US 12,078,896 B2
Techniques for complex wavefront modulation
Changwon Jang, Kirkland, WA (US)
Assigned to Meta Platforms, Inc., Menlo Park, CA (US)
Filed by META PLATFORMS, INC., Menlo Park, CA (US)
Filed on Jan. 31, 2023, as Appl. No. 18/162,615.
Application 18/162,615 is a division of application No. 17/162,060, filed on Jan. 29, 2021, granted, now 11,567,375.
Prior Publication US 2023/0168548 A1, Jun. 1, 2023
Int. Cl. G02F 1/1347 (2006.01); G02F 1/1335 (2006.01); G02F 1/1343 (2006.01); G02F 1/139 (2006.01); H10K 59/50 (2023.01)
CPC G02F 1/13471 (2013.01) [G02F 1/133531 (2021.01); G02F 1/13439 (2013.01); G02F 1/1396 (2013.01); G02F 2203/02 (2013.01); H10K 59/50 (2023.02)] 11 Claims
OG exemplary drawing
 
1. A computer-implemented method for modulating light, the method comprising:
determining states of a plurality of pixels for at least one point in time;
driving each pixel included in the plurality of pixels based on a corresponding state,
wherein driving the pixel comprises:
driving a first liquid crystal cell, using a first electrode on a first side of the liquid crystal cell, to modulate at least an amplitude of light, and
driving a second liquid crystal cell, using a second electrode, to modulate at least a phase of the light,
wherein the first liquid crystal cell is in line with the second liquid crystal cell, the second liquid crystal cell is on a second side of the first liquid crystal cell opposite the first side, and the second electrode is on an opposite side of the second liquid crystal cell than the first electrode;
passing the light beam through a ground shared by the first liquid crystal cell and the second liquid crystal cell; and
projecting a light beam that is incident on the plurality of pixels.