Patent ID: 9223137
Filing Date: 2015-12-29
Classification: G02B

Abstract:
1. A virtual image display apparatus comprising: an image display device that forms image light, the image light comprising a plurality of light rays; an optical-directivity changing section that changes directivity of the image light emitted from the image display device such that different light rays are directed at different angles to form a non-uniform distribution, the optical-directivity changing section bending the plurality of light rays in different angles along a first direction according to an emission position of each of the plurality of light rays from an emission surface of the image display device; a projection optical system that modulates the image light emitted from the optical-directivity changing section to form a virtual image; and a light guide device including a light incident section that captures the image light passed through the projection optical system into an inside of the light incident section, a light guide section that guides the image light captured from the light incident section using total reflection on first and second reflection surfaces extending while being opposed to each other, and a light emitting section that extracts the image light passed through the light guide section to an outside, wherein the first reflection surface and the second reflection surface of the light guide section are arranged in parallel to each other and enable light guide by total reflection, the light incident section has a third reflection surface formed at a first predetermined angle with respect to the first reflection surface, the light emitting section has a fourth reflection surface formed at a second predetermined angle with respect to the first reflection surface, and the first, second, third and fourth reflection surfaces are different faces of the light guide device, the first predetermined angle and the second predetermined angle are equal to each other.