Control method, projection device, and control program

A control method performed by a control device of a projection device including a body part including a light source and a first cooling device, a head part including a light valve, a projection lens, a second cooling device, and a first temperature sensor, and a light transmission unit that transmits light output from the light source to the head part, in which a housing of the body part and a housing of the head part are connected to each other through the light transmission unit, the head part including a first temperature sensor that includes a temperature sensor of the light valve, the control method comprising:

• controlling, by a processor of the control device, a set value of the second cooling device and an output power of the light source based on a temperature measured by the first temperature sensor;
• and
• controlling, by the processor, an output power of the light source based on correspondence information between a change in the output power of the light source and a change in a temperature measured by the temperature sensor of the light valve.

A non-transitory computer-readable storage medium storing a control program for a projection device including a body part including a light source and a first cooling device, a head part including a light valve, a projection lens, a second cooling device, and a first temperature sensor, and a light transmission unit that transmits light output from the light source to the head part, in which a housing of the body part and a housing of the head part are connected to each other through the light transmission unit, the head part including a first temperature sensor that includes a temperature sensor of the light valve, the control program causing a processor of the projection device to execute processing of:

• controlling a set value of the second cooling device and output power of the light source based on a temperature measured by the first temperature sensor;
• and
• controlling the output power of the light source based on correspondence information between a change in the output power of the light source and a change in a temperature measured by the temperature sensor of the light valve.