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公开(公告)号：US11774752B2
公开(公告)日：2023-10-03
申请号：US17107290
申请日：2020-11-30
发明人： Hoon Song , Hongseok Lee , Young Kim , Jungkwuen An , Kanghee Won , Chilsung Choi
CPC分类号： G02B27/0068 , G03H1/2286 , G03H2001/221 , G03H2001/2234 , G03H2222/18
摘要： A holographic display device includes a light source configured to emit light, the light including first light of a first wavelength, second light of a second wavelength, and third light of a third wavelength; a spatial light modulator configured to form a holographic pattern to modulate the light emitted from the light source and to produce a holographic image; and a focusing optical system configured to focus the holographic image. The focusing optical system includes a fixed-focus optical system having a fixed focal length, and a variable focus optical system having a focal length that is changed by electrical control. The fixed-focus optical system is configured to focus the first light of the first wavelength, the second light of the second wavelength, and the third light of the third wavelength on different positions, respectively, on an optical axis to cancel a chromatic aberration by the variable focus optical system.
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2.发明授权公开(公告)号：US11635633B2
公开(公告)日：2023-04-25
申请号：US17036837
申请日：2020-09-29
发明人： Young Kim , Soonbum Kwon , Byonggwon Song , Jungkwuen An , Kanghee Won , Hongseok Lee , Jong-Young Hong
IPC分类号： G02B30/25 , G02F1/13 , G02F1/1335
摘要： A geometric phase optical element and a three-dimensional display apparatus including the same are provided. The geometric phase optical element includes: a liquid crystal layer; a first electrode on a surface of the liquid crystal layer; and a second electrode on another surface of the liquid crystal layer, wherein, when no voltage is applied to the first and second electrodes, the liquid crystal layer is configured such that a phase difference according to an arrangement of the liquid crystal is π and light transmitted through the liquid crystal layer is diffracted by a first deflection angle, and when a first voltage that causes the phase difference according to the arrangement of the liquid crystal to become π/2 is applied to the first and second electrodes, the liquid crystal layer is configured such that the light transmitted through the liquid crystal layer is diffracted by a second deflection angle.
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公开(公告)号：US11561399B2
公开(公告)日：2023-01-24
申请号：US16919987
申请日：2020-07-02
申请人： SAMSUNG ELECTRONICS CO., LTD. , IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
发明人： Young Kim , Hongseok Lee , Seokho Song , Jungkwuen An , Kanghee Won , Changkun Lee
摘要： Provided are a Fourier-beam shaper and a display apparatus including the Fourier-beam shaper. The Fourier-beam shaper includes: a waveguide; an input coupler configured to direct a plurality of light beams toward the waveguide in a time-sequential manner; and a spatial converter configured to output the plurality of light beams traveling in the waveguide through spatially different regions of the spatial converter.
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公开(公告)号：US20220308526A1
公开(公告)日：2022-09-29
申请号：US17502316
申请日：2021-10-15
发明人： Hyeonseung Yu , Hoon Song , Jungkwuen An , Hongseok Lee
IPC分类号： G03H1/22
摘要： A holographic display device is provided. The holographic display device includes a spatial light modulator for representing a partial complex domain and reproducing a hologram by diffracting light, and a processor for controlling the spatial light modulator. The processor controls the spatial light modulator by employing an algorithm for calculating hologram information according to the representation of the partial complex domain of the spatial light modulator.
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5.发明申请公开(公告)号：US20210302757A1
公开(公告)日：2021-09-30
申请号：US17036837
申请日：2020-09-29
发明人： Young Kim , Soonbum Kwon , Byonggwon Song , Jungkwuen An , Kanghee Won , Hongseok Lee , Jong-Young Hong
IPC分类号： G02B30/25 , G02F1/1335
摘要： A geometric phase optical element and a three-dimensional display apparatus including the same are provided. The geometric phase optical element includes: a liquid crystal layer; a first electrode on a surface of the liquid crystal layer; and a second electrode on another surface of the liquid crystal layer, wherein, when no voltage is applied to the first and second electrodes, the liquid crystal layer is configured such that a phase difference according to an arrangement of the liquid crystal is π and light transmitted through the liquid crystal layer is diffracted by a first deflection angle, and when a first voltage that causes the phase difference according to the arrangement of the liquid crystal to become π/2 is applied to the first and second electrodes, the liquid crystal layer is configured such that the light transmitted through the liquid crystal layer is diffracted by a second deflection angle.
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6.发明授权公开(公告)号：US11119444B2
公开(公告)日：2021-09-14
申请号：US16514253
申请日：2019-07-17
发明人： Yunhee Kim , German B. Dubinin , Alexander V. Morozov , Sunil Kim , Hoon Song , Jungkwuen An , Young Kim , Hongseok Lee , Chilsung Choi
摘要： A backlight unit for a binocular-holographic display device and a holographic display device including the same are provided. The backlight unit includes a light source unit which outputs light, a first beam expansion unit which expands, in a first direction, the light output from the light source unit, a second beam expansion unit which expands, in a second direction perpendicular to the first direction, the light output from the first beam expansion unit, and a beam deflection unit which diffracts light incident on the first beam expansion unit. The holographic display device includes the backlight unit, a field lens, and a spatial light modulator.
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公开(公告)号：US20210003852A1
公开(公告)日：2021-01-07
申请号：US16919987
申请日：2020-07-02
申请人： SAMSUNG ELECTRONICS CO., LTD. , IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
发明人： Young Kim , Hongseok Lee , Seokho Song , Jungkwuen An , Kanghee Won , Changkun Lee
摘要： Provided are a Fourier-beam shaper and a display apparatus including the Fourier-beam shaper. The Fourier-beam shaper includes: a waveguide; an input coupler configured to direct a plurality of light beams toward the waveguide in a time-sequential manner; and a spatial converter configured to output the plurality of light beams traveling in the waveguide through spatially different regions of the spatial converter.
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公开(公告)号：US10775742B2
公开(公告)日：2020-09-15
申请号：US15271351
申请日：2016-09-21
发明人： Juwon Seo , Wontaek Seo , Hoon Song , Jungkwuen An , Hongseok Lee
摘要： An apparatus and method for processing a holographic image. The apparatus calculates a first calculation result with respect to an image for the left eye and a first calculation result with respect to an image for the right eye and stores the results at different memory addresses of a storage. Thereafter, the apparatus calculates values of a waveform of light to be modulated by a spatial light modulator by performing a second calculation that uses all of the first calculation results stored in the storage. An image window of the image for the left eye and an image window of the image for the right eye are spatially separated from each other by the apparatus in a viewing window of a hologram image reproduced via the spatial light modulator.
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9.发明申请公开(公告)号：US20200050146A1
公开(公告)日：2020-02-13
申请号：US16660887
申请日：2019-10-23
发明人： Yunhee Kim , German B. Dubinin , Alexander V. Morozov , Sunil Kim , Hoon Song , Jungkwuen An , Young kim , Hongseok Lee , Chilsung Choi
摘要： A backlight unit for a binocular-holographic display device and a holographic display device including the same are provided. The backlight unit includes a light source unit which outputs light, a first beam expansion unit which expands, in a first direction, the light output from the light source unit, a second beam expansion unit which expands, in a second direction perpendicular to the first direction, the light output from the first beam expansion unit, and a beam deflection unit which diffracts light incident on the first beam expansion unit. The holographic display device includes the backlight unit, a field lens, and a spatial light modulator.
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公开(公告)号：US20200050145A1
公开(公告)日：2020-02-13
申请号：US16287493
申请日：2019-02-27
发明人： Young KIM , Hongseok Lee , Hoon Song , Jungkwuen An , Kanghee Won , Chilsung Choi
IPC分类号： G03H1/04 , G02F1/1343 , G02F1/1335 , G02B6/12 , G02F1/133
摘要： A focus modulation optical system and a holographic display device having the focus modulation optical system are disclosed. The holographic display device includes a light source configured to emit a plurality of color lights, a focus modulation optical system including at least one variable focus lens that is configured to change a focusing position of incident light by electrical control of the at least one variable focus lens based on a color of light incident on the variable focus lens, and a spatial light modulator configured to form a holographic image by diffracting light output from the focus modulation optical system.
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