Image display device

An image display device, comprising:

• a laser light source that emits a laser light;
• an optical unit that guides the laser light and projects the laser light onto a projection surface;
• a polarization switching unit that is provided in an optical path of the laser light and periodically switches the laser light between a first polarization direction and a second polarization direction alternatively;
• and
• a laser control unit that controls the laser light source in synchronization with the switching by the polarization switching unit, determines a first driving current corresponding to a grayscale to be displayed when the laser light is the first polarization direction, and determines a second driving current corresponding to the grayscale to be displayed when the laser light is the second polarization direction;
• wherein the optical unit projects the laser light of the first polarization direction and the laser light of the second polarization direction onto the projection surface, and
• the first driving current and the second driving current are set for the optical output of the laser light emitted from the polarization switching unit to become constant in a same grayscale, regardless of the switching between the first polarization direction and the second polarization direction.