Compact wearable display
OwnerMilan Momcilo Popovich, Jonathan David Walderninventors
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Abstract
There is provided a wearable display comprising a light source emitting light of a first wavelength; a first SBG device having a front side and a rear side; first and second transparent plates sandwiching said SBG device; independently switchable transparent electrode elements applied to the opposing surfaces of said transparent plates, a means for spatio-temporally modulating light from the light source to provide image light and a means for coupling the image light into the light guide formed by the two transparent plates and the SBG device. The SBG device comprises a multiplicity of selectively switchable grating regions. The SBG device diffracts image into the pupil of an eye.
Claims20
An apparatus for producing an image comprising:
- a source of light of a first wavelength;
- a first SBG layer comprising a multiplicity of grating regions each switchable between a diffracting state and a non diffracting state ;
- first and second transparent plates sandwiching said SBG layer, said transparent plates together functioning as a light guide;
- a multiplicity of independently switchable transparent electrode elements applied to said plates overlaying said switchable grating regions;
- means for spatio-temporally modulating light from said source to provide image light comprising at least one beam deflector for scanning said light in at least one of two orthogonal directions and at least one modulator for amplitude modulating said light;
- and
- means for coupling said image light into said light guide,
- wherein a first scanned angular range of light coupled into said light guide is diffracted out of said light guide into to a first field of view by a first set of grating regions in said diffracting state, each grating region of said set having a first grating function.
Dependencies are inferred from the claim text.