Display apparatus and control method thereof, shutter glasses and control method thereof, and display system

Shutter glasses comprising:

• a lens which is operative to perform selective light transmission;
• a sensing unit which detects light emitted from a display apparatus;
• and
• a shutter controller which analyzes, from a result of detecting the light by the sensing unit, a turning on and off pattern of light corresponding to a non-display period during which an image frame is not displayed in the display apparatus, and controls an operation of the lens according to first information extracted from the analyzed turning on and off pattern of the light.

A method of controlling shutter glasses comprising a lens operative to perform selective light transmission, the method comprising:

• detecting light emitted from a display apparatus;
• analyzing, from a result of the detecting the light, a turning on and off pattern of light corresponding to a non-display period during which an image frame is not displayed in the display apparatus;
• extracting first information corresponding to the analyzed turning on and off pattern of the light;
• and
• operating the lens according to the extracted first information.

A display system comprising:

• a first display apparatus;
• and
• an external device which is configured to communicate with the first display apparatus,
• wherein the first display apparatus comprises:
• a first display panel;
• a first light source unit which generates light that is provided to the first display panel to display an image on the display panel;
• and
• a first light source driver which turns on and off the first light source unit based on a pattern corresponding to first information during a non-display period during which an image frame is not displayed on the first display panel, and
• wherein the external device comprises:
• an external device sensing unit which detects light emitted from the first light source unit of the display apparatus;
• and
• an external device controller which analyzes a turning on and off pattern of light detected by the external device sensing unit and extracts the first information from the analyzed turning on and off pattern of the light.