US 11,899,200 B2
Method and system for reducing line separation artifacts in interlaced image projection
Lionel Ernest Edwin, Hollywood, FL (US); Bjorn Nicolaas Servatius Vlaskamp, Plantation, FL (US); Samuel A. Miller, Hollywood, FL (US); and Aaron M. Clarke, Plantation, FL (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Apr. 16, 2021, as Appl. No. 17/233,283.
Application 17/233,283 is a continuation of application No. PCT/US2019/057039, filed on Oct. 18, 2019.
Claims priority of provisional application 62/747,916, filed on Oct. 19, 2018.
Prior Publication US 2021/0302719 A1, Sep. 30, 2021
Int. Cl. G02B 26/10 (2006.01); G02B 26/08 (2006.01); G03B 21/00 (2006.01); H04N 9/31 (2006.01)
CPC G02B 26/101 (2013.01) [G02B 26/0833 (2013.01); G03B 21/008 (2013.01); H04N 9/3129 (2013.01); H04N 9/3161 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image projection system, comprising:
an optical subsystem for emitting a modulated light beam, wherein the modulated light beam is modulated according to a plurality of image fields in sequence;
a scanning mirror positioned to intercept the modulated light beam and generate a reflected light beam, wherein the scanning mirror includes an actuator configured to adjust an orientation of the scanning mirror according to a sequence of scan patterns, wherein the sequence of scan patterns corresponds to:
a randomly selected scan pattern sequence of a plurality of different scan patterns;
a pseudo-randomly selected scan pattern sequence of the plurality of different scan patterns; or
a quasi-randomly selected scan pattern sequence of the plurality of different scan patterns; and
projection optics positioned to receive the reflected light beam and project a plurality of images in sequence, wherein each image of the plurality of images comprises multiple image fields of the plurality of image fields;
wherein each scan pattern of the sequence of scan patterns is (i) randomly selected, pseudo-randomly selected, or quasi-randomly selected from a fixed number of different scan patterns in the plurality of different scan patterns, and is (ii) phase shifted relative to each other scan pattern of the plurality of different scan patterns.