Display apparatus for providing enhanced electronic program guide and method of controlling the same

1. A network device comprising:

a tuner configured to receive audio and video data of at least one broadcast program;

a network interface configured to receive at least one thumbnail image corresponding to each of the at least one broadcast program;

a user interface configured to receive a first command for executing an electronic program guide from a remote controller; and

a controller configured to output a signal for displaying the electronic program guide in response to the first command, wherein the electronic program guide comprises the at least one thumbnail image within a designated time zone,

wherein the controller is further configured to output a signal for displaying a specific thumbnail image within both of first and second designated time zones if a broadcast time is overlapped with the both of first and second designated time zones, further a size of the specific thumbnail image displayed within the first designated time zone is same as that of the specific thumbnail image displayed within the second designated time zone.

2. The network device of claim 1 , wherein the electronic program guide further comprises an indicator identifying the number of the at least one thumbnail image corresponding to each of the at least one broadcast program within the designated time zone.

3. The network device of claim 2 , wherein the indicator is changeable according to the number of the at least one thumbnail image, further the indicator corresponds to the number (N) of all thumbnail images within the designated time zone or N−1.

4. The network device of claim 1 , wherein the controller is further configured to output signal for displaying a schedule list tab for registering another specific broadcast program corresponding to another specific thumbnail image as a viewing scheduled broadcast program in a memory.

5. The network device of claim 4 , wherein the memory stores time information of the another specific broadcast program corresponding to the another specific thumbnail image in response to a second command from the remote controller.

6. The network device of claim 4 , wherein the controller is further configured to output signal for displaying a reminder message on the another specific broadcast program before the another specific broadcast program corresponding to the another specific thumbnail image starts.

7. The network device of claim 6 , wherein the reminder message asks whether or not a user wants to view the viewing scheduled broadcast program, further the controller is configured to switch a screen corresponding to the viewing scheduled broadcast program.

8. The network device of claim 5 , wherein an arrow indicator corresponding to the second command is movable within the electronic program guide depending on an input signal from a touch sensor or motion sensor of the remote controller.

9. The network device of claim 5 , wherein the time information comprises at least one of start time of the another specific broadcast program.

10. The network device of claim 1 , wherein the EPG comprises at least four designated time zones, further the EPG comprises a plurality of time zone options for changing the designated time zone.

11. The network device of claim 10 , wherein the designated time zone is changed to indicate another broadcast programs for a next four or 24 hours in response to selecting a first time zone option among the plurality of time zone options by the remote controller, further the first time zone option is closer to a right side than a second time zone option within the electronic program guide.

12. The network device of claim 11 , wherein the designated time zone is changed to indicate another broadcast programs for a previous four or 24 hours in response to selecting the second time zone option among the plurality of time zone options by the remote controller, further the second time zone option is closer to the left side than the first time zone option within the electronic program guide.

13. The network device of claim 4 , wherein the memory stores the another specific broadcast program if the smart television is in a stand-by state at the another specific broadcast program's start time.

14. The network device of claim 3 , wherein the electronic program guide further comprises an exit tab for returning to a former screen instead displaying the electronic program guide.

15. The network device of claim 13 , wherein the controller is further configured to output signal for displaying a first tab for accessing to the electronic program guide having the thumbnail image and a second tab for accessing to another electronic program guide having no thumbnail image.

16. A method of controlling a network device, the method comprising:

receiving audio and video data of at least one broadcast program, by a tuner;

receiving at least one thumbnail image corresponding to each of the at least one broadcast program, by a network interface;

receiving a first command for executing an electronic program guide from a remote controller, by a user interface; and

outputting signal for displaying the electronic program guide in response to the first command, wherein the electronic program guide comprises the at least one thumbnail image within a designated time zone,

wherein a specific thumbnail image is displayed within both of first and second designated time zones if a broadcast time is overlapped with the both of first and second designated time zones, further a size of the specific thumbnail image displayed within the first designated time zone is same as that of the specific thumbnail image displayed within the second designated time zone.