Interactive projection input and output device

An interactive projection input and output device, comprising:

• a projecting module, configured to display a screen mirroring content from an external device in a projection region of a projection picture corresponding to the external device;
• a coordinated operation capturing module, configured to:
• form a coordinated operation capture scope corresponding to the projection region;
• establish a first coordinate system within the coordinated operation capture scope;
• capture a user coordinated operation behavior occurring within the coordinated operation capture scope;
• and
• determine a first coordinate of a user coordinated operation point corresponding to the user coordinated operation behavior in the first coordinate system;
• a coordinated instruction generating module, configured to:
• obtain a relative position relationship between the user coordinated operation point and the projection region according to the first coordinate of the user coordinated operation point and regional position information of the projection region in the first coordinate system;
• and
• generate a position information instruction according to the relative position relationship;
• and
• a wireless transmission module, configured to:
• receive screen mirroring information from the external device through a downlink wireless connection, wherein the screen mirroring information comprises the screen mirroring content;
• and,
• send the position information instruction to the external device through an uplink wireless connection, such that an operating system of the external device calls an underlying drive program to execute the position information instruction, so as to achieve a control operation in response to the user coordinated operation behavior and thus operate the external device.