Patent ID: 8994611
Filing Date: 2015-03-31
Classification: G02B,G02C

Abstract:
1. A head-mounted type display device comprising: a support portion for fixture to a user's head; a body unit fixed to the support portion and having an image output unit from which image output unit image light of an image to be displayed is output; an eyepiece optical unit for allowing image light output from the image output unit to be incident on the eyepiece optical unit, for guiding the incident image light to the corresponding eyeball of the user with the support portion being fixed to the user's head, and for displaying, as a virtual image, a magnified version of the image from the image output unit within a user's visual field; and an attachment portion for attaching the eyepiece optical unit to the body unit in a replaceable manner, wherein the attachment portion attaches at least first and second eyepiece optical units in a replaceable manner, the first and second eyepiece optical units having different optical axis paths in optical systems for guiding the image light from the image output unit to the eyeball, wherein one of the first eyepiece optical unit and the second eyepiece optical unit comprises a tip portion having a width of projection section in a user's visual axis direction narrower than a pupil diameter, while the other of the first eyepiece optical unit and the second eyepiece optical unit comprises a tip portion having a width of projection section in a user's visual axis direction wider than the pupil diameter, and wherein the body unit comprises an image switch unit for switching at least between a see-through display mode in which a large range of change in luminance is set corresponding to the one eyepiece optical unit and a non-see-through display mode in which a small range of change in luminance is set corresponding to the other eyepiece optical unit.