Patent ID: 8792175

Claim:
A virtual image display system comprising: a display device that outputs image light; a projection lens that projects the image light from the display device; a first holding member that holds the projection lens; a light guide plate that takes in the image light from the projection lens, and then, guides the light to an external predetermined position; and a second holding member that holds the light guide plate, wherein a positioning structure for positioning of the light guide plate with respect to the projection lens is provided within the first holding member and within the second holding member, wherein the light guide plate includes: an image lead-in part that is provided to face the projection lens and leads the image light from the projection lens into the light guide plate; a total reflection part that has a pair of total reflection surfaces formed in flat shapes orthogonal to an optical axis of the projection lens in parallel to each other, and guides the image light that has been led into the light guide plate in a direction away from the image lead-in part by total reflection on the pair of total reflection surfaces; and an image lead-out part that leads the image light that has been guided by the total reflection surface to the external predetermined position.