Patent ID: 8164621

Claim:
An image display device displaying an image by a scanned light comprising: a light source part which includes a light source for radiating a light having intensity corresponding to a supplied electric current; an optical scanning part which is configured to perform two-dimensional scanning of the light radiated from the light source; a drive control part which is configured to sequentially supply an electric current corresponding to an image signal to the light source when a scanning position of the light by the optical scanning part falls within an effective scanning range so as to allow the light source to sequentially radiate image forming light, and is also configured to supply an electric current to the light source when the scanning position of the light by the optical scanning part falls at a predetermined position outside the effective scanning range so as to allow the light source to radiate inspection-use light; a light detecting part which is arranged at a predetermined position within a scanning range of the light by the optical scanning part and outside the effective scanning range; and a light blocking part which is configured to block the inspection-use light passing surroundings of the light detecting part out of the inspection-use light scanned by the optical scanning part, wherein the drive control part is configured to supply the electric current to the light source by changing a current value at two points or more when the scanning position of the light by the optical scanning part falls at the predetermined position outside the effective scanning range, is configured to calculate a current-light emission quantity characteristic of the light source based on intensity of the inspection-use light detected by the light detecting part at a point of time of supplying the electric current to the light source, and is configured to adjust the electric current supplied to the light source based on a result of the calculation.