Patent ID: 8898704

Claim:
A display device, comprising: a broadcasting signal receiving unit configured to receive a broadcasting signal of a channel; a broadcasting signal separation unit configured to separate the broadcasting signal into video, audio, and data signals; a controller configured to determine whether data broadcasting is serviced from the channel, to compare data broadcasting received at a previous time point with data broadcasting received at a present time point from the channel when the data broadcasting is serviced from the channel, and to determine whether the data broadcasting received from the channel is updated according to a result of the comparison; a memory configured to store a first information on a channel on which the data broadcasting is serviced and a second information on a channel on which the data broadcasting is updated; and a display unit configured to display a data broadcasting information screen generated using the first information and the second information stored in the memory, wherein the controller is configured to determine that the data broadcasting received from the channel is not updated when the two data broadcastings are the same, and to determine that the data broadcasting received from the channel is updated when the two data broadcastings are different, wherein the broadcasting signal receiving unit sequentially receives and outputs broadcasting signals of an entire channel to a control signal of the controller, wherein the data broadcasting information screen includes a channel on which the data broadcasting is serviced and an indicator corresponding to whether the data broadcasting is updated, wherein the data signals include an Application Information Table (AIT), and the AIT includes a data service kind field that represents what kinds of broadcast programs are provided, the data broadcasting information screen further includes a plurality of service icons corresponding to the kinds of the broadcast programs, and the plurality of service icons represent what kinds of broadcast programs are provided from each channel.