Patent ID: 8033667

Claim:
An image display device, comprising: a screen having a fluorescent region including a fluorescent material; a light irradiation system, including: a first light source outputting excitation light exciting the fluorescent material; a second light source outputting visible light; a driving unit individually operating the first light source and the second light source corresponding to image information; and a scanning unit scanning with a light beam output from each of the first light source and the second light source in a main scanning direction and a sub-scanning direction intersecting with the main scanning direction on the screen; and an excitation light wavelength band reflector having a function to reflect light in a wavelength band of the excitation light toward the screen, and formed on an output side of a light beam from the light irradiation system with respect to the screen, wherein the visible light output from the second light source develops a first color by diffusion by being projected on the screen, while the excitation light output from the first light source develops a second color by fluorescence by being projected in the fluorescent region, the second color being different from the color developed by the visible light so as to display an image corresponding to the image information on the screen.