JP4847839B2 - Map display device - Google Patents

Description

  The present invention relates to a map display device that scrolls a map.

When the map displayed on the display screen is scrolled, a route guidance device is known as a prior art in which a straight line distance from the vehicle position to a position corresponding to the cursor displayed at the center of the display screen is displayed (for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-72346

  The user may want to know the required time from the vehicle position to the point where the map is scrolled and displayed. In the conventional route guidance apparatus as described in Patent Document 1, since the straight line distance from the vehicle position to the point displayed by scrolling the map is displayed, the required time can be estimated. However, there is a problem that the required time can be estimated only in a very rough time.

(1) A map display device according to a first aspect of the present invention is a detection means for detecting the current location of a vehicle , a display means for displaying a map, a map scroll means for scrolling a map displayed on the display means, and a detection means. Search means for searching for a recommended route from the current location detected by the map scroll means to a predetermined position after being scrolled by the map scroll means, calculation means for calculating a required time of the recommended route searched by the search means, A required time display means for displaying the required time without displaying the recommended route on the display means, and the search means when the map scroll means further scrolls the map after being scrolled by the map scroll means, The straight line distance between the first predetermined position included in the map after scrolling and the second predetermined position included in the map after scrolling this time is the second position. When the ratio shown with respect to the linear distance to the predetermined position is smaller than the predetermined value, the first recommended route from the current position to the first predetermined position and the first predetermined position to the second predetermined position The second recommended route is searched, and the required time display means displays the total required time of the first recommended route and the required time of the second recommended route .
(2) The invention of claim 2 is the map display device according to claim 1, wherein the required time display means further scrolls the map after being scrolled by the map scroll means within a predetermined time. Does not display the required time.

  According to the navigation device of the present invention, when the map displayed on the display screen is scrolled, a route search for a recommended route from the current location of the vehicle to a predetermined position of the scrolled map is performed. Then, the required time is calculated from the recommended route, and the required time is displayed. Therefore, the user can know the required time from the current location of the vehicle to the predetermined position of the map displayed by scrolling the map with higher accuracy than in the case of estimating from the linear distance.

-First embodiment-
FIG. 1 shows a navigation device 1 according to a first embodiment. When the map displayed on the display monitor 16 is scrolled, the navigation device 1 displays on the display monitor 16 the required time from the vehicle position to the position corresponding to the center of the displayed map screen. The navigation device 1 has a control circuit 11, ROM 12, RAM 13, current location detection device 14, image memory 15, display monitor 16, speaker 17, input device 18, VICS (road traffic information system) information receiving unit 19 and disk drive 110. is doing. The disk drive 110 is loaded with a DVD-ROM 111 in which map data is stored.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area. When the control circuit 11 performs a predetermined route search process based on the map data stored in the DVD-ROM 111, the processing result is displayed on the display monitor 16 as a recommended route.

  The current location detection device 14 is a device that detects the current location of the vehicle. The current location device 14 includes a vibration gyro 14a, a vehicle speed sensor 14b, a GPS (Global Positioning System) sensor 14c, and the like. The vibration gyro 14a detects the traveling direction of the vehicle, the vehicle speed sensor 14b detects the vehicle speed, and the GPS sensor 14c detects a GPS signal from a GPS satellite. The navigation device 1 determines a map display range, a route search start point, and the like based on the current location of the vehicle detected by the current location detection device 14, and displays the current location on the map.

  The image memory 15 stores image data to be displayed on the display monitor 16. This image data includes map drawing data and various graphic data, which are appropriately generated based on the map data stored in the DVD-ROM 111. The navigation device 1 can perform map display and the like by using the image data generated in this way.

  The disk drive 110 reads map data from the DVD-ROM 111. The map data includes map display data, route search data, and the like. The map display data and the route search data include road link information and node information stored in the map data. The map display data has map data of a plurality of scales from wide areas to details, and the scale of the display map can be changed according to a user request. The map data may be read from a recording medium other than the DVD-ROM 111, such as a CD-ROM or a hard disk.

  The display monitor 16 provides the user with various information such as a map near the vehicle position as a screen display based on various information such as map data. The speaker 17 outputs sound for instructing the user to perform various input operations and for guiding the route.

  The input device 18 has an input switch for a user to set various commands, and is realized by an operation panel or a remote control. The remote control is provided with a joystick, and the map displayed on the display monitor 16 can be scrolled by using the joystick. Details of the joystick provided in the remote controller will be described later.

  The user can operate the input device 18 to set the scroll distance display mode from a predetermined menu screen. When the scroll distance display mode is set, the required time from the vehicle position to the position in the center of the map after scrolling is displayed. Further, the user sets the destination by operating the input device 18 in accordance with an instruction on the display screen of the display monitor 16 or a voice instruction from the speaker 17.

  When the destination is set by the user, the navigation apparatus 1 performs a route calculation from the current location detected by the GPS sensor 14c to the destination based on a predetermined algorithm. Such route calculation is hereinafter referred to as route search. The route thus obtained (hereinafter referred to as a recommended route) is displayed on the screen in a manner different from other roads by changing the display form, for example, the display color. Thereby, the user can recognize the recommended route on the map on the screen. The navigation device 1 instructs the user in the direction of travel using a screen or voice so that the vehicle can travel according to the recommended route, thereby guiding the route of the vehicle.

  The VICS information receiving unit 19 receives VICS information such as traffic jam information supplied from a VICS information center (not shown) and outputs it to the control circuit 11. This VICS information is transmitted mainly by radio beacons installed on highways, optical beacons installed mainly on general roads, or FM multiplex broadcasting. Radio wave beacons and optical beacons transmit VICS information to vehicles passing near the installation site, and FM multiplex broadcasting covers a wider communication area. The navigation device 1 receives the VICS information transmitted by them by the VICS information receiving unit 19. The traffic information received by the VICS information receiving unit 19 is reflected in the route search. For example, the route search is performed after weighting the distance of the congested section twice.

  Next, the remote controller 20 will be described with reference to FIG. As shown in FIG. 2A, the remote controller 20 includes a joystick 22, a return button 24, a menu button 25, a wide area button 26, a detail button 27, and a current location button 28. In addition, a remote controller light emitting unit 21 for transmitting the operation content of the remote controller 20 to the navigation device 1 main body is provided at the tip of the remote controller 20. In the remote controller 20, the direction of the position of the remote controller light emitting unit 21 is hereinafter referred to as an upward direction.

  A joystick 22 is provided in the upper half of the remote controller 20. Around the joystick 22, there are provided marks 23 in eight directions: upward, diagonally upward to the right, diagonally downward to the right, downward, diagonally downward to the left, diagonally to the left, and diagonally upward to the left. As a result, the direction in which the joystick is tilted is known. As shown in FIG. 2B, the joystick 22 is tilted in eight directions: upward, diagonally upward, rightward, diagonally downward to the right, downward, diagonally downward to the left, leftward, and diagonally upward to the left. be able to. The map displayed on the display monitor 16 is scrolled in this tilt direction. In addition to tilting the joystick 22, the joystick 22 can be pressed as shown in FIG. When the joystick 22 is pressed, detailed information about the position corresponding to the center of the map screen is displayed on the display monitor 16. For example, when a facility is displayed at a position corresponding to the center of the map screen, the facility name, business content, etc. of the facility are displayed.

  Explaining the buttons provided on the remote controller 20 other than the joystick 22, the return button 24 is a button for returning the display screen of the display monitor 16 to the previous display screen. The menu button 25 is for displaying a menu for selecting a function of the navigation device 1. The wide area button 26 is for switching the map displayed on the display monitor 16 to a map with a smaller scale ratio. The detail button 27 is for switching the map to a map with a larger scale ratio. The current location button 28 is for switching the display to a map on which the current location of the vehicle is displayed.

  Next, with reference to FIG. 3, the display of the required time of the navigation apparatus 1 in one embodiment of the present invention will be described. The following processing is executed when the scroll distance display mode is set. FIG. 3A is a diagram showing a display screen of the display monitor 16 displaying a map 30 around the vehicle position. When the map 30 is displayed on the display monitor 16, the map 30 around the vehicle position is first displayed. The vehicle position mark 31 is displayed on the map 30 so as to overlap the vehicle position. Next, when the joystick 22 of the remote controller 20 is tilted and the map 30 is scrolled, for example, a display screen of the map 30 as shown in FIG. 3B is displayed. A cursor 32 is displayed at the center of the scrolled map 30. Further, on the upper left of the display screen, a time estimated to be required to move from the own vehicle position to the center position of the map 30, that is, a required time 33 is displayed.

  The required time from the current location of the vehicle to the position corresponding to the center of the map screen is calculated as follows. The current location of the vehicle is set as the departure location, and the cursor position 32 corresponding to the center of the map 30 displayed on the display monitor 16 is set as the destination. Then, a route search is made for a recommended route between the set departure point and destination. The required time is calculated from the searched recommended route. This required time is the required time from the current location of the vehicle to the position corresponding to the center of the map screen. The travel time of the link is used to calculate the required time. VICS traffic information is also used.

  When the required time is displayed in the scroll distance display mode, the searched route is not displayed and the route is not guided. When the scroll distance display mode is not set, the required time display process is not performed even if the map is scrolled by a scroll operation.

  Next, the display processing of the required time displayed when the map is scrolled according to the embodiment of the present invention will be described with reference to the flowchart of FIG. The processing of FIG. 4 is performed in the control circuit 11 by executing a program that starts when the map 30 is displayed on the display screen of the display monitor 16.

  In step S401, it is determined whether the scroll distance display mode is set. If the scroll distance display mode is set, an affirmative determination is made in step S401 and the process proceeds to step S402. If the scroll distance display mode is not set, a negative determination is made in step S401, and the process proceeds to step S408. In step S402, it is determined whether a signal for scrolling the map 30 is input from the input device 18 such as the joystick 20. If it is input, an affirmative decision is made in step S402, and the process proceeds to step S403. If not input, a negative determination is made in step S402, and the process proceeds to step S408. In step S403, the map 30 is scrolled in the direction instructed by the input signal.

  In step S404, it is determined whether a scroll instruction signal for the map 30 has been input. If it is input, an affirmative decision is made in step S404 and the process returns to step S403. If not input, a negative determination is made in step S404, and the process proceeds to step S405. In step S405, the coordinates on the map corresponding to the center of the display screen of the display monitor 16 are detected. In step S406, a recommended route is searched by setting the position corresponding to the center of the display screen as the destination, with the vehicle position as the departure point. In step S407, the required time is calculated from the searched recommended route, and the required time 33 of the recommended route is displayed on the display monitor 16. In step S408, it is determined whether the map 30 is displayed on the display monitor 16. If it is displayed, an affirmative determination is made in step S408, and the process returns to step S401. If not, a negative determination is made in step S408, and the process ends.

The navigation device 1 according to the above embodiment has the following effects.
When the map 30 displayed on the display screen of the display monitor 16 is scrolled, the recommended route from the current position of the vehicle to the center position of the scrolled map 30 is searched, and the required time of the recommended route Is displayed. Therefore, the user can know the required time from the current location of the vehicle to the center position of the map 30 displayed by scrolling the map with higher accuracy than in the case of estimating it from the straight line distance to the center position of the map 30. it can.

-Second Embodiment-
A navigation device according to a second embodiment of the present invention will be described. The configuration of the navigation device of the second embodiment is common to the navigation device 1 of the first embodiment. In the navigation device 1 of the first embodiment, when the scroll of the map 30 is stopped, the calculation of the required time 33 is started and the required time 33 is displayed. However, in the navigation device of the second embodiment, the required time 33 is displayed only when scrolling of the map 30 is stopped for a predetermined time or more. In this way, the user can determine whether to stop scrolling in order to confirm the required time, or whether to start scrolling immediately after stopping. Thereby, the scroll of the map 30 is started before the required time 33 is displayed, and it is possible to prevent the required time different from that of the displayed map 30 from being displayed. The required time display processing in this case is as shown in the flowchart of FIG. Steps common to the processing in FIG. 4 are denoted by common reference numerals, and different portions from the processing in FIG. 4 will be mainly described.

  If a negative determination is made in step S404, the process proceeds to step S501. In step S501, the calculation of the required time is not started, and a predetermined time (for example, 0.3 seconds) is waited. In step S <b> 502, it is determined again whether a scroll instruction signal for the map 30 has been input. If it is input, an affirmative decision is made in step S502, and the process returns to step S403. If not input, a negative determination is made in step S502, and the process proceeds to step S405.

-Third embodiment-
A navigation device according to a third embodiment of the present invention will be described. The configuration of the navigation device of the third embodiment is common to the navigation device 1 of the first embodiment. In the navigation device of the third embodiment, when scrolling the map 30 and stopping the scroll are repeated, the required time is calculated as follows. The recommended route is searched using the position on the map corresponding to the center of the screen when the previous scrolling is stopped as the starting point and the position on the map corresponding to the center of the screen when the current scrolling is stopped as the destination. Then, a required time is calculated from the searched recommended route. The required time calculated this time is added to the previously calculated required time and displayed as the required time from the vehicle position to the position corresponding to the center of the current screen.

  Compared to the route search between the vehicle position and the position on the map corresponding to the center of the screen when the current scroll is stopped, the distance between the two points to be searched is shorter, so the required time The processing time for calculating is shortened. The required time display processing in this case is as shown in the flowcharts of FIGS. Steps common to the processing in FIG. 4 are denoted by common reference numerals, and different portions from the processing in FIG. 4 will be mainly described.

  If a positive determination is made in step S401, the process proceeds to step S601. In step S601, the value of the parameter n for identifying the destination is set to 1. Then, the process proceeds to step S402. If a negative determination is made in step S401, the process proceeds to step S602. In step S602, it is determined whether the map 30 is displayed on the display monitor 16. If it is displayed, an affirmative determination is made in step S602, and the process returns to step S401. If not displayed, a negative determination is made in step S602, and the process ends.

  After the process of step S405, in step S603, the recommended route is searched for using the position of the vehicle as the departure point and the position on the map corresponding to the center of the display screen as the destination n. In step S604, a required time T1 between the vehicle position and the destination n (here, n = 1) is calculated. Then, the process proceeds to step S407. If the determination in step S408 is affirmative, the process proceeds to step S701 in FIG.

  In step S701, it is determined whether a scroll instruction signal for the map 30 has been input. If it is input, an affirmative decision is made in step S701 and the process proceeds to step S702. If not input, a negative determination is made in step S701, and the process proceeds to step S804 in FIG. In step S702, the map 30 is scrolled in the direction instructed by the input signal.

  In step S703, it is determined whether a scroll instruction signal for the map 30 has been input. If it is input, an affirmative decision is made in step S703, and the process returns to step S702. If not input, a negative determination is made in step S703, and the process proceeds to step S704. In step S704, the value of n + 1 is set to the value of parameter n for identifying the destination. In step S705, the coordinates on the map corresponding to the center of the display screen of the display monitor 16 are detected. In step S706, the destination n-1 is set as the departure point, the position corresponding to the center of the display screen is set as the destination n, and the recommended route is searched. In step S707, the required time Tn of the recommended route between the destination n and the destination n-1 is calculated. Then, the process proceeds to step S801 in FIG.

  In step S801 in FIG. 8, it is determined whether the value of the parameter n for identifying the destination is 3 or more. When the value of n is 3 or more, an affirmative determination is made in step S802, and the process proceeds to step S802. If the value of n is 2, a negative determination is made in step S801, and the process proceeds to step S803. In step S802, the total required time Sn is set to a value obtained by adding the required total time Tn of the recommended route between the destination n and the destination n-1 to the previous total required time Sn-1. In step S803, the value of the total required time Sn is set to a value obtained by adding the required time T2 of the recommended route between the destination 2 and the destination 1 to the required time T1 between the vehicle position and the destination 1. . In step S804, the total required time Sn is displayed on the display monitor 16. In step S805, it is determined whether the map 30 is displayed on the display monitor 16. If it is displayed, an affirmative determination is made in step S805, and the process returns to step S701 in FIG. If not displayed, a negative determination is made in step S805, and the process ends.

  Also in this case, similarly to the second embodiment, when the scroll of the map 30 is stopped for a predetermined time or more, calculation of the required time may be started and displayed.

  The third embodiment may be modified as follows. Let a be the linear distance between the vehicle position and the position on the map corresponding to the center of the screen when the current scroll is stopped. A linear distance b between the position on the map corresponding to the center of the screen when the previous scrolling is stopped and the position on the map corresponding to the center of the screen when the current scrolling is stopped. Only when the ratio of b to a (b / a) is smaller than a predetermined value, the required time may be calculated as described above. The reason why the required time is recalculated from the own vehicle position even though the map 30 is scrolled only a little is wasteful.

You may deform | transform the navigation apparatus of the above 1st-3rd embodiment as follows.
(1) As shown in FIG. 9, the facility name corresponding to the position of the cursor 32 may be displayed on a balloon 34 or a pop-up screen. Further, the longitude / latitude information may be displayed instead of the facility name or together with the facility name. This is convenient because the position of the cursor 32 can be specifically recognized.

(2) If the predetermined position on the map displayed on the display screen after scrolling the map 30 is set, the destination set when calculating the required time is limited to the position on the map corresponding to the center of the display screen. Not.

(3) Although the map 30 is scrolled by the remote controller 20, when a touch panel monitor is used, the map may be scrolled by a touch operation on the panel.

(4) If it is a map display device, it is not limited to a navigation device.

  The above description is merely an example, and the present invention is not limited to the above embodiment.

The correspondence between the elements of the claims and the embodiments will be described.
The detection means of the present invention corresponds to the current position detection device 14 and the scroll means corresponds to the control circuit 11 and the input device 18. Search means, calculation means, and display means correspond to the control circuit 11. In addition, the above description is an example to the last, and when interpreting invention, it is not limited to the correspondence of the component of said embodiment and the component of this invention at all.

It is a block diagram which shows the structure of the navigation apparatus of the 1st Embodiment of this invention. 2A is a diagram for explaining the external appearance of the remote controller, FIG. 2B is a diagram for explaining a tilting operation of the joystick, and FIG. 2C is a diagram explaining a pressing operation of the joystick. FIG. FIG. 3A is a diagram for explaining a map around the vehicle position displayed on the display screen of the display monitor, and FIG. 3B is a diagram for explaining the map displayed after scrolling. is there. It is a flowchart for demonstrating the display process of the required time displayed when the map in the 1st Embodiment of this invention is scrolled. It is a flowchart for demonstrating the display process of the required time displayed when the map in the 2nd Embodiment of this invention is scrolled. It is a flowchart for demonstrating the display process of the required time displayed when scrolling the map in the 3rd Embodiment of this invention. It is a flowchart for demonstrating the display process of the required time displayed when scrolling the map in the 3rd Embodiment of this invention. It is a flowchart for demonstrating the display process of the required time displayed when scrolling the map in the 3rd Embodiment of this invention. It is a figure for demonstrating the map which displayed the facility name corresponding to the position of a cursor with the speech balloon.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 11 Control circuit 14 Present location detection apparatus 16 Display monitor 19 VICS information receiving part 20 Remote control 22 Joystick 31 Own vehicle position mark 32 Cursor 33 Time required

Claims (2)

Detection means for detecting the current location of the vehicle ;
Display means for displaying a map;
Map scroll means for scrolling the map displayed on the display means;
Search means for searching for a recommended route from the current location detected by the detection means to a predetermined position included in the map after being scrolled by the map scroll means;
Calculating means for calculating a required time of the recommended route searched by the searching means;
A required time display means for displaying the required time without displaying the recommended route on the display means;
Equipped with a,
When the map scroll means further scrolls the map after being scrolled by the map scroll means, the search means includes a first predetermined position included in the map after the previous scroll and a map after the current scroll. If the ratio of the straight line distance between the second predetermined position and the straight line distance between the current position and the second predetermined position is smaller than a predetermined value, the first predetermined position from the current position is determined. Searching for a first recommended route to a position and a second recommended route from the first predetermined position to the second predetermined position;
The map display apparatus characterized in that the required time display means displays the total time required for the first recommended route and the required time for the second recommended route . The map display device according to claim 1,
The required time display means does not display the required time when the map scroll means further scrolls the map after being scrolled by the map scroll means within a predetermined time.

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