Patent ID: 8395649

Claim:
A projector that can function as a node in a tree structural network comprising: a projecting section; a conference management section providing a conference management function; a storage section that stores parent-child information that indicates a direct parent and a direct child in the network; a data controller that uses the projecting section to project an image corresponding to image data and sends the image data to the direct child indicated in the parent-child information when receiving the image data from the direct parent indicated in the parent-child information; a change section that, when receiving a switching request to make a request to switch a parent-child relationship from the direct child, sends the switching request to the direct parent, and that, when receiving permission information representing permission to switch from the direct parent, sends the permission information to the direct child that sent the switching request and changes the parent-child information so that the direct parent becomes the direct child, and the direct child that sent the switching request becomes the direct parent; and a setting section that sets the projector which is connected directly to a presenter as a conference master.