Display device comprising multifunction glass, production method, and optical element having a Fresnel structure
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United States of America Patent
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Jun 18, 2013
Grant Date -
Jan 5, 2012
app pub date -
Feb 25, 2010
filing date -
Feb 25, 2009
priority date (Note) -
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Abstract
A display device including a holding device that can be placed on the head of a user, an image generating module fixed to the holding device and generating an image, and a multifunction glass that is fixed to the holding device and has a coupling in area and a coupling out area. The image produced is coupled into the multifunction glass via the coupling in area, guided in the multifunction glass to the coupling in area, and extracted via the coupling out area, in such a way that the user can perceive the coupled out image superimposed on the surroundings when the holding device is placed on the head of the user. The coupling in area has a Fresnel structure causing a folding of the beam path when the image is injected into the multifunction glass, said structure having an imaging property.
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