Calibration device, image display system and shutter glasses

An image display system comprising:

• shutter glasses provided with a shutter for each lens, a light sensor arranged in a position to receive transmitted light of at least one lens, a first communication section, and a control section which controls driving of the shutters;
• and
• a display device provided with a display section, a signal generating unit which generates an image signal displayed in the display section, and a second communication section,
• wherein the display device switches and displays images for each lens in a time sharing manner, and sends a standard pulse which shows a timing of the switching of the images from the second communication section, and
• the control section of the shutter glasses determines an appropriate correction amount τ of the timing of the opening and closing of the shutters for each lens based on a phase difference between the output signal of the light sensor and the standard pulse received by the first communication section.

Shutter glasses comprising:

• a lens;
• a shutter attached for each lens;
• a rim supporting the lens;
• a temple attached to the rim so as to be foldable;
• a light sensor arranged at an inner side of at least one temple in a folded state so as to receive transmitted light of at least one lens;
• a signal processing section which processes an output signal from the light sensor;
• a communication section which communicates with a display device which displays images on a screen;
• a processing section which determines a timing of opening and closing of the shutters;
• a shutter driving section which operates the shutters of the shutter glasses to open and close in accordance with the timing of the opening and closing of the shutters determined by the processing section;
• and
• while the temple is folded and the light sensor receives transmitted light of at least one lens, the processing device determines an appropriate correction amount τ of the timing of the opening and closing of the shutters based on a phase difference between the output signal of the light sensor and the standard pulse.