Image display apparatus and method for operating the same in 2D and 3D modes

An image display device comprising:

• a pointing device configured to receive a power on input, wherein the pointing device comprises a radio transceiver, an input portion including a power on button for the power on input, and a sensor portion including a gyro sensor and an acceleration sensor for sensing movement information of the pointing device;
• an interface including an infrared (IR) module and a radio frequency (RF) module and configured to:
• receive, through the IR module, an IR signal corresponding to the power on input from the pointing device,
• receive, through the RF module, a pointing signal from the pointing device after establishing radio frequency (RF) communication between the pointing device and the image display device after the image display device is powered on, selection of a two-dimension (2D) mode and a three-dimension (3D) mode,
• receive, through the RF module, a pointing signal from the pointing device after establishing communication between the pointing device and the image display device after the image display device is powered on, wherein the pointing signal comprises the movement information of the pointing device, and
• receive, through the RF module, a signal from the pointing device for moving the selectable area using the pointer on the display;
• a display;
• and
• a controller configured to:
• power the image display device on based on the IR signal,
• establish radio frequency (RF) communication between the pointing device and the image display device after the image display device is powered on,
• display a selectable area and a pointer based on the pointing signal, the selectable area movable in first, second, and third directions, the third direction being perpendicular to the first and second directions,
• move the pointer and the selectable area only in the first or second direction, excluding the third direction, in response to the selection of the 2D mode and the signal, and
• move the selectable area in the third direction and ignore movement of the selectable area in the first and second directions, in response to the selection of the 3D mode and the signal,
• wherein in the 3D mode, the controller is further configured to change a disparity between a left-eye image and a right-eye image including the selectable area based on the third direction information among movement information from the pointing device such that the depth of the selectable area is changed, and
• wherein in the 3D mode, if the pointer is moved into the selectable area, the controller is further configured to change a shape of the pointer to a shape representing that the pointer is movable in the third direction.