公开(公告)号：US20240272585A1

公开(公告)日：2024-08-15

申请号：US18441340

申请日：2024-02-14

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jae Gyu PARK ,  Sung II Kim ,  Sung Hoon Hong

IPC: G03H1/00 ,  G02B30/35 ,  G02B30/36

CPC classification number: G03H1/0005 ,  G02B30/35 ,  G02B30/36 ,  G03H2001/0088 ,  G03H2223/18 ,  G03H2223/19 ,  G03H2223/24

Abstract: The present disclosure relates to a holographic sheet and a hologram display apparatus including the same. The hologram sheet may include a prism array configured to refract light incident from the outside, and a reflective sheet disposed to face the prism array and configured to reflect the light refracted by the prism array and generate a floating image.

公开(公告)号：US20230375896A1

公开(公告)日：2023-11-23

申请号：US18319882

申请日：2023-05-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Gyu PARK ,  Sung Hoon HONG ,  Soo Jung KIM

IPC: G02F1/313

CPC classification number: G02F1/3138

Abstract: Proposed is a device for switching an optical signal, the device including a first waveguide constituting an input port and a first output port; and a second waveguide constituting a second output port, wherein the first waveguide is formed of a first material, wherein the second waveguide is formed of the first material and contains a second material, wherein a gap between the first and second waveguides has a first value in a first section, a gap therebetween has a value increasing from the first value to a second value in a second section, and a gap therebetween has a third value in a third section, wherein at least one portion of the first section and at least one portion of the second section overlap in the one section, and wherein a grating structure applies to the first and second waveguides in at least one portion of the first section.