Patent ID: 8228608
Filing Date: 2012-07-24
Classification: G02B

Abstract:
1. A display apparatus which displays an image on a retina of a user, said display apparatus comprising: a light source which emits a beam including a visible light forming the image and an infrared ray; a transmissive deflection unit which includes a first surface facing an eye of the user, and a second surface that is a rear surface of said first surface; and a light detecting unit configured to detect an intensity of reflected light of the beam emitted by said light source which is reflected by said transmissive deflection unit, wherein said transmissive deflection unit includes: wherein said light source emits the infrared ray onto a fogging area of said transmissive deflection unit with a first output intensity, and emits the infrared ray onto an area of said transmissive deflection unit other than the fogging area with a second output intensity, the first output intensity being higher than the second output intensity, and wherein the fogging area on said transmissive deflection unit is determined based on the intensity of the reflected light detected by said light detecting unit.