Notification system, shutter glasses, notification method

A notification system comprising:

• a display apparatus;
• and
• one or more pairs of shutter glasses, each pair of shutter glasses comprising a right eye shutter and a left eye shutter,
• wherein the display apparatus comprises:
• a display module configured to display a 3D picture, and
• a transmitter configured to transmit control data to each of the pairs of shutter glasses, wherein the control data comprises shutter control data for controlling the right eye shutter and the left eye shutter of each of the pairs of shutter glasses, and
• wherein each of the pairs of shutter glasses further comprises:
• a receiver configured to receive the control data;
• a shutter controller configured to open and close the right eye shutter and the left eye shutter based on the shutter control data;
• and
• a notification module configured to provide a warning when a specific period of time has elapsed after the receiver receives the control data.