Patent ID: 7616187

Claim:
A three-dimensional (3D) display device comprising: a main body; a display which displays a 3D image; a camera which is mounted in the main body; a gyroscope which is mounted in the main body and senses a change in an angular velocity of the display; a calculation unit which calculates a first relative posture change amount of the display with respect to a viewing position based on an image of a user photographed by the camera and calculates a second relative posture change amount of the display with respect to the viewing position based on the change in the angular velocity sensed by the gyroscope; and a Kalman filter which receives the first and second relative posture change amounts calculated by the calculation unit and calculates a corrected posture change amount of the display, wherein when a relative position between the user and the display is changed, a user is able to view an image signal for a left eye and an image signal for a right eye in viewing regions where a right eye and a left eye of the user are positioned, respectively, without conversion of the image signal for the left eye to the image signal for the right eye, and the image signal for the right eye to the image signal for the left eye.