Patent Publication Number: US-11395043-B2

Title: Display control apparatus and method in a mobile terminal capable of outputting video data to an external display device

Description:
PRIORITY 
     This application is a continuation of prior application Ser. No. 13/242,856, filed Sep. 23, 2011, which is a continuation of prior application Ser. No. 11/784,414, filed Apr. 6, 2007, which has issued as U.S. Pat. No. 8,644,883 on Feb. 4, 2014 and claimed the benefit under 35 U.S.C. § 119(a) of a Korean patent application filed in the Korean Intellectual Property Office on Apr. 17, 2006 and assigned Serial No. 10-2006-0034719, the entire disclosure of each of which is hereby incorporated by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to a display apparatus and method in a mobile terminal, and in particular, to a display control apparatus and method in a mobile terminal capable of outputting video data to an external display device in order for a user to enjoy concurrent service. 
     2. Description of the Related Art 
     Along with the development of digital broadcasting technology and mobile telecommunication technology in recent years, the public has taken great interest in digital broadcasting services that enable users to watch digital broadcasts on mobile terminals, even when the user is in motion. Due to the great interest in the digital broadcasting services, the focus of the development has been moving from a passive broadcasting watching scheme that users watch merely TV programs without taking any action to an active broadcasting management scheme that allows users to see a variety of information related to goods displayed on a TV program currently being broadcast. For example, the active broadcasting management scheme allows a user to purchase goods displayed on a TV program while watching the TV program. 
     Also, a concern is being raised as to Digital Multimedia Broadcasting (DMB) services through wireless mobile terminals. The current DMB services make connections available anywhere and anytime with the mobile terminals, but they are disadvantageous in that the small screen size of the mobile terminals do not allow a number of people to simultaneously watch a TV program displayed on the screen of the mobile terminal. Thus, the trend is for developing the mobile terminal to have a function to output video signals to external display units, such as a television, a projector and the like, having a screen size larger than that of the mobile terminal. The mobile terminal having TV-out function can output video data including moving pictures and broadcasting data, currently being displayed on the screen of the mobile terminal, to an external display device. Therefore, users are able to simultaneously watch TV programs through the larger screen. 
     Hereinafter, an example of a mobile terminal connected with a television will be provided with reference to  FIG. 1 .  FIG. 1  illustrates a conventional mobile terminal having TV-out function, connected with a television. As shown in  FIG. 1 , a mobile terminal  10  is connected with a television  30 , which is a type of external display device, through a TV-out cable  20 . As shown in  FIG. 1 , a broadcast including a TV program is displayed on the screen of the television  30  rather than being displayed on the screen of the mobile terminal  10 . Generally, as in the screen display control scheme of the mobile terminal  10 , the television  30  displays broadcasts on the screen under the same display scheme. Thus, when events including incoming call and message reception occur while watching TV programs, an event message box indicated by reference numeral  40  in  FIG. 1  is displayed on the screen of the television  30 . However, as shown in  FIG. 1 , the event message box  40  covers some portion of the screen on which broadcast is being currently displayed. More specifically, when a number of people are watching a TV program through the television  30 , viewers may feel inconvenienced by the unnecessary information displayed on the screen. 
     In addition, personal information of the mobile terminal user is undesirably publicly displayed, creating a potential infringement on the user&#39;s privacy. Further, when a user is checking information related to goods desired by the user while viewing a home shopping channel, i.e., when the user clicks on the user-desired goods, personal information required by a purchase may be unintentionally disclosed to the public. 
     As described above, a display control scheme of an external display device in a conventional mobile terminal has a problem in that some portion of the displayed TV screen will be obscured by an event message box  40  or personal information may be undesirably disclosed to the public. Thus, the conventional display control scheme is not suitable for processing the concurrent service in an external display device and in a mobile terminal. Such a conventional mobile terminal cannot offer a user who is watching broadcasts through the external display device other kinds of services because in a conventional mobile terminal, only one screen for the service currently being displayed can be provided to an external display device. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention provides a display control apparatus and method in a mobile terminal having a function to output video data to an external display device that enables users to enjoy a variety of services in a mobile terminal separately from services offered by an external display device connected with the mobile terminal. 
     In addition, the present invention provides a display control apparatus and method in a mobile terminal having a function to output video data to an external display device that enables event processing in the mobile terminal, in addition to a service currently being displayed on the external display device. 
     Further, the present invention provides a display control apparatus and method in a mobile terminal having a function to output video data to an external display device that prevents personal information from being publicly disclosed. 
     According to one aspect of the present invention, there is provided a display control method in a mobile terminal capable of outputting video data to an external display device. The method includes transmitting, by the mobile terminal, video data to be displayed on the external display device, determining whether an event occurs during displaying the video data on the external display device and upon occurrence of an event, displaying a screen for processing the event on the mobile terminal. 
     According to another aspect of the present invention, there is provided a display control apparatus in a mobile terminal capable of outputting video data to an external display device. The apparatus includes a radio unit for receiving an outside event, a controller for transmitting the video data through an interface to display the video data on the external display device and configuring a screen for processing an event when an event is notified from the radio unit; and a display for displaying the screen for processing the event under the control of the controller. 
     According to further aspect of the present invention, there is provided a display control apparatus in a mobile terminal capable of outputting video data to an external display device. The apparatus includes a Digital Multimedia Broadcasting (DMB) receiver for receiving broadcasting data received from digital broadcasting station in real time, a controller for transmitting the broadcasting data to the external display device through an interface to display the broadcasting data and upon occurrence of the event, configuring a screen for processing an event after determining whether an event occurs, and a display for displaying the screen for processing the event under the control of the controller. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of certain exemplary embodiments of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which: 
         FIG. 1  illustrates a conventional mobile terminal having TV-out function, connected with a television; 
         FIG. 2  is a block diagram illustrating a mobile terminal having TV-out function according to the present invention; 
         FIG. 3  illustrates screens in a mobile terminal and in an external display device, respectively, when an event occurs according to the present invention; 
         FIG. 4  is a block diagram illustrating a mobile terminal having TV-out function according to another embodiment of the present invention; 
         FIG. 5  illustrates display of a broadcasting service and an Electronic Program Guide (EPG) service according to another embodiment of the present invention; and 
         FIG. 6  illustrates display of different broadcasting services according to another embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Preferred embodiments of the present invention will now be described in detail with reference to the annexed drawings. For convenience, the same reference numerals are used to represent the same functional parts. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. 
     The present invention implements a specific function that enables a user to enjoy other services in a mobile terminal while watching video data including broadcasts or using services displayed on an external display device connected with the mobile terminal. To accomplish the above function, the present invention performs the procedure of determining whether events occur while displaying video data sent by the mobile terminal on the external display device, and when it is determined that an event occurs, displaying a screen for processing the event on the mobile terminal. Thus, a user is able to use a concurrent service by using the other kind of service in a mobile terminal while continuing to watch broadcasts or enjoy a service displayed on the external display device. In addition, when an event occurs, information relevant to the event is displayed only on the mobile terminal, irrespective of the displayed screen of the external display device. Therefore, a user&#39;s personal information can be protected from disclosure to the public. 
     The following description is for the operation of the mobile terminal having a TV-out function. The mobile terminal transmits video data to external display devices, such as a television and a computer monitor, through a cable and allows the video data to be displayed on the external display device. Herein, the video data transmitted to the external display device is compressed and converted to be suitable for the external display device, as well known to those skilled in the art. 
     The present invention includes a method of distinguishing the content of the external display device from the content of the mobile terminal and displaying each content individually on its associated screen. According to the present invention incoming call and message reception events may be processed through the screen of the mobile terminal, separately from the service provided to the external display device. Also, according to another embodiment of the present invention, while the external display device is displaying video data, the mobile terminal can display another screen for providing another service. Herein, the video data displayed on the external display device may be broadcast data provided in real time by a digital broadcasting station or moving pictures previously stored in the mobile terminal. 
     Elements and operation of a mobile terminal to which the present invention is applied will be described with reference to  FIG. 2 .  FIG. 2  is a block diagram illustrating a mobile terminal having TV-out function according to the present invention. Referring to  FIG. 2 , a mobile terminal  100  is connected with any one of external display devices  200  through an interface  210 . The mobile terminal  100  comprises a controller  110 , a Digital Multimedia Broadcasting (DMB) receiver  120 , a radio unit  130 , a display unit  140  and a memory  150 . Herein, techniques for the connectivity between the mobile terminal  100  and the external display devices  200  can be achieved using cable, infrared data communication, Bluetooth™ (herein “Bluetooth”), USB, IEEE 1394, Zigbee, W-LAN, etc. Thus, in the present invention, the mobile terminal  100  enables data transmission via interface  210  without physically being connected with the external display devices  200  through a cable. 
     The DMB receiver  120  receives broadcasting data through an antenna and then demultiplexes Transport Stream packets (hereinafter, referred to as TS packet) to thereby parse the broadcasting data into video and audio data through decoding. The video and audio data are then output to a screen and a speaker of the external display devices  200 , respectively, through interface  210  under the control of the controller  110 . Herein, a tuner and a decoder for performing demultiplexing and decoding can be incorporated into the DMB receiver  120 , the operation of which are known to those skilled in the art. 
     The radio unit  130  transmits/receives Radio Frequency (RF) signals to/from a base station through an antenna under the control of the controller  110 . Especially, the radio unit  130  provides notification of event occurrence such as an incoming call, message reception, etc, to the controller  110 . Thus, in the present invention, when the radio unit  130  provides notification of an event occurrence during display of video data sent by the controller  110  on the external display devices  200 , the controller  110  configures a screen for processing the received event and displays the screen on the display unit  140 . As such, the display unit  140  displays a variety of information including caller&#39;s information and the detailed contents of the received message in accordance with the notified event. 
     In addition, the display unit  140  receives and displays display data relative to key input data input by a key input unit (not shown) under the control of the controller  110 , and allows a user to visually confirm its condition in setting or activating functions desired by the user. The display unit  140  can also display event contents received during a broadcasting service being offered, other broadcasts provided by other channels in addition to the broadcasts currently displayed on the external display device  200  and broadcasting information including EPG information under the control of the controller  110 . 
     The memory  150  stores a variety of information relevant to entire operation of the mobile terminal  100  and at the same time, information relevant to broadcasting service including Electronic Program Guide (EPG) information received under the control of the controller  110 . 
     The controller  110  determines whether event occurrence is notified by the radio unit  130  while transmitting and displaying video data on the external display device  200 . When the event occurrence notification is provided by the radio unit  130 , the controller  110  outputs the contents of the notified event on the display unit  140  of the mobile terminal  100  while continuing to display video data on the external display device  200 . 
       FIG. 3  shows screens displayed respectively in a mobile terminal and in an external display device when an event occurs according to the present invention. Referring to  FIG. 3 , it is illustrated, by way of example, that upon receipt of an incoming call, a message notifying of the occurrence of an event, which is indicated by reference numeral  220 , is presented at the bottom of the screen of the external display device  200  on which video data is being currently displayed and caller&#39;s information relevant to the event is displayed on the screen of the mobile terminal  100 . That is to say,  FIG. 3  shows that upon receipt of an incoming call during displaying video data including broadcasting data, the controller  110  distinguishes the contents of an event from video data and then displays the event data on the mobile terminal  100  and the video data on the external display device  200 . 
     Herein, it is preferred that a message indicated by reference numeral  220  is placed on the bottom of the screen of the external display device  200  so that a screen on which video data is currently displayed may overlap only a slight portion of the lower end of the screen, allowing a user to continue to watch the video data currently being displayed without any inconvenience. The reason why the message is located at the bottom of the screen is to prevent user&#39;s inconvenience while watching TV programs, but of course the message can be placed at other positions. Also, to achieve the object of the present invention for protecting user&#39;s privacy, it may be possible that the external display device  200  presents only the event-notifying message, while the specific contents of the event including caller&#39;s information and details of the message are displayed only on the mobile terminal  100 . Herein, the event-notifying message can be placed at any location on the screen. However, it is preferable that the event-notifying message has to be placed at the edge of the screen to avoid user inconvenience while watching TV programs. The message may function simply as an event-notifying message but may further include brief information including a telephone number and an emergency message relative to the event. Herein, it is preferable that the limited information that is included in the event-notifying message displayed on external display device  200  does not infringe on the user&#39;s privacy. 
     As described above, it is advantageous in that upon receipt of the event including incoming call and message reception, the details of the received events such as caller information and the contents of the message are displayed on the mobile terminal, separately from the operation of displaying video data on the external display device  200 , thus avoiding public display of user&#39;s personal information and protection of user&#39;s privacy. 
     The TV program displayed in  FIG. 3  is provided as an example, and the present invention is not limited to this. In other words, a variety of video data including moving pictures stored in the mobile terminal  100  and broadcasting data received through the DMB receiver  120  can be displayed on the screen of the external display device  200 . In addition, all kinds of mobile terminals including TV-out function but not having a feature of receiving broadcasting data can also be applied to the mobile terminal  100  of the present invention besides mobile terminals capable of receiving broadcasting data. 
     A description will be now made of constituent elements of the mobile terminal and their operation with reference to  FIG. 4 .  FIG. 4  is a block diagram illustrating a mobile terminal having TV-out function according to the present invention and, more specifically, in  FIG. 4 , the DMB receiver  120  shown in  FIG. 2  is replaced with a Digital Multimedia Broadcasting (DMB) tuner  400  and a Digital Multimedia Broadcasting (DMB) decoder  410 . The DMB tuner  400  that is connected in parallel to the DMB decoder  410  through two RF paths processes two kinds of terrestrial ensembles or simultaneously receives both terrestrial DMB broadcasting and satellite DMB broadcasting. If a DMB tuner that enables reception of two terrestrial DMBs or two satellite DMBs may be implemented, then the controller can process terrestrial DMB and satellite DMB in combination and provide concurrent service. 
     The DMB decoder  410  receives at least one broadcasting data that is input by DMB tuner  400  in parallel and transmits the data to the controller  110  through two paths. Herein, one path is connected to the display unit  140  and the other path is connected to the external display device  200  under the control of the controller  110 . As shown in  FIG. 2 , the mobile terminal  100  is connected with the external display device  200  through the interface  210 . Accordingly, each broadcasting data having been displayed on the external display device  200  by separating a main screen and a sub screen will be displayed, respectively, on either the screen of the mobile terminal  100  or the external display device  200  after being separated. For instance, it may be possible that through one path, broadcasting data on the currently selected channel is output to the external display device  200  and, through another path, different broadcasting data on the other channel excepting the currently selected channel is output to the display unit  140 . That is, while continuing to display TV programs on the currently selected channel on the main screen of the external display device, other TV programs that have been displayed on the sub screen are displayed on the screen of the mobile terminal  100 . 
     As described above, two RF paths connecting from the DMB tuner  400  to the controller  110  are provided and thus it is possible to display different broadcasting data respectively on the external display device  200  and the mobile terminal  100  after being separated. In addition, it is also possible to display EPG service on the mobile terminal  100  while displaying a broadcast on the external display device  200 . Generally, during displaying broadcasts on the external display device  200 , the screen of the mobile terminal is blocked. However, according to a preferred embodiment of the present invention, EPG service can be enjoyed through the mobile terminal  100  regardless of displaying broadcasts on the external display device. Herein, the EPG service informs a user of what is playing on what channel and provides rich program descriptors, which will describe the program/movie plot, start time, duration, actors, directors and genre. 
     Accordingly, using the present invention, a user can conveniently enjoy the EPG service, without discontinuing broadcasts currently being displayed on the external display device  200 . That is, without having to close the current broadcasting display scheme, a user may access EPG service through the mobile terminal  100  while continuing to watch broadcasts being displayed on the external display device  200 , thereby allowing enjoyment of concurrent service without limitation. 
       FIG. 5  illustrates display of a broadcasting service and the Electronic Program Guide (EPG) service according to the present invention. More specifically, in  FIG. 5 , it is illustrated that pursuant to a user&#39;s request for the EPG service, while continuing to display broadcasts on the external display device  200 , information about the EPG service is displayed on the screen of the mobile terminal  100 .  FIG. 6  illustrates display of different broadcasting services according to the present invention. In  FIG. 6 , the currently selected TV program is being displayed on the external display device  200  whereas information regarding different TV programs provided on other channels is being displayed on the screen of the mobile terminal  100 . 
     Although the above description focuses on display of a received broadcasting service, it is understood that the present invention can also be applied to display of video data stored in the mobile terminal  100  on the external displaying device  200 . Alternatively, in a mobile terminal having a projection function, it is possible to divide the projected screen and the screen of the mobile terminal and then display them separately. 
     As can be understood from the foregoing description, according to the present invention, when an event occurs during displaying video data of the mobile terminal on the external display device, the mobile terminal processes the event and allows a user to continue to watch the video data currently being displayed on the external display device without limitation. 
     In addition, the present invention is advantageous in that, since detailed information about events including call incoming and message reception is only displayed on the screen of the mobile terminal, and not displayed on the screen of the external display device, a user&#39;s privacy can be fully protected. 
     While the invention has been shown and described with reference to a certain preferred embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.