Projection screen, remote control terminal, projection device, display device, projection system and remote control method for projection system

A display device, comprising:

• a transceiver configured to acquire position information about a position irradiated by a light beam emitted by a remote control terminal and sensed by a photosensitive sensor on a projection screen, and receive an operation command from the remote control terminal;
• and
• a processor configured to determine a remote control region in accordance with the position information received by the transceiver, and perform a remote control operation in accordance with the operation command,
• wherein the processor is configured to:
• determine a display scale of a display content displayed by the display device and the display content displayed at a display region in accordance with the number of signal lines included in the display region of the projection screen and a resolution of the display device;
• determine a mapping relationship between a position of the display content displayed on the projection screen and a position of the display content displayed on the display device in accordance with the display scale;
• and
• determine whether or not the position irradiated by a light beam emitted from the remote control terminal and sensed by the photosensitive sensor is within a region covered by an icon or a widget displayed in the display content in accordance with the position information and the mapping relationship, if yes, determine the icon or widget as the remote control region, and if no, display a cursor at a position corresponding to the position irradiated by the light beam emitted from the remote control terminal and sensed by the photosensitive sensor, and determine a region covered by the cursor as the remote control region.