Patent ID: 9678346
Date: 2017-06-13
CPC Classifications: G02B,G06F,G09G

Claim:
1. A head-mounted display device comprising: an image display unit including an image-light generating unit that generates image light representing an image and emits the image light and a light guide unit that guides the emitted image light to an eye of a user, the image display unit causing the user to visually recognize a virtual image and an external image that is external to the head-mounted display device; a control unit that includes an operation surface, is connected to the image display unit and controls image display by the image display unit, wherein responsive to an indication that the user has shifted attention from the virtual image, the control unit adjusts luminance of the image-light generating unit or adjusts the image light generated by the image-light generating unit to reduce visibility of the virtual image while maintaining visibility of the external image; a head-side light emitting unit that is arranged in the image display unit and emits invisible light; a control-unit-side light emitting unit that is arranged in the operation surface and emits invisible light; and a contact detecting unit that is arranged in the control unit and for detecting contact with the control unit, wherein when the contact with the control unit is detected, the control unit causes the head-side light emitting unit to emit the invisible light and causes the control-unit-side light emitting unit to emit the invisible light.