TWI415041B - Electronic apparatus and method for displaying map - Google Patents

Abstract

A method for displaying a map includes following steps: receiving satellite signals from satellites, and generating current location information of an electronic apparatus, which receives the satellite signals, according to the satellite signals; obtaining resolution of a display of the electronic apparatus; establishing a mapping relation between the display and the current location information based on the current location information as the center of the display; generating a set of location information corresponding to the edges of the display according to the resolution and the mapping relation; transmitting the set of location information and the current location information to the a map server communicating with the electronic apparatus; receiving a predetermined map information transmitted by the map server base on the set of location information and the current location information; and displaying a map adapted to a size of the display on the display according to the predetermined map information. Moreover, a related electronic apparatus having navigation function is provided.

Description

Electronic device and map display method

The present invention relates to the field of navigation, and in particular, to an electronic device and a map display method.

The Global Positioning System (GPS) has been widely used as a mobile electronic device as a personal navigation device. According to the existing method, the mobile electronic device pre-stores a map with a large amount of data, and after starting the navigation function of the mobile electronic device, the mobile electronic device receives the signal from the GPS satellite and generates a reaction for moving by processing the received signal. The current location information of the current location of the electronic device is then selected from the pre-stored map according to the generated current location information, and the current location of the mobile electronic device is indicated in the displayed map.

However, since the amount of map data stored in advance in the mobile electronic device is relatively large (the amount of data is above 1 G), the storage space of the mobile electronic device is occupied, so that the storage space of the mobile electronic device becomes insufficient, and the mobile electronic device cannot respond in time. User's operation; in addition, the user needs to spend time updating the map stored in the mobile electronic device to ensure the integrity of the geographic information in the map. In this way, the user is inconvenienced in use.

In view of this, it is necessary to provide an electronic device with navigation function that is convenient for the user.

It is also necessary to provide a map display method.

An electronic device is configured to connect to a map server, the electronic device includes a GPS signal receiving module, a control module, a communication module, and a display screen, and the GPS signal receiving module is configured to receive a positioning signal sent by the artificial satellite, and receive the positioning signal according to the receiving The positioning signal generates current location information of the electronic device. The control module is configured to obtain the resolution of the display screen, and establish a mapping relationship between the current location information and the display screen by using the current location information as the center of the display screen, and generate and display the edge of the screen according to the acquired resolution and the established mapping relationship. The location information group corresponding to the coordinate point corresponding to the pixel point, and the current location information and the location information group are sent by the communication module to the map server that establishes a network connection with the electronic device. The control module is further configured to provide the map data that is received by the communication module and adapted by the map server according to the current location information and the location information group to the display screen size, to the display screen display.

A map display method includes the steps of: receiving a satellite signal transmitted by a satellite, generating a current position information of a current position of an electronic device configured with a GPS signal receiving module according to the received satellite signal; and acquiring a resolution of the display screen of the electronic device; Establish current location information and display with the current location information as the center of the display The mapping relationship between the screens; obtaining the location information group corresponding to the edge of the display screen according to the obtained resolution and the established mapping relationship; sending the current location information and the location information group to the map server establishing the network connection with the electronic device; receiving the map servo Corresponding preset map data transmitted by the current location information and the location information group; displaying a map adapted to the display screen in the display screen according to the received map data.

According to the electronic device and the map display method, after the user turns on the navigation function of the electronic device, the electronic device sends the generated current location information and the location information group corresponding to the edge of the display screen to the professional map that establishes a network connection with the electronic device. The server obtains a map that matches the size of the display screen from the map server. In this way, the user does not need to store the map data to the electronic device and periodically update the stored map data, and the electronic device can be used to find the current location and the surrounding geographical environment.

20‧‧‧Network

30‧‧‧Electronic devices

31‧‧‧GPS signal receiving module

32‧‧‧Input module

33‧‧‧Control Module

34‧‧‧Communication Module

35‧‧‧ display screen

330‧‧‧Central Processing Unit

331‧‧‧ memory

333‧‧‧resolution acquisition program

334‧‧‧ punctuation conversion program

335‧‧‧Edge coordinate point generator

332‧‧‧ operating system program

336‧‧‧Point of Interest Location Information Generator

337‧‧‧ Cross-border judgment program

40‧‧‧Map Server

S601~S611‧‧‧Map display method flow

FIG. 1 is a schematic diagram of a network architecture of an electronic device according to a preferred embodiment.

2 is a functional block diagram of the electronic device of FIG. 1.

3 is a functional block diagram of a control module in the electronic device of FIG. 2.

4 is a functional module of a control module of an electronic device according to another preferred embodiment Figure.

FIG. 5 is a flow chart of a map display method according to a preferred embodiment.

As shown in FIG. 1 , it is a schematic diagram of a network architecture of an electronic device 30 according to a preferred embodiment. The electronic device 30 is connected to the map server 40 via the network 20. The electronic device 30 receives the positioning signal 10 sent by the artificial satellite, and generates current position information according to the received positioning signal 10. The electronic device 30 provides the current location information to the map server 40 via the network 20, and receives the map data provided by the map server 40 according to the received current location information. The electronic device 30 displays the map according to the received map data for the user's reference. The electronic device 30 can be a mobile phone with navigation function, a personal digital assistant, a handheld game console, and the like. The network connection established by the electronic device 30 and the map server 40 may be wireless or wired or a combination of wireless and wired. The map server 40 stores various maps and can dynamically update the materials in the map.

Referring to FIG. 2 simultaneously, the electronic device 30 includes a GPS signal receiving module 31, an input module 32, a control module 33, a communication module 34, and a display screen 35.

The GPS signal receiving module 31 is configured to receive the positioning signal 10 sent by the artificial satellite, generate the current position information according to the received positioning signal 10, and provide the current position information to the control module 33. The current location information is a coordinate point in a space rectangular coordinate system, and the current location information includes a longitude value, a latitude value, and a height value.

The input module 32 is configured to respond to a user input operation and generate a corresponding input. News. For example, the input module 32 can be a button, a touch screen, or the like.

The display screen 35 is used to display the data provided by the control module 33. For example, the display screen 35 can be a liquid crystal display.

The control module 33 is configured to obtain the resolution of the display screen 35, and establish a mapping relationship between the current location information and the display screen by using the current location information as the center of the display screen 35, and generate and match according to the acquired resolution and the established mapping relationship. The location information group corresponding to the coordinate point corresponding to the edge pixel of the screen 35 is displayed, and the current location information and the location information group are transmitted by the communication module 34 to the map server 40 that establishes a network connection with the electronic device 30. The manner of establishing the mapping relationship is as follows: the coordinate information of the geodetic coordinate system and the Gaussian coordinate system of the current position information in the space rectangular coordinate system is obtained, and the coordinate point in the plane rectangular coordinate system is obtained, and the coordinate point and the center of the display screen 35 are obtained. Corresponding coordinate points corresponding to pixels. The location information group includes a plurality of location information corresponding to edge coordinate points of the display screen 35.

The control module 33 is further configured to provide the map data corresponding to the size of the display screen 35 transmitted by the map server 40 according to the current location information and the location information group received by the communication module 34 to the display screen 35 for display.

Referring to FIG. 3, the control module 33 includes a central processing unit (CPU) 330 and a memory 331. The memory 331 is used to store operating system programs and applications. The application includes a resolution acquisition program 333, a coordinate point conversion program 334, an edge coordinate point generation program 335, and an operating system program 332. The central processing unit 330 running the operating system program 332 can manage and control the GPS signal reception in the electronic device 30. The module 31, the input module 32, the communication module 34, the memory 331 and the display screen 35. For example, the central processing unit 240 executes the application according to an instruction generated by the input module 32 in response to the user's operation to turn on the navigation function of the electronic device 30.

After running the application, the central processing unit 330 generates the following functional unit: a resolution acquiring unit for acquiring the resolution of the display screen 35; and a coordinate point conversion unit for establishing a mapping relationship between the current position information and the display screen 35. And converting the coordinate points corresponding to the pixel points on the display screen 35 to the position information related to the current position information according to the mapping relationship.

The edge coordinate point generating unit is configured to generate a coordinate point corresponding to the edge pixel of the display screen 35 according to the obtained resolution of the display screen 35, and provide the generated coordinate point to the coordinate point conversion unit.

For example, the resolution of the display screen 35 acquired by the resolution acquisition unit is 320×240. The coordinate point conversion unit converts the current position information into a coordinate point in the plane rectangular coordinate system (a, b), and corresponds the coordinate point (a, b) to the coordinate point (160, 120) corresponding to the center of the display screen 35. . The edge coordinate point generating unit calculates a coordinate point corresponding to one pixel point at the edge of the display screen 35, such as a coordinate point (160, 240), and supplies the coordinate point (160, 240) to the coordinate point conversion unit. The coordinate point conversion unit converts the coordinate points (160, 240) into (a, b + 120) and converts (a, b + 120) into position information.

In the present embodiment, the electronic device 30 requests the map server 40 to transmit a map having the same display size as the display screen 35, so that a map larger than the display size of the display screen 35 is not received, and thus, the user uses GPRS (General). In the case where the packet radio service is connected to the map server 40, the amount of data flow between the electronic device 30 and the map server 40 can be reduced.

In another preferred embodiment, the control module 33 further determines whether the current location information generated by the GPS signal receiving module 31 exceeds the boundary of the map currently displayed on the display screen 35, and determines that the current location information exceeds the current display. At the boundary of the map, the map server 40 is re-requested to provide a corresponding map; the control module 33 also responds to the user's operation of selecting the point of interest on the map displayed on the display screen 35 to generate the location information of the point of interest, and by means of the communication module 34 sends the point of interest location information and the pre-stored interest information to the map server 40. The interest information can be a snack bar, a bus platform, a bank, and the like. The map server 40 provides corresponding information to the electronic device 30 based on the received point of interest location information and interest information. In addition, the input module 32 and the display screen 35 in the electronic device 30 can be replaced by a touch screen.

Referring to FIG. 4 at the same time, correspondingly, the memory 331 stores the interest information, and the application program includes a sub-program such as the point of interest location information generating program 336 and the out-of-bounds determining program 337. The central processor 330 also generates the following functional units after running the application:

a point of interest coordinate generating unit, configured to respond to a user selecting an interest point on the currently displayed map, generating a coordinate point corresponding to the point of interest, and providing the coordinate point conversion unit to obtain the point of interest position by using the coordinate point conversion unit News.

The out-of-bounds determining unit is configured to compare the current location information generated by the GPS signal receiving module 31 with the location information in the location information group to determine whether the current location of the electronic device 30 exceeds the boundary of the displayed current map, and is determined When the current position of the electronic device 30 exceeds the boundary of the currently displayed map, the coordinate point conversion unit and the edge coordinate point generation unit are called to operate.

For example, when the user clicks on a point of interest on the map displayed by the touch screen by using the stylus, the control module 33 acquires the coordinate point corresponding to the pixel point touched by the stylus and the touch screen, and then converts the coordinate point into and according to the mapping relationship. The location information related to the location information of the current location information; the control module 33 further determines whether the current location information generated by the GPS signal receiving module 31 exceeds the boundary of the map currently displayed on the touch screen, and determines the current location generated by the GPS signal receiving module 31. When the information does not exceed the boundary of the map, the communication node 34 transmits the point of interest location information and the pre-stored interest information to the map server 40. The map server 40 provides corresponding information to the electronic device 30 based on the received point of interest location information and interest information.

As shown in FIG. 5, it is a flowchart of a map display method according to a preferred embodiment, and the method includes the following steps:

Step S601, receiving a satellite signal transmitted by the satellite, and generating, according to the received satellite signal, current position information of a current location of the electronic device configured with the GPS signal receiving module. The current location information is a coordinate point in a space rectangular coordinate system, and the current location information includes a longitude value, a latitude value, and a height value.

Step S602, obtaining the resolution of the display screen of the electronic device.

In step S603, the current location information is used as the center of the display screen, and the mapping relationship between the current location information and the display screen is established. The manner of establishing the mapping relationship is as follows: the coordinate information of the geodetic coordinate system and the Gaussian coordinate system of the current position information in the space rectangular coordinate system is converted to obtain a coordinate point in the plane rectangular coordinate system, and the coordinate point corresponds to the central pixel of the display screen. The coordinate points correspond to each other.

Step S605, obtaining a location information group corresponding to the edge of the display screen according to the obtained resolution and the established mapping relationship.

Step S607: Send the current location information and the location information group to the map server that establishes a network connection with the electronic device.

Step S609, receiving corresponding preset map data transmitted by the map server according to the current location information and the location information group.

Step S611, displaying a map adapted to the display screen in the display screen according to the received map data.

In other embodiments, the map display method further includes the following steps: determining whether the current location information generated by the GPS signal receiving module exceeds the boundary of the current map displayed by the display screen; determining that the current location information exceeds the current display screen When the border of the map is re-requested, the map server provides the corresponding map.

In other embodiments, the map displayed in the display screen may also be updated by determining whether the current location information deviates from the center point of the display screen.

With the above electronic device and map display method, the user turns on the electronic device After the navigation function, the electronic device sends the generated current location information and the location information group corresponding to the edge of the display screen to a professional map server that establishes a network connection with the electronic device, so as to obtain the size of the display screen from the map server. map. In this way, the user does not need to store the map data to the electronic device and periodically update the stored map data, and the electronic device can be used to find the current location and the surrounding geographical environment.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above descriptions are only preferred embodiments of the present invention, and those skilled in the art will be able to include equivalent modifications or variations in the spirit of the present invention.

S601~S611‧‧‧Map display method flow

Claims (9)

An electronic device is configured to connect to a map server, the electronic device includes a GPS signal receiving module, a control module, a communication module, and a display screen, and the GPS signal receiving module is configured to receive a positioning signal sent by the artificial satellite, and receive the positioning signal according to the receiving The positioning signal generates the current location information of the electronic device, and the improvement is that the control module is configured to obtain the resolution of the display screen, and establish a mapping relationship between the current location information and the display screen by using the current location information as a center of the display screen, and And generating, according to the acquired resolution and the established mapping relationship, a location information group corresponding to the coordinate point corresponding to the pixel edge of the display screen, and sending the current location information and the location information group to the map server by using the communication module, where The control module is further configured to provide the map data that is received by the communication module and adapted by the map server according to the current location information and the location information group to the display screen size, to the display screen display. The electronic device of claim 1, wherein the mapping relationship is established by converting the current location information to a coordinate point in a Cartesian coordinate system, and the coordinate point corresponding to the central pixel of the display screen. Corresponding. The electronic device of claim 2, wherein the control module is further configured to immediately determine whether the current location information generated by the GPS signal receiving module exceeds the boundary of the map currently displayed on the display screen, and determines the current When the location information exceeds the boundary of the currently displayed map, the map server is re-requested to provide the corresponding map. The electronic device of claim 3, wherein the control module further The operation for generating the interest point on the current map in response to the user selection, generating the interest point location information, and transmitting the interest point location information and the pre-stored interest information to the map server by using the communication module. The electronic device of claim 4, wherein the display screen is a touch screen. The electronic device of claim 4, wherein the control module comprises a central processing unit and a memory, wherein the memory is used to store an application, and the central processor generates the following functional unit after running the application: The degree acquisition unit is configured to obtain the resolution of the display screen; the coordinate point conversion unit is configured to establish a mapping relationship between the current location information and the display screen, and convert the coordinate points corresponding to the pixel points on the display screen into and according to the mapping relationship. The position information related to the current location information; the edge coordinate point generating unit is configured to generate a coordinate point corresponding to the edge pixel of the display screen according to the resolution of the acquired display screen, and provide the generated coordinate point to the coordinate point conversion unit; The out-of-bounds determining unit is configured to compare the current location information generated by the GPS signal receiving module with the location information in the location information group to determine whether the current location of the electronic device exceeds a boundary of the displayed current map, and determine the electronic device Calling the coordinate point conversion unit and the current position beyond the boundary of the currently displayed map The edge coordinate point generating unit works; the point of interest coordinate generating unit is configured to respond to the operation of the user to select the point of interest on the current map displayed by the display screen, generate a coordinate point corresponding to the point of interest, and provide the coordinate point conversion unit to The point of interest location information is obtained by the coordinate point conversion unit. A map display method includes the steps of: receiving a satellite signal transmitted by a satellite, generating a current position information of a current position of an electronic device configured with a GPS signal receiving module according to the received satellite signal; and acquiring a resolution of the display screen of the electronic device; Using the current location information as the center of the display screen, establishing a mapping relationship between the current location information and the display screen; obtaining a location information group corresponding to the edge of the display screen according to the obtained resolution and the established mapping relationship; transmitting the current location information and the location information group a map server for establishing a network connection with the electronic device; receiving corresponding preset map data transmitted by the map server according to the current location information and the location information group; displaying the display screen according to the received map data according to the received map information map. The method for displaying a map according to claim 7, wherein the method further comprises the following steps: determining whether the current location information generated by the GPS signal receiving module exceeds the boundary of the map currently displayed on the display screen; When the location information exceeds the boundary of the map currently displayed on the display screen, the map server is requested again to provide the corresponding map. For example, in the map display method described in claim 7, wherein the mapping relationship is established by converting the current location information to a coordinate point in a Cartesian coordinate system, and the coordinate corresponding to the central pixel of the display screen Point corresponding .