Patent ID: 7874685

Claim:
A projection system comprising: an information processing device for processing image information; a projector for modulating a light beam emitted from a light source device in accordance with the image information processed by the information processing device and enlargedly projecting the modulated light beam; and an information transfer section for connecting the information processing device and the projector to each other so as to communicate information, wherein the information transfer section includes an electric power transmission path capable of supplying electric power from a processing device power supply section of the information processing device to the projector, the projector includes a light source device; a cooling device for cooling internal heat generator, and a power generation section that supplies at least the cooling device with a drive voltage based on the electric power supplied via the electric power transmission path, and supplies the light source device with a drive voltage based on electric power supplied from an external power supply when electric power is supplied from both the electric power transmission path and the external power supply, the information processing device includes a cooling device control section for generating a control instruction for performing drive control of the cooling device and for outputting the control instruction to the cooling device via the information transfer section, the external power supply is removeably connected to the projector, and when the electric power supplied from the external power supply is blocked and the drive voltage supplied from the power generation section to the light source device is stopped, the power generation section supplies only the cooling device with the drive voltage based on the electric power supplied from the electric power transmission path.