US 12,332,443 B2
Near-eye display device, augmented reality glasses including same, and operating method therefor
Nikolay Victorovich Muravev, Moscow region (RU); Dmitriy Evgenyevich Piskunov, Moscow region (RU); Gavril Nikolaevich Vostrikov, Moscow region (RU); and Andrey Nikolaevich Putilin, Moscow region (RU)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Dec. 15, 2021, as Appl. No. 17/551,778.
Application 17/551,778 is a continuation of application No. PCT/KR2020/007852, filed on Jun. 17, 2020.
Claims priority of application No. RU2019121958 (RU), filed on Jul. 12, 2019; and application No. 10-2020-0035816 (KR), filed on Mar. 24, 2020.
Prior Publication US 2022/0107501 A1, Apr. 7, 2022
Int. Cl. G02B 27/01 (2006.01); F21V 8/00 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0036 (2013.01); G02B 6/0055 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A near-eye display device comprising:
a projection system configured to project light to display an image;
a first expanding waveguide including a first surface, a second surface opposite to the first surface, and a first expanding diffractive grating disposed on one of the first surface or the second surface, wherein the light projected from the projection system is incident upon the first surface or the second surface; and
a second waveguide upon which light emitted from the first expanding waveguide is incident,
wherein the second waveguide includes a second diffractive grating,
wherein the light from the projection system is incident upon the first expanding diffractive grating included in the first expanding waveguide to form (−1)-order diffraction, 0-order diffraction, and (+1)-order diffraction from respective diffractions of light beams,
wherein the first expanding diffractive grating and the second diffractive grating are located on different planes so that 0-order diffracted light emitted from the first expanding waveguide is incident upon the second waveguide,
wherein (−1)-order diffracted light and (+1)-order diffracted light are extended in the first expanding waveguide due to internal total reflection,
wherein the extended (−1)-order diffracted light and the extended (+1)-order diffracted light are fed back to the first expanding diffractive grating, and the extended (−1)-order diffracted light and the extended (+1)-order diffracted light are incident upon different locations on the first expanding diffractive grating, and
wherein new (−1)-order diffraction, new 0-order diffraction, and new (+1)-order diffraction are formed from each of the extended (−1)-order diffracted light and the extended (+1)-order diffracted light.