US 12,072,494 B2
Device and method for displaying augmented reality
Kyookeun Lee, Suwon-si (KR); and Harry Edward Milton, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jun. 3, 2021, as Appl. No. 17/338,181.
Claims priority of application No. 10-2020-0067317 (KR), filed on Jun. 3, 2020; and application No. 10-2020-0124748 (KR), filed on Sep. 25, 2020.
Prior Publication US 2021/0389591 A1, Dec. 16, 2021
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01); G02B 27/00 (2006.01); G02C 7/08 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/003 (2013.01); G02B 6/005 (2013.01); G02B 27/0093 (2013.01); G02C 7/083 (2013.01); G02B 2027/014 (2013.01); G02B 2027/0178 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A device for displaying augmented reality (AR), the device comprising:
an optical engine configured to output light of a virtual image;
a waveguide configured to output the light of the virtual image received from the optical engine and transmit light of a real scene;
a first lens part provided on a first surface of the waveguide;
a second lens part provided on a second surface of the waveguide opposite to the first surface; and
a processor,
wherein the first lens part is configured to tune a focus of the virtual image and correct a vision of a user, the first lens part comprising a first focus-tunable lens having a first refractive power that is tunable by the processor and a fixed refractive lens having a fixed refractive power,
wherein the second lens part is configured to compensate distortion of the real scene caused by the first lens part, and the second lens part comprising a second focus-tunable lens having a second refractive power that is tunable by the processor,
wherein the processor is further configured to determine the first refractive power of the first focus-tunable lens to satisfy

OG Complex Work Unit Math
where D1 indicates the first refractive power of the first focus-tunable lens, Dfixed indicates a fixed refractive power of the fixed refractive lens, Dcorrection indicates a correction-required refractive power for correcting ametropia of the user, and f indicates a focal distance of the virtual image, and
wherein the processor is further configured to adjust the first refractive power D1 of the first focus-tunable lens such that the focal distance of the virtual image is an attribute distance of the virtual image.