Patent ID: 8289454

Claim:
A signal conversion device that supplies a video signal to each video projection device of plural video projection devices that display a video image by superimposing the projection image, the device comprising: a characteristic information transmitting unit that transmits, to at least one video projection device of the plural video projection devices, characteristic information representing a light modulation characteristic of a light modulation element provided in the at least one video projection device; and a signal conversion processing unit that performs signal conversion processing corresponding to each of the video projection devices to an input video signal in accordance with the characteristic information transmitted from the characteristic information transmitting unit, and supplies the video signal after the signal conversion processing to each of the video projection devices, wherein the signal conversion processing unit transmits the video signal independently from the characteristic information transmitting unit transmitting the characteristic information, and wherein the characteristic information is transmitted to the first and second video projection devices prior to the video signal.