Display system with plural displays, display apparatus and display method thereof

A display method of displaying an image on a primary display and a secondary display based on a main image signal and a sub image signal, respectively, which are generated in a host apparatus, comprising:

• compressing the generated sub image signal;
• receiving the compressed sub image signal in the secondary display according to a general-purpose data communication standard;
• expanding the received sub image signal in the secondary display;
• and
• displaying an image based on the expanded sub image signal.

A display apparatus of a host apparatus that generates a main image and a sub image signal, comprising:

• a signal receiving part that receives the sub image signal generated by the host apparatus in a compressed format according to a general-purpose data communication standard;
• an expander that expands the compressed sub image signal received by the signal receiving part;
• and
• a displaying part that displays an image based on the image signal expanded by the expander.

A display apparatus of a host apparatus that generates a main image signal corresponding to a main image displayed on the display apparatus and a sub image signal corresponding to a sub image displayed on a secondary display, comprising:

• a signal receiving part that receives the main image signal generated by the host apparatus and receives the sub image signal generated by the host apparatus in a compressed format;
• a displaying part that displays an image based on the main image signal received by the signal receiving part;
• and
• a signal transmitting part that transmits the compressed sub image signal received by the signal receiving part to the secondary display according to a general-purpose data communication standard.

A display apparatus of a host apparatus that generates a main image signal corresponding to a main image displayed on the display apparatus and a sub image signal corresponding to a sub image displayed on a secondary display, comprising:

• a signal receiving part that receives the main image signal and the sub image signal, which are generated by the host apparatus;
• a displaying part that displays an image based on the main image signal received by the signal receiving part;
• a compressor that compresses the sub image signal received by the signal receiving part;
• and
• a signal transmitting part that transmits the sub image signal compressed by the compressor to the secondary display according to a general-purpose data communication standard.

A display apparatus capable of being connected to a host apparatus which generates an image signal displayable on the display apparatus comprising:

• a signal receiving part having a port for receiving an image signal generated by the host apparatus by utilizing a general purpose interface standard;
• a display driver that processes the received image signal to be displayed on a display part;
• and
• a display part for displaying the image signal in accordance with an output of the display driver.

A host apparatus for generating image signal comprising:

• an image signal generating part;
• a virtual graphics driver for processing the image signal generated by the image signal generating part;
• a port that transmits the processed image signal, the processed image signal capable of being viewed on an external display apparatus;
• and
• an port controller that controls the port to transmit the image signal;
• wherein a general purpose communication standard is utilized to transmit the image signal.