Projection device and method for controlling projection device

A projection device comprising:

• a projection unit including
• an image light forming unit configured to form image light, and
• a projection optical system configured to project, toward a projection target, the image light formed by the image light forming unit;
• an image-capturing unit including an imaging element configured to receive light through the projection optical system and configured to capture an image of a range including the projection target to generate a captured image;
• a communication unit;
• and
• a control unit configured to transmit the captured image to an information processing device by the communication unit, cause the communication unit to receive a reception image including an image drawn by the information processing device, and cause the projection unit to project the reception image,
• wherein the image-capturing unit performs image capturing by receiving light focused by a lens included in the projection optical system,
• wherein the projection optical system includes a separation optical member configured to separate light incident from the projection target from the image light and guide the separated light to the imaging element.

A method for controlling a projection device that includes a projection unit configured to project image light to a projection target, an image-capturing unit configured to capture an image of a range including the projection target to generate a captured image, and a communication unit configured to communicate with an information processing device, the method comprising:

• by the communication unit, transmitting the captured image generated by the image-capturing unit as a first image to the information processing device and receiving a second image including a first drawing image drawn relative to the first image in the information processing device;
• by the projection unit, projecting the first drawing image to the projection target;
• by the image-capturing unit, capturing the image of the range including the projection target to which the first drawing image is projected to generate the captured image;
• by the communication unit, transmitting the captured image as a third image to the information processing device and receiving a fourth image including a second drawing image drawn relative to the third image in the information processing device;
• and
• by the projection unit, projecting the first drawing image and the second drawing image to the projection target.