公开(公告)号：US20250093647A1

公开(公告)日：2025-03-20

申请号：US18897860

申请日：2024-09-26

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jaeseung CHUNG ,  Seokil MOON ,  Hoon SONG ,  Jungkwuen AN ,  Changkun LEE

IPC: G02B27/01 ,  G02B5/12 ,  G02B27/28

Abstract: A display system is provided. The display system includes an electronic device including a plurality of projectors emitting a light for providing a three-dimensional (3D) image, and a screen including a geometric phase layer and a retroreflection layer, the geometric phase layer refracts light incident from the plurality of projectors in different directions according to a polarization of the light and the retroreflection layer reflects light incident from the geometric phase layer in an opposite direction to an incident direction, wherein, based on the polarization of the light emitted from the plurality of projectors being a first polarization from among a right-circularly polarization and a left-circularly polarization, the emitted light is refracted in a first direction by the geometric phase layer, the light refracted in the first direction is reflected in an opposite direction to the first direction by the retroreflection layer, and the reflected light is refracted in a second direction toward a predetermined location corresponding to both eyes of a user by the geometric phase layer, and wherein, based on the polarization of the light emitted from the plurality of projectors being a second polarization, the emitted light is refracted in a third direction different from the first direction by the geometric phase layer, the light refracted in the third direction is reflected in an opposite direction to the third direction by the retroreflection layer, and the reflected light is refracted in a fourth direction different from the second direction by the geometric phase layer.

公开(公告)号：US20230400811A1

公开(公告)日：2023-12-14

申请号：US18116528

申请日：2023-03-02

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Seokil MOON ,  Dongheon YOO ,  Changkun LEE ,  Byoungho LEE ,  Minseok CHAE

IPC: G03H1/32 ,  G03H1/26 ,  G06T7/168 ,  G06T5/00

CPC classification number: G03H1/32 ,  G03H1/2645 ,  G06T7/168 ,  G06T5/002 ,  G03H2226/02 ,  G03H2225/32 ,  G03H2001/2655 ,  G06T2207/20021 ,  G06T2200/24 ,  G06T2207/20048

Abstract: A hologram profile optimization method includes: setting a first hologram profile as a variable; and performing an optimization cycle a predetermined number of times, wherein the optimization cycle includes encoding the first hologram profile into a binary hologram profile by using an ApproxSign function; calculating a field value of a holographic image on a display surface for the binary hologram profile, considering high-order diffraction term noise of the holographic image by using a tiling function; calculating an intensity of the holographic image on the display surface; calculating a loss function value based on a difference between the intensity of the holographic image and an intensity of a target image; and updating the first hologram profile to a second hologram profile based on the loss function value.

公开(公告)号：US20230168509A1

公开(公告)日：2023-06-01

申请号：US17744800

申请日：2022-05-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Changkun LEE ,  Seokil MOON

IPC: G02B27/01 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B6/0026 ,  G02B6/0036 ,  G02B6/0065

Abstract: A display apparatus includes a waveguide; an input coupler on the waveguide and configured to introduce light containing an image into the waveguide; and an output coupler on the waveguide and configured to output light traveling in the waveguide to the outside of the waveguide, wherein the output coupler includes a plurality of first diffraction grating elements arranged apart from each other and configured to diffract a first light portion in a first wavelength band among the light traveling in the waveguide.

公开(公告)号：US20210191129A1

公开(公告)日：2021-06-24

申请号：US17131131

申请日：2020-12-22

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Changkun LEE ,  Byoungho LEE ,  Jinsoo JEONG ,  Seokil MOON ,  Geeyoung SUNG ,  Hongseok LEE

IPC: G02B27/01 ,  G02B27/44

Abstract: A display apparatus including a volume grating-based combiner is disclosed. The display apparatus includes: an image providing device; and a combiner, wherein the combiner includes a plurality of volume gratings configured to diffract light containing an image, which is emitted from the image providing device, each volume grating has a first surface and a second surface facing each other, and each volume grating is further configured to diffract light incident on the first surface and transmit therethrough light incident on the second surface without diffraction.