Patent ID: 7623111

Claim:
An image display apparatus in which a liquid crystal display panel having a display area is illuminated by a light source and a viewer sees an image displayed in the display area when illumination light passes through the liquid crystal display panel and reaches an eye or eyes of the viewer, characterized in that the light source is configured in such a manner that lighting positions or lighted regions can be changed, the image display apparatus further comprising; optical means for converging light emitted from the light source and passes through the liquid crystal display panel so that the light goes to a prescribed range; and lighting control means for performing a control of changing the lighting positions or lighted regions of the light source, the image display apparatus further characterized in that: a range defined by a viewing angle, from which an image displayed in the display area is viewable, is changed by the lighting control means's changing a diffusion range of light emitted from the light source, the image display apparatus further comprising; a viewing angle notification device for indicating a state of the viewing angle.