Patent ID: 7959303

Claim:
An image display device irradiating a projection plane with laser light for displaying an image on said projection plane, comprising: a laser receiving a driving signal and outputting said laser light with a quantity of light in accordance with a level of received said driving signal; an irradiation position control unit controlling a spot position on said projection plane to be irradiated with said laser light in accordance with image data; a position detection unit detecting a position of a spot of said laser light on said projection plane controlled by said irradiation position control unit; a quantity of light detection unit detecting a quantity of light of said laser light output by said laser; and a driving signal correction unit correcting a level of said driving signal, wherein said projection plane includes a projection region on which said image is projected when said laser receives said driving signal in accordance with image data and a non-projection region irradiated with said laser light when said laser receives said driving signal in accordance with prescribed data, said non-projection region is a region for said irradiation position control unit to move the spot of said laser light to said projection region, and when said position detection unit detects that a position of said spot exists in said non-projection region, said driving signal correction unit (i) detects a correlation between a quantity of light detected by said quantity of light detection unit and a level of said driving signal in accordance with said prescribed data and (ii) compares a detection characteristic value of said laser indicated by detected said correlation with a characteristic value at room temperature of said laser indicating a correlation between said quantity of light of said laser and a level of said driving signal at room temperature to correct the level of said driving signal in accordance with said image data based on a comparison result.