Patent ID: 8403490
Filing Date: 2013-03-26
Classification: B60R,G02B,H04N

Abstract:
1. A beam scanning-type display device, comprising: a light source which emits a beam; a scanning unit configured to perform scanning the beam emitted from the light source; a deflecting unit configured to deflect the beam used for the scanning performed by the scanning unit towards an eye of a user; a wavefront shape changing unit configured to change a wavefront shape of the beam emitted from the light source so that a spot size of the beam falls within a predetermined allowable range, and output the beam to the scanning unit; a light detecting unit configured to detect a part of the beam used for the scanning performed by the scanning unit, the part of the beam being a reflected light of the beam when the beam enters the eye of the user and is reflected from a cornea of the eye; a line-of-sight detecting unit configured to detect a line-of-sight direction of the user based on intensity of the reflected light detected by the light detecting unit; and a visual field position determining unit configured to determine a position of the beam in a visual field of the user, based on the line-of-sight direction detected by the line-of-sight detecting unit, wherein the wavefront shape changing unit is configured to change the wavefront shape of the beam, based on the allowable range which varies depending on the position of the beam determined by the visual field position determining unit.