its own vehicle and a position distant from the vehicle when displaying a map image of the distant position.SOLUTION: A navigation device comprises: a vehicle position detection unit 5 for detecting a position of its own vehicle; map drawing unit 14 for drawing a map image of circumference of the vehicle position on a display device 6; a display processing unit 16; a display terminal device 7 which can be moved to an optional position within a predetermined range around the display device 6 by a user; and a terminal relative position detection unit 42 for detecting a relative position of the display terminal device 7 against the display device 6. Based on the vehicle position and the relative position detected by the terminal relative position detection unit 42, the navigation device determines a position of a map image to be displayed on a screen of the display terminal device 7, and the navigation device displays a map image of circumference of the determined position on the display terminal device 7.

Description

  The present invention relates to a navigation device that displays a map image around a vehicle position.

  2. Description of the Related Art Conventionally, there is known a map display device that displays a map image around a vehicle position and scrolls the display position in an arbitrary direction (see, for example, Patent Document 1). This map display device is equipped with a joystick that can perform three operations: tilting in a plurality of directions, rotation around an axis, and pressing in the axis, in advance. It can be done using a joystick.

Japanese Patent Laying-Open No. 2005-2928446 (page 4-10, FIG. 1-9)

  By the way, in the map display device disclosed in Patent Document 1 described above, a map image at an arbitrary position can be displayed by scrolling the map image, but the position of the displayed map image is separated from the position of the vehicle. There is a problem that it is difficult to grasp the positional relationship with the vehicle position as the distance increases. In addition, although the scroll instruction is performed using a joystick, fine adjustment of the display position is difficult when the scroll speed is fast, and fine adjustment of the display position is facilitated when the scroll speed is slow. There was a problem that it took time and the operability was poor.

  The present invention was created in view of the above points, and its purpose is to easily grasp the positional relationship with the vehicle position when a map image at a position away from the vehicle position is displayed. Another object of the present invention is to provide a navigation device capable of improving the operability when displaying a map screen at an arbitrary position.

  In order to solve the above-described problem, a navigation device according to the present invention is a first vehicle position detection unit that detects a vehicle position, and a map image around the vehicle position detected by the vehicle position detection unit. The map image drawing means, the first display processing means for displaying the map image drawn by the first map drawing means on the screen of the first display device, and a predetermined area around the first display device by the user Detected by a second display device capable of moving to an arbitrary position within the range, a relative position detection means for detecting the relative position of the second display device with respect to the first display device, and a vehicle position detection means The position of the map image to be displayed on the screen of the second display device is determined based on the determined own vehicle position and the relative position detected by the relative position detecting means, and a map image around the determined position is drawn. Second map image It includes a picture unit, and a second display processing means for displaying a map image drawn by the second map drawing means on the screen of the second display device.

  Thereby, since the map image according to the position can be displayed by moving the position of the second display device while displaying the map image around the own vehicle position, the map image at a position away from the own vehicle position. It becomes easy to grasp the positional relationship with the own vehicle position when is displayed. Further, since the map screen at an arbitrary position can be displayed simply by changing the position of the second display device, fine adjustment of the display position is easy and it takes time to display the map screen at the arbitrary position. The operability can be improved without any problems.

  Further, the second map image drawing means described above obtains a position after scrolling the position of the map image being displayed on the screen of the first display device by a distance corresponding to the relative position with the vehicle position as the center. It is desirable to determine the position of the map image to be displayed on the screen of the second display device. Thereby, it is possible to arbitrarily change the position of the displayed map image simply by changing the position of the second display device.

  Each of the first and second map drawing means described above is a map to be drawn according to the changed vehicle position when the own vehicle position detected by the own vehicle position detecting means is changed. It is desirable to change the position of the image. Thereby, the position of both map images displayed on the first and second display devices can be automatically moved along with the movement of the vehicle position.

  Further, when the position of the second display device is moved in parallel with the direction perpendicular to the screen of the first display device described above, and the change of the relative position accompanying this movement is detected by the relative position detection means, The second map image drawing means desirably changes the display scale of the map image displayed on the screen of the second display device. In particular, when the position of the second display device described above is moved away from the first display device, the display scale is preferably changed to a large value. Thereby, the display scale of the map image displayed on the second display device can be changed without performing a special operation, and the operation can be simplified.

  Further, the relative position detecting means described above is relative to the position of the screen of the first display device included in the image taken by the camera attached to the housing accommodating the second display device, or relative to this screen. It is desirable to detect the relative position of the second display device based on the position of the index whose position is fixed. Alternatively, it is desirable that the relative position detection unit described above detects the relative position of the second display device based on the output of the acceleration sensor attached to the housing that houses the second display device. Thereby, the relative position of the second display device can be detected easily and reliably.

It is a figure which shows the structure of the navigation apparatus of one Embodiment. It is a figure which shows the detailed structure of a display terminal device. It is a figure which shows the outline | summary of the map image display in this embodiment. It is a figure which shows the relative positional relationship of a display apparatus and a display terminal device. It is a figure which shows the specific example of the relative position detection of a display terminal device. It is a figure which shows the structure of the navigation apparatus of a modification. It is a figure which shows the structure of the display terminal device of a modification.

  Hereinafter, a navigation device according to an embodiment to which the present invention is applied will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a navigation device according to an embodiment. The navigation device shown in FIG. 1 includes a navigation controller 1, a map data storage device 3, an operation unit 4, a vehicle position detection unit 5, a display device 6, and a display terminal device 7.

  The navigation controller 1 implements a navigation function by executing a predetermined operation program using a CPU, ROM, RAM, or the like. The detailed configuration of the navigation controller 1 will be described later.

  The map data storage device 3 is a storage medium that stores map data necessary for map display, facility search, route search, and the like and a reading device thereof. The map data storage device 3 stores map data in units of rectangular figure leaves divided into appropriate sizes by longitude and latitude. The map data of each leaf can be specified and read by designating the leaf number. The map data storage device 3 is realized by a hard disk device or a semiconductor memory, or by a DVD and its reading device. Further, the map data storage device 3 may be replaced with a communication device to acquire map data from an external map distribution server (not shown).

  The operation unit 4 is for accepting user operations, and includes various operation buttons and operation knobs. In addition, the operation unit 4 includes a touch panel attached to the screen of the display device 6, and the user can directly perform an operation instruction by pointing a part on the screen with a finger or the like. Yes. The vehicle position detection unit 5 includes, for example, a GPS receiver, an orientation sensor, a distance sensor, and the like, detects the vehicle position (longitude, latitude) at a predetermined timing, and outputs a detection result.

  The display device 6 is configured by, for example, an LCD (liquid crystal display device), and displays a map image and intersection guidance image around the vehicle position based on the video signal output from the navigation controller 1. The display terminal device 7 performs wireless connection (for example, Bluetooth connection) with the navigation controller 1, and the relative position of the display terminal device 7 with respect to the display device 6 is based on the video signal output from the navigation controller 1. Display the corresponding map image. The display terminal device 7 may use a dedicated device having the functions of the present embodiment, but a portable terminal device called a smartphone may have the functions. Details of the map image display using the display terminal device 7 will be described later.

  Next, a detailed configuration of the navigation controller 1 will be described. The navigation controller 1 shown in FIG. 1 includes map buffers 10 and 20, map readout control units 12 and 22, map drawing units 14 and 24, display processing unit 16, map image transmission unit 26, communication unit 30, and vehicle position calculation unit 32. , An input processing unit 34, a captured image receiving unit 40, a terminal relative position detecting unit 42, and a terminal display scale setting unit 44.

  In the present embodiment, a map buffer 10, a map readout control unit 12, a map drawing unit 14, and a display processing unit 16 are provided to display a map image or the like on the display device 6. The map buffer 10 temporarily stores map data read from the map data storage device 3. The map reading control unit 12 outputs a predetermined range of map data reading request to the map data storage device 3 in accordance with the vehicle position calculated by the vehicle position calculating unit 32. Based on the map data stored in the map buffer 10, the map drawing unit 14 performs drawing processing necessary for displaying a map image on the display device 6 to create map image drawing data. The display processing unit 16 receives the map image drawing data created by the map drawing unit 14 and displays a predetermined range of map images on the screen of the display device 6 based on the drawing data.

  In the present embodiment, a map buffer 20, a map readout control unit 22, a map drawing unit 24, and a map image transmission unit 26 are provided to display a map image or the like on the display terminal device 7. The map buffer 20 temporarily stores the map data read from the map data storage device 3. The map readout control unit 22 issues a request to read out map data in a predetermined range according to the vehicle position calculated by the vehicle position calculation unit 32 and the outputs of the terminal relative position detection unit 42 and the terminal display scale setting unit 44. Output to the map data storage device 3. Based on the map data stored in the map buffer 20, the map drawing unit 24 performs a drawing process necessary for displaying a map image on the display terminal device 7 to create map image drawing data. The map image transmission unit 26 transmits the map image drawing data created by the map drawing unit 24 to the display terminal device 7 via the communication unit 30.

  The communication unit 30 is a Bluetooth device, and transmits and receives various data to and from the display terminal device 7 by Bluetooth. The vehicle position calculation unit 32 calculates the vehicle position based on the detection data output from the vehicle position detection unit 5, and if the calculated vehicle position is not on the road of the map data, the vehicle position calculation unit 32 calculates the vehicle position. Perform map matching processing to correct. The input processing unit 50 outputs commands for performing operations corresponding to various operation instructions input from the operation unit 4 to each unit in the navigation controller 1.

  The captured image receiving unit 40 receives the captured image sent from the display terminal device 7. The terminal relative position detection unit 42 detects the relative position of the display terminal device 7 with respect to the display device 6 based on the captured image received by the captured image reception unit 40. The terminal display scale setting unit 44 sets a display scale for performing map display on the display terminal device 7 based on the captured image received by the captured image receiving unit 40. Specific operations of the terminal relative position detection unit 42 and the terminal display scale setting unit 44 will be described later.

  The display terminal device 7 receives the map image drawing data sent from the communication unit 30 in the navigation controller 1 and displays the map, and also displays data necessary for the relative position detection by the terminal relative position detection unit 42, Data necessary for display scale setting by the display scale setting unit 44 is transmitted to the navigation controller 1.

  FIG. 2 is a diagram illustrating a detailed configuration of the display terminal device 7. As shown in FIG. 2, the display terminal device 7 includes a communication unit 50, a map image reception unit 52, a display processing unit 54, a display device 56, a camera 60, and a captured image transmission unit 62.

  The communication unit 50 is a Bluetooth device, and transmits and receives various data to and from the navigation controller 1 by Bluetooth. The map image receiving unit 52 receives the map image drawing data sent from the map image transmitting unit 26 via the communication unit 50. The display processing unit 54 receives the map image drawing data received by the map image receiving unit 52, and displays a predetermined range of map images on the screen of the display device 56 based on the drawing data. The display device 56 is configured by an LCD, for example, and displays a map image.

  The camera 60 is a housing of the display terminal device 7 on which the display device 56 is mounted, and images the opposite side of the screen of the display device 56. Shooting by the camera 60 is performed so that the screen of the display device 6 is included in this shooting range. The captured image transmission unit 62 transmits the captured image data output from the camera 60 to the navigation controller 1 via the communication unit 50.

  The vehicle position detecting unit 5 described above is the own vehicle position detecting unit, the map data storage device 3, the map buffer 10, the map reading control unit 12, and the map drawing unit 14 are the first map image drawing unit, and the display processing unit 16 is the display unit 16. As the first display processing means, the display device 6 is the first display device, the display terminal device 7 is the second display device, the map data storage device 3, the map buffer 20, the map readout control unit 22, and the map drawing unit. Reference numeral 24 corresponds to a second map image drawing unit, the display processing unit 54 corresponds to a second display processing unit, and the terminal relative position detection unit 40 corresponds to a relative position detection unit.

  The navigation device according to the present embodiment has such a configuration. Next, the display of the map image by the display device 6 and the display of the map image by the display device 56 provided in the display terminal device 7 are performed in parallel. The operation to be performed will be described.

  FIG. 3 is a diagram showing an outline of the map image display in the present embodiment. In FIG. 3, A is a map image around the vehicle position G, and shows a range drawn by the map drawing unit 14 and displayed on the display device 6 by the display processing unit 16, and P <b> 1 is the center thereof. Show. In general, map image drawing data that is wider than the range A drawn by the map drawing unit 14 and corresponding to a part of the drawing range is read and display corresponding to the range A is performed.

  B indicates a range drawn by the map drawing unit 24 and displayed on the display device 56 by the display processing unit 54 in the display terminal device 7, and Q1 indicates the center thereof. C shows a surrounding map including the vehicle position G. Note that the map indicated by the range C is not a map image actually drawn, but for explaining the positional relationship between the ranges A and B. In the present embodiment, the position (X1, Y1) of the map image displayed on the display device 56 of the mobile terminal device 7 indicated by the range B is set based on the relative position of the display terminal device 7 with respect to the display device 6.

  FIG. 4 is a diagram illustrating a relative positional relationship between the display device 6 and the display terminal device 7. It is assumed that a navigation device casing is installed in the center of the dashboard of the vehicle, and this casing is provided with a display device 6. P <b> 2 indicates the center of the display device 6. The display terminal device 7 can be moved to an arbitrary position within a predetermined range around the display device 6, and Q <b> 2 indicates the center of the display terminal device 7 (or the display device 56). In the example illustrated in FIG. 4, it is assumed that the relative position of the display terminal device 7 is shifted from the display device 6 by X2 in the horizontal direction and Y2 in the vertical direction.

  In the present embodiment, the terminal relative position detector 42 detects the relative position (X2, Y2) shown in FIG. Further, the map read control unit 22 reads the map data read center position (FIG. 3) based on the current vehicle position acquired from the vehicle position calculation unit 32 and the relative positions X2 and Y2 of the display terminal device 7. Q1) is set. Specifically, if the display scale is determined, the distance between the vehicle position G shown in FIG. 3 and the center P1 of the range A can be calculated, and the horizontal distance from the center P1 to the center Q1 of the range B X1 and the vertical distance Y1 can be calculated using the relative positions X2 and Y2 of the display terminal device 7. The position of the center Q1 of the range B calculated in this way is obtained by scrolling the position of the center P1 of the range A by the distances X1 and Y1 corresponding to the relative positions X2 and Y2 around the vehicle position. Corresponds to the position of.

  Further, when the vehicle travels and the own vehicle position moves, the map data reading center position (Q1 in FIG. 3) set by the map reading control unit 22 is also changed along with this movement. That is, with the movement of the vehicle position, the map images displayed on the display device 6 and the display device 56 of the display terminal device 7 move in the same direction.

  FIG. 5 is a diagram illustrating a specific example of the relative position detection of the display terminal device 7. D shown in FIG. 5 indicates a shooting range of the camera 60 provided in the display terminal device 7. Photographing is performed such that the display device 6 is included in the photographing range D, and the photographed image receiving unit 40 receives a photographed image obtained by the photographing. The terminal relative position detector 42 calculates the distance (X3, Y3) from the center S to the center T of the display device 6 based on the captured image, and detects the relative position (X2, Y2) based on these distances. To do. Note that the conversion from the distance (X3, Y3) to the relative position (X2, Y2) is performed by simple proportional calculation if the distance to the camera 60 along the direction perpendicular to the screen of the display device 6 is known. Can do. Further, when the screen size of the display device 6 is known, the relative position (X2, Y2) may be calculated based on the size of the screen included in the captured image.

  By the way, in the present embodiment, the map image displayed on the display device 56 of the display terminal device 7 can be enlarged / reduced by moving the display terminal device 7 in parallel with the direction perpendicular to the screen of the display device 6. It can be done. For example, the size of the display device 6 included in the shooting range D shown in FIG. 5 increases or decreases with this movement when the display terminal device 7 is moved back and forth. The terminal display scale setting unit 44 determines the moving distance before and after the display terminal device 7 based on the captured image received by the captured image receiving unit 40, and changes the display scale according to the moving distance. Specifically, when the display terminal device 7 is moved away from the display device 6, the display scale is changed to a large value according to the amount of movement, and the display scale is decreased to a small value when the display terminal device 7 is moved in the opposite direction. Be changed. As a result, the map image can be displayed so that the map is enlarged / reduced by looking at the map with a loupe.

  The actual map data is prepared in advance according to a plurality of display scales, and does not correspond to arbitrary enlargement / reduction according to the movement amount of the display terminal device 7. Therefore, in the present embodiment, for a map image having an arbitrary display scale that does not correspond to a preset fixed display scale, the map drawing unit 24 uses a map image corresponding to the closest fixed display scale. By performing the interpolation process, a map image at an arbitrary magnification is generated.

  Thus, in the navigation device of the present embodiment, the position of the display terminal device 7 is moved while displaying the map image around the vehicle position on the display device 6, and the map image corresponding to the position is displayed on the display terminal device 7. Since it can be displayed on the display device 56, when a map image at a position away from the vehicle position is displayed, it is easy to grasp the positional relationship with the vehicle position. Further, since the map screen at an arbitrary position can be displayed simply by changing the position of the display terminal device 7, fine adjustment of the display position is easy and it takes time to display the map screen at an arbitrary position. The operability can be improved. Moreover, the position of both map images displayed on the two display devices 6 and 56 can be automatically moved along with the movement of the vehicle position. Moreover, the display scale of the map image displayed on the display terminal device 7 can be changed without performing a special operation only by moving the front and back positions of the display terminal device 7, and the operation can be simplified. Become.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the embodiment described above, the display device 56 of the display terminal device 7 is included in the shooting range of the camera 60 as shown in FIG. Any index with a fixed position (for example, an infrared light emitting unit) may be photographed.

  In the above-described embodiment, the position of the display terminal device 7 is detected based on the image captured by the camera 60. However, the display terminal device 7 is provided with a three-dimensional position detection unit. The relative position may be directly detected.

  FIG. 6 is a diagram illustrating a configuration of a navigation device according to a modification. FIG. 7 is a diagram illustrating a configuration of a display terminal device 7A according to a modification. The modification shown in these drawings is obtained by replacing the navigation controller 1 with the navigation controller 1A and the display terminal device 7 with the display terminal device 7A with respect to the configuration shown in FIGS. In the navigation controller 1A, the captured image receiving unit 40, the terminal relative position detecting unit 42, and the terminal display scale setting unit 44 included in the navigation controller 1 are a three-dimensional position receiving unit 40A, a terminal relative position detecting unit 42A, and a terminal display scale. It is replaced with a setting unit 44A. In the display terminal device 7A, the camera 60 and the captured image transmission unit 62 included in the display terminal device 7 are replaced with a three-dimensional position detection unit 60A and a three-dimensional position transmission unit 62A.

  The three-dimensional position detection unit 60A is configured to include a three-axis acceleration sensor attached to the housing of the display terminal device 7A, and calculates a three-dimensional position based on the output of the three-axis acceleration sensor. In this embodiment, since it is necessary to know the relative position of the display terminal device 7 with respect to the display device 6, for example, at a position overlapping the display device 6 prior to display (or a location where the relative position with the display device 6 is known). The display terminal device 7 is arranged, and the relative three-dimensional position of the display terminal device 7 is acquired with the position as an initial state. The three-dimensional position transmission unit 62A transmits the three-dimensional position acquired by the three-dimensional position detection unit 60A to the navigation controller 1A via the communication unit 50. Note that a three-dimensional position including the inclination of the display terminal device 7A may be obtained using both the three-axis acceleration sensor and the three-axis gyro sensor. In this case, when the display terminal device 7A is tilted, it is possible to display the map image by tilting the range B shown in FIG.

  The three-dimensional position receiving unit 40A receives the three-dimensional position sent from the display terminal device 7. The terminal relative position detection unit 42A detects the relative position of the display terminal device 7 with respect to the display device 6 based on the three-dimensional position received by the three-dimensional position reception unit 40A. In addition, when the calculation of the relative position is completed by the three-dimensional position detection unit 60A in the display terminal device 7A, the terminal relative position detection unit 42A may be omitted. Further, the processing may be shared by the three-dimensional position detection unit 60A and the terminal relative position detection unit 42A in the display terminal device 7A. The terminal display scale setting unit 44A determines the amount of movement of the display terminal device 7A in the front-rear direction based on the three-dimensional position received by the three-dimensional position reception unit 40A, and displays when the display terminal device 7A performs map display. Set the scale.

  In the above-described embodiment, the navigation controller 1 is provided separately from the display terminal device 7 to cause the navigation controller 1 to perform main processing. However, the functions of each unit other than the display processing unit 16 are provided to the display terminal device 7. You may make it have. For example, when the display terminal device 7 is realized using a smartphone (mobile terminal device), the same processing can be performed by a map application and a smartphone having a GPS function.

  In the above-described embodiment, the navigation controller 1 and the display terminal device 7 are wirelessly connected. However, a wired connection may be made via a predetermined cable.

  As described above, according to the present invention, the position of the display terminal device 7 is moved while displaying the map image around the vehicle position on the display device 6, and the map image corresponding to the position is displayed on the display terminal device 7. Since it can be displayed on the device 56, when a map image at a position away from the own vehicle position is displayed, it is easy to grasp the positional relationship with the own vehicle position.

DESCRIPTION OF SYMBOLS 1 Navigation controller 3 Map data storage device 4 Operation part 5 Vehicle position detection part 6, 56 Display device 7 Display terminal device 10, 20 Map buffer 12, 22 Map read-out control part 14, 24 Map drawing part 16, 54 Display processing part 26 Map image transmission unit 30, 50 Communication unit 32 Vehicle position calculation unit 34 Input processing unit 40 Captured image reception unit 42 Terminal relative position detection unit 44 Terminal display scale setting unit 52 Map image reception unit 60 Camera 62 Captured image transmission unit

Claims (7)

Own vehicle position detecting means for detecting the own vehicle position;
First map image drawing means for drawing a map image around the vehicle position detected by the vehicle position detection means;
First display processing means for displaying the map image drawn by the first map drawing means on the screen of the first display device;
A second display device that can be moved by a user to an arbitrary position within a predetermined range around the first display device;
A relative position detecting means for detecting a relative position of the second display device with respect to the first display device;
Based on the vehicle position detected by the vehicle position detection means and the relative position detected by the relative position detection means, the position of the map image displayed on the screen of the second display device is determined, Second map image drawing means for drawing a map image around the determined position;
Second display processing means for displaying the map image drawn by the second map drawing means on the screen of the second display device;
A navigation device comprising: In claim 1,
The second map image drawing means scrolls the position of the map image being displayed on the screen of the first display device by scrolling the position corresponding to the relative position around the own vehicle position. A navigation device that determines the position of a map image to be displayed on the screen of the second display device. In claim 1 or 2,
Each of the first and second map drawing means, when the own vehicle position detected by the own vehicle position detecting means is changed, changes the map image to be drawn according to the changed own vehicle position. A navigation device characterized by changing a position. In any one of Claims 1-3,
When the position of the second display device is moved in parallel with the direction perpendicular to the screen of the first display device, and the change in the relative position accompanying this movement is detected by the relative position detection means, 2. The navigation apparatus according to claim 2, wherein the map image drawing means changes a display scale of the map image displayed on the screen of the second display device. In claim 4,
The navigation device, wherein the display scale is changed to a large value when the position of the second display device is moved away from the first display device. In any one of Claims 1-5,
The relative position detecting means is a position of a screen of the first display device included in an image taken by a camera attached to a housing accommodating the second display device or a position relative to the screen. A navigation device, wherein a relative position of the second display device is detected based on a position of an index to which is fixed. In any one of Claims 1-5,
The navigation apparatus according to claim 1, wherein the relative position detecting means detects a relative position of the second display device based on an output of an acceleration sensor attached to a housing that houses the second display device.

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