US 12,437,687 B2
Alignment of waveguide and display in smartglasses
Daniel Adema, Kitchener (CA); Shreyas Potnis, Kitchener (CA); and Eliezer Glik, San Diego, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Sep. 6, 2023, as Appl. No. 18/462,262.
Claims priority of provisional application 63/374,773, filed on Sep. 7, 2022.
Prior Publication US 2024/0078944 A1, Mar. 7, 2024
Int. Cl. G09G 3/00 (2006.01); G02B 27/01 (2006.01)
CPC G09G 3/007 (2013.01) [G02B 27/0172 (2013.01); G02B 2027/0121 (2013.01); G02B 27/017 (2013.01); G02B 2027/0178 (2013.01); G09G 2320/0693 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method, comprising:
emitting, from an emitter of a first pixel of a plurality of pixels of a display of a head worn device, light toward an incoupler of a waveguide of the head worn device, the first pixel having a first location in the display;
detecting, from a second pixel of the plurality of pixels, light reflected from the incoupler of the waveguide, the second pixel being in a read mode and including an emitter configured to function as a detector that identifies a second location of the second pixel in the display;
determining a misalignment between the display and the waveguide based on a difference between the first location and the second location; and
shifting the plurality of pixels based on the misalignment.