Main image processing apparatus, sub image processing apparatus and control method thereof

A sub image processing apparatus communicating with a main image processing apparatus, the sub image processing apparatus comprising:

• a communication unit which communicates with the main image processing apparatus;
• an image processing unit which processes contents;
• a display unit which displays the processed contents;
• a user input unit which receives a user touch input;
• and
• a controller which determines which at least one of contents corresponds to a touched area of the user touch input, senses a change in location of the user touch input, and controls the communication unit to transmit a control command for the at least one of the contents to the main image processing apparatus in response to the sensed change in the location of the user touch input.

A main image processing apparatus communicating with a sub image processing apparatus, the main image processing apparatus comprising:

• a communication unit which communicates with the sub image processing apparatus;
• an image processing unit which processes contents;
• a display unit which displays the processed contents;
• and
• a controller which receives a control command for at least one of the contents from the sub image processing apparatus, and controls the image processing unit to display the at least one of the contents changed based on the received control command.