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A display apparatus has a communication unit which performs at least receiving of a plurality of pieces of display data. The display apparatus also has first storage device for storing received plurality of pieces of display data. The display apparatus further has a second storage unit for storing a

A display apparatus has a communication unit which performs at least receiving of a plurality of pieces of display data. The display apparatus also has first storage device for storing received plurality of pieces of display data. The display apparatus further has a second storage unit for storing at least one piece of first icon information corresponding to at least one of the pieces of display data and at least one piece of second icon information of a display form different from that of the first icon information. The display apparatus further has a display unit for displaying, on a menu screen, at least one of the first icon information and the second icon information. The display apparatus further has a control unit for selecting the first icon information or the second icon information based on the number of pieces of display data newly registered in the first storage unit and for controlling the displaying unit so that the selected icon information is displayed on the menu screen.

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A display apparatus has a communication unit which performs at least receiving of a plurality of pieces of display data. The display apparatus also has first storage device for storing received plurality of pieces of display data. The display apparatus further has a second storage unit for storing a

A display apparatus has a communication unit which performs at least receiving of a plurality of pieces of display data. The display apparatus also has first storage device for storing received plurality of pieces of display data. The display apparatus further has a second storage unit for storing at least one piece of first icon information corresponding to at least one of the pieces of display data and at least one piece of second icon information of a display form different from that of the first icon information. The display apparatus further has a display unit for displaying, on a menu screen, at least one of the first icon information and the second icon information. The display apparatus further has a control unit for selecting the first icon information or the second icon information based on the number of pieces of display data newly registered in the first storage unit and for controlling the displaying unit so that the selected icon information is displayed on the menu screen. rality of second clock signals based on a first clock signal; a frequency selector for selecting one of the plurality of second clock signals as a reference clock signal; a duty ratio controller for setting up the second duty ratio based on the reference clock signal; a first signal controller for generating a first signal for driving a first signal line based on the second duty ratio; and a display controller for synchronizing the duty ratio controller and the first signal controller. 3. The circuit of claim 2, wherein said first signal controller is a scan signal controller and the first signal line is a scan line. 4. The device of claim 3, wherein the controller further includes a data signal controller for converting a data by using masking in applying an additional scan time period remaining based on the second duty ratio to a particular scan line. 5. The circuit of claim 1, wherein the reference signal generator includes: a system interface for receiving a video signal and converting the video signal to a control signal and video data for display; a control circuit for fixing the first duty ratio in response to the control signal; and a memory for storage of the video data. 6. The circuit of claim 1, wherein the controller further includes a data controller for driving a portion or entire data corresponding to the scan lines applied and masking the rest of the data. 7. The circuit of claim 1, wherein the additional scan time period is applied to a single scan line. 8. The circuit of claim 1, wherein the additional scan time period is divided into a plurality of additional scan time periods, each being applied to a corresponding scan line for brighter luminance or the plurality of additional scan time periods being to a prescribed number of the plurality of scan lines, respectively. 9. The circuit of claim 1, wherein the plurality of additional scan time periods is adjusted through masking. 10. The circuit of claim 1, wherein the driver circuit includes: a data driver for applying video data from the controller to a plurality of data lines; and a scan driver for applying a driving signal based on the second duty ratio from the controller to a plurality of scan lines, for displaying at least one of image and text. 11. The driving circuit of claim 1, wherein the additional scan time period includes a number N of additional scan signals, where 1≤N