US 11,906,745 B1
Display backing
Qianyi Zhao, Cupertino, CA (US); Runren Zhang, San Jose, CA (US); Zhenggang Cheng, Santa Clara, CA (US); Jeffrey A Griffis, San Carlos, CA (US); and Stephen E Dey, San Francisco, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Apr. 14, 2022, as Appl. No. 17/721,255.
Claims priority of provisional application 63/179,119, filed on Apr. 23, 2021.
Int. Cl. G02B 27/01 (2006.01); G06F 3/01 (2006.01)
CPC G02B 27/0172 (2013.01) [G06F 3/011 (2013.01); G02B 2027/014 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A head-mounted device (HMD), comprising:
a display;
a metal backing plate; and
a coil;
wherein the coil is configured to generate a magnetic field; and
wherein the backing plate includes at least one perforation configured to reduce an eddy current in the backing plate caused by the magnetic field, wherein the at least one perforation is placed along a path of the eddy current.