Eyepieces for use in wearable display systems
AssigneeMagic Leap, Inc.
InventorsDianmin Lin, Pierre St. Hilaire
Life of this patent
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Abstract
An example a head-mounted display device includes a light projector and an eyepiece. The eyepiece is arranged to receive light from the light projector and direct the light to a user during use of the wearable display system. The eyepiece includes a waveguide having an edge positioned to receive light from the display light source module and couple the light into the waveguide. The waveguide includes a first surface and a second surface opposite the first surface. The waveguide includes several different regions, each having different grating structures configured to diffract light according to different sets of grating vectors.
Claims19
An apparatus comprising:
- an eyepiece comprising a waveguide positioned to receive light from a light projector and couple the light into the waveguide, the waveguide comprising a first surface and a second surface opposite the first surface,
- wherein in a first region of the waveguide, the second surface defines a plurality of first grating structures configured to diffract light according to a first diffraction pattern;
- wherein in a second region of the waveguide different from the first region, the second surface defines a plurality of second grating structures configured to diffract light according to a second diffraction pattern different from the first diffraction pattern;
- wherein in a third region of the waveguide different from the first and second regions, the second surface defines a plurality of third grating structures configured to diffract light according to a third diffraction pattern different from the first and second diffraction patterns;
- and
- wherein the second region of the waveguide at least partially encloses the third region of the waveguide.
A method comprising:
- forming a waveguide having a first surface and a second surface opposite the first surface, wherein forming the waveguide comprises:
- defining a plurality of first grating structures on the second surface along a first region of the waveguide, the plurality of first grating structures being configured to diffract light according to a first diffraction pattern,
- defining a plurality of second grating structures on the second surface along a second region of the waveguide different from the first region, the plurality of second grating structures being configured to diffract light according to a second diffraction pattern different from the first diffraction pattern, and
- defining a plurality of third grating structures on the second surface along a third region of the waveguide different from the first and second regions, the plurality of third grating structures being configured to diffract light according to a third diffraction pattern different from the first diffraction pattern and the second diffraction pattern,
- wherein the second region and third region are defined such that the second region at least partially encloses the third region.
Dependencies are inferred from the claim text.