US 12,001,110 B2
Tunable attenuation of light transmission artifacts in wearable displays
Hui-Chuan Cheng, Cooper City, FL (US); David Manly, Fort Lauderdale, FL (US); Vaibhav Mathur, Weston, FL (US); Joshua Naaman Haddock, Fort Lauderdale, FL (US); Kevin Messer, Mountain View, CA (US); and Clinton Carlisle, Parkland, FL (US)
Assigned to Magic Leap, Inc., Plantation, FL (US)
Filed by Magic Leap, Inc., Plantation, FL (US)
Filed on Jun. 25, 2021, as Appl. No. 17/359,146.
Claims priority of provisional application 63/044,013, filed on Jun. 25, 2020.
Prior Publication US 2021/0405402 A1, Dec. 30, 2021
Int. Cl. G02F 1/137 (2006.01); G02B 25/00 (2006.01); G02B 27/01 (2006.01); G02F 1/01 (2006.01); G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/1347 (2006.01)
CPC G02F 1/137 (2013.01) [G02B 25/001 (2013.01); G02B 27/0172 (2013.01); G02F 1/0136 (2013.01); G02F 1/133531 (2021.01); G02F 1/133541 (2021.01); G02F 1/133634 (2013.01); G02F 1/133638 (2021.01); G02F 1/1347 (2013.01); G02B 2027/0118 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/014 (2013.01); G02B 2027/0178 (2013.01); G02F 2203/48 (2013.01); G02F 2413/02 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A wearable display system, comprising:
a frame, wearable by a user as eyewear, the frame housing an eyepiece stack having a world side and a user side opposite the world side, wherein during use the user positioned on the user side views displayed images delivered by the wearable display system via the eyepiece stack which augment the user's field of view of the user's environment;
a tunable attenuator arranged on the world side of the of the eyepiece stack, the tunable attenuator comprising a first electro-optic cell and a second electro-optic cell separated from the first electro-optic cell by a first linear polarizer, and the first electro-optic cell, the second electro-optic cell, and the first linear polarizer are arranged between a pair of linear polarizers;
a camera module mounted to the frame and facing the world side; and
an electronic processing module in communication with the tunable attenuator and the camera module, the electronic processing module being programmed to determine information about an angle of incidence of light from an ambient light source based on images captured by the camera module and to vary the attenuation of the tunable attenuator based on the angle of incidence,
wherein for at least one state of the first electro-optic cell and the second electro-optic cell, the tunable attenuator attenuates incident light such that all light having a wavelength in a wavelength range from 460 nm to 630 nm transmitted through the tunable attenuator has a transmission of greater than 10% compared to a transmission of normally incident light for angles of incidence of less than 50° and a transmission of less than 10% compared to the transmission of normally incident light for angles of incidence greater than 70°.