Abstract: A display apparatus, a user terminal and control methods thereof are provided. The display apparatus includes a signal receiver configured to receive a signal for one of a plurality of channels; a display configured to display an image of the one channel based on the received signal; a signal transmitter configured to transmit a signal to at least one user terminal; and a controller configured to, in response to the image being displayed on the display, control the signal receiver to broadcast a signal comprising channel information used for the at least one user terminal to receive additional information of the displayed image. With this, in providing the additional information of the image being displayed, user's convenience may be improved.

Abstract: A display apparatus, a remote controller and a control method thereof, the display apparatus including a first communication section which receives web page data including a plurality of link items, a receiving section which receives a video signal, a signal processing section which processes the web page data or the video signal, a display section which displays a web page corresponding to the processed web page data or a video corresponding to the processed video signal, and a control section which groups the plurality of link items included in the displayed web page into a predetermined number of groups, generates index information about the groups and the link items included in the groups, and displays first user selection icons corresponding to each group using the generated index information.

Abstract: Provided are a method and apparatus for providing a community widget at a first client device, the method including: receiving a client widget including authentication information from a server; searching a second client device in which the client widget is installed; performing mutual authentication with the second client device by using the authentication information; and transmitting, if the mutual authentication is successful, a community widget to the second client device.