| 摘要 |
Disclosed is an image display device that can suppress deviations in the timing of the initiation and termination of the emission of a beam of light from a light source and that can improve image quality, which is equipped with a second optical detection unit that detects a scan timing detection beam emitted from the light source (20) when the scanning position of a scanning unit (50) is in a prescribed position in an ineffective scanning range in the main scanning direction (X), and that detects the scan timing by the scanning unit (50) for a beam of light in the main scanning direction (X). A control unit (10) corrects the initiation timing of the emission of an image formation beam in the main scanning direction (X) on the basis of the detection results from the second optical detection unit (93).
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