Mobile terminal, display device and controlling method thereof

A system, comprising:

• a display device having a second display unit for displaying a monitor window for displaying a monitor screen image;
• and
• a mobile terminal including a first display unit for displaying a mobile screen image and a controller, wherein the controller of the mobile terminal is configured to:
• interface to the display device,
• receive a control signal relating to a modification of the mobile screen image from the display device, wherein a housing of the mobile terminal is in a first orientation direction,
• control the mobile screen image to be modified in response to the control signal, even though the first orientation direction of the housing of the mobile terminal is not changed into a second orientation direction, and
• provide a modified mobile screen image to the display device,
• wherein the display device maintains the monitor window in the first orientation direction, even though an orientation direction of the mobile screen image is changed from the first orientation direction to the second orientation direction.

A method for displaying a mobile screen image in a mobile terminal, the method comprising:

• interfacing to an external display device having a second display unit for displaying a monitor window for displaying a monitor screen image;
• receiving a control signal relating to a modification of the mobile screen image from the external display device, wherein a housing of the mobile terminal is in a first orientation direction;
• controlling the mobile screen image to be modified in response to the control signal, even though the first orientation direction of the housing of the mobile terminal is not changed into a second orientation direction;
• and
• providing a modified mobile screen image to the external display device,
• wherein the external display device maintains the monitor window in the first orientation direction, even though an orientation direction of the mobile screen image is changed from the first orientation direction to the second orientation direction.