Patent ID: 9477084
Filing Date: 2016-10-25
CPC Classification: G02B

Claim Text:
1. A virtual image display apparatus comprising: a video element which generates video light; and a light guide member which includes four or more curved surfaces including three or more non-axisymmetric curved surfaces, wherein the video light emitted from the video element and passing through the light guide member is displayed to an observer on a divergent optical path in an enlarged manner, the light guide member includes at least three surfaces of a first surface, a second surface, and a third surface as the four or more curved surfaces, reflection of the video light is made four times by four surfaces different from one another in the inside of the light guide member, total reflection is performed on the third surface as a second reflection among the four times of reflections, total reflection is performed on the first surface as a third reflection, reflection is performed on the second surface as the fourth reflection, and the video light reaches the eyes of the observer by being transmitted through the first surface, and the following condition (1) is satisfied with a coefficient of a term x