Projector and method of driving projector

A projector comprising:

• a light source configured to emit light;
• a light modulation device configured to modulate the light emitted from the light source according to an image signal;
• a projection optical device configured to project the light modulated by the light modulation device;
• a first driver configured to apply a voltage to the light modulation device and drive the light modulation device, the voltage having polarity inverted according to a predetermined drive frequency;
• and
• a second driver configured to supply a drive current to the light source and drive the light source in synchronization with the predetermined drive frequency,
• wherein the first driver is configured to drive the light modulation device to alternately provide a first polarity period in which the polarity of the voltage is first polarity and a second polarity period in which the polarity of the voltage is second polarity different from the first polarity,
• wherein the second driver is configured to drive the light source so that timings of switching related to the drive current coincide between the first polarity period and the second polarity period adjacent to the first polarity period, and
• wherein the timings of switching are different from each other between a first period and a second period,
• the first period containing one first polarity period and one second polarity period adjacent to the one first polarity period,
• the second period being adjacent to the first period, and
• the second period containing another first polarity period than the one first polarity period and another second polarity period than the one second polarity period, the another second polarity period being adjacent to the another first polarity period.