KR101765626B1

KR101765626B1 - Navigation device and driving method thereof

Info

Publication number: KR101765626B1
Application number: KR1020150177484A
Authority: KR
Inventors: 김장신
Original assignee: 현대자동차 주식회사
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2017-08-07
Also published as: KR20170069813A

Abstract

A navigation device of the present invention includes: a memory including road data; A vehicle position determining unit for determining a current position of the vehicle; A data transmitting and receiving unit transmitting feedback data including the current position to a database server and receiving estimated road data corresponding to the current position from the database server; And a control unit for providing the vehicle path using the estimated road data when the road data corresponding to the current position does not exist in the memory.

Description

TECHNICAL FIELD [0001] The present invention relates to a navigation device,

The present invention relates to a navigation apparatus and a driving method thereof.

The vehicle generally includes a navigation device for guiding the vehicle route. The navigation device may include road data in a storage device such as its own memory or a Secure Digital (SD) card. In addition, the navigation device can receive road data in real time from a remote server through long distance communication.

If there is no road data that matches the current position of the vehicle, the navigation device temporarily stops the vehicle guidance. At this time, the driver has to determine the vehicle route himself without assistance of the navigation device.

Therefore, there is a need for a navigation device capable of providing the driver with a vehicle route even when the road data does not exist or is not updated to the latest version.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a navigation apparatus and a driving method thereof that can provide a driver with a vehicle route even when the road data does not exist or is not updated to the latest version.

A navigation device according to an embodiment of the present invention includes: a memory including road data; A vehicle position determining unit for determining a current position of the vehicle; A data transmitting and receiving unit transmitting feedback data including the current position to a database server and receiving estimated road data corresponding to the current position from the database server; And a control unit for providing the vehicle path using the estimated road data when the road data corresponding to the current position does not exist in the memory.

Wherein the database server includes map data partitioned into a plurality of unit areas and counts the number of times of passage of the corresponding unit area based on the feedback data received from the vehicle passing through at least one of the plurality of unit areas, It is possible to generate the estimated road data by connecting the unit areas having the number of times of passage of each of the plurality of unit areas exceeding the predetermined threshold value.

Wherein the unit zone in which the count is greater than or equal to a first reference number belongs to a first group and the unit zone in which the count is less than the first reference number and is greater than the threshold value belongs to a second group, The zone may change the count to belong to the second group if there is no input of the feedback data during the reference period.

Wherein the unit zone in which the count is equal to or greater than a second reference number belongs to a first group of the first group and the unit zone in which the count is less than the first reference number and less than the second reference number, Group, and when the count is changed so that the unit zone belonging to the first_1 group belongs to the second group, the unit zone is estimated as a zone where the existing road is closed, Can be reduced to the first speed before the input of the feedback data.

If the count is changed such that the unit zone belonging to the first group is belonging to the second group, the unit zone is estimated as a road zone having a first road utilization frequency, May be reduced to the second speed before the input of the second speed.

Wherein the unit zone in which the count is maintained in the range of the second group is estimated to be a road zone having a second road frequency of use and a count of the unit zone is reduced to a third rate before input of the feedback data, The frequency of use of the two roads may be smaller than the frequency of use of the first road.

The first speed may be faster than the second speed, and the second speed may be faster than the third speed.

If there is no input of the feedback data in the unit area, the count of the unit area can be maintained without decreasing if the feedback data is input in the peripheral unit area.

If there is input of the feedback data in the unit area, the count of the unit area can be maintained without increasing the input of the feedback data in the peripheral unit area.

The control unit may use the road data or the estimated road data according to a driver's selection when the road data corresponding to the current position exists and the road data does not match the estimated road data.

A driving method of a navigation device according to an embodiment of the present invention includes: determining a current position of a vehicle; Transmitting feedback data including the current position to a database server; Attempting to receive road data from the memory; Receiving estimated road data corresponding to the current location from the database server; And providing the vehicle path using the estimated road data when the road data corresponding to the current position does not exist in the memory.

And using the road data or the estimated road data according to the driver's selection when the road data corresponding to the current position exists and the road data does not match the estimated road data.

A navigation display device according to an embodiment of the present invention includes: a memory including road data; A vehicle position determining unit for determining a current position of the vehicle; A data transmitting and receiving unit transmitting feedback data including the current position to a database server and receiving estimated road data corresponding to the current position from the database server; A control unit for providing a vehicle route using the estimated road data when the road data corresponding to the current position does not exist in the memory; And a display for displaying the vehicle path in a color corresponding to the number of times of passage.

Wherein the database server includes map data partitioned into a plurality of unit areas and counts the number of times of passage of the corresponding unit area based on the feedback data received from the vehicle passing through at least one of the plurality of unit areas, The display unit generates the estimated road data by connecting the unit areas having the number of times of passage of each of the plurality of unit areas exceeding the predetermined threshold value, and the display can display the unit area in the color corresponding to the number of times of passing.

Wherein the unit zone in which the count is greater than or equal to a first reference number belongs to a first group and the unit zone in which the count is less than the first reference number and is greater than the threshold value belongs to a second group, Wherein the count is changed so as to belong to the second group when there is no input of the feedback data during the reference period, and the display displays the unit zone belonging to the first group and the unit zone belonging to the second group It can be displayed in color.

Wherein the unit zone in which the count is equal to or greater than a second reference number belongs to a first group of the first group and the unit zone in which the count is less than the first reference number and less than the second reference number, Group, and when the count is changed so that the unit zone belonging to the first_1 group belongs to the second group, the unit zone is estimated as a zone where the existing road is closed, The display is reduced to a first speed before the input of the feedback data, and the display can display the unit area belonging to the first_1 group, the unit area belonging to the first_2 group and the unit area belonging to the second group with different colors .

According to the embodiment of the present invention, it is possible to provide a navigation apparatus and a driving method thereof that can provide a driver with a vehicle route even when the road data does not exist or is not updated to the latest version.

1 is a diagram illustrating a navigation device and a database server according to an embodiment of the present invention.
2A is a view for explaining estimated road data at a first time point according to an embodiment of the present invention.
FIG. 2B is a view for explaining estimated road data at a second time point according to an embodiment of the present invention.
2C is a view for explaining estimated road data at a third time point according to an embodiment of the present invention.
3 is a flowchart illustrating a method of driving a navigation device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a diagram illustrating a navigation device and a database server according to an embodiment of the present invention.

Referring to FIG. 1, a navigation device 10 and a database server 20 including a memory 100, a vehicle position determining unit 110, a data transmitting / receiving unit 120, and a controller 130 are illustrated.

The memory 100 includes road data. The memory 100 may be a conventional non-volatile or volatile memory device. The memory 100 may include a Secure Digital (SD) card. The road data may be stored in advance in the memory 100, or may be updated in real time in the memory 100 through a wireless network of a communication company or the like.

The vehicle position determination unit 110 determines the current position of the vehicle including the navigation device 10. [ The vehicle position determination unit 110 may use an existing vehicle position determination method. For example, the vehicle position determination unit 110 may use a GPS (Global Positioning System). The vehicle position determination unit 110 may determine the current position of the vehicle through the wireless network of the communication company. Alternatively, the vehicle position determining unit 110 may determine the current position of the vehicle through the road information providing apparatus installed on the road.

The data transmission / reception unit 120 receives the estimated road data from the database server 20. The data transmission / reception unit 120 may transmit the current position of the vehicle to the database server 20 as feedback data. The data transmission / reception unit 120 may be an existing wired / wireless communication means. The data transmitting and receiving unit 120 may communicate with the database server 20 through the wireless network of the communication company.

If the road data corresponding to the current position of the vehicle does not exist, the control unit 130 provides the vehicle path using the estimated road data corresponding to the current position of the vehicle. If the road data corresponding to the present position of the vehicle exists, the control unit 130 may provide the vehicle path according to the road data. However, if the road data corresponding to the current position of the vehicle does not exist, the control unit 130 may provide the vehicle path using the estimated road data corresponding to the current position of the vehicle.

The display can display the vehicle path in a color corresponding to the number of times passed. The display may be a vehicle display provided in the vehicle, a vehicle AVN system (Audio Video Navigation system), or a navigation device buried in the vehicle, for example, by a driver. For example, in the display, red is displayed for a vehicle route having the first rank number of times, yellow is displayed for the vehicle route having the second rank number of times, and blue is displayed for the vehicle route having the third rank ranking , The vehicle route whose number of times of passage is the fourth rank is displayed in an achromatic color such as gray or black, and the color may not be displayed for the vehicle route of the fifth rank or zero. Therefore, the driver can easily recognize and drive the vehicle route having a high frequency of passage.

Estimated road data of the database server 20 will be described below with reference to Figs. 2A to 2C. The second time point is the time point after the first time point, and the third time point is the time point after the second time point.

2A is a view for explaining estimated road data at a first time point according to an embodiment of the present invention.

Referring to FIG. 2A, map data 200 partitioned into a plurality of unit areas UA11, UA12, ... UA55 is shown. The database server 20 may include the map data 200. The database server 20 can count the number of transit times of the corresponding unit area based on the feedback data received from the data transmission / reception unit 120 of each vehicle. The database server 20 can generate the estimated road data by connecting the unit areas having the number of times of passage of each of the plurality of unit areas exceeding the predetermined threshold value. The database server 20 inputs the feedback data to increase the count of the unit area corresponding to the feedback data and to reduce the count of the unit area in which the feedback data is not received as input for a certain period of time.

For example, when the vehicle 210 is located in the unit area UA33 and transmits feedback data to the database server 20, the count of the unit area UA33 may increase from 63 to 64. The size at which the count increases may not necessarily be 1, but may vary depending on the condition. Also, when there is a traffic jam, the vehicle 210 can be located in the unit area UA33 for a long time, but the duplicate count can be prevented by using the unique ID of the vehicle 210. [ Also, the maximum value of the count may be limited to a specific value, for example, 64, and the input of more feedback data may not be counted.

The estimated road data ERD1, ERD2 and ERD3 may be data in which the unit areas having counts equal to or higher than the threshold among the plurality of unit areas UA11, UA12, ... UA55 are connected to each other. The threshold value may be one. The threshold value may be changed according to the embodiment.

Referring to FIG. 2A, the estimated road data ERD1 is data in which a plurality of unit areas UA53, UA43, UA33, UA23, UA13, UA14, and UA15 are connected to each other. The estimated road data ERD2 is data in which a plurality of unit areas UA31, UA32, UA33, UA34, UA35 are connected to one another. The estimated road data ERD3 is data in which a plurality of unit areas UA51, UA52, UA53, UA54, UA55 are connected to each other.

The frequency of use of the road can be confirmed according to the count number of the unit area included in the estimated road data ERD1, ERD2 and ERD3. It can be seen that the road use frequency of the estimated road data ERD1 is the highest, the road use frequency of the estimated road data ERD2 is intermediate, and the road use frequency of the estimated road data ERD3 is the lowest. The navigation device 10 can provide the driver with a vehicle path including the estimated road data ERD1 with the highest frequency of road use.

In one embodiment of the present invention, the unit areas UA11, UA12, ... UA55 may be divided into different groups according to the count of the unit area. For example, a unit zone in which the count is equal to or greater than the first reference number belongs to the first group, and a unit zone in which the count is equal to or greater than the threshold value but less than the first reference number, can belong to the second group. The first group may be divided into a first group and a first group. A unit zone having a count of a second reference number or more may belong to the first group, and the unit zone may include a first unit count and a second unit count. Lt; RTI ID = 0.0 > 1-2 < / RTI >

For example, when the threshold is set to 1, the first reference number is set to 9, and the second reference number is set to 25, the first_1 group includes unit areas UA53, UA43, UA33, UA23, UA13, UA14, UA15 , The first group 2 includes unit areas UA31, UA32, UA34, and UA35, and the second group UA51, UA52, UA54, and UA55 includes unit areas.

The estimated road data may be data obtained by connecting a plurality of unit areas having similar counts to each other. The estimated road data may be data obtained by connecting a plurality of unit areas belonging to the same group among a plurality of groups to each other.

The display can display the unit areas UA11, UA12, ... UA55 in a color corresponding to the number of times of passage. More specifically, the vehicle path can be displayed in a color corresponding to the group to which the unit zone belongs. That is, the display includes unit areas UA53, UA43, UA33, UA23, UA13, UA14, UA15 belonging to the first_1 group, unit areas UA31, UA32, UA34, UA35 belonging to the first_2 group, UA52, UA54, UA55) can be displayed in different colors.

For example, the display may display the unit areas UA53, UA43, UA33, UA23, UA13, UA14, UA15 belonging to the first_1 group in red and yellow according to the number of passage times, and the unit areas UA31, UA32, UA34, and UA35 in blue, and the unit areas belonging to the second group UA51, UA52, UA54, and UA55 in gray, black, and other achromatic colors. In addition, the display may not display colors for unit areas (UA11, UA12, UA21, UA22, UA24, UA25, UA41, UA42, UA44, UA45)

Therefore, the driver can travel on the route corresponding to the estimated road data ERD1 by referring to the color information displayed on the display.

FIG. 2B is a view for explaining estimated road data at a second time point according to an embodiment of the present invention.

It is assumed that a road area corresponding to the unit areas UA23, UA13, UA14, and UA15 that is a part of the estimated road data ERD1 is closed due to repair work or the like at the second time point.

The unit areas UA53, UA43, UA33, UA23, UA13, UA14, UA15, UA31, UA32, UA34 and UA35 belonging to the first group are counted to belong to the second group can be changed. The changed count may collectively be 8, which is the highest value among the counts of the second group. The reference period may be one week.

When the count is changed so that the unit areas UA23, UA13, UA14, and UA15 belonging to the first_1 group belong to the second group, the unit areas UA23, UA13, UA14, and UA15 are estimated to be the areas where the existing roads are closed . That is, it is assumed that when there is no input of feedback data for one week in a unit zone belonging to the first_1 group in which the frequency of road use is highest, sudden road use becomes impossible. As shown in FIG. 2B, the counts of the unit areas UA23, UA13, UA14, and UA15 can be collectively changed to 8 so as to belong to the second group.

Also, when the count is changed so as to belong to the second group because the input of the feedback data is not performed during the reference time in the unit zone belonging to the first_2 group, the unit zone can be estimated as the road zone having the first road use frequency. In other words, since the unit area belonging to the first_2 group is originally lower in frequency of road use than the first group, it may not be determined that the road is closed even if it is changed to belong to the second group. 2A and 2B, unit areas corresponding to this case are not shown.

In FIG. 2A, the unit areas UA31, UA32, UA34, and UA35 belonging to the first group are elevated to belong to the first group at the time of FIG. 2B. This ascending factor may be associated with the case where the unit areas UA23, UA13, UA14, UA15 are unavailable and the navigation device 10 may guide the vehicle path to the driver to use the estimated road data ERD2 .

The unit areas UA51, UA52, UA53, UA54, and UA55 where the count is maintained in the range of the second group are estimated to be road areas having the second road use frequency, and the second road use frequency is smaller than the first road use frequency .

2C is a view for explaining estimated road data at a third time point according to an embodiment of the present invention.

The counts of the unit areas UA23, UA13, UA14, and UA15 whose counts have changed to belong to the second group from the first_1 group can be reduced to the first rate before the input of the feedback data. The counts of the unit areas UA23, UA13, UA14 and UA15 at the second time point are 8 and the counts thereof are decreased at the first speed so that the counts of the unit areas UA23, UA13, UA14 and UA15 are 0 . For example, the first rate may be a rate at which the count decreases by 1 in the absence of feedback data input in 0.5-week increments. In this case, it may be that at least four weeks have elapsed from the second time point and data (ERD1, ERD2. ERD3) of estimated time at the third time point have been formed.

Also, when the count is changed so as to belong to the second group because there is no input of the feedback data during the reference time in the unit zone belonging to the first_2 group, the count of the unit zone may be reduced to the second rate before the input of the feedback data. For example, the second rate may be a rate that decreases by one if there is no input of feedback data in units of one week.

The count of the unit area in the unit area where the count is maintained in the range of the second group can be reduced to the third speed before the input of the feedback data. For example, the third rate may be the rate at which the count is maintained for six months after the last feedback data is entered, and then decreased by one every one month.

That is, the second speed and the third speed may be set to be slower than the first speed, assuming that the road is not closed. The first speed may be faster than the second speed, and the second speed may be faster than the third speed.

Embodiments of the present invention may further include the following driving method to prevent an error situation in which a vehicle is not counted even though it has passed through a specific unit area or is counted even though the vehicle has not passed through a specific unit area.

As described above, when there is no input of feedback data for a predetermined period in a specific unit area, the count of the specific unit area is reduced. However, even when there is no input of feedback data in a specific unit area, when there is an input of feedback data in a peripheral unit area of the specific unit area, the count of the specific unit area can be set to be maintained without being reduced. The peripheral unit area may be a unit area surrounding a specific unit area. For example, the peripheral unit area of the specific unit area UA33 may be the unit area UA22, UA23, UA24, UA34, UA44, UA43, UA42, UA32. The range size of the peripheral unit area can be set differently according to the embodiment.

As described above, when there is an input of feedback data in a specific unit area, the count of the specific unit area increases. However, even when there is an input of feedback data in a specific unit area, in the case where there is no input of feedback data in the peripheral unit area of the specific unit area, the count of the specific unit area can be set to be maintained without being increased.

3 is a flowchart illustrating a method of driving a navigation device according to an embodiment of the present invention.

The vehicle path provided by the navigation device 10 according to the presence or absence of the road data corresponding to the current position will be described with reference to FIG. It is assumed that the estimated road data is preferably stored in the database server 20 according to the above-described embodiment.

First, the current position of the vehicle is discriminated and an attempt is made to receive road data and estimated road data corresponding to the current position of the vehicle (S101). The road data can be received from the memory 100, and the estimated road data can be received from the database server 20 via the data transmission / reception unit 120.

Next, it is determined whether or not road data corresponding to the current position of the vehicle exists in the memory 100 (S102). If the road data corresponding to the current position is not stored in the memory 100, the road data may not be received in step S101. Accordingly, the process proceeds to step S103, where the navigation device 10 provides the vehicle path using the estimated road data.

If there is road data corresponding to the current position of the vehicle, it is determined whether the estimated road data corresponding to the current position and the road data coincide with each other (S104). When the estimated road data and the road data coincide with each other, either of the data may be used, so that the vehicle path can be provided using the road data (S105).

If the estimated road data and the road data corresponding to the current position do not coincide with each other, the navigation device 20 displays an inquiry on whether to use the estimated road data or the road data on the display screen, A response can be urged (S106). In one embodiment, the navigation device 20 can be set to use the road data of the memory 100 as a default value when the estimated road data corresponding to the current position and the road data do not coincide with each other. The default value may be set to use the estimated road data of the database server 20.

It may proceed to step 103 or step S105 in response to the driver's selection.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are illustrative and explanatory only and are intended to be illustrative of the invention and are not to be construed as limiting the scope of the invention as defined by the appended claims. It is not. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Navigation device
20: Database server
100: Memory
110:
120: Data transmission /
200: map data
UA11 ~ UA55: Unit area
ERD1 to ERD3: Estimated road data

Claims

A memory including road data;
A vehicle position determining unit for determining a current position of the vehicle;
A data transmitting and receiving unit transmitting feedback data including the current position to a database server and receiving estimated road data corresponding to the current position from the database server; And
And a control unit for providing a vehicle path using the estimated road data when road data corresponding to the current position does not exist in the memory,
The database server,
Wherein the control unit counts the number of passage of the corresponding unit zone based on the feedback data received from the vehicle passing through at least one of the plurality of unit zones, Generating estimated road data by connecting unit areas each having a number of times of passing through a predetermined threshold value or more,
Wherein the unit zone in which the count is greater than or equal to a first reference number belongs to a first group and the unit zone in which the count is less than the first reference number and is greater than or equal to the threshold value belongs to a second group, The count is changed to belong to the second group when there is no input of the feedback data during the reference period,
Wherein the unit zone in which the count is equal to or greater than a second reference number belongs to a first group of the first group and the unit zone in which the count is less than the first reference number and less than the second reference number, Group, and when the count is changed so that the unit zone belonging to the first_1 group belongs to the second group, the unit zone is estimated as a zone in which the existing road is closed, Is reduced to the first speed before the input of the data
Navigation device.

delete

The method according to claim 1,
If the count is changed such that the unit zone belonging to the first group is belonging to the second group, the unit zone is estimated as a road zone having a first road utilization frequency, Lt; RTI ID = 0.0 > 2 < / RTI >
Navigation device.

6. The method of claim 5,
Wherein the unit zone in which the count is maintained in the range of the second group is estimated to be a road zone having a second road frequency of use and a count of the unit zone is reduced to a third rate before input of the feedback data, 2 road use frequency is smaller than the first road use frequency,
Navigation device.

The method according to claim 6,
Wherein the first speed is faster than the second speed, the second speed is faster than the third speed,
Navigation device.

8. The method of claim 7,
Wherein when there is no input of the feedback data in the unit area, the count of the unit area is maintained without reduction when the feedback data is input in the peripheral unit area,
Navigation device.

9. The method of claim 8,
Wherein when the feedback data is input in the unit area, the count of the unit area is maintained without increasing the input of the feedback data in the peripheral unit area,
Navigation device.

The method according to claim 1,
When the road data corresponding to the current position exists and the road data does not coincide with the estimated road data,
The road data or the estimated road data is used in accordance with the driver's selection,
Navigation device.

Determining a current position of the vehicle;
Transmitting feedback data including the current position to a database server;
Attempting to receive road data from the memory;
Receiving estimated road data corresponding to the current location from the database server;
Providing the vehicle path using the estimated road data when the road data corresponding to the current position does not exist in the memory;
Counting the number of passage of the corresponding unit zone based on the feedback data received from the vehicle via at least one of the plurality of unit zones of the map data included in the database server; And
Generating estimated road data by connecting unit areas having the number of times of passage of each of the plurality of unit areas exceeding a predetermined threshold value,
Wherein the unit zone in which the count is greater than or equal to a first reference number belongs to a first group and the unit zone in which the count is less than the first reference number and is greater than or equal to the threshold value belongs to a second group, The count is changed to belong to the second group when there is no input of the feedback data during the reference period,
Wherein the unit zone in which the count is equal to or greater than a second reference number belongs to a first group of the first group and the unit zone in which the count is less than the first reference number and less than the second reference number, Group, and when the count is changed so that the unit zone belonging to the first_1 group belongs to the second group, the unit zone is estimated as a zone in which the existing road is closed, Is reduced to the first speed before the input of the data
A driving method of a navigation device.

delete

12. The method of claim 11,
If the count is changed such that the unit zone belonging to the first group is belonging to the second group, the unit zone is estimated as a road zone having a first road utilization frequency, Lt; RTI ID = 0.0 > 2 < / RTI >
A driving method of a navigation device.

16. The method of claim 15,
Wherein the unit zone in which the count is maintained in the range of the second group is estimated to be a road zone having a second road frequency of use and a count of the unit zone is reduced to a third rate before input of the feedback data, 2 road use frequency is smaller than the first road use frequency,
A driving method of a navigation device.

17. The method of claim 16,
Wherein the first speed is faster than the second speed, the second speed is faster than the third speed,
A driving method of a navigation device.

18. The method of claim 17,
Wherein when there is no input of the feedback data in the unit area, the count of the unit area is maintained without reduction when the feedback data is input in the peripheral unit area,
A driving method of a navigation device.

19. The method of claim 18,
Wherein when the feedback data is input in the unit area, the count of the unit area is maintained without increasing the input of the feedback data in the peripheral unit area,
A driving method of a navigation device.

12. The method of claim 11,
Further comprising the step of using the road data or the estimated road data according to a driver's selection when the road data corresponding to the current position exists and the road data does not match the estimated road data
A driving method of a navigation device.

A memory including road data;
A vehicle position determining unit for determining a current position of the vehicle;
A data transmitting and receiving unit transmitting feedback data including the current position to a database server and receiving estimated road data corresponding to the current position from the database server;
A control unit for providing a vehicle route using the estimated road data when the road data corresponding to the current position does not exist in the memory; And
And a display for displaying the vehicle route in a color corresponding to the number of times of passage,
The database server,
Wherein the control unit counts the number of passage of the corresponding unit zone based on the feedback data received from the vehicle passing through at least one of the plurality of unit zones, Generating estimated road data by connecting unit areas each having a predetermined number of times or more as a threshold value,
Wherein the display displays the unit area in a color corresponding to the number of times of passing,
Wherein the unit zone in which the count is greater than or equal to a first reference number belongs to a first group and the unit zone in which the count is less than the first reference number and is greater than or equal to the threshold value belongs to a second group, When the feedback data is not input during the reference period, the count is changed so as to belong to the second group, and the display displays the unit zone belonging to the first group and the unit zone belonging to the second group with different colors Lt; / RTI >
Wherein the unit zone in which the count is equal to or greater than a second reference number belongs to a first group of the first group and the unit zone in which the count is less than the first reference number and less than the second reference number, Group, and when the count is changed so that the unit zone belonging to the first_1 group belongs to the second group, the unit zone is estimated as a zone in which the existing road is closed, And the display unit displays the unit zone belonging to the first group, the unit zone belonging to the first group and the unit zone belonging to the second group in different colors until the data is inputted
Navigation display device.

delete

22. The method of claim 21,
If the count is changed such that the unit zone belonging to the first group is belonging to the second group, the unit zone is estimated as a road zone having a first road utilization frequency, Lt; RTI ID = 0.0 > 2 < / RTI >
Navigation display device.

26. The method of claim 25,
Wherein the unit zone in which the count is maintained in the range of the second group is estimated to be a road zone having a second road frequency of use and a count of the unit zone is reduced to a third rate before input of the feedback data, 2 road use frequency is smaller than the first road use frequency,
Navigation display device.

27. The method of claim 26,
Wherein the first speed is faster than the second speed, the second speed is faster than the third speed,
Navigation display device.

28. The method of claim 27,
Wherein when there is no input of the feedback data in the unit area, the count of the unit area is maintained without reduction when the feedback data is input in the peripheral unit area,
Navigation display device.

29. The method of claim 28,
Wherein when the feedback data is input in the unit area, the count of the unit area is maintained without increasing the input of the feedback data in the peripheral unit area,
Navigation display device.

22. The method of claim 21,
When the road data corresponding to the current position exists and the road data does not coincide with the estimated road data,
The road data or the estimated road data is used in accordance with the driver's selection,
Navigation display device.