公开(公告)号：US20220253017A1

公开(公告)日：2022-08-11

申请号：US17371415

申请日：2021-07-09

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Korea University Research and Business Foundation, Sejong Campus

Inventor： Yunhee Kim ,  Hwi Kim ,  Youngjae Kim ,  Hoon Song ,  Hongseok Lee

IPC: G03H1/22 ,  G02B27/09 ,  G02B1/00

Abstract: A beam expanding film includes a first material layer and a photonic crystal layer that expands a width of incident light and emits light having an expanded width. The photonic crystal layer includes a first material layer and a plurality of second material layers buried in the first material layer. A holographic display apparatus includes a backlight unit configured to provide coherent collimated light; a beam expanding film described above and facing the backlight unit; a flat panel arranged between the backlight unit and the beam expanding film to provide a hologram; and a lens configured to focus a holographic image on a space.

公开(公告)号：US20220196900A1

公开(公告)日：2022-06-23

申请号：US17693974

申请日：2022-03-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chilsung CHOI ,  Hoon Song ,  Jungkwuen An ,  Hongseok Lee

IPC: F21V8/00 ,  G03H1/08 ,  G03H1/22 ,  G02B30/25

Abstract: A backlight unit may include: a light source providing coherent light; a light guide plate having a light entrance surface on which light from the light source is incident and a light exit surface through which the light is output; a plurality of diffraction gratings (for example, a first input grating, a second input grating, and a third input grating) that are arranged in different regions of the light guide plate to sequentially diffract the light from the light source such that that the beam width of the light may increase as the light propagates in the light guide plate; and a diffraction grating (for example, an output grating) that diffracts and outputs the light having an increased beam width in a direction toward the outside of the light guide plate.

公开(公告)号：US11307343B2

公开(公告)日：2022-04-19

申请号：US16675387

申请日：2019-11-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chilsung Choi ,  Hoon Song ,  Jungkwuen An ,  Hongseok Lee

IPC: G02B27/00 ,  F21V8/00 ,  G03H1/08 ,  G03H1/22 ,  G02B30/25

Abstract: A backlight unit may include: a light source providing coherent light; a light guide plate having a light entrance surface on which light from the light source is incident and a light exit surface through which the light is output; a plurality of diffraction gratings (for example, a first input grating, a second input grating, and a third input grating) that are arranged in different regions of the light guide plate to sequentially diffract the light from the light source such that that the beam width of the light may increase as the light propagates in the light guide plate; and a diffraction grating (for example, an output grating) that diffracts and outputs the light having an increased beam width in a direction toward the outside of the light guide plate.

公开(公告)号：US20220113540A1

公开(公告)日：2022-04-14

申请号：US17375822

申请日：2021-07-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chilsung Choi ,  Hoon Song ,  Hongseok Lee

IPC: G02B27/01 ,  G02B30/25 ,  G02B5/18 ,  G02B5/30

Abstract: Provided is a waveguide structure including an output grating, a polarization conversion element provided parallel to the output grating, and a polarization separation element provided between the output grating and the polarization conversion element, wherein the polarization separation element is configured to transmit, to the output grating, light having a first polarization direction among light incident on the polarization separation element, and reflect, to the polarization conversion element, light having a second polarization direction different from the light having the first polarization direction among the light incident on the polarization separation element.

公开(公告)号：US11287655B2

公开(公告)日：2022-03-29

申请号：US16742425

申请日：2020-01-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jongyoung Hong ,  Wontaek Seo ,  Changkun Lee ,  Hongseok Lee ,  Hoon Song

IPC: G02B27/01 ,  F21V8/00 ,  G03H1/22 ,  H04N9/31

Abstract: A holographic display apparatus includes a light guide plate including an input coupler and an output coupler, a holographic image generating assembly configured to generate a holographic image and provide the holographic image to the input coupler of the light guide plate, and an image processor configured to convert source image data based on a point spread function, which is obtained for each pixel of the holographic image on an image plane, to compensate for a blur of the holographic image output through the output coupler.

公开(公告)号：US11262614B2

公开(公告)日：2022-03-01

申请号：US16883596

申请日：2020-05-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kanghee Won ,  Young Kim ,  Hoon Song ,  Sunil Kim ,  Jungkwuen An ,  Sunghoon Lee ,  Hongseok Lee ,  Chilsung Choi

IPC: G02F1/1335 ,  G02F1/13363 ,  G02B5/30 ,  G03H1/22 ,  G02F1/29 ,  G02B30/25 ,  G02B30/56

Abstract: A beam deflector includes a first wavelength selective polarizer configured to convert a polarization state of light in a first wavelength band into a first polarization state, a first liquid crystal deflector including liquid crystal molecules and an optical path change surface to deflect light incident from the first wavelength selective polarizer, and a controller configured to control the first liquid crystal deflector to adjust an angle of the first optical path change surface.

公开(公告)号：US11237316B2

公开(公告)日：2022-02-01

申请号：US17034923

申请日：2020-09-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jong-Young Hong ,  Hoon Song ,  Jungkwuen An ,  Hongseok Lee

IPC: F21V8/00

Abstract: An optical device includes a first backlight configured to output first light of a first wavelength through a first output coupler, a first lens disposed to face the first output coupler and having a focal length with respect to the first light, a second backlight including a second output coupler, the second backlight being configured to output second light of a second wavelength through the second output coupler, a second lens disposed to face the second output coupler and having different focal lengths with respect to the first light and the second light, a third backlight including a third output coupler, the third backlight being configured to output third light of a third wavelength through the third output coupler, and a third lens disposed to face the third output coupler and having different focal lengths with respect to the first light, the second light, and the third light.

公开(公告)号：US20210318480A1

公开(公告)日：2021-10-14

申请号：US17034923

申请日：2020-09-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jong-Young Hong ,  Hoon Song ,  Jungkwuen An ,  Hongseok Lee

IPC: F21V8/00

Abstract: An optical device includes a first backlight configured to output first light of a first wavelength through a first output coupler, a first lens disposed to face the first output coupler and having a focal length with respect to the first light, a second backlight including a second output coupler, the second backlight being configured to output second light of a second wavelength through the second output coupler, a second lens disposed to face the second output coupler and having different focal lengths with respect to the first light and the second light, a third backlight including a third output coupler, the third backlight being configured to output third light of a third wavelength through the third output coupler, and a third lens disposed to face the third output coupler and having different focal lengths with respect to the first light, the second light, and the third light.

公开(公告)号：US11073794B2

公开(公告)日：2021-07-27

申请号：US16732928

申请日：2020-01-02

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Korea University Research and Business Foundation, Sejong Campus

Inventor： Hoon Song ,  Hwi Kim ,  Jungkwuen An ,  Hongseok Lee ,  Yunhee Kim ,  Chilsung Choi

IPC: G06T3/40 ,  G03H1/22

Abstract: A holographic display apparatus capable of providing an expanded viewing window and a display method are provided. The holographic display apparatus includes an image processor configured to provide computer generated hologram (CGH) data to a spatial light modulator, wherein the image processor is further configured to generate a hologram data array comprising information of the holographic image to be reproduced at the first resolution or a resolution less than the first resolution, perform an off-axis phase computation on the hologram data array at the second resolution, and then, generate the CHG data at the first resolution.

公开(公告)号：US10802199B2

公开(公告)日：2020-10-13

申请号：US15691091

申请日：2017-08-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chilsung Choi ,  Sunil Kim ,  Hoon Song ,  Jungkwuen An ,  Hongseok Lee

IPC: G03H1/22 ,  G03H1/04 ,  G02B5/32 ,  F21V8/00 ,  G03H1/02 ,  G03H1/18 ,  G06F3/01

Abstract: A backlight device having a light guide, a first holographic optical element and a second holographic element are provided. The light guide plate guides light emitted by a light source towards the first holographic optical element. The first holographic optical element, which has a multi-layered structure, is provided on a first side of the light guide plate and reflects the light according to the wavelength ranges based on the characteristics of the multi-layered structure. The second holographic optical element, which concentrates light reflected by the first holographic optical element onto at least two points is provided on a second side of the light guide plate perpendicular to the first side.