公开(公告)号：US20230011557A1

公开(公告)日：2023-01-12

申请号：US17698629

申请日：2022-03-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Soomoon PARK ,  Tetsuo ARIYOSHI ,  Ilseop WON ,  Jongpil WON ,  Sangwoo HA

IPC: G02B6/34 ,  G02B27/01

Abstract: Provided is a display device including a light guide plate; a reflective prism configured to reflect an imaging beam toward the light guide plate, wherein the imaging beam reflected by the reflective prism travels within the light guide plate at an angle greater than a critical angle of the light guide plate; and a diffraction grating configured to diffract the imaging beam traveling within the light guide plate to an angle less than or equal to the critical angle of the light guide plate, wherein the reflective prism includes a first surface in contact with the light guide plate, and a second surface configured to reflect the imaging beam.

公开(公告)号：US20230008461A1

公开(公告)日：2023-01-12

申请号：US17587245

申请日：2022-01-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sangwoo HA ,  Tetsuo Ariyoshi ,  Heejin Kim ,  Soomoon Park ,  Jongpil Won

IPC: G02B27/00 ,  G02B27/01 ,  G02B27/09

Abstract: An optical device for exit pupil expansion (EPE) for improving a field of view (FOV) and luminance uniformity, and a display apparatus including the same are provided. The optical device includes: an input part into which a virtual image is input; and an EPE part configured to receive the virtual image from the input part, perform one-dimensional (1D) EPE and two-dimensional (2D) EPE to combine the virtual image with an external real image, and output the combined image.

公开(公告)号：US20250102809A1

公开(公告)日：2025-03-27

申请号：US18977547

申请日：2024-12-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sangwoo HA ,  Tetsuo ARIYOSHI ,  Sornoon PARK ,  llseop WON ,  Jongpil WON

IPC: G02B27/01 ,  F21V8/00 ,  G02B5/18 ,  G02B5/26 ,  G02B27/09 ,  G02B27/28 ,  G02B27/42

Abstract: A display device includes a light guide plate; an input grating on a first surface of the light guide plate and configured to generate a diffracted transmission beam; an output grating on the first surface of the light guide plate and spaced apart from the input grating, wherein the output grating is configured to generate a first output beam emitted from the light guide plate; and an optical efficiency enhancement layer on a second surface of the light guide plate and overlapping at least one of the input grating and the output grating in a traveling direction of the input beam, the second surface being opposite to the first surface.

公开(公告)号：US20240418926A1

公开(公告)日：2024-12-19

申请号：US18817985

申请日：2024-08-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sangwoo HA ,  Jongpil WON ,  Jaesun LEE

IPC: F21V8/00 ,  G02B1/04 ,  G02B27/01

Abstract: An exit pupil expansion (EPE) optical device is provided. The EPE includes a first beam expander including first mirrors and configured to expand a beam width of incident light in a first direction to output expanded light, a second beam expander including second mirrors and configured to expand a beam width of light incident from the first beam expander in a second direction different from the first direction to output in a third direction different from the first direction and the second direction, and a waveguide which includes an exit surface through which light having passed through the first beam expander and the second beam expander is output and in which the first beam expander and the second beam expander are embedded, wherein each of the first mirrors and the second mirrors may form an angle equal to or greater than 20 degrees with respect to a normal of the exit surface.