Display device and driving method thereof

A method of driving a display device, the method comprising:

• selectively activating a plurality of pixels to display images in accordance with input video signals and input image control signals;
• reading the input video signals to generate an on-pixel signal having information about a ratio of a number of the active pixels to a total number of the pixels per each frame;
• determining a ratio range from among first ratio ranges corresponding to the ratio of the number of the active pixels to the total number of the pixels and defining a plurality of kinds of sound;
• determining one of the kinds corresponding to the on-pixel signal;
• and
• generating a sound output instruction signal corresponding to the determined kind,
• wherein the input image control signals comprise a vertical synchronization signal, and the reading of the input video signals is further to generate a sound output start signal in synchronization with the vertical synchronization signal.

A display device including a display unit having a plurality of pixels to display images according to input video signals and input image control signals, the display device comprising:

• a signal controller for determining a number of activated pixels per each frame displayed on the display unit from among the plurality of pixels according to the input video signals, and generating a sound output start signal;
• and
• a sound controller for generating a sound output instruction signal according to the number of activated pixels and controlling a sound of the display device according to the sound output instruction signal,
• wherein the input image control signals comprise a vertical synchronization control signal, and the signal controller is configured to generate the sound output start signal in synchronization with the vertical synchronization signal.

A display device including a display unit having a plurality of pixels to display images according to input video signals and input image control signals, the display device comprising:

• a signal controller for determining a number of activated pixels per each frame displayed on the display unit from among the plurality of pixels according to the input video signals, and generating a sound output start signal;
• and
• a sound controller for generating a sound output instruction signal according to the number of activated pixels and controlling a sound of the display device according to the sound output instruction signal,
• wherein the sound comprises a plurality of sounds according to first ranges corresponding to the number of activated pixels per each frame.

A method of controlling a sound of a display device, comprising:

• determining a number of activated pixels for a frame displayed on a display unit of the display device according to input video signals;
• generating a sound output instruction signal according to the number of activated pixels;
• and
• controlling the sound of the display device according to the sound output instruction signal,
• wherein the determining of the number of activated pixels comprises calculating an on-pixel ratio of the number of activated pixels for the frame compared to a total number of pixels of the display unit.

A method of controlling a sound of a display device, comprising:

• determining a number of activated pixels for a frame displayed on a display unit of the display device according to input video signals;
• generating a sound output instruction signal according to the number of activated pixels;
• and
• controlling the sound of the display device according to the sound output instruction signal,
• further comprising outputting the sound corresponding to the sound output instruction signal in accordance with a sound output start signal.