公开(公告)号：US10761342B2

公开(公告)日：2020-09-01

申请号：US15856191

申请日：2017-12-28

Applicant: KT Corporation

Inventor： Seung Cheol Kim ,  Jong Heum Kim ,  Tae Gil Yang ,  Sang Hoon Han

IPC: G02B30/56 ,  G03H1/00 ,  G02B30/25 ,  G02B30/36

Abstract: A floating hologram apparatus includes a display including a first output area to output a first hologram image and a second output area to output a second hologram image and a prism array positioned in front of the display and configured to refract rays of the first hologram image and the second hologram image. The prism array includes multiple prisms of which a first facet to which a ray of the second hologram image is incident and a second facet to which a ray of the first hologram image is incident have different angles.

公开(公告)号：US10234692B2

公开(公告)日：2019-03-19

申请号：US15695179

申请日：2017-09-05

Applicant: KT Corporation

Inventor： Jong Heum Kim ,  Seung Cheol Kim ,  Tae Gil Yang ,  Sang Hoon Han

IPC: H04N13/305 ,  H04N9/31 ,  G02B27/22 ,  H04N13/324 ,  G02B5/04

Abstract: An optical element may be arranged, relative to an observer, in front of first and second displays. The optical element may include a prism array in which multiple prisms are arranged in series. The optical element may refract light rays incident into one or more prisms toward a viewing direction of the observer in front of the optical element. Virtual images generated by the refracted light rays may generate a floating hologram in the viewing direction of the observer. The virtual images corresponding to the images output from the first display and the second display may be generated between the optical element and the displays. That is, the observer may perceive the virtual images corresponding to the images output from the first display and the second display by the refracted light rays toward the viewing direction of the observer when the observer sees the images through the optical element.

公开(公告)号：US12124058B2

公开(公告)日：2024-10-22

申请号：US17207099

申请日：2021-03-19

Applicant: KT CORPORATION

Inventor： Seung Cheol Kim ,  Jong Heum Kim ,  Tae Gil Yang ,  Sang Hoon Han

IPC: G02B27/14 ,  G02B30/50

CPC classification number: G02B30/50 ,  G02B27/144

Abstract: A spatial image projection device includes a housing, a display unit that is accommodated in the housing and configured to output a hologram image, a half-mirror configured to project a spatial image corresponding to the hologram image inside the housing, and a first polarizing film that is disposed outside the housing and configured to block a part of light directed toward a viewer from the housing.

公开(公告)号：US11226492B2

公开(公告)日：2022-01-18

申请号：US16205381

申请日：2018-11-30

Applicant: KT Corporation

Inventor： Seung Cheol Kim ,  Jong Heum Kim ,  Tae Gil Yang ,  Sang Hoon Han

IPC: G02B30/56 ,  G02B30/52 ,  G02B27/12 ,  G02B27/10 ,  G03H1/00

Abstract: A three-dimensional image projection apparatus includes a display having a first output section that outputs a first hologram image and a second output section that outputs a second hologram image, and a prism array that is located in front of the display and refracts light rays of the first hologram image and the second hologram image, and the prism array is slanted at a first angle relative to the display.