Apparatus, method and system for synchronization and 3D display apparatus using the same

A synchronization apparatus comprising:

• a power generator which generates power based on a received AC power signal;
• a detector which detects zero crossing points of time of the received AC power signal;
• and
• a controller which generates a reference signal for synchronizing timings of outputting images of a plurality of 3D display apparatuses based on the detected zero crossing points of time, and transmits the reference signal to the plurality of 3D display apparatuses,
• wherein the zero crossing points of time of the received AC power signal are points of time at which the AC voltage is 0V at a moment when the AC voltage changes from positive (+) to negative (−) or from negative (−) to positive (+), and
• wherein the controller outputs an image based on the generated reference signal.

A synchronization method, comprising:

• receiving an AC power signal;
• detecting zero crossing points of time of the AC power signal;
• generating a reference signal based on the detected zero crossing points of time;
• transmitting the reference signal to at least one display apparatus;
• and
• outputting an image based on the e generated reference signal,
• wherein the zero crossing points of time of the received AC power signal are points of time at which the AC voltage is 0V at a moment when the AC voltage changes from positive (+) to negative (−) or from negative (−) to positive (+).

A synchronization system comprising:

• a first display apparatus which generates a reference signal based on zero crossing points of time of a received AC power signal, and transmits the generated reference signal to a second display apparatus;
• and
• the second display apparatus which receives the reference signal and displays an image based on the received reference signal,
• wherein the zero crossing points of time of the received AC power signal are points of time at which the AC voltage is 0V at a moment when the AC voltage changes from positive (+) to negative (−) or from negative (−) to positive (+).

A synchronization system comprising:

• a synchronization apparatus comprising:
• a power generator which receives an alternating current (AC) power signal,
• a detector which detects zero crossing points of the AC power signal, and
• a controller which generates a reference signal corresponding to the detected zero crossing points;
• a first three-dimensional (3D) display device, comprising:
• a receiver which receives the reference signal,
• an image processor which outputs a processed image such that a timing of left-eye and right-eye portions of the output image correspond to the reference signal,
• wherein the zero crossing points of time of the received AC power signal are points of time at which the AC voltage is 0V at a moment when the AC voltage changes from positive (+) to negative (−) or from negative (−) to positive (+), and
• wherein the controller outputs an image based on the generated reference signal.