JP2008286577A - Navigation device, route guiding method, route guiding program, and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device and a route guiding method capable of performing proper route guide both in a loaded state on a moving body and in an unloaded state on the moving body. <P>SOLUTION: This navigation device which is constituted mountably on/dismountably from the moving body such as a vehicle can perform route guide or the like in the loaded state on the vehicle, and can be used as a navigation device by being carried during walking by a user even in the dismounted state from the vehicle. It is detected by a using state detection means whether the device is in the loaded state mounted on the moving body or in the unloaded state dismounted therefrom. Route guide is executed in each different mode in the loaded state and in the unloaded state. Hereby, proper route guide is possible corresponding to a difference of each state during traveling of the vehicle or during walking or the like. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a navigation device that is detachable from a moving body.

  There is known a navigation device that can be used in a state where it is mounted on a moving body such as a vehicle, and can be removed from the moving body and taken outside to be used when walking (for example, see Patent Document 1).

JP 2004-165889 A

  When route guidance is executed in the navigation device as described above, suitable guidance timings differ between when mounted on a vehicle and when not mounted (generally when used while walking). For example, it is difficult to accurately obtain the speed of the user who is walking, and sometimes the walking is temporarily stopped. Therefore, it is difficult to predict the time for the user to reach the next intersection. For this reason, it is considered appropriate to perform route guidance based on the distance to the next guidance point. However, since the moving speed differs greatly between on-board and walking, the appropriate route guidance timing and walking on the vehicle Sometimes different from the appropriate route guidance timing. For example, when the vehicle is mounted, route guidance is output at points where the distance to the next guide point is 100 m, 50 m, and 30 m. In this case, if route guidance is output at the same timing during walking, guidance is too early. In such a case, if another intersection exists between the current position and the next guidance point, the user is confused.

  The above-mentioned thing is mentioned as an example as a subject which the present invention tends to solve. An object of the present invention is to provide a navigation device and a route guidance method capable of providing appropriate route guidance both in a state of being mounted on a mobile body and in a state of being not mounted on a mobile body.

  The invention according to claim 1 is a navigation device that can be attached to and detached from a mobile body, and detects whether the mobile body is in a mounted state or a non-mounted state that is detached from the mobile body. It is characterized by comprising use state detection means and route guidance means for executing route guidance in a different manner between the mounted state and the non-mounted state.

  The invention according to claim 11 is a route guidance method executed in a navigation device that can be attached to and detached from a moving body, wherein the route guiding method is mounted on the moving body or is not mounted removed from the moving body. A use state detecting step for detecting whether the vehicle is in a state, and a route guide step for performing route guidance in a different manner between the mounted state and the non-mounted state.

  The invention according to claim 12 is a route guidance program that is executed in a navigation device that includes a computer and is detachable from the mobile body, and is installed in the mobile body or from the mobile body. And causing the computer to function as a use state detection unit that detects whether the device is in a removed non-mounted state, and a route guide unit that performs route guidance in a different manner between the mounted state and the non-mounted state. Features.

  In a preferred embodiment of the present invention, the navigation device that can be attached to and detached from the moving body is in a usage state that detects whether the navigation device is in a mounted state attached to the moving body or a non-mounted state that is detached from the moving body. Detection means, and route guidance means for performing route guidance in different modes depending on the mounted state and the non-mounted state.

  Said navigation apparatus is comprised so that attachment or detachment is possible with respect to moving bodies, such as a vehicle. In addition to being able to provide route guidance while mounted on a vehicle, the user can carry it while walking and use it as a navigation device even when it is removed from a moving body. Whether it is in a mounted state attached to the moving body or a non-mounted state in which it is removed is detected by the use state detecting means. Then, route guidance is executed in a different manner between the mounted state and the non-mounted state. Therefore, appropriate route guidance is possible according to the difference in the situation such as whether the vehicle is running or walking.

  In one aspect of the above navigation device, the route guidance means varies the output timing of route guidance between the mounted state and the non-mounted state. This makes it possible to provide route guidance at an appropriate timing in consideration of the difference between the vehicle traveling speed and the human walking speed. In a preferred example, the route guidance means varies the number of times the route guidance is output and / or the guidance output distance, which is the distance between the next guidance point and the point where the route guidance is output.

  In another aspect of the above navigation device, the route guidance means outputs route guidance after an intersection no longer exists until the next guidance point in a non-mounted state. Since the traveling speed is slow in the non-mounted state, if another intersection exists in front of the guidance point, the user may mistake the intersection as the guidance point. Therefore, such misrecognition is prevented by outputting route guidance after there is no other intersection.

  In another aspect of the above navigation device, the route guidance means, when not mounted, provides route guidance at regular intervals after it outputs the route guidance once and passes through the next guidance point. Output. Since the traveling speed is slow in the non-mounted state, it may take time to reach the guidance point after outputting the route guidance. Therefore, the route guidance is repeatedly output every predetermined time until the guide point is reached.

  Another aspect of the navigation device includes a display control unit that displays a map on a display device, and the display control unit sets the scale of the map to the maximum when the mounting state is changed to the non-mounting state. Change to a detailed map scale. It is preferable to display the most detailed map because the running speed is slow mainly in a non-mounted state corresponding to walking.

  Another aspect of the navigation device includes display control means for displaying a map on a display device, and the route guidance means has different display modes that can be distinguished from each other in the mounted state and the non-mounted state. A guide route is displayed on the map. Thereby, a guidance route can be displayed in a suitable mode according to each state.

  Another aspect of the navigation device includes a display device that displays a map, and a luminance adjustment unit that varies the luminance of the display device between the mounted state and the non-mounted state. Since the battery capacity, the brightness of the surroundings, and the like are different between a mounting state in a vehicle or the like and a non-mounting state such as walking, it is preferable to adjust the brightness of the display device according to the situation.

  In another aspect of the above navigation device, the route guidance means outputs voice guidance, and changes the volume of the voice guidance between the mounted state and the non-mounted state. Since the ambient noise level is different between a mounted state in a vehicle or the like and a non-mounted state such as walking, it is preferable to adjust the volume of the voice guidance according to the situation.

  In a preferred example of the navigation device, the moving body is provided with a sensor, and the use state detecting means is in the mounted state or not mounted based on the presence or absence of an output signal from the sensor. It is determined whether it is in a state.

  In another preferred embodiment of the present invention, the route guidance method executed in the navigation device attachable to and detachable from the moving body is in a mounted state attached to the moving body, or is not mounted removed from the moving body. A use state detection step for detecting whether the vehicle is in a state, and a route guidance step for performing route guidance in a different manner between the mounted state and the non-mounted state. Since route guidance is executed in a different manner between the mounted state and the non-mounted state, appropriate route guidance is possible depending on the difference in the situation such as whether the vehicle is running or walking.

  In another preferred embodiment of the present invention, the route guidance program executed in the navigation device having a computer and detachable from the moving body is in a mounted state attached to the moving body or from the moving body. The computer is caused to function as a use state detection unit that detects whether the device is in a removed non-mounted state, and a route guide unit that performs route guidance in a different manner between the mounted state and the non-mounted state. Since route guidance is executed in a different manner between the mounted state and the non-mounted state, appropriate route guidance is possible depending on the difference in the situation such as whether the vehicle is running or walking. The route guidance program is preferably stored in a storage medium and handled.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[Navigation device]
FIG. 1 shows a configuration of a navigation apparatus 1 according to an embodiment of the present invention. As shown in FIG. 1, the navigation device 1 includes a self-supporting positioning device 10, a GPS receiver 18, a system controller 20, a disk drive 31, a data storage unit 36, a communication interface 37, a communication device 38, a display unit 40, a voice output. A unit 50 and an input device 60 are provided.

  The navigation device 1 according to the present embodiment is configured to be detachable from a moving body such as a vehicle. Specifically, the autonomous positioning device 10 shown in FIG. 1 is fixedly mounted on the vehicle. On the other hand, components other than the self-supporting positioning device 10 are configured as a portable unit 1x that can be detached from the vehicle.

  The autonomous positioning device 10 includes an acceleration sensor 11, an angular velocity sensor 12, and a distance sensor 13. The acceleration sensor 11 is made of, for example, a piezoelectric element, detects vehicle acceleration, and outputs acceleration data. The angular velocity sensor 12 is composed of, for example, a vibrating gyroscope, detects the angular velocity of the vehicle when the direction of the vehicle is changed, and outputs angular velocity data and relative azimuth data. The distance sensor 13 measures a vehicle speed pulse composed of a pulse signal generated with the rotation of the vehicle wheel.

  The GPS receiver 18 receives radio waves 19 carrying downlink data including positioning data from a plurality of GPS satellites. The positioning data is used to detect the absolute position of the vehicle from latitude and longitude information.

  The system controller 20 includes an interface 21, a CPU 22, a ROM 23, and a RAM 24, and controls the entire navigation device 1.

  The interface 21 performs an interface operation with the acceleration sensor 11, the angular velocity sensor 12, the distance sensor 13, and the GPS receiver 18. From these, vehicle speed pulses, acceleration data, relative azimuth data, angular velocity data, GPS positioning data, absolute azimuth data, and the like are input to the system controller 20. The CPU 22 controls the entire system controller 20. The ROM 23 includes a nonvolatile memory (not shown) in which a control program for controlling the system controller 20 is stored. The RAM 24 stores various data such as route data preset by the user via the input device 60 so as to be readable, and provides a working area to the CPU 22.

  A system controller 20, a disk drive 31 such as a CD-ROM drive or a DVD-ROM drive, a data storage unit 36, a communication interface 37, a display unit 40, an audio output unit 50, and an input device 60 are mutually connected via a bus line 30. It is connected to the.

  The disk drive 31 reads and outputs content data such as music data and video data from a disk 33 such as a CD or DVD under the control of the system controller 20. The disk drive 31 may be either a CD-ROM drive or a DVD-ROM drive, or may be a CD and DVD compatible drive. The disk drive 31 may be provided outside the portable unit 1x and fixed to the vehicle.

  The data storage unit 36 is composed of, for example, an HDD and stores various data used for navigation processing such as map data and facility data.

  The communication device 38 includes, for example, an FM tuner, a beacon receiver, a mobile phone, a dedicated communication card, and the like, and traffic congestion and traffic information distributed from a VICS (Vehicle Information Communication System) center via the communication interface 37, etc. Receive road traffic information and other information.

  The display unit 40 displays various display data on a display device such as the display 44 under the control of the system controller 20. Specifically, the system controller 20 reads map data from the data storage unit 36. The display unit 40 displays the map data read from the data storage unit 36 by the system controller 20 on the display screen of the display 44. The display unit 40 includes a graphic controller 41 that controls the entire display unit 40 based on control data sent from the CPU 22 via the bus line 30 and a memory such as a VRAM (Video RAM), and can display image information that can be displayed immediately. A buffer memory 42 that temporarily stores, a display control unit 43 that controls display of a display 44 such as a liquid crystal display or a CRT (Cathode Ray Tube) based on image data output from the graphic controller 41, and a display 44 are provided. . The display 44 is composed of, for example, a liquid crystal display device having a diagonal of about 5 to 10 inches, and is mounted near the front panel in the vehicle.

  The audio output unit 50 includes a D / A converter 51 that performs D / A conversion of audio digital data sent via the bus line 30 from the disk drive 31 or the RAM 24 under the control of the system controller 20, and a D / A An amplifier (AMP) 52 that amplifies the audio analog signal output from the converter 51 and a speaker 53 that converts the amplified audio analog signal into audio and outputs the audio to the vehicle are configured.

  The input device 60 includes keys, switches, buttons, a remote controller, a voice input device, and the like for inputting various commands and data. The input device 60 is disposed around the front panel and the display 44 of the main body of the in-vehicle electronic system mounted in the vehicle. When the display 44 is a touch panel system, the touch panel provided on the display screen of the display 44 also functions as the input device 60.

  FIG. 2 is a block diagram showing a functional configuration for performing route guidance and map display according to the present embodiment. In this embodiment, the system controller 20 that executes various processes such as route guidance and map display is connected to the self-supporting positioning device 10, the display unit 40, and the audio output unit 50 as shown in FIG. The display unit 40 includes a display 44. The display 44 is a liquid crystal display device, for example, and includes a backlight unit 45.

  The system controller 20 includes an interface 21 for acquiring output data from various sensors 11 to 13 constituting the self-supporting positioning device 10. Further, as described above, the interface 21 includes a connector or the like (not shown) and can be detached from the self-supporting positioning device 10.

  The system controller 20 executes a program stored in the RAM 24 to thereby execute a use state detection unit 101, a map scale control unit 102, a road painting mode control unit 103, a brightness adjustment unit 104, a guidance output control unit 105, and a volume control unit. It functions as 106.

  The usage state detection unit 101 detects the usage state of the navigation device 1. Specifically, the use state detection unit 101 detects whether the portable unit 1x of the navigation device 1 is mounted on the moving body or not mounted. There are several methods for detecting the usage state as follows.

  The first detection method uses vehicle speed pulses output from the distance sensor 13 in the self-supporting positioning device 10. That is, the navigation device 1 (portable unit 1x) is determined to be mounted when the vehicle speed pulse is supplied from the distance sensor 13, and the navigation device 1 is not mounted when the vehicle speed pulse is not supplied. Judge that there is.

  The second detection method uses the presence or absence of signal level vibration output from a vibration sensor, an acceleration sensor, or the like. For example, when the signal level output from the acceleration sensor 11 in the self-contained positioning device 10 does not change at a predetermined cycle, the navigation device 1 is determined to be mounted, and when the signal level changes at a predetermined cycle, the navigation device 1. Is determined to be in a non-mounted state.

  The third detection method is a method that uses the electrical connection state of the interface 21. That is, by detecting the potential of the connector of the interface 21 or the like, it is determined whether or not the portable unit 1x is connected to the self-supporting positioning device 10 attached to the moving body. Note that the above detection method is an example, and in the present invention, the usage state of the navigation device 1 may be detected by a method other than the above.

  The use state detection unit 101 detects whether the use state of the navigation device 1 is a mounted state or a non-mounted state by the method as described above, and the result is used as a map scale control unit 102 and a road painting mode control unit 103. , To the brightness adjusting unit 104, the guidance output control unit 105, and the volume control unit 106.

  The map scale control unit 102 changes the scale of the map displayed on the display 44 based on the usage state of the navigation device 1. Specifically, when the navigation device 1 is mounted, the map scale control unit 102 displays the map at a scale specified by the user. On the other hand, when the navigation device 1 is removed from the vehicle and is not mounted, the map scale control unit 102 changes the map scale so that the most detailed map is displayed. This is because, in a non-mounted state, the user is considered to use the navigation device 1 while walking, so the moving speed (walking speed) is sufficiently low and it is appropriate to display the most detailed map. In addition, since it can be assumed that, for example, the user uses a bicycle in the non-mounted state, it is desirable that the scale of the map automatically displayed when changing to the non-mounted state can be changed by the user's operation. .

  The road painting mode control unit 103 changes the display mode of route guidance, more specifically, the road painting mode of the guidance route displayed on the display 44 based on the usage state of the navigation device 1. In other words, the guide route displayed on the map is displayed in different display modes that can be distinguished from each other depending on the mounted state and the non-mounted state. Although a specific example will be described later, for example, depending on the use state of the navigation device 1, the color of the road paint is changed, the type of line such as a solid line and a broken line is used properly, the display position or thickness of the road paint on the road is changed, And the like.

  The brightness adjustment unit 104 adjusts the brightness of the display 44, more specifically, the brightness of the backlight unit 45, based on the usage state of the navigation device 1. Specifically, when the navigation device 1 is mounted, a vehicle battery can be used as a power source, so that the brightness of the backlight unit 45 is set high and bright display is performed. On the other hand, in the non-mounted state, since the battery capacity of the portable unit 1x is limited, the luminance of the backlight unit 45 is changed to be low. As a result, battery consumption during portable use can be reduced.

  Since the surroundings are bright during walking in the daytime, a bright display may be required even in a non-mounted state. Therefore, it is desirable that the brightness adjusted by the brightness adjusting unit 104 in the mounted state and the non-mounted state can be set or adjusted in advance by the user.

  The guidance output control unit 105 controls the output timing of route guidance, mainly voice guidance, based on the usage state of the navigation device 1. Here, the “voice guidance output timing” is a concept including the number of voice guidance outputs and the guidance output distance. “Number of guidance outputs” refers to the number of times voice guidance is output to one guidance point. The “guidance output distance” refers to the distance between the next guidance point in the route guidance and the point where guidance voice related to the guidance point is output. For example, when outputting voice guidance at three points 100m, 50m, and 30m in front of one guidance point, the number of guidance outputs is three and the guidance output distances are 100m, 50m, and 30m, respectively.

  Basically, the guidance output control unit 105 reduces the number of guidance outputs in the non-mounted state and reduces the guidance output distance in the non-mounted state. This is because the movement speed is slower in the non-mounted state where the vehicle is mainly walking than in the mounted state where the vehicle is mainly traveling. For example, in the non-mounted state, the guide output frequency is set to 2 times, and the guide output distance is set to 10 m and 5 m. Note that the number of guidance outputs and the guidance output distance in the non-mounted state can be arbitrarily set by the user. This makes it possible to output route guidance at appropriate guidance timings depending on the situation, such as whether to use while walking or to use while traveling by bicycle.

  In addition, when there is another intersection in front of the next guidance point in the non-mounted state, the guidance output control unit 105 preferably outputs the voice guidance after passing through the intersection. That is, it is preferable to output the voice guidance after passing the last intersection before the intersection that is the next guidance point. Thereby, it can prevent that the user who is walking mistakes a front intersection with a guidance point.

  Furthermore, the guidance output control unit 105 repeatedly outputs voice guidance every predetermined time when the navigation device 1 does not pass the guidance point even after a predetermined time has passed after outputting the voice guidance once in the non-mounted state. It is good to do. This is because during walking or the like, the traveling speed may be temporarily slowed down or somewhere, and it may take more time than usual to move to the next guide point.

  The volume control unit 106 changes the volume of the voice guidance based on the usage state of the navigation device 1. In general, it is more difficult to hear the guidance voice when the vehicle is not installed while walking outside than when the vehicle is running with the vehicle window closed. It is preferable to increase the sound volume. On the other hand, if the guidance voice is too loud during walking, it may annoy nearby people. In such a case, the volume of the guidance voice may be reduced in the non-mounted state. These settings may be performed by the user selecting one of them. Needless to say, the user can adjust the volume of the guidance voice depending on the situation after performing the basic setting in any of the above.

  In the present embodiment, as described above, the route guidance and map display methods are made different depending on the usage state of the navigation device 1, thereby detecting a failure in attaching / detaching the navigation device 1 or a failure in the interface. It is also possible to do. That is, for example, when voice guidance is not output until just before the guidance point even though it is used in a vehicle, the connection of the portable unit 1x is incomplete or the interface is broken. It is possible to estimate such as.

  Hereinafter, various processes based on the usage state of the navigation device will be described.

[Guidance output timing control]
First, guidance output timing control in route guidance will be described.

  FIG. 3 is a flowchart of a first example of guidance output timing control. This process is realized by the CPU 22 in the system controller 20 functioning as the use state detection unit 101 and the guidance output control unit 105.

  First, the system controller 20 receives the destination setting by the user (step S101), and determines whether or not the destination has been reached (step S102). If the destination has been reached (step S102; Yes), the process ends. On the other hand, when it has not arrived at the destination (step S102; No), the use state detection part 101 determines whether the navigation apparatus 1 is a mounting state (step S103).

  When it is in the mounted state (step S103; Yes), the guidance output control unit 105 sets the number of guidance outputs and the guidance output distance to values for the mounted state (step S104). In the above-described example, the guidance output control unit 105 sets the guidance output frequency to 3 times and the guidance output distances to 100 m, 50 m, and 30 m. On the other hand, when it is in the non-mounted state (step S103; No), the guidance output control unit 105 sets the number of times of guidance output and the guidance output distance to values for the non-mounted state (step S105). In the above example, the guidance output control unit 105 sets the number of guidance outputs twice and the guidance output distance to 10 m and 5 m.

  Next, the guidance output control unit 105 determines whether or not the navigation device 1 has entered the guidance output distance with reference to the next guidance point (step S106). Step S106; Yes), voice guidance is output (step S107). On the other hand, when it is not within the guidance output distance (step S106; No), the process returns to step S101.

  As described above, according to the first example of the voice output timing control, the voice guidance output timing, that is, the number of guidance outputs and the guidance output distance change according to the use state of the navigation device 1. Route guidance can be executed at an appropriate timing depending on whether the vehicle is traveling or walking.

  FIG. 4 is a flowchart of a second example of guidance output timing control. In this example, when the navigation device 1 is not mounted, it is determined whether or not there is another intersection before the next guidance point, and the voice is heard when there is no intersection before the next guidance point. Output guidance. This process is realized by the CPU 22 in the system controller 20 functioning as the use state detection unit 101 and the guidance output control unit 105.

  In FIG. 4, steps S111 to S113 are the same as steps S101 to S103 shown in FIG. If it is determined in step S113 that the navigation device 1 is in the mounted state (step S113; Yes), the guidance output control unit 105 sets the number of guidance outputs and the guidance output distance to values for the mounted state (step S114). ). Next, the guidance output control unit 105 determines whether or not the navigation device 1 has entered the guidance output distance with reference to the next guidance point (step S115). Step S115; Yes), voice guidance is output (step S116). On the other hand, when it is not within the guidance output distance (step S115; No), the process returns to step S111.

  On the other hand, when it is determined in step S113 that the navigation device 1 is in the non-mounted state (step S113; No), the guidance output control unit 105 sets the number of guidance outputs and the guidance output distance to values for the non-mounted state. (Step S117). Next, the guidance output control unit 105 determines whether or not the navigation device 1 has entered the guidance output distance based on the next guidance point (step S118). If it is within the guidance output distance (step S118; No), the process returns to step S111. On the other hand, if it is within the guidance output distance (step S118; Yes), it is determined whether there is another intersection before the next guidance point (step S119). This determination is performed by referring to map data stored in the data storage unit 36, for example. Further, the determination of the presence or absence of an intersection may include determination of whether or not there is a road branch.

  If there is an intersection before the guidance point (step S119; Yes), the voice guidance is not output, and the process returns to S111. This prevents the user from erroneously recognizing the intersection existing in front as a guide point. On the other hand, when there is no intersection before the guidance point (step S119; No), the guidance output control unit 105 outputs voice guidance (step S116).

  FIG. 5 is a flowchart of a third example of guidance output timing control. In this example, when the navigation device 1 is not mounted, if the navigation device 1 does not pass the guidance point even after a predetermined time has elapsed after outputting the voice guidance once, the voice guidance is repeatedly performed. This process is realized by the CPU 22 in the system controller 20 functioning as the use state detection unit 101 and the guidance output control unit 105.

  In FIG. 5, steps S121 to S126 are the same as steps S111 to 116 shown in FIG. If it is determined in step S123 that the navigation device 1 is not in the mounted state (step S123; No), the guidance output control unit 105 sets the number of guidance outputs and the guidance output distance to values for the non-mounted state (step S127). ).

  Next, the guidance output control unit 105 determines whether or not the navigation device 1 has entered the guidance output distance based on the next guidance point (step S128). If it is not within the guidance output distance (step S128; No), the process returns to step S121. On the other hand, if it is within the guidance output distance (step S128; Yes), the voice guidance is output (step S129). Subsequently, the guidance output control unit 105 starts time measurement (step S130), and determines whether or not the navigation device 1 has reached the next guidance point (step S131). If the next guide point has been reached (step S131; Yes), the process returns to step S121.

  On the other hand, when the next guidance point is not reached (step S131; No), the guidance output control unit 105 determines whether or not a predetermined time has passed (step S132). When the predetermined time has elapsed (step S132; Yes), the guidance output control unit 105 outputs a voice guidance (step S133) and resets the measurement time (step S134). Thereafter, the process returns to step S130. Thus, until the navigation apparatus 1 reaches the next guidance point (step S131; Yes), voice guidance is output every time a certain period of time elapses. Thereby, even when a user's walk is slow etc., route guidance can be continued appropriately.

[Map scale control]
Next, map scale control will be described. FIG. 6 is a flowchart of map scale control. This process is realized by the CPU 22 in the system controller 20 functioning as the use state detection unit 101 and the map scale control unit 102.

  First, the use state detection unit 101 determines whether the navigation device 1 is in a mounted state or a non-mounted state (step S201). If it is in the mounted state (step S201; Yes), the process proceeds to step 205 described later. On the other hand, when it is not in the mounted state (step S201; No), the map scale control unit 102 determines whether or not the current display map is a detailed map (step S202). Here, the “detailed map” is a scale map that displays the most detailed map, and is a scale that is determined in advance.

  When the current display map is a detailed map (step S202; Yes), the process proceeds to step S205. On the other hand, when it is not a detailed map (step S202; No), the map scale control part 102 changes a display map to a detailed map (step S203). Next, the map scale control unit 201 stores the scale of the detailed map as a drawing scale (step S204). The “drawing scale” is a scale of a map used for map display.

  Next, the map scale control unit 102 determines whether or not the scale has been changed by a user operation or the like (step S205). When the scale is changed (step S205; Yes), the scale after the change is stored as a drawing scale (step S206). On the other hand, when the scale after the change is not changed (step S205; No), the process proceeds to step S207. Therefore, in this case, the drawing scale is not changed. Thereafter, the map scale control unit 102 displays the map at the currently stored drawing scale (step S207).

  Next, the system controller 20 determines whether or not the power of the navigation device 1 has been turned off (step S208). If the power has not been turned off (step S208; No), the process returns to step S201. If the power is turned off (step S208; Yes), the process ends.

  As described above, according to the map scale control, when the navigation device 1 is in the non-installation mode, the display map is automatically changed to a detailed map of a predetermined scale. A small scale map is displayed.

[Road painting mode control]
Next, the road painting mode control in route guidance will be described. “Road painting” refers to a display showing a guidance route by a thick colored line on a display map at the time of route guidance. In the present embodiment, depending on the usage state of the navigation device 1, the manner of road painting is varied.

  FIG. 7 shows a flowchart of road painting mode control. This process is realized by the CPU 22 in the system controller 20 functioning as the use state detection unit 101 and the road painting mode control unit 103.

  First, the system controller 20 receives the destination setting by the user (step S301), and determines whether or not the destination has been reached (step S302). If the destination is reached (step S302; Yes), the process ends. On the other hand, when it has not arrived at the destination (step S302; No), the use state detection part 101 determines whether the navigation apparatus 1 is a mounting state (step S303).

  When it is in the mounted state (step S303; Yes), the road painting mode control unit 103 performs road painting in the loaded state and displays a map (step S304). On the other hand, when it is not in the mounted state (step S303; No), the road painting mode control unit 103 performs road painting in a non-mounted state and displays a map (step S305).

  In the following, description will be given by exemplifying the road coating modes of the mounted state and the non-mounted state. FIGS. 8A and 8B show examples in which the type of road paint line is changed. 8A and 8B, the map display screens 200a and 200b show a vehicle position mark 201 and routed guide routes 202a and 202b. For example, in the mounted state, the guide route 202a is filled with a solid line as shown in FIG. 8A, and in the non-mounted state, the guide route 202b is filled with a broken line as shown in FIG. 8B. On the contrary, the mounted state may be a dotted road coating, and the non-mounted state may be a solid road coating.

  FIGS. 9A and 9B show other examples of road coating in the mounted state. On the map display screen 210a shown in FIG. 9A, the entire road is painted on the guide route 211 in the mounted state. In addition, on the map display screen 210b shown in FIG. 9B, the center of the road is filled in the guide route 212 in the mounted state. On the other hand, FIGS. 10A and 10B show other examples of road coating in a non-mounted state. In the map display screen 210c shown in FIG. 10A, the non-mounted guide route 213 is painted only on the left side of the road. In this case, as a route guidance for pedestrians, the navigation device 1 recommends passing on the left side of the road. In addition, in the map display screen 210d shown in FIG. 10B, only the right side of the road is filled in the non-mounted guide route 214. In this case, as a route guidance for pedestrians, the navigation device 1 recommends passing on the right side of the road.

  In this way, by changing the way of painting the road according to the usage state of the navigation device 1, it is possible to provide appropriate route guidance both when the vehicle is running and while walking.

[Display brightness control]
Next, display brightness control will be described. The display brightness control controls the brightness of the display 44 that displays a map or the like according to the usage state of the navigation device 1. In the present embodiment, it is assumed that the display 44 is a liquid crystal display device and the luminance of the backlight unit 45 is adjusted.

  FIG. 11 shows a flowchart of display brightness control. This process is realized by the CPU 20 in the system controller 20 functioning as the use state detection unit 101 and the brightness adjustment unit 104.

  First, the use state detection unit 101 determines whether or not the navigation device 1 is in a mounted state (step S401). When it is in the mounting state (step S401; Yes), the luminance adjusting unit 104 sets the luminance of the backlight unit 45 to the luminance for mounting state (step S402). On the other hand, when it is not in the mounted state (step S401; No), the luminance adjusting unit 104 sets the luminance of the backlight unit 45 to the luminance for the non-mounted state (step S403). Note that the mounting state luminance and the non-mounting state luminance are determined in advance based on a specific environment, user preference, and the like, as described above.

  Next, the luminance adjustment unit 104 changes the actual luminance of the backlight unit 45 to the luminance set in step S402 or S403 (step S404). Then, the system controller 20 determines whether or not the power of the navigation device 1 has been turned off (step S405). If not turned off (step S405: No), the process returns to step S201. On the other hand, when the power is turned off (step S405; Yes), the process ends.

  As described above, according to the display brightness control, the brightness of the display 44 is automatically switched according to the use state of the navigation device 1, so that a map or the like is displayed with an appropriate brightness according to the use state.

[Guidance volume control]
Next, guidance volume control will be described. The guidance volume control mainly controls the volume of guidance voice in route guidance according to the use state of the navigation device 1.

  FIG. 12 shows a flowchart of guidance volume control. This process is realized by the CPU 20 in the system controller 20 functioning as the use state detection unit 101 and the volume control unit 106.

  First, the use state detection unit 101 determines whether or not the navigation device 1 is in a mounted state (step S501). When it is in the mounting state (step S501; Yes), the volume control unit 106 sets the guidance volume to the mounting state volume (step S502). On the other hand, when not in the mounted state (step S501; No), the volume control unit 106 sets the guidance volume to the volume for the non-mounted state (step S503). Note that, as described above, the volume for the mounting state and the volume for the non-mounting state are determined in advance based on the specific environment, user preference, and the like.

  Next, the volume control unit 106 changes the volume setting of the amplifier 52 according to the guidance volume set in step S502 or S503 (step S504). Thereby, the volume of the guidance voice output from the speaker 53 is changed.

  Then, the system controller 20 determines whether or not the power of the navigation device 1 has been turned off (step S505). If the power has not been turned off (step S505: No), the process returns to step S501. On the other hand, when the power is turned off (step S505; Yes), the process ends.

  As described above, according to the guidance volume control, the volume of the guidance voice in the route guidance automatically changes according to the use state of the navigation device 1, so that the route guidance is provided with an appropriate volume according to the use state. be able to.

[Modification]
In the above embodiment, the present invention is applied to a car navigation apparatus having a removable portable unit, but the application of the present invention is not limited to this. For example, a mobile phone having a GPS function, a small portable terminal device, a game machine, and the like have a navigation function for pedestrians and can be used as an in-vehicle navigation device by using an in-vehicle kit. The present invention can be applied to any case.

It is a block diagram which shows the structure of the navigation apparatus which concerns on an Example. It is a functional block diagram of a system controller. It is a flowchart of the 1st example of guidance output timing control. It is a flowchart of the 2nd example of guidance output timing control. It is a flowchart of the 3rd example of guidance output timing control. It is a flowchart of map scale control. It is a flowchart of road painting mode control. The example of the road painting aspect according to the use condition of a navigation apparatus is shown. The example of the road painting aspect according to the use condition of a navigation apparatus is shown. The example of the road painting aspect according to the use condition of a navigation apparatus is shown. It is a flowchart of display brightness control. It is a flowchart of guidance voice control.

Explanation of symbols

10 Independent positioning device 18 GPS receiver 20 System controller 22 CPU
36 Data storage unit 40 Display unit 60 Input device

Claims (13)

A navigation device detachable from a moving body,
A use state detection means for detecting whether it is in a mounted state attached to the mobile body or a non-mounted state removed from the mobile body;
A navigation apparatus comprising: route guidance means for performing route guidance in a different manner between the mounted state and the non-mounted state.   The navigation device according to claim 1, wherein the route guidance unit varies the output timing of route guidance between the mounted state and the non-mounted state.   3. The route guidance unit according to claim 2, wherein the route guidance unit varies the number of times the route guidance is output and / or the guidance output distance that is the distance between the next guidance point and the point where the route guidance is output. Navigation device.   The navigation device according to claim 2 or 3, wherein the route guidance means outputs route guidance after an intersection no longer exists until the next guidance point in a non-mounted state.   3. The route guidance unit according to claim 2, wherein the route guidance unit outputs the route guidance at regular intervals after the route guidance is output once until it passes through the next guidance point in the non-mounted state. 5. The navigation device according to any one of 4. Comprising display control means for displaying a map on the display device;
The navigation device according to claim 1, wherein the display control unit changes the scale of the map to the most detailed map scale when the mounted state changes to the non-mounted state. Comprising display control means for displaying a map on the display device;
The navigation device according to claim 1, wherein the route guidance unit displays the guidance route on the map in different display modes that are distinguishable from each other in the mounted state and the non-mounted state. A display device for displaying a map;
The navigation device according to claim 1, further comprising: a luminance adjusting unit that varies the luminance of the display device between the mounted state and the non-mounted state.   The navigation apparatus according to claim 1, wherein the route guidance unit outputs voice guidance and changes a volume of the voice guidance between the mounted state and the non-mounted state. The moving body is provided with a sensor,
The said use state detection means determines whether it is the said mounting state or the said non-mounting state based on the presence or absence of the output signal from the said sensor. The navigation device described in 1. A route guidance method executed in a navigation device detachable from a moving body,
A use state detection step of detecting whether the mounting state is attached to the mobile body or the non-mounting state removed from the mobile body;
A route guidance method comprising: a route guidance step of performing route guidance in a different manner between the mounted state and the non-mounted state. A route guidance program that is executed in a navigation device that has a computer and is detachable from a moving body,
Use state detection means for detecting whether the mobile body is mounted or not mounted and removed from the mobile body; and
A route guidance program for causing the computer to function as route guidance means for performing route guidance in a different manner between the mounted state and the non-mounted state.   A storage medium storing the route guidance program according to claim 12.

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