Patent ID: 7537351

Claim:
A projection system comprising: a projector that modulates the light emitted from a light source according to image information to form an optical image and projects the image in a magnified form; and a computer connected to the projector via a signal input and output terminal, wherein the projector projects the image according to the image information output from the computer; wherein the projector includes: an adjustment operation section that adjusts the settings on the projector; an adjustment operation identification section that identifies the adjustment operation indicated by an adjustment operation signal output from the adjustment operation section; an adjustment-signal generating section that generates an image adjustment signal on the basis of the adjustment operation identified by the adjustment operation identification section; and a two-way communication section that sends the generated image adjustment signal to the computer, and receives a signal from the computer; and the computer includes: a two-way communication section that receives the image adjustment signal from the projector, and sends a signal; and an image processor that processes an image signal to be output, according to the received image adjustment signal.