# Patent

## Title
Method of dynamically changing content displayed in a vehicular head unit and mobile terminal for the same

## Abstract

A method of dynamically changing content in a head unit mirroring a mobile terminal by dynamically changing content displayed in the mobile terminal, and a mobile terminal for the same, the method including receiving state information indicating a current state of a vehicle equipped with the head unit from the head unit, determining the content to be displayed in the head unit based on the state information and transmitting the determined content to the head unit.

## Background
PRIORITY
This application claims the priority under 35 U.S.C. §119(a) to a Korean Patent Application filed in the Korean Intellectual Property Office on Jul. 5, 2011 and assigned Serial No. 10-2011-0066200, and a Korean Patent Application filed in the Korean Intellectual Property Office on Jul. 3, 2012 and assigned Serial No. 10-2012-0072213, the content of each of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a method of dynamically changing content displayed in a vehicular head unit, and more particularly to a method of dynamically changing content in a head unit mirroring a mobile terminal by dynamically changing the content displayed in the mobile terminal in the vehicular head unit for infotainment and the mobile terminal, based on a state of a vehicle, and a mobile terminal for the same.
2. Description of the Related Art
Recently, vehicles are being recognized as a space where a user can enjoy various entertainment, for example, listening to music, watching TeleVision (TV) and the like, instead of only being used as a means of transportation. As a result of such a trend, an infotainment device for allowing an exchange of various information, between a vehicular head unit installed within the vehicle and a mobile terminal, through an interworking or displaying media such as music or a video, is being developed. A system for providing the infotainment provides various data or information to a user in the form of audio, video, or a combination thereof, to increase user convenience. Through Virtual Network Communication (VNC) technology, it is possible to display the same content as displayed in the mobile terminal display device (e.g. navigation device) pre-installed within the head unit by providing the content from the mobile terminal to the head unit within the vehicle. However, the display device in the head unit can only receive and display content pre-stored in the mobile terminal. Further, the mobile terminal cannot reflect a current state of the vehicle so that the content stored in the mobile terminal cannot be changed even though the mobile terminal is connected to the head unit of the vehicle. Accordingly, the mobile terminal may distract a user driving the vehicle by displaying content, which is preferably not displayed while the vehicle is moving, in the head unit.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made to solve the above-stated problems and disadvantages occurring in the prior art, and to provide at least the advantages described below.
An aspect of the present invention provides a method of dynamically changing content displayed in a head unit of a vehicle mirroring a mobile terminal and displaying the content displayed in the mobile terminal by dynamically changing the content in the vehicular head unit and the mobile terminal according to a state of the vehicle, and a mobile terminal for the same.
According to an aspect of the present invention, there is provided a method of dynamically changing content displayed in a head unit of a vehicle by a mobile terminal, the method including receiving state information indicating a current state of the vehicle equipped with the head unit from the head unit, determining the content to be displayed in the head unit based on the state information, and transmitting the determined content to the head unit.
According to another aspect of the present invention, there is provided a mobile terminal including a communication interface for receiving state information indicating a current state of a vehicle equipped with a head unit from the head unit, and a controller for determining content to be displayed in the head unit based on the state information and controlling the communication interface to transmit the determined content to the head unit.
According to yet another aspect of the present invention, there is provided a head unit including a state detector for detecting a state of a vehicle and generating state information according to the detected state, a communication interface for transmitting the state information to a mobile terminal and receiving content corresponding to the state information and a display unit for displaying the content.



BRIEF DESCRIPTION OF THE DRAWINGS
The above and other aspects, features, and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a block diagram illustrating of a VNC system including a vehicular head unit and a mobile terminal, according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method of dynamically changing content displayed in the head unit included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method of dynamically changing content displayed in the head unit included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a method of dynamically changing content displayed in a first display unit of the head unit by the mobile terminal included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method of dynamically changing content displayed in a second display unit of the head unit included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention; and
FIGS. 6A and 6B illustrate content displayed in the mobile terminal and the head unit illustrated in FIG. 1, according to an embodiment of the present invention.



DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
Hereinafter, various embodiments of the present invention are described in detail with reference to the accompanying drawings. In the following description of the present invention and the accompanying drawings, a detailed description of known functions and configurations will be omitted to avoid obscuring the subject matter of the present.
FIG. 1 is a block diagram illustrating a construction of a VNC system including a vehicular head unit and a mobile terminal, according to an embodiment of the present invention.
Referring to FIG. 1, a virtual network system includes the mobile terminal 100 and the vehicular head unit 200. The mobile terminal 100 and the head unit 200 are connected through a wire or wirelessly to configure a VNC system. Through the configuration of the VNC system, a user can remotely control the mobile terminal 100 by using the head unit 200.
When the VNC system is configured, the mobile terminal 100 transmits content, for example, a list of applications displayed on a display screen of the mobile terminal, that is, a first display unit 106 to the head unit 200 through a wire or wirelessly. The head unit 200 receives the content from the mobile terminal 100 and displays the received content on a display screen included in the head unit 200, that is, a second display unit 206. The head unit 200 displays the content received from the mobile terminal 100 on the display screen by mirroring the display screen of the mobile terminal 100. That is, content displayed on the display screens of the mobile terminal 100 and the head unit 200 is the same.
As described above, when the same content is simultaneously displayed on the display screens of the mobile terminal 100 and the head unit 200, the mobile terminal 100 receives state information indicating a state of a vehicle equipped with the head unit 200 from the head unit 200. The head unit 200 periodically detects a current state (e.g. parked or stopped) of the vehicle in every predetermined period of time, generates state information according to the detected current state, and then transmits the generated state information to the mobile terminal 100.
The mobile terminal 100 receives the state information indicating the current state of the vehicle from the head unit 200, and determines content to be displayed on the display screen based on the state information. For example, when the vehicle is moving, the mobile terminal 100 removes content that hinders a user's driving ability from the display screen. For example, the mobile terminal 100 displays a list of applications including only the remaining applications except for dynamic image related applications such as a Digital Multimedia Broadcast (DMB) and the like, which may distract the attention of the driving user and thus are removed from the list of the applications. As described above, the mobile terminal 100 renews the application list to be displayed on the display screen according to the current state of the vehicle.
By determining the content to be displayed on the display screen according to the current state of the vehicle, the mobile terminal 100 also determines content to be displayed on the display screen of the head unit 200 operating the vehicle.
Referring to FIG. 1, the mobile terminal 100 includes a first communication interface 102, a first user input unit 104, a first display unit 106, a first memory 130, and a first controller 120, and the first controller 120 includes a content list determiner 122.
The first communication interface 102 performs wired or wireless communication. The first communication interface 102 transmits various types of content, for example, a list of applications displayed through the first display unit 106, to the head unit 200. Further, the first communication interface 102 receives the state information indicating the current state of the vehicle from the head unit 200.
The first user input unit 104 receives a user input from the user. The first user input unit 104 receives a user input for selecting content, for example, the applications selected to be displayed through the display unit 106.
The first user input unit 104 receives a selection to display or not to display an application according to the current state of the vehicle from the user. For example, when the vehicle is moving, the first user input unit 104 receives a user input for not displaying an application A on the display screen of the mobile terminal 100.
The first user input unit 104 receives a user input for displaying or not displaying a particular application in the head unit 200 of the moving vehicle whenever the corresponding application is installed in the mobile terminal 100.
The first display unit 106 includes a display screen such as a touch screen, and displays various types of data stored in the mobile terminal 100. The first display unit 106 displays various types of content stored in the mobile terminal 100, for example, an application list including one or more applications. When the first display unit 106 is implemented as a touch screen, the first display unit 106 is also used as the first user input unit 104 for receiving the user input.
The first memory 130 stores various types of data for controlling the mobile terminal 100 and various types of content to be displayed through the first display unit 106, for example, the application list.
The first memory 130 stores content which is displayed through the first display unit 106 or the second display unit 206 of the head unit 200, for example the application list based on the state of the vehicle.
The first controller 120 controls an overall operation of the mobile terminal 100. The first controller 120 includes the content list determiner 122 for determining content, for example, the application list to be displayed on the display screen of the head unit 200 connected to the mobile terminal 100 through a wire or wirelessly.
When the state information indicating the current state of the head unit 200 is received from the head unit 200 through the first communication interface 102, the content list determiner 122 of the first controller 120 determines the application list to be displayed in the first display unit 106 based on the state information.
For example, when the vehicle is moving, the content list determiner 122 controls the first display unit 106 to display an application list including only the remaining applications, except for applications related to a dynamic image such as a DMB, a dynamic image player and the like. When the vehicle is not moving, the content list determiner 122 controls the first display unit 106 to display an application list, including the applications related to the dynamic image such as the DMB, the dynamic image player and the like.
Since the first display unit 106 of the mobile terminal 100 is mirrored with the second display unit 206 of the head unit 200, the first controller 120 also controls the application list displayed in the second display unit 206 by controlling the application list displayed in the first display unit 106.
The first controller 120 determines whether a particular application is displayed in the head unit 200 whenever the corresponding application is installed in the mobile terminal 100. For example, it is assumed that when an “application D” is installed in the mobile terminal 100, the application D is determined as an application that is not displayed in the head unit 200 by the first controller 120. Accordingly, although the VNC system is configured through the connection between the mobile terminal 100 and the head unit 200, the application D is not displayed in the second display unit 206 of the head unit 200 regardless of the state of the vehicle.
The first controller 120 receives a user input for determining whether the application is displayed in the head unit 200 through the first user input unit.
According to an embodiment of the present invention, the first controller 120 controls a time when the state information is received through the first communication interface 102. The first controller 120 sets a reception condition for receiving the state information from the head unit 200. For example, the first controller 120 sets the reception condition to receive the state information only when the vehicle is moving. When the reception condition is set as described above, the first controller 120 notifies the head unit 200 of the reception condition through the first communication interface 102. The head unit 200 having received the reception condition transmits the state information to the mobile terminal 100 only when the reception condition is satisfied.
Referring to FIG. 1, the head unit 200 includes a second communication interface 202, a second user input unit 204, a second display unit 206, a second memory 208, and a second controller 220, and may further include a state detector 210.
The second communication interface 202 performs wired or wireless communication. The second communication interface 202 transmits state information generated by the state detector 210 to the mobile terminal 100. Further, the second communication interface 202 receives content, for example, an application list to be displayed through the second display unit 206 from the mobile terminal 100.
The second communication interface 202 receives a user input for selecting one application included in the application list displayed through the second display unit 206. As described above, the second communication interface 202 transmits the user input having been input through the second user input unit 204 to the mobile terminal 100 under a control of the second controller 220.
The second user input unit 204 receives a user input from the user. The second user input unit 204 receives a user input for selecting content, for example, applications to be displayed through the second display unit 206.
The second user input unit 204 receives a selection to display or not to display an application according to a current state of the vehicle from the user. For example, when the vehicle is moving, the second user input unit 204 receives a user input for not displaying the “application A” on the display screen of the head unit 200.
The second display unit 206 includes a display screen such as a touch screen and displays various types of data stored in the head unit 200 similarly to the first display unit 106. The second display unit 206 is mirrored with the first display unit 106 of the mobile terminal 100, so that the second display unit 206 displays the same content as that of the first display unit 106 of the mobile terminal 100 in real time. For example, the second display unit 206 also displays the “content B” while the first display unit 106 of the mobile terminal 100 is displaying the “content B.”
When the second display unit 206 is implemented as a touch screen, the second display unit 206 is also used as the second user input unit 204 for receiving the user input. The second memory 208 stores various types of data for controlling the mobile terminal 200. The second memory 208 stores various types of content, for example, the application list to be displayed through the second display unit 206.
The second controller 220 controls an overall operation of the head unit 200. The second controller generates the state information indicating the current state of the vehicle by controlling the state detector 210, and transmits the state information to the mobile terminal 100 by controlling the second communication interface 202.
The second controller 220 determines applications to be displayed through the second display unit 206 based on the state information generated by the state detector 210. When the application list to be displayed through the second display unit 206 is determined, the second controller 220 makes a request for the application list including the applications from the mobile terminal 100 by controlling the second communication interface 202.
The state detector 210 detects the current state of the vehicle and generates the state information according to the detected current state. The state detector 210 periodically detects the current state of the vehicle in every predetermined period of time in the second memory 208. Further, whenever a particular event indicating a change in a state of the vehicle is generated, the state detector 210 generates the state information on the current state of the vehicle by detecting the event.
The state information generated by the state detector 210 indicates the current state of the vehicle equipped with the head unit 200. For example, the state information indicates whether the vehicle is moving or not (i.e. the vehicle is parked or stopped), and indicates whether a vehicle engine is turned on or turned off Further, the state information indicates that, for example, the vehicle gear is in park gear, reverse gear, neutral gear, or drive gear states. Further, the state information includes the driving speed of the vehicle. The state detector 210 includes various sensors (acceleration sensors and the like) for detecting the state of the vehicle.
FIG. 2 is a flowchart illustrating an example of a method of dynamically changing content displayed in the head unit included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention.
Referring to FIG. 2, the mobile terminal 100 and the head unit 200 are connected through a wire or wirelessly to configure the VNC system in step S302. When the VNC system is configured, the head unit 200 detects a current state of the vehicle in step S304, and generates state information according to a result of the detection in step S306.
The head unit 200 transmits the state information to the mobile terminal 100 in step S308. The mobile terminal 100 determines content, for example, an application list to be displayed through the first display unit 106 based on the state information received in step S308 in step S310. The first controller 120 of the mobile terminal 100 determines the current state of the vehicle equipped with the head unit 200 based on the state information received in step S308. The first controller 120 determines content to be displayed in the first display unit 106 and the second display unit having mirrored the first display unit 106 according to the current state of the vehicle. At this time, the first controller 120 removes content that may distract the attention of the driving user from the content to be displayed in the first display unit 106 and the second display unit 206.
When the application list is determined, the mobile terminal 100 transmits the determined application list to the head unit 200 in step S312. The mobile terminal 100 and the head unit 200 displays the application list, respectively in steps S314 and S316. Through the display of the application list received from the mobile terminal by the second display unit 206 of the head unit 200, the head unit 200 mirrors the mobile terminal 100.
FIG. 3 is a flowchart illustrating another example of a method of dynamically changing content displayed in the head unit included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention. It is assumed in FIG. 3 that the mobile terminal 100 and the head unit 200 are connected through a wire or wirelessly to configure the VNC system.
Referring to FIG. 3, the head unit 200 generates state information by detecting a current state of the vehicle equipped with the head unit 200 in step S322. The head unit 200 transmits the state information to the mobile terminal 100 in step S324.
The head unit 200 detects the current state of the vehicle in every predetermined period of time in the second memory 208 and generate the state information according to a result of the detection. According to an embodiment of the present invention, the second communication interface 202 of the head unit 200 receives a request for the state information from the mobile terminal 100. When the second communication interface 202 receives the request for the state information from the mobile terminal 100, the second controller 220 of the head unit 200 controls the state detector 210 to generate the state information by detecting the current state of the vehicle.
The mobile terminal 100 compares the current state of the vehicle with a previous state of the vehicle based on the state information received from the head unit 200 in step S326. The mobile terminal 100 receives the state information from the head unit 200 in every pre-stored period and store the received state information in the first memory 130. The first controller 120 of the mobile terminal 100 compares the current state of the vehicle with the previous state of the vehicle by comparing state information received in a current period with state information received in a previous period.
The first controller 120 of the mobile terminal 100 determines whether the state of the vehicle is changed in step S328. When the state of the vehicle is changed as a result of the determination performed in step S328 (the “yes” decision line of step S328), the first controller 120 updates the application list in step S330. The first controller 120 updates the application list by changing the application list according to the changed state of the vehicle. The mobile terminal 100 transmits the updated application list in step S332. The mobile terminal 100 and the head unit 200 display the updated application list in step S336.
As described above, the mobile terminal 100 changes the content displayed through the first display unit 106 and the second display unit 206 of the head unit 200 according to the state of the vehicle.
When the state of the vehicle is not changed as the result of the determination performed in step S328 (the “no” decision line of step S328), the first controller 120 maintains the application list being displayed in the first display unit 106. Accordingly, the mobile terminal 100 may not perform any operation in particular. FIG. 4 is a flowchart illustrating a method of dynamically changing content displayed in a first display unit of the head unit by the mobile terminal included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention.
Referring to FIG. 4, the mobile terminal 100 receives the state information indicating the current state of the vehicle from the head unit 200 in step S342. The first controller 120 makes a request for the state information from the head unit 200 by controlling the first communication interface 102 and receive the state information. For example, the first controller 120 controls the first communication interface 102 to request the head unit 200 to transmit the state information when the mobile terminal 100 and the head unit 200 are connected to configure a virtual network or in every preset time.
The first controller 120 of the mobile terminal 100 determines the current state of the vehicle equipped with the head unit 200 based on the state information in step S344. The mobile terminal 100 determines whether the application list currently displayed in the first display unit 106 of the second display unit 206 corresponds to the current state of the vehicle in step S346. For example, when the vehicle is moving, the first controller 120 determines whether the application list displayed in the second display unit 206 corresponds to an application list displayed while the vehicle is moving in step S356. Similarly, when the vehicle is stopped, the first controller 120 determines whether the application list displayed in the second display unit 206 corresponds to an application list displayed while the vehicle is stopped.
When the application list corresponds to the current state as a result of the determination performed in step S346 (the “yes” decision line of step S346), the first controller 120 maintains the current application list in step S348. The mobile terminal 200 transmits the maintained application list to the head unit 200 in step S354 and display the application list through the first display unit 106 in step S356.
When the application list does not correspond to the current state as the result of the determination performed in step S346 (the “no” decision line of step S346), the first controller 120 determines applications corresponding to the current state of the vehicle in step S350. The first controller 120 determines the applications determined in step S350 as applications to be displayed in the first display unit 106 and the second display unit 206. Accordingly, the first controller 120 updates the application list in step S352.
When the application list is updated, the first controller 120 transmits the application list to the head unit 200 by controlling the first communication interface 102 in step S354. Further, the first controller 120 displays the updated application list by controlling the first display unit 106 in step S356.
FIG. 5 is a flowchart illustrating a method of dynamically changing content displayed in the second display unit of the head unit 200 included in the VNC system illustrated in FIG. 1, according to an embodiment of the present invention.
Referring to FIG. 5, the state detector 210 of the head unit 200 detects the current state of the vehicle in step S362. The state detector 210 periodically detects the state of the vehicle in every predetermined period of time.
The second controller 220 of the head unit 200 determines whether the state of the vehicle is changed based on a result of the detection performed in step S362 in step S364. When the state of the vehicle is not changed (the “no” decision line of step S364), the head unit 200 may not perform any operation in particular.
When the state of the vehicle is changed as the result of the determination performed in step S364 (the “yes” decision line of step S364), the state detector 210 generates the state information indicating the current state of the vehicle in step S366. Further, the second controller 220 identifies the application list currently displayed in the second display unit 206 in step S368.
The second controller 220 determines whether to change the application list displayed in the second display unit 206 in step S370. The second controller 220 compares the application list displayed in the second display unit 206 with an application list stored in the second memory 208 according to each state of the vehicle in step S370. When the state of the vehicle does not correspond to the application list displayed in the second display unit 206, the second controller 220 determines to change the application list.
When it is not required to change the application list as a result of the determination performed in step S370 (the “no” decision line of step S370), the second controller 220 maintains the application list currently displayed in the second display unit 206 in step S376. According to the embodiment of the present invention, since it is not required to change the application list, the second controller 220 controls to generate the state information by the state detector 210 is not transmitted to the mobile terminal 100.
When it is required to change the application list as the result of the determination performed in step S370 (the “yes” decision line of step S370), the head unit 200 transmits the state information to the mobile terminal 100 and makes a request for updating the application list in step S372. The head unit 200 makes a request for the application list by informing the mobile terminal 100 of the application list corresponding to the current state of the vehicle.
Next, the head unit 200 receives the updated application list from the mobile terminal 100 and then displays the received application list in step S374.
FIGS. 6A and 6B illustrate content displayed in the mobile terminal and the head unit illustrated in FIG. 1, according to an embodiment of the present invention.
FIG. 6A illustrates the content displayed in the mobile terminal 100 and the head unit 200 when the vehicle is stopped, and FIG. 6B illustrates the content displayed in the mobile terminal 100 and the head unit 200 when the vehicle is moving.
As illustrated in FIG. 6A, the first display unit 106 displays a first content, a second content, a third content, and a fourth content in the state where the vehicle is stopped. Further, the second display unit 206 of the head unit 200 having mirrored the first display unit 106 also displays the first content, the second content, the third content, and the fourth content. As one example, the third content among the above content is an application (e.g. DMB, dynamic image player, game and the like) which may distract the attention of the user driving the vehicle.
As illustrated in FIGS. 6A and 6B, when the vehicle is moving, the first controller 120 of the mobile terminal 100 removes the third content among content being displayed through the first display unit 106. Accordingly, the content being displayed in the first display unit 106 of the mobile terminal 100 corresponds to the first content, the second content, and the fourth content. Further, the second display unit 206 of the head unit 200 having mirrored the first display unit 106 also displays the first content, the second content, and the fourth content.
While the present invention has been described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.

## Claims

1. A method of dynamically changing content displayed in a head unit of a vehicle by a mobile terminal, the method comprising:
receiving state information indicating a current state of the vehicle equipped with the head unit from the head unit, wherein the content includes an application list including at least one application, the at least one application corresponding to a given state of the vehicle;
determining which of the content of the mobile terminal is to be displayed in the head unit based on the state information; and
transmitting the determined content to the head unit.

2. The method as claimed in claim 1, wherein determining the content to be displayed in the head unit based on the state information comprises:
determining whether a state of the vehicle is changed based on the state information; and
changing the content to be displayed in the head unit based on the state information, when the state of the vehicle is changed.

3. The method as claimed in claim 2, further comprising maintaining the content to be displayed in the head unit, when the state of the vehicle is not changed.

4. The method as claimed in claim 2, wherein transmitting the determined content to the head unit comprises transmitting the changed content based on the state information, to the head unit.

5. The method as claimed in claim 1, further comprising displaying the determined content by the head unit.

6. The method as claimed in claim 1, wherein the at least one application is further defined by at least two applications, each application of the at least two applications corresponding to a given state of the vehicle.

7. A mobile terminal comprising:
a communication interface configured to receive state information, indicating a current state of a vehicle equipped with a head unit, from the head unit; and
a controller configured to
determine which content of the mobile terminal is to be displayed in the head unit based on the state information, wherein the content includes an application list including at least one application, the at least one application corresponding to a given state of the vehicle; and
control the communication interface to transmit the determined content to the head unit.

8. The mobile terminal as claimed in claim 7, wherein the controller determines whether a state of the vehicle is changed based on the state information, and changes the content to be displayed in the head unit based on the state information, when the state of the vehicle is changed.

9. The mobile terminal as claimed in claim 8, wherein the controller determines to maintain the content to be displayed in the head unit, when the state of the vehicle is not changed.

10. The mobile terminal as claimed in claim 8, wherein the controller controls the communication interface to transmit the changed content based on the state information to the head unit.

11. The mobile terminal as claimed in claim 7, further comprising a display unit for displaying the determined content,
wherein the display unit and the head unit simultaneously display the determined content.

12. The mobile terminal as claimed in claim 7, wherein the at least one application is further defined by at least two applications, each application of the at least two applications corresponding to a given state of the vehicle.

13. A head unit comprising:
a state detector configured to detect a state of the vehicle and generate state information according to the detected state;
a communication interface configured to transmit the state information to a mobile terminal and receive content of the mobile terminal based on the state information, wherein the content includes an application list including at least one application, the at least one application corresponding to a given state of the vehicle; and
a display unit configured to display the at least one application.

14. The head unit as claimed in claim 13, further comprising a controller configured to determine whether the state of the vehicle is changed based on the state information, and controlling the communication interface to request the mobile terminal to transmit the content corresponding to the state information when the state of the vehicle is changed.

15. The head unit as claimed in claim 14, wherein the controller identifies the content being displayed through the display unit to determine whether to change the content when the state of the vehicle is changed, and controls the communication interface to request the mobile terminal to transmit the content corresponding to the state information when it is required to change the content.

16. The head unit as claimed in claim 13, wherein the at least one application is further defined by at least two applications, each application of the at least two applications corresponding to a given state of the vehicle.