US 12,352,972 B2
Compact rim-mounted curved optical see-through lightguide based eyewear as mobile augmented reality display
Ozan Cakmakci, Sunnyvale, CA (US); and Daniel Corbalan, San Francisco, CA (US)
Assigned to GOOGLE LLC, Mountain View, CA (US)
Appl. No. 17/771,564
Filed by GOOGLE LLC, Mountain View, CA (US)
PCT Filed Dec. 13, 2019, PCT No. PCT/US2019/066240
§ 371(c)(1), (2) Date Apr. 25, 2022,
PCT Pub. No. WO2021/118596, PCT Pub. Date Jun. 17, 2021.
Prior Publication US 2022/0397765 A1, Dec. 15, 2022
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0031 (2013.01); G02B 2027/0178 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An optical device comprising:
a display oriented toward an eye-side of the optical device and configured to emit light toward the eye-side of the optical device based on an input signal;
a lightguide having:
a curved first surface at the eye-side of the optical device; and
a curved second surface for reflecting the light through the curved first surface to a user eye;
a reflector having a reflective surface positioned at the eye-side relative to the display above at least one of the curved first surface and the curved second surface of the lightguide, wherein the reflector is positioned to reflect light from the display into the lightguide; and
a head mountable frame supporting the display, the reflective surface, and the lightguide, wherein the display is positioned at a top of the head mountable frame.