JP5063871B2 - Map display system for portable devices - Google Patents

Description

  The present invention relates to a map display system for portable devices.

  Conventionally, there has been proposed a map display device that can sufficiently enhance the expressive power of a map display and switches between normal display and highly expressive display without requiring a special operation switch (for example, (See Patent Document 1). According to the map display device disclosed in Patent Document 1, for example, map information storage for storing 2D map data for displaying a 2D map and 3D map data for displaying a 3D map. Unit, a display unit, and a tilt sensing unit that senses the tilt angle of the device, and based on the sensed tilt angle, the control unit corresponds to the corresponding two-dimensional map data or three-dimensional map data from the map information storage unit Is read and a two-dimensional map or a three-dimensional map is displayed.

Specifically, the tilt sensing unit outputs an active signal to the control unit when the device is in a “vertical state” with respect to the ground, and inactive when the device is in a “horizontal state”. The signal is output to the control unit. When the inactive signal / active signal is output from the tilt sensing unit, the control unit reads the 2D map data / 3D map data from the map information storage unit, and displays the 2D map / 3D map on the screen of the display unit. indicate.
JP 2004-151752 A

  As described above, in the conventional apparatus, the tilt angle of the conventional apparatus is “horizontal state” or “vertical state” in order to sufficiently enhance the display power of the map display without requiring a special operation switch. Based on whether or not, the two-dimensional map and the three-dimensional map are merely switched and displayed. In addition, the three-dimensional map is a bird's-eye view that does not consider the viewpoint position of the user. Therefore, for example, even when the conventional apparatus is tilted beyond the “vertical state”, the displayed three-dimensional map is the same. That is, the scenery actually visible to the user is different from the 3D map.

  The present invention has been made in view of the above points, and provides a map display system for a portable device capable of displaying a landscape that is actually visible to the holder of the portable device on a display screen as a three-dimensional map. For the purpose.

In order to achieve the above object, a map display system for a portable device according to claim 1,
It consists of an in-vehicle navigation device and a map display device for portable devices.
The in-vehicle navigation device is
Map data storage means for storing map data relating to a three-dimensional map;
A navigation transmission means for transmitting the map data to the map display device for portable devices,
The portable device map display device is applied to a portable device having a display screen, and displays a three-dimensional map on the display screen .
Portable data map data storage means for storing map data for displaying a three-dimensional map;
Current position detecting means for detecting the current position of the portable device;
An inclination angle detecting means for detecting an inclination angle of the display screen of the portable device;
Orientation detecting means for detecting a direction in which the holder of the portable device views the display screen as the orientation of the portable device;
Based on the current position of the portable device, the tilt angle of the display screen, and the orientation of the portable device, a calculating means for calculating a visual field range that is assumed to be viewed by the holder of the portable device behind the display screen;
A three-dimensional map corresponding to the field of view calculated by the calculation means is displayed on the display screen based on the map data so as to correspond to a landscape when viewed from the line of sight of the holder of the portable device. Map display control means ;
Receiving means for portable devices that receive the map data transmitted from the in-vehicle navigation device ,
The portable device map data storage means stores the received map data,
further,
Determining means for determining whether or not the holder of the portable device is walking based on a change in the current position of the portable device;
Instructing means for instructing the map display control means to stop displaying the three-dimensional map when the determination means determines that the holder of the portable device is walking. And

As described above, in the map display device for a portable device according to claim 1, the holder of the portable device is located behind the display screen based on the current position of the portable device, the tilt angle of the display screen, and the orientation of the portable device. The visual field range assumed to be visually recognized is calculated. Then, a three-dimensional map corresponding to the calculated visual field range is displayed on the display screen so as to correspond to the landscape when viewed from the line of sight of the holder of the portable device. Thereby, the scenery actually visible to the holder of the portable device can be displayed on the display screen as a three-dimensional map. In addition, the map display apparatus for portable devices receives the map data regarding the three-dimensional map from the vehicle-mounted navigation device, and stores the received map data.
Further, when the holder of the portable device is walking, the display of the three-dimensional map is stopped and the three-dimensional map is not displayed on the display screen, so that safety can be ensured.

  According to a second aspect of the present invention, the portable device map data storage means has map data for displaying a two-dimensional map, and the holder of the portable device tilts the display screen until it is level with the ground. In this case, the map display control means can display a two-dimensional map with the current position of the portable device as a reference on the display screen. Thus, when the display screen is tilted until it is level with the ground, a two-dimensional map is displayed on the display screen.

  According to a third aspect of the present invention, the distance measuring means for measuring the distance between the holder of the portable device and the portable device has a field-of-view range as the distance measured by the distance measuring means becomes shorter. The visual field range can also be calculated so as to increase. Thereby, a more accurate visual field range can be calculated.

According to a fourth aspect of the present invention, the in-vehicle navigation device includes navigation receiving means for receiving area data indicating a desired area where map data should be transmitted from the map display device for portable devices, and the navigation transmitting means includes: When the navigation receiving means receives the area data, the map data corresponding to the desired area is transmitted, and the portable device map display device includes a selection means for selecting a desired area by the holder of the portable device; A portable device transmitting means for transmitting area data indicating the selected desired area to the in-vehicle navigation device, and the portable device receiving means receives map data corresponding to the desired area from the navigation transmitting means. Can also be received. By doing in this way, the map data applicable to the desired area of the holder of a portable machine can be acquired.

As described in claim 5 , the map data includes facility data relating to facilities on the map data, and based on the facility data, pedestrian destination setting means for setting a pedestrian destination, and the map data Based on this, it is preferable to include a pedestrian guide route searching means for a portable device that searches for a pedestrian guide route from a pedestrian departure point to a pedestrian destination. In this way, a pedestrian guidance route can be searched.

According to a sixth aspect of the present invention, in the in-vehicle navigation device, the map data storage means stores facility data related to facilities on the map data, and based on the facility data, final destination setting means for setting a final destination When there is no parking lot at the facility corresponding to the set final destination, a parking lot search means for searching for a parking lot around the final destination, and the searched parking lot is set as the vehicle destination. Vehicle destination setting means, vehicle guidance route searching means for searching for a vehicle guidance route from the departure point to the vehicle destination, and pedestrian guidance route from the vehicle destination to the final destination A navigation pedestrian guidance route search means, and the navigation transmission means transmits map data relating to the pedestrian guidance route and the pedestrian guidance route to the map display device for portable devices. The portable device receiving means receives the pedestrian guide route and the map data related to the pedestrian guide route transmitted from the in-vehicle navigation device, and the portable device map data storage means receives the received pedestrian guide route. It is preferable that the map data display device for portable devices further includes pedestrian guide route storage means for storing the received pedestrian guide route. By doing in this way, the pedestrian guidance route and the map data regarding the pedestrian guidance route can be received and stored from the in-vehicle navigation device.

As described in claim 7 , the map data includes polygon data obtained by forming a three-dimensional object on a three-dimensional map with polygons and a polygon surface with respect to the polygon data in order to bring the three-dimensional object closer to an actual landscape. It is preferable to include texture data that is data for applying a pattern and sky display data that is data for displaying the sky on the three-dimensional map. By using these data, a three-dimensional map can be generated.

According to the eighth aspect of the present invention, in the in-vehicle navigation device, the map data storage means stores the daytime map data and the nighttime map data as the map data, and the navigation transmission means is connected to the map display device for the portable device. On the other hand, either one of daytime map data or nighttime map data is transmitted according to the current time, and the portable device receiving means is the daytime map data or nighttime data transmitted from the in-vehicle navigation device. It is preferable to receive either one of the map data. Thereby, the map display apparatus for portable devices can receive either daytime map data or nighttime map data according to the current time.

As described in claim 9 , the daytime map data includes the daytime texture data and the sky display data as the daytime sky display data as the texture data, and the nighttime map data as the texture data, It is preferable that night texture data and night sky display data are included as sky display data. Thus, a daytime three-dimensional map can be generated by using daytime map data. Further, a night three-dimensional map can be generated by using the night map data.

According to a tenth aspect of the present invention, it is preferable that the nighttime texture data is for applying a pattern relating to lighting. Thereby, for example, the holder of the portable device can identify the building by turning on a signboard neon light as a pattern related to lighting.

As described in claim 11 , the daytime sky display data varies the sun position according to the current date and time, and the night sky display data varies according to the current date and time. The position of the moon and the constellation and the kind of constellation can be made different. By doing in this way, the holder of a portable machine can grasp the exact sun position etc. according to the present date and time.

As described in claim 12 , the night sky display data may indicate the degree of air contamination in a predetermined area. For example, in the city center, the air is dirty. Thereby, the night sky with higher accuracy can be displayed on the three-dimensional map.

According to a thirteenth aspect of the present invention, it is preferable to include pedestrian route guidance means for performing pedestrian route guidance based on the searched pedestrian guidance route. Thereby, the route guidance for pedestrians can be performed with respect to the holder of a portable device.

As described in claim 14 , the display screen is configured so that the contrast can be changed, and the map display control unit emphasizes the pedestrian guidance route by superimposing it on the road data corresponding to the pedestrian guidance route. The contrast of the display range including the traveling direction in the guide route for the pedestrian may be changed brightly. Thereby, the holder | retainer of a portable machine can grasp | ascertain the advancing direction in the guidance route for pedestrians clearly.

As described in claim 15 , the map display control means can also display only a three-dimensional object along the pedestrian guide route. By doing in this way, the holder of the portable device can clearly grasp the traveling direction in the pedestrian guide route.

(First embodiment)
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an example in which the map display device for a portable device is applied to a cellular phone will be described. FIG. 1 is a block diagram illustrating a schematic configuration of a mobile phone device 300 according to the present embodiment. Hereinafter, the mobile phone device 300 according to the present embodiment will be described in detail.

  As shown in FIG. 1, the mobile phone device 300 includes a display screen 210, a GPS receiver 211, a geomagnetic sensor 212, a tilt angle sensor 213, a computer 220, a first storage unit 230, a second storage unit 240, a third storage unit. Storage unit 245, operation unit 250, audio output unit 260, and communication unit 270. The communication unit 270 communicates with the in-vehicle navigation device 100.

  First, a schematic configuration of the in-vehicle navigation device 100 will be described with reference to FIG. FIG. 2 is a block diagram illustrating a schematic configuration of the in-vehicle navigation device 100 according to the present embodiment.

  As shown in FIG. 2, the in-vehicle navigation device 100 includes a position detector 10, a digital road map database 20, a computer 30, a display unit 40, an operation switch group 50, an audio output unit 60, an audio input unit 70, a storage device 80, And a communication device 90.

  The computer 30 includes a known CPU, ROM, RAM, I / O, and a bus line for connecting these components. In the ROM, a program to be executed by the computer 30 is written, and a CPU or the like executes predetermined arithmetic processing according to this program.

  The position detector 10 includes a GPS receiver 11 for a global positioning system (GPS) that measures the position of a vehicle based on radio waves from a satellite, a geomagnetic sensor 12 for detecting the absolute direction of the vehicle, and a relative direction of the vehicle. Has a steering sensor 13 for detecting. Further, the position detector 10 includes a vehicle speed sensor 14 for detecting a travel distance from the travel speed of the vehicle.

  As described above, the position detector 10 includes the GPS receiver 11 for vehicle position measurement by radio wave navigation, and the geomagnetic sensor 12, the steering sensor 13, and the vehicle speed sensor 14 for vehicle position estimation by self-contained navigation. ing. Further, the radio navigation is not limited to the GPS, but, for example, a VICS optical beacon may be used. Further, in order to detect the relative orientation of the vehicle in the self-contained navigation, a gyro sensor or wheel speed sensors provided on the left and right wheels of the vehicle may be used instead of the steering sensor 13.

  The digital road map database 20 is a device for inputting various map data such as 3D map data, polygon data, texture data, background data, character data, and facility data to the computer 30. The digital road map database 20 has an information storage medium 21 for storing digital map data. As the information storage medium 21, a CD-ROM or a DVD-ROM is generally used depending on the data amount. A card, a hard disk, or the like may be used.

  Here, the three-dimensional map data stored in the storage medium of the digital road map database 20 will be briefly described. First, the three-dimensional map data includes node data regarding points where a plurality of roads intersect, merge and branch, and link data regarding roads connecting the points. The node data includes a node ID with a unique number for each node, node coordinates (latitude / longitude / altitude), node name, connection link ID in which link IDs of all links connected to the node are described, and intersection type It consists of each data such as. The link data includes a link ID with a unique number for each road, link length, start and end coordinates (latitude / longitude / altitude), road type such as expressway and general road, road width, link travel time, etc. It consists of each data.

  The polygon data is formed by polygons of three-dimensional objects such as terrain, facilities such as buildings, and roads. Note that latitude, longitude, and altitude coordinates are assigned to each three-dimensional object in the polygon data, and correspond to the above-described three-dimensional map data.

  The texture data is data for applying a pattern to the polygon surface with respect to the polygon data described above in order to bring a three-dimensional object such as a landform, a building or other facility, or a road close to an actual landscape.

  The background data is data for displaying a background to be displayed other than a three-dimensional object such as a facility such as a building or a road when a three-dimensional map is displayed on the display unit 40. In the present embodiment, there is sky display data for displaying the sky on the three-dimensional map as one of the background data. By using these data, a three-dimensional map can be generated.

  The character data is for displaying place names, facility names, road names, and the like on the road map, and is configured as data in which coordinates on the map corresponding to the display positions are associated.

  The facility data is used for facility search, and is composed of data such as a facility type, a facility name, latitude / longitude coordinates, and a parking lot flag. The parking lot flag in the facility data is set to “1” if a parking lot is provided in the facility corresponding to the facility data, and “0” if no parking lot is provided in the facility. Is set.

  The map data includes daytime map data and nighttime map data. The daytime map data includes the daytime texture data as the texture data and the daytime sky display data as the sky display data, and the nighttime map data includes the nighttime texture data and the sky display data as the texture data. Including data for displaying the night sky. Thus, a daytime three-dimensional map can be generated by using daytime map data. Further, a night three-dimensional map can be generated by using the night map data.

  In addition, as a difference between the texture data for daytime and the texture data for nighttime, for example, the texture data for nighttime is a pattern related to lighting such as indoor lighting and a neon sign of a signboard with respect to polygon data indicating a three-dimensional object of a facility. It is for attaching. Thereby, it can be brought close to the actual scenery that seems to be at night. As described above, the holder of the mobile phone device 300 can specify the building by turning on the neon light of the sign as a pattern related to lighting.

  In addition, the day sky display data varies the position of the sun according to the current date and time, and the night sky display data includes the position of the moon and the constellation according to the current date and time, And different constellation types. By doing in this way, the holder of the mobile phone device 300 can grasp the exact sun position according to the current date and time.

  Further, the night sky display data indicates the degree of air contamination in a predetermined area. For example, in the city center, the air is dirty. Thereby, the night sky with higher accuracy can be displayed on the three-dimensional map.

  The display unit 40 is configured by, for example, a liquid crystal display, and the vehicle generated by the vehicle position mark corresponding to the current position of the vehicle on the screen of the display unit 40 and the map data input from the digital road map database 20. A surrounding 3D map can be displayed. When the final destination or the vehicle destination is set, a guide route or a vehicle guide route from the current position to the final destination or the vehicle destination is displayed on the road map in an overlapping manner.

  The operation switch group 50 includes, for example, a touch panel switch integrated with the display unit 40 or a mechanical switch provided around the display unit 40, and is used for various inputs.

  The voice output unit 60 includes a speaker or the like, and outputs a guidance voice when route guidance or vehicular route guidance is performed, or outputs guidance related to an input voice at the time of voice recognition. The voice input unit 70 includes a microphone and the like. The computer 30 performs a process for recognizing the input voice, and executes various controls based on the recognition result. The storage device 80 stores a pedestrian guide route to be described later.

  The communication device 90 is, for example, a Bluetooth (registered trademark, the following is omitted) communication device, and transmits a pedestrian guide route and map data related to the pedestrian guide route to the mobile phone device 300 in accordance with a known Bluetooth protocol. To do. The above-described Bluetooth protocol is a type of wireless communication protocol, and performs communication at a data transfer rate of 1 Mbps using radio waves in a band of 2.45 GHz. At that time, if the distance between the devices is within 10 m, communication is possible even if there is an obstacle.

  Further, when the position of the final destination is input by the operation switch group 50 or voice recognition, the in-vehicle navigation device 100 of the present embodiment, when a parking lot is provided at the final destination, from the current position to the final destination. Search and display the guide route to the ground. If no parking lot is provided at the final destination, a parking lot is searched around the final destination, the searched parking lot is set as a vehicle destination, and the vehicle destination is determined from the current position. It also has a so-called route guidance function that searches and displays the optimum vehicle guidance route up to. In addition, a pedestrian guide route search function for searching for an optimal pedestrian guide route from the vehicle destination to the final destination is also provided. As a method for setting such an optimum guide route, a known method such as the Dijkstra method is known. In addition, a search function for searching for a location of a facility or the like based on, for example, an address, a facility name, a telephone number, or the like input by the holder of the mobile phone device 300 is also provided.

  These functions are executed mainly by the computer 30 performing various arithmetic processes. That is, when the final destination or the vehicle destination is set, the computer 30 calculates the guide route or the vehicle guide route using the map data of the digital road map database 20, and displays the guide route or the vehicle guide route. . In addition, the computer 30 displays the own vehicle position mark indicating the position of the vehicle and the surrounding road map on the display unit 40, or changes the scale of the road map.

  Next, a schematic configuration of the mobile phone device 300 will be described with reference to FIG. The computer 220 includes a well-known CPU, ROM, RAM, I / O, and a bus line for connecting these components. In the ROM, a program to be executed by the computer 220 is written, and a CPU or the like executes predetermined arithmetic processing according to this program.

  The display screen 210 is constituted by, for example, a liquid crystal display, and is displayed around a current position generated by a current position mark corresponding to the current position of the mobile phone device 300 and map data input by the first storage unit 230 described later. A three-dimensional map can be displayed. In addition, when the pedestrian guide route transmitted from the in-vehicle navigation device 100 is stored in the third storage unit 245 described later, on the three-dimensional map, from the pedestrian departure place to the final destination. Pedestrian guidance routes are displayed in an overlapping manner.

  The GPS receiver 211 is a global positioning system (GPS) that measures the position of the mobile phone device 300 based on radio waves from a satellite. In the present embodiment, the position of the central portion G of the display screen 210 in the mobile phone device 300 is measured.

  The geomagnetic sensor 212 is for detecting the direction in which the holder of the mobile phone device 300 views the display screen 210 as the orientation of the mobile phone device 300 based on the geomagnetism. In the present embodiment, as shown in FIG. 7, the azimuth direction detected by the geomagnetic sensor 212 is such that the central portion G of the display screen 210 is leftward with respect to the true east E with reference to the east-west direction (X axis). Is represented by the azimuth angle data α indicating how many times it is directed to. In FIG. 7, E ′, W ′, S ′, N ′, T ′, and D ′ represent east, west, south, north, up, and down directions with a virtual viewpoint position E described later as the origin. ing. As an example of the azimuth angle data α, α = 60 ° when it is 60 ° to the left, and α = −45 ° when it is 45 ° to the right.

  The tilt angle sensor 213 is, for example, a liquid-filled capacitive tilt angle sensor. Specifically, a change in electrostatic capacitance accompanying the tilt of the liquid sealed in the tilt angle sensor 213 is detected as the tilt angle. In the present embodiment, as shown in FIG. 8, the tilt angle detected by the tilt angle sensor 213 is set so that the display screen 210 is oriented in the east-west direction (X (Axis) and a horizontal plane (XY plane) consisting of the north-south direction (Y-axis) as a reference, it is represented by tilt angle data γ indicating how many times it is tilted upward with respect to the directly upward direction T ′. As an example of the tilt angle data γ, when tilted upward by 30 °, γ = 30 °.

  The first storage unit 230 stores map data related to the pedestrian guide route transmitted from the in-vehicle navigation device 100 and received by the communication device 270 described later.

  The second storage unit 240 stores a first virtual view representing a virtual viewing distance from the virtual viewpoint position E representing the virtual viewpoint position of the holder of the mobile phone device 300 to the central portion G of the display screen 210. A second virtual viewing distance L2 representing a virtual viewing distance from a distance L1, a virtual viewpoint position E to a virtual viewing target M passing through the central portion G of the display screen 210, and the display screen 210 The horizontal length W and the vertical length H of the display screen 210 are stored.

  The third storage unit 245 stores a pedestrian guide route transmitted from the in-vehicle navigation device 100 and received by the communication device 270 described later.

  The operation unit 250 includes, for example, a mechanical switch and is used for various inputs. The voice output unit 260 includes a speaker or the like, and outputs a guidance voice when pedestrian route guidance is performed. The communication device 270 is, for example, a Bluetooth communication device, similar to the communication device 90 of the in-vehicle navigation device 100, and a pedestrian guide route and a pedestrian guide transmitted from the in-vehicle navigation device 100 in accordance with a well-known Bluetooth protocol. Receive map data about the route.

  Next, route guidance processing of the in-vehicle navigation device 100 according to the present embodiment will be described in detail using the flowcharts of FIGS. 3 and 4. FIG. 3 is a flowchart showing a main routine of route guidance processing of the in-vehicle navigation device 100, and FIG. 4 is a flowchart showing a routine of guidance route search processing.

  First, in step S10 of FIG. 3, the current position of the vehicle is detected. At this time, the position data by the GPS receiver 11 is acquired in the same form as the coordinate data (latitude, longitude, and altitude) of the road data described above. In addition, the geomagnetic sensor 12, the steering sensor 13, and the vehicle speed sensor 14 acquire data related to the traveling direction and travel distance of the host vehicle, and calculate the coordinate data of the current position based on the vehicle position calculated or determined in the past. (Coordinate data calculation by self-contained navigation) The current position is basically obtained based on coordinate data calculated by self-contained navigation. However, when the position data by the GPS receiver 11 is acquired, the two are compared, and when the difference is equal to or greater than a predetermined distance, the position data by the GPS receiver 11 is adopted as the current position.

  In step S20, map data of a surrounding map including the current position of the vehicle is read from the digital road map database 20, and a three-dimensional map is displayed on the display unit 40. In step S30, it is determined whether or not a final destination is set. Specifically, for example, a menu screen is displayed on the display unit 40, and it is determined whether or not the “final destination setting menu” item on the menu screen is selected via the operation switch group 50. If it is determined that the “final destination setting menu” item has not been selected, the process returns to step S10. On the other hand, if it is determined that the “final destination setting menu” item has been selected, the process proceeds to step S40.

  In step S40, the final destination is set. Specifically, for example, a final destination setting menu is displayed on the display unit 40. The final destination setting menu includes “search by name”, “search by genre”, “search by phone number”, and the like. The holder of the mobile phone device 300 selects one of the final destination setting menus via the operation switch group 50, and inputs a search condition corresponding to the selected menu. For example, when the holder of the mobile phone device 300 selects “Search by phone number”, the phone number “000-123-4567” of the facility desired by the holder of the mobile phone device 300 is input as a search condition. The computer 30 searches for facility data having a telephone number that matches the input telephone number “000-123-4567”. The facility corresponding to the retrieved facility data is set as the final destination. In step S50, a guidance route search process is executed. This route search process will be described with reference to the flowchart of FIG.

  In the flowchart of FIG. 4, first, in step S210, it is determined whether or not there is a parking lot at the final destination set in step S50. Specifically, for example, it is determined whether or not the parking lot flag in the facility data corresponding to the final destination set in step S50 is set to “1”. When it is determined that the parking lot flag is set to “1”, the process proceeds to step S220.

  In step S220, unless otherwise specified, the current position detected in step S10 is set as the departure point, and a guide route to the final destination set in step S40 is searched by a technique such as the Dijkstra method.

  If it is determined in step S210 that the parking lot flag is not set to “1”, that is, if it is determined that the parking lot flag is set to “0”, the process proceeds to step S230. In step S230, a parking lot around the final destination set in step S40 is searched. Specifically, for example, the facility data corresponding to the facility type “parking lot” that is estimated to have the shortest straight line distance from the final destination set in step S40 to the facility position is searched. In step S235, the parking lot searched in step S220 is set as the vehicle destination.

  In step S240, unless otherwise specified, the current position detected in step S10 is set as the departure point, and a vehicle guide route to the vehicle destination set in step S235 is searched by a technique such as the Dijkstra method. . In step S250, the parking lot searched in step S230 is used as a departure place, and a pedestrian guide route to the final destination set in step S40 is searched by a technique such as the Dijkstra method.

  In step S260, the pedestrian guide route searched in step S250 is stored in the storage device 80.

  Returning to the flowchart of FIG. 3, in step S60, it is determined whether or not a pedestrian guidance route has been searched in step S250. When it is determined that the pedestrian guidance route has not been searched, the process proceeds to step S70. In step S70, the guide route searched in step S220 is displayed. Specifically, the computer 30 highlights the searched guidance route on the road and displays it on the display unit 40.

  In step S80, route guidance is performed based on the guidance route searched in step S220. In step S90, it is determined whether or not the current position detected in step S10 has arrived at the final destination set in step S40. If it is determined that it has not arrived, the process returns to step S80. On the other hand, if it is determined that it has arrived, the process is terminated.

  If it is determined in step S60 that a pedestrian guidance route has been searched, the process proceeds to step S100. In step S100, the vehicle guidance route searched in step S240 is displayed. Specifically, the computer 30 highlights the searched vehicle guide route on the road and displays it on the display unit 40.

  In step S110, vehicle route guidance is performed based on the vehicle guidance route searched in step S240. In step S120, it is determined whether or not the current position detected in step S10 has arrived at the vehicle destination set in step S235. If it is determined that it has not arrived, the process returns to step S110. On the other hand, if it is determined that it has arrived, the process proceeds to step S125.

  In step S125, the computer 30 extracts the pedestrian guide route from the storage device 80. The communication device 90 transmits the extracted pedestrian guide route to the mobile phone device 300.

  In step S130, it is determined whether it is daytime according to the current time indicated by an internal clock (not shown) provided in the computer 30. When it is determined that it is daytime, the process proceeds to step S140. In step S140, the computer 30 extracts daytime map data related to the guide route for pedestrians searched in step S250 from the digital road map database 20. The communication device 90 transmits the daytime map data regarding the extracted pedestrian guidance route to the mobile phone device 300.

  If it is determined in step S130 that it is not daytime, the process proceeds to step S150. In step S150, the computer 30 extracts night map data related to the guide route for pedestrians searched in step S250 from the digital road map database 20. The communication device 90 transmits night map data regarding the extracted pedestrian guidance route to the mobile phone device 300.

  Next, route guidance processing of the cellular phone device 300 in the present embodiment will be described in detail with reference to the flowcharts of FIGS. 5 is a flowchart showing a main routine of route guidance processing of the mobile phone device 300, and FIG. 6 is a flowchart showing a routine of virtual visual field range calculation processing. As a specific example, the description will be made assuming that the holder of the mobile phone device 300 is looking directly at the central portion G of the display screen 210.

  First, in step S310 of FIG. 5, it is determined whether or not the communication unit 270 has received the pedestrian guide route and the map data related to the pedestrian guide route from the in-vehicle navigation device 100. When it is determined that the communication unit 270 has not received, the communication unit 270 is in a standby state. On the other hand, when it determines with the communication part 270 having received, it progresses to step S315.

  In step S312, the communication unit 270 inputs the received pedestrian route to the computer 220, and the computer 220 stores the input pedestrian guide route in the third storage unit 245.

  In step S315, the communication unit 270 inputs the received map data regarding the pedestrian route to the computer 220, and the computer 220 causes the first storage unit 230 to store the input map data regarding the pedestrian route. By doing in this way, the pedestrian guidance route and the map data regarding the pedestrian guidance route can be received and stored from the in-vehicle navigation device 100.

  In step S320, a virtual visual field range calculation process is executed. This virtual visual field range calculation process will be described with reference to the flowchart of FIG.

  In the flowchart of FIG. 6, first, in step S410, the current position of the central portion G of the display screen 210 is detected. Specifically, for example, the position data by the GPS receiver 211 is acquired in the same form as the coordinate data (latitude, longitude, and altitude) of the road data described above. In the present embodiment, the current position of the central portion G of the display screen 210 is represented by G = (xg, yg, zg).

  In step S <b> 420, the direction in which the holder of mobile phone device 300 views display screen 210 is detected as the orientation of mobile phone device 300. Specifically, for example, based on the geomagnetism detected by the geomagnetic sensor 212, the azimuth angle data α indicating how many times the central portion G of the display screen 210 is directed leftward with respect to the true east E is calculated. Is done.

  In step S430, the tilt angle of display screen 210 is detected. Specifically, for example, a signal indicating the tilt angle data γ output by the tilt angle sensor 213 is output.

  In step S440, a virtual gaze direction representing a virtual gaze direction is calculated. Specifically, for example, since the holder of the mobile phone device 300 is viewing the central portion G of the display screen 210 from the front, the virtual line-of-sight direction is perpendicular to the central portion of the display screen 210. . Therefore, the depression / elevation angle data β in the virtual visual line direction is calculated by the following equation.

(Equation 1) β = γ−90 °
As shown in the example of FIG. 9, the straight line X is calculated as the virtual visual line direction based on the depression / elevation angle data β calculated by (Equation 1).

  In step S450, the computer 220 reads a predetermined first virtual visual distance L1 from the second storage unit 240. In step S460, based on the azimuth angle data α calculated in step S420, the straight line X indicating the virtual visual line direction calculated in step S440, and the first virtual visual distance L1 extracted in step S450, A virtual viewpoint position E = (xe, ye, ze) is calculated. Specifically, for example, starting from the current position G = (xg, yg, zg) of the central portion G of the display screen 210 detected in step S420, toward the opposite side of the orientation of the mobile phone device 300, The straight line X is extended by the first virtual viewing distance L1, and the end point of the straight line X is calculated as the virtual viewpoint position E = (xe, ye, ze). The coordinate data of the virtual viewpoint position E is represented in the same form as the coordinate data (latitude, longitude, and altitude) of the road data described above.

  In step S <b> 470, the computer 220 reads the second virtual viewing distance L <b> 2, the horizontal length W and the vertical length H on the display screen 210, which are determined in advance from the second storage unit 240.

  In step S480, a virtual visual field range is calculated. Specifically, for example, four points indicating four corners on the display screen 210 are represented as A, B, C, and D. The coordinate data of the four points A, B, C, and D are the center portion G = (xg, yg, zg) of the display screen, the azimuth angle data α, the tilt angle data γ, and the horizontal length W of the display screen 210. It is calculated based on the vertical length H. The coordinate data of the four points A, B, C, and D are represented in the same form as the coordinate data (latitude, longitude, and altitude) of the road data described above.

  Next, a straight line passing through the point A on the display screen 210 (hereinafter referred to as a straight line a) is calculated from the virtual viewpoint position E as a starting point. Similarly, each straight line passing through the other three points B, C, and D on the display screen 210 (hereinafter referred to as a straight line b, a straight line c, and a straight line d) is calculated from the virtual viewpoint position E as a starting point.

  Then, on the straight line a, the coordinate data of the point I at which the ratio between the line segment EA and the line segment EI is the same as the ratio between the first virtual visual distance L1 and the second virtual visual distance L2 is calculated. . Similarly, coordinate data of points J, K, and L on the straight lines b, c, and d are calculated. The coordinate data of the four points I, J, K, and L are represented in the same form as the coordinate data (latitude, longitude, and altitude) of the road data described above. For example, as shown in the example of FIG. 10, a plane connecting these calculated four points I, J, K, and L is calculated as the virtual visual field range. In this way, the virtual visual field range can be calculated.

  Returning to the flowchart of FIG. 5, in step S330, the map data of the surrounding map including the current position of the central portion G of the display screen 210 is read from the first storage unit 230, and the virtual visual field range calculated in step S480 is obtained. A three-dimensional map corresponding to is displayed on the display screen 210. Specifically, for example, 3D map data including the current position of the central portion G of the display screen 210 is read from the first storage unit 230, and polygon data corresponding to the 3D map data is displayed. The displayed polygon data is subjected to texture mapping using texture data corresponding to the polygon data, thereby providing a pattern on the polygon surface. Specifically, as shown in the example of FIG. 14, a three-dimensional map corresponding to a plane connecting the four points I, J, K, and L indicating the virtual visual field range calculated in step S480 is displayed on the display screen 210. Is displayed. In the example of FIG. 14, a daytime three-dimensional map corresponding to the virtual visual field range is displayed on the display screen 210.

  In step S340, the computer 220 extracts a pedestrian guide route from the third storage unit 245. The extracted pedestrian guidance route is displayed. Specifically, the computer 220 highlights the extracted pedestrian guidance route so as to overlap the road, and displays it on the display screen 210.

  In step S350, pedestrian route guidance is performed based on the pedestrian guidance route extracted in step S340. In step S360, it is determined whether or not the current position detected in step S410 has arrived at the final destination set in step S40. If it is determined that it has not arrived, the process returns to step S320. On the other hand, if it is determined that it has arrived, the process is terminated.

(Modification)
For example, in the above-described first embodiment, when a pedestrian guide route is searched, the mobile phone device 300 is informed of the pedestrian guide route and the relevant route after the vehicle has reached the vehicle destination. The example in which the communication device 90 transmits map data related to the pedestrian guidance route has been described. However, the communicator 90 may transmit the pedestrian guide route and map data related to the pedestrian guide route to the mobile phone device 300 when the pedestrian guide route is searched.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. The map display device for a portable device according to the present embodiment has substantially the same configuration as the mobile phone device 300 and the in-vehicle navigation device 100 according to the first embodiment described above. Therefore, the description regarding the same configuration is omitted.

  The computer 220 in the mobile phone device 300 according to the second embodiment has a map data acquisition function for acquiring map data corresponding to an area desired by the holder of the mobile phone device 300 from the in-vehicle navigation device 100. When the position of the pedestrian destination is input by the operation unit 250 based on the acquired map data, a pedestrian guide route from the current position to the pedestrian destination is searched and displayed. A so-called pedestrian route guidance function is also provided. As a method for setting such an optimum guide route, a known method such as the Dijkstra method is known. In addition, a search function for searching for a location of a facility or the like based on, for example, an address, a facility name, a telephone number, or the like input by the holder of the mobile phone device 300 is also provided.

  Thus, unlike the first embodiment, the mobile phone device 300 according to the second embodiment searches for a pedestrian guide route, and the pedestrian is based on the searched pedestrian guide route. Route guidance can be performed.

  Next, processing executed in the mobile phone device 300 and the vehicle-mounted navigation device 100 will be described using the flowcharts of FIGS. 11 and 12. Each step described on the left side of FIG. 11 and FIG. 12 shows processing executed in the mobile phone device 300 which is a map display device for portable devices, and each step described on the right side of FIG. The process performed in is shown. In addition, specific description is abbreviate | omitted regarding the step similar to the step in each flowchart of 1st Embodiment.

  First, in step S510 of FIG. 11, it is determined whether or not map data is acquired from the in-vehicle navigation device 100. Specifically, for example, a menu screen is displayed on the display screen 210, and it is determined whether or not the “map data acquisition menu” item on the menu screen is selected via the operation unit 250. If it is determined that the “map data acquisition menu” item has not been selected, the process ends. On the other hand, if it is determined that the “map data acquisition menu” item has been selected, the process proceeds to step S520.

  In step S520, for example, an area selection screen 710 as shown in FIG. 13 is displayed. On this area selection screen 710, a desired area of the holder of the mobile phone device 300 is selected via the operation unit 250.

  In step S530, for example, in the area selection screen 710, the “Nakagawa-ku, Nagoya-shi” item is selected via the operation unit 250, and the “transmission” item is selected. In response, “Nakagawa Ward, Nagoya City” selected by the holder of the mobile phone device 300 is transmitted.

  In step S540, the communication device 90 in the in-vehicle navigation device 100 receives the desired area transmitted in step S530. The communication device 90 inputs the received desired area to the computer 30. In step S550, it is determined whether the current time is daytime. If it is determined that it is daytime, the process proceeds to step S560. In step S 560, daytime map data corresponding to a desired area input to the computer 30 is extracted from the digital road map database 20.

  If it is determined in step S550 that it is not daytime, the process proceeds to step S570. In step S <b> 570, night map data corresponding to a desired area input to the computer 30 is extracted from the digital road map database 20.

  In step S580, the communication device 90 transmits the map data corresponding to the desired area extracted in step S560 or step S570 to the map display device 300 for portable device.

  In step S590, the communication unit 270 receives the map data corresponding to the desired area of the holder of the mobile phone device 300 transmitted from the in-vehicle navigation device 100. In step S600, the map data received by the communication unit 270 is input to the computer 220, and the computer 220 stores the input map data in the first storage unit 230. Thus, the mobile phone device 300 can receive the map data related to the three-dimensional map from the in-vehicle navigation device 100 and store the received map data. Moreover, by doing in this way, the map data applicable to the desired area of the holder | retainer of the mobile telephone apparatus 300 is acquirable.

  In step S610, a virtual visual field range calculation process is executed. Since this virtual visual field range calculation process is the same process as step S320 in the first embodiment, a description thereof will be omitted. In step S620, map data of the surrounding map including the current position of the central portion G of the display screen 210 is read from the first storage unit 230, and, as shown in the example of FIG. 15, according to the calculated virtual visual field range. The three-dimensional map is displayed on the display screen 210. In the example of FIG. 15, the nighttime three-dimensional map corresponding to the virtual visual field range is displayed on the display screen 210.

  In step S630, it is determined whether route guidance for pedestrians is being performed. If it is determined that the route guidance for pedestrians is not being performed, the process proceeds to step S640. In step S640, it is determined whether a pedestrian destination is set. Specifically, for example, a menu screen is displayed on the display screen 210, and it is determined whether or not the “pedestrian destination setting menu” item on the menu screen is selected via the operation unit 250. If it is determined that the “pedestrian destination setting menu” item has not been selected, the process returns to step S610. On the other hand, when it is determined that the “pedestrian destination setting menu” item is selected, the process proceeds to step S650.

  In step S650, a pedestrian destination is set. Specifically, for example, a pedestrian destination setting menu is displayed on the display screen 210. The final destination setting menu includes “search by name”, “search by genre”, “search by phone number”, and the like. The holder of the mobile phone device 300 selects one of the final destination setting menus via the operation unit 250 and inputs a search condition corresponding to the selected menu. As an example, when the holder of the mobile phone device 300 selects “Search by name”, the name “Toda Elementary School” of the facility desired by the holder of the portable device is input as a search condition, and the computer 220 is input Search for facility data with a name that matches the name “Toda Elementary School”. A facility corresponding to the retrieved facility data is set as a pedestrian destination.

  In step S660, unless otherwise specified, a pedestrian to the pedestrian destination set in step S650, starting from the current position of the central portion G of the display screen 210 detected in the virtual visual field range calculation process. The guide route is searched using a method such as the Dijkstra method. Thus, the mobile phone device 300 can search for a pedestrian guide route.

  In step S670, pedestrian route guidance is performed based on the pedestrian guidance route searched in step S660. Thereby, the route guidance for pedestrians can be performed with respect to the holder of a portable device.

  In step S690, it is determined whether the current position of the central portion G of the display screen 210 detected in the virtual visual field range calculation process has arrived at the pedestrian destination set in step S650. If it is determined that it has not arrived, the process returns to step S610. On the other hand, if it is determined that it has arrived, the process is terminated.

  As described above, according to each embodiment, the computer 220 holds the mobile phone device 300 based on the current position of the mobile phone device 300, the tilt angle of the display screen 210, and the orientation of the mobile phone device 300. Calculates a virtual visual field range that is assumed to be visually recognized behind the display screen 210. The calculated virtual visual field range can be displayed on the display screen 210 so as to correspond to a landscape when viewed from the line-of-sight position of the holder of the mobile phone device 300. As a result, the scenery that is actually visible to the holder of the mobile phone device 300 can be displayed on the display screen 210 as a three-dimensional map.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, in each embodiment described above, an example in which the virtual visual field range is calculated based on the first virtual visual distance L1 and the second virtual visual distance L2 stored in the second storage unit 240. explained. However, the actual viewing distance representing the actual viewing distance to the display screen 210 is calculated, and based on the calculated actual viewing distance and the second virtual viewing distance L2 stored in the second storage unit 240. The virtual visual field range may be calculated.

  Specifically, for example, an ultrasonic sensor (not shown) is provided in the mobile phone device 300. The ultrasonic sensor irradiates the holder of the mobile phone device 300 with millimeter-wave radio waves and measures the distance from the reflected wave to the mobile phone device 300. The distance measured by this ultrasonic sensor is taken as the actual viewing distance. The four points A, B, C, and D indicating the four corners of the display screen are respectively passed from the virtual viewpoint position E, which is the ratio of the actual visual distance detected by the ultrasonic sensor and the second virtual visual distance L2. Four points I, J, K, and L on the straight lines a, b, c, and d are calculated. Then, a plane connecting the calculated four points I, J, K, and L is calculated as a virtual visual field range.

  Then, the virtual visual field range can be calculated so that the virtual visual field range becomes larger as the actual viewing distance measured by the ultrasonic sensor becomes shorter. Thereby, the virtual visual field range with higher accuracy can be calculated.

  Moreover, in each embodiment mentioned above, the example which superimposes and displays the pedestrian guidance route on the road data applicable to the said pedestrian guidance route on the display screen 210 was demonstrated. However, the display range including the traveling direction in the pedestrian guidance route may be brightened. Specifically, for example, the display screen 210 can change the contrast, and the contrast is changed in accordance with a contrast change signal from the computer 220. Therefore, a contrast change signal for increasing the contrast of the display range including the traveling direction is output from the computer 220 to the display screen 210. As a result, the contrast of the display range including the traveling direction in the pedestrian guidance route can be increased. Thereby, the holder of the mobile phone device 300 can clearly grasp the traveling direction in the pedestrian guide route.

  Further, for example, on the display screen 210, only a three-dimensional object along the pedestrian guidance route may be displayed. By doing so, the holder of the mobile phone device 300 can clearly grasp the traveling direction in the pedestrian guide route.

  Furthermore, in each of the above-described embodiments, the case where the holder of the mobile phone device 300 stops and looks at the three-dimensional map corresponding to the virtual visual field range has been described in consideration of safety. However, it is conceivable that the holder of the mobile phone device 300 sees a three-dimensional map corresponding to the virtual visual field range while walking. In this case, based on the change in the current position of the display screen 210, it is determined whether or not the holder of the mobile phone device 300 is walking, and it is determined that the holder of the mobile phone device 300 is walking. In this case, the display of the 3D map is stopped on the display screen. As a result, when the holder of the mobile phone device 300 tries to view a three-dimensional map corresponding to the virtual visual field range while walking, the three-dimensional map is not displayed on the display screen 210.

  Moreover, in each embodiment mentioned above, when the holder of the mobile phone device 300 tilts the display screen 210 until it is level with the ground, the display screen 210 displays a map in which the three-dimensional map is looked down vertically. Explained. However, when map data for displaying a two-dimensional map is stored in a fourth storage unit (not shown) and the holder of the mobile phone device 300 tilts the display screen 210 until it is level with the ground. The map data may be extracted from the fourth storage unit, and a two-dimensional map may be displayed on the display screen 210 based on the extracted map data.

It is a block diagram which shows schematic structure of the mobile telephone apparatus 300 by this embodiment. It is a block diagram which shows schematic structure of the vehicle-mounted navigation apparatus 100 by this embodiment. It is a flowchart which shows the main routine of the route guidance process of the vehicle-mounted navigation apparatus 100 in this embodiment. It is a flowchart which shows the routine of the guidance route search process in this embodiment. 5 is a flowchart showing a main routine of route guidance processing of the mobile phone device 300 in the present embodiment. It is a flowchart which shows the routine of the virtual visual field range calculation process in this embodiment. It is explanatory drawing for demonstrating the azimuth angle data (alpha) of the display screen 210 in this embodiment. It is explanatory drawing for demonstrating the inclination-angle data (gamma) of the display screen 210 in this embodiment. It is explanatory drawing for demonstrating the virtual gaze direction in this embodiment. It is explanatory drawing for demonstrating the virtual visual field range in this embodiment. It is a flowchart which shows the first half part of the control processing performed in the map display apparatus 300 for portable devices and the vehicle-mounted navigation apparatus 100 in this embodiment. It is a flowchart which shows the latter half part of the control processing performed in the map display apparatus 300 for portable devices and the vehicle-mounted navigation apparatus 100 in this embodiment. It is an image figure which shows the example of a display of the area selection screen 710 in this embodiment. It is an image figure which shows the example of a display of the three-dimensional map for daytime according to the virtual visual field range in this embodiment. It is an image figure which shows the example of a display of the night three-dimensional map according to the virtual visual field range in this embodiment. It is an image figure which shows the example of a display which brightened the contrast of the display range containing the advancing direction in the guide route for pedestrians in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Position detector 11 ... GPS receiver 12 ... Geomagnetic sensor 13 ... Steering sensor 14 ... Vehicle speed sensor 20 ... Digital road map database 21 ... Information recording medium 30 ... Computer 40 ... Display part 50 ... Operation switch group 60 ... Sound output part 70 ... voice input unit 80 ... storage device 90 ... communication device 210 ... display screen 211 ... GPS receiver 212 ... geomagnetic sensor 213 ... tilt angle sensor 220 ... computer 230 ... first storage unit 240 ... second storage unit 245 ... Third storage unit 250 ... operation unit 260 ... audio output unit 270 ... communication unit

Claims (15)

A map display system for portable devices comprising an in-vehicle navigation device and a map display device for portable devices,
The in-vehicle navigation device is
Map data storage means for storing map data relating to a three-dimensional map;
A navigation transmission means for transmitting the map data to the map display device for portable devices,
The portable device map display device is applied to a portable device having a display screen, and displays a three-dimensional map on the display screen .
Portable data map data storage means for storing map data for displaying a three-dimensional map;
Current position detecting means for detecting the current position of the portable device;
An inclination angle detecting means for detecting an inclination angle of the display screen of the portable device;
Orientation detecting means for detecting a direction in which the holder of the portable device views the display screen as the orientation of the portable device;
Based on the current position of the portable device, the tilt angle of the display screen, and the orientation of the portable device, a calculating means for calculating a visual field range that is assumed to be viewed by the holder of the portable device behind the display screen;
A three-dimensional map corresponding to the field of view calculated by the calculation means is displayed on the display screen based on the map data so as to correspond to a landscape when viewed from the line of sight of the holder of the portable device. Map display control means ;
Receiving means for portable devices that receive the map data transmitted from the in-vehicle navigation device ,
The portable device map data storage means stores the received map data,
further,
Determining means for determining whether or not the holder of the portable device is walking based on a change in the current position of the portable device;
Instructing means for instructing the map display control means to stop displaying the three-dimensional map when the determination means determines that the holder of the portable device is walking. Map display system for portable devices. The portable device map data storage means has map data for displaying a two-dimensional map,
When the holder of the portable device tilts the display screen until it is level with the ground, the map display control means displays a two-dimensional map based on the current position of the portable device on the display screen. The map display system for portable devices according to claim 1. A distance measuring means for measuring a distance between the holder of the portable device and the portable device;
The portable device according to claim 1, wherein the calculation unit calculates the visual field range such that the visual field range becomes larger as the distance measured by the distance measurement unit becomes shorter. Map display system . The in-vehicle navigation device is
Comprising navigation receiving means for receiving area data indicating a desired area to which map data should be transmitted from the map display device for portable devices,
The navigation transmission means transmits map data corresponding to the desired area when the navigation reception means receives the area data.
The map display device for portable devices is:
Selection means for selecting a desired area by the holder of the portable device;
A portable device transmitting means for transmitting area data indicating the selected desired area to the in-vehicle navigation device;
The map display system for a portable device according to claim 1 , wherein the portable device receiving means receives map data corresponding to the desired area from the navigation transmitting means. The map data includes facility data regarding facilities on the map data,
Pedestrian destination setting means for setting a pedestrian destination based on the facility data;
On the basis of the map data, according to claim 4 from the pedestrian departure, characterized in that it comprises a portable device for pedestrian guidance route search means for searching the pedestrian guidance route to the pedestrian destination The map display system for portable devices described in 1. The in-vehicle navigation device is
The map data storage means stores facility data relating to facilities on the map data,
A final destination setting means for setting a final destination based on the facility data;
When there is no parking lot at the facility corresponding to the set final destination, a parking lot search means for searching for a parking lot around the final destination,
Vehicle destination setting means for setting the searched parking lot as a vehicle destination;
Vehicle guide route search means for searching for a vehicle guide route from the departure place to the vehicle destination;
A pedestrian guidance route search means for searching for a pedestrian guidance route from the vehicle destination to the final destination,
The navigation transmitting means transmits the pedestrian guide route and map data related to the pedestrian guide route to the portable device map display device,
The portable device receiving means receives the pedestrian guide route transmitted from the in-vehicle navigation device and map data related to the pedestrian guide route,
The portable device map data storage means stores map data relating to the received pedestrian guide route,
The portable device map display device further includes:
The map display system for a portable device according to claim 1 , further comprising a pedestrian guide route storage unit that stores the received pedestrian guide route. The map data includes polygon data obtained by forming a three-dimensional object on the three-dimensional map with polygons, and a pattern on a polygon surface for the polygon data to bring the three-dimensional object closer to an actual landscape. and texture data is data, the map display system for a portable device according to any one of claims 1 to 6, characterized in that it comprises an empty display data is data for displaying the three-dimensional map empty . In the in-vehicle navigation device,
The map data storage means stores daytime map data and nighttime map data as the map data,
The navigation transmission means transmits either the daytime map data or the nighttime map data to the portable device map display device according to the current time,
8. The portable device map display according to claim 7 , wherein the portable device receiving means receives either the daytime map data or the nighttime map data transmitted from the in-vehicle navigation device. system. The daytime map data includes daytime texture data as the texture data and daytime sky display data as the sky display data.
The map display system for a portable device according to claim 8 , wherein the night map data includes night texture data as the texture data and night sky display data as the sky display data. 10. The map display system for a portable device according to claim 9 , wherein the nighttime texture data is for attaching a pattern relating to lighting. The daytime sky display data, depending on the current date and time, the sun position is different,
Data for the night sky display, depending on the current date and time, for the moon and the position of the constellation, and the portable device according to claim 9 or claim 10, characterized in that to vary the types of constellations Map display system. 12. The map display system for a portable device according to claim 11 , wherein the night sky display data indicates a degree of air pollution in a predetermined area. The portable device for map display device, based on the searched pedestrian guidance route, the claims 5 to 12, characterized in that it comprises a pedestrian route guidance means for pedestrian route guidance A map display system for a portable device according to any one of the above. The display screen is configured to change the contrast,
The map display control means highlights the pedestrian guide route superimposed on road data corresponding to the pedestrian guide route, and brightens the contrast of the display range including the traveling direction in the pedestrian guide route. The map display system for a portable device according to claim 13 , wherein the map display system is changed. 15. The map display system for portable devices according to claim 14 , wherein the map display control means displays only the three-dimensional object along the pedestrian guide route.

Images