Data supply device, display system and data supply method

A display system comprising:

• a display device;
• and
• a data supply device adapted to supply the display device with video data,
• wherein the data supply device includes
• an input section adapted to receive input of the video data from an outside,
• a transmission section adapted to transmit the video data, input of which is received by the input section, via an electrical wave,
• a first control section adapted to switch an operation mode of the transmission section to either one of a first mode of searching for an optimum transmission direction of the electrical wave while transmitting the video data, and a second mode in which the transmission direction is fixed, and
• a notification section adapted to notify the display device of a fact that switching to the second mode has occurred in a case in which an operation mode of the transmission section has been switched from the first mode to the second mode, and
• the display device includes
• a reception section adapted to receive the video data while searching for an optimum reception direction of the electrical wave,
• a second control section adapted to fix the reception direction of the electrical wave in the reception section in a case in which the notification is received from the data supply device, and
• a projection section adapted to project a picture represented by the video data received by the reception section.