Patent ID: 8235535

Claim:
A projector which modulates light emitted from a light source and projects the modulated light, comprising: a light source drive device which includes a light source drive unit for driving the light source and a light source control unit for controlling operation of the light source drive unit; and a control unit which includes a first communication unit connected with the light source control unit and a second communication unit connected with the light source drive unit, and allows the light source control unit to control operation of the light source drive unit by outputting a control command from the first communication unit, wherein the light source control unit: controls operation of the light source drive unit based on the control command, receives, from the light source drive unit, at least one of a light emission luminance and a lighting condition of the light source detected by the light source drive unit, and outputs, to the control unit, a response corresponding to the at least one of the light emission luminance and the lighting condition of the light source, and wherein the control unit: determines whether the light source control unit has normally controlled the operation of the light source drive unit in accordance with the control command based on the response received from the light source control unit, and outputs control information from the second communication unit to directly control the light source drive unit when it is determined that the light source control unit has not normally controlled the operation of the light source drive unit.