WO2023120744A1 - Dispositif d'affichage proche de l'œil holographique multicolore binoculaire utilisant un seul modulateur spatial de lumière - Google Patents

Dispositif d'affichage proche de l'œil holographique multicolore binoculaire utilisant un seul modulateur spatial de lumière Download PDF

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Publication number
WO2023120744A1
WO2023120744A1 PCT/KR2021/019372 KR2021019372W WO2023120744A1 WO 2023120744 A1 WO2023120744 A1 WO 2023120744A1 KR 2021019372 W KR2021019372 W KR 2021019372W WO 2023120744 A1 WO2023120744 A1 WO 2023120744A1
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WO
WIPO (PCT)
Prior art keywords
eye image
hologram
eye
display device
lens
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Application number
PCT/KR2021/019372
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English (en)
Korean (ko)
Inventor
정진수
홍성희
김영민
홍지수
이병효
Original Assignee
한국전자기술연구원
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Publication of WO2023120744A1 publication Critical patent/WO2023120744A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/344—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] with head-mounted left-right displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G02B2027/0174—Head mounted characterised by optical features holographic

Definitions

  • the present invention relates to a holographic display, and more particularly, to a binocular holographic near-eye display device for reproducing/reconstructing a binocular full-color hologram.
  • FIG. 1 is a diagram showing the configuration of a conventional binocular holographic near-eye display device.
  • a conventional holographic near-eye display device is composed of two Spatial Light Modulators (SLMs) and two 4f-optical systems.
  • SLMs Spatial Light Modulators
  • a method for reducing weight and simplification and a method for reducing manufacturing cost are required.
  • the present invention has been made to solve the above problems, and an object of the present invention is to reduce the weight of a binocular holographic near-eye display device using two existing spatial light modulators.
  • An object of the present invention is to provide a holographic near-eye display device capable of providing different holographic images to both eyes by using the same.
  • a holographic near-eye display device includes a spatial light modulator for reproducing a hologram in which a left-eye image and a right-eye image are synthesized; and a filter which separates the left eye image and the right eye image synthesized in the hologram reproduced by the spatial light modulator and transfers the separated images to the left and right eyes of the observer.
  • the left eye image and the right eye image synthesized in the hologram may be expressed at different spatial frequencies on the spatial frequency plane.
  • the filter may be a spatial filter that separates the left eye image and the right eye image synthesized into the hologram on a spatial frequency plane.
  • a holographic near-eye display device includes a lens positioned between a modulator and a filter; a right eye lens positioned between the filter and the observer's right eye; and a left eye lens positioned between the filter and the viewer's left eye.
  • the spatial filter may have an aperture centered on an optical path of the right eye image formed by the lens and the right eye lens.
  • the lens and the left eye lens may form a 4f-optical system for reconstructing a left eye image.
  • the spatial filter may have an aperture centered on an optical path of the left eye image formed by the lens and the left eye lens.
  • the hologram may be a binocular full-color hologram.
  • the holographic near-eye display device includes reproducing a hologram in which a left eye image and a right eye image are synthesized; and separating the left eye image and the right eye image synthesized in the reproduced hologram and transmitting the separated images to the observer's left and right eyes, respectively.
  • a holographic display system includes a hologram generation system for generating a hologram by encoding a left eye image and a right eye image to be synthesized; a spatial light modulator for reproducing the hologram generated by the hologram generating system; and a filter which separates the left eye image and the right eye image synthesized in the hologram reproduced by the spatial light modulator and transfers the separated images to the left and right eyes of the observer.
  • a holographic display method includes generating a hologram by encoding a left eye image and a right eye image to be synthesized; Reproducing the generated hologram; and separating the left eye image and the right eye image synthesized in the reproduced hologram and transmitting the separated images to the observer's left and right eyes, respectively.
  • the number of lenses and spatial filters constituting the 4f-optical system can be reduced, contributing to lightening and simplification of the device and reduction of manufacturing cost.
  • Binocular full-color holographic near-eye display device using a single spatial light modulator according to an embodiment of the present invention.
  • Spatial light modulator for reproducing a hologram synthesized with a left eye image and a right eye image separated in a spatial frequency band.
  • a binocular full-color holographic near-eye display device using a single spatial light modulator is presented. This is a method of reducing the weight of a holographic near-eye display device by providing different images to the left and right eyes using a single spatial light modulator.
  • a holographic near-eye display device is implemented using time-multiplexing.
  • the left eye image and the right eye image are separated in the spatial frequency band, so that the left eye image and the right eye image can be generated without a separate time division technique.
  • FIG. 2 is a diagram showing the configuration of a binocular full-color holographic near-eye display device according to an embodiment of the present invention.
  • a single spatial light modulator is used instead of two spatial light modulators, and an optical system configuration is implemented more simply by using a modified parallel type 4f-optical system instead of using two 4f-optical systems as before.
  • a holographic near-eye display device performing such a function, as shown, includes a Spatial Light Modulator (SLM) 110, a front lens 120, a spatial filter ) 130, a right eye lens 140 and a left eye lens 150.
  • SLM Spatial Light Modulator
  • the spatial light modulator 110 has a single structure and reproduces a hologram in which a full-color left eye image and a right eye image are synthesized.
  • the left eye image and the right eye image synthesized in the hologram reproduced by the spatial light modulator 110 are expressed as different spatial frequencies or wave numbers on a spatial frequency plane (band).
  • different images can be provided to the left eye and the right eye by the spatial light modulator 110 .
  • the spatial filter 130 separates the left eye image and the right eye image synthesized in the hologram reproduced by the spatial light modulator 110 on a spatial frequency and transmits the separated images to the left eye and the right eye of the observer, respectively.
  • the spatial filter 130 separates a right-eye image and a left-eye image in a spatial frequency plane.
  • a 4f-optical system is required for each of the left eye image and the right eye image.
  • a parallel type 4f-optical system structure in which two necessary optical systems share a front lens is proposed.
  • the parallel 4f-optical system structure includes a front lens 120, a right eye lens 140, and a left eye lens 150.
  • the front lens 120 is located between the spatial light modulator 110 and the spatial filter 130
  • the right eye lens 140 is located between the spatial filter 130 and the observer's right eye
  • the left eye lens 150 is located between the spatial filter 130 and the viewer's right eye. It is located between the filter 130 and the observer's left eye.
  • the front lens 120 and the right eye lens 140 form a 4f-optical system for restoring a right eye image
  • the front lens 120 and the left eye lens 150 form a 4f-optical system for restoring a left eye image.
  • the spatial filter 130 has an aperture centered on the optical path of the right eye image formed by the front lens 120 and the right eye lens 140, and the front lens 120 and the left eye lens. It can be confirmed that an aperture centered on the optical path of the left eye image formed by (150) is formed.
  • off-axis image distortion in the hologram generation step is corrected by the spatial filter 130 .
  • a holographic display system includes a holographic near eye display device 100 and a hologram generating system 200 .
  • the holographic near eye display device 100 is the device shown in FIG. 2, and a detailed description thereof will be omitted.
  • the hologram generation system 200 is a computing system that generates a hologram based on CGH (Computer Generated Hologram) by encoding a left eye image and a right eye image to be synthesized.
  • CGH Computer Generated Hologram
  • the hologram generated by the hologram generating system 200 is transferred to the holographic near eye display device 100 and reproduced/restored.
  • FIG. 7 is a flowchart provided to explain a holographic display method according to another embodiment of the present invention.
  • the hologram display For the hologram display, first, when the hologram generating system 200 generates a hologram by encoding the left eye image and the right eye image so as to be synthesized (S310), the spatial light modulator 110 of the holographic near eye display device 100 operates in step S310. The hologram generated in is reproduced (S320).
  • the front lens 120 and the right eye lens 140 restore the right eye image
  • the spatial filter 130 separates the right eye image on the spatial frequency and simultaneously corrects off-axis image distortion (S330).
  • the front lens 120 and the left eye lens 150 restore the left eye image
  • the spatial filter 130 separates the left eye image on the spatial frequency and simultaneously corrects off-axis image distortion (S340).
  • a holographic near-eye display device in order to reduce the weight of a binocular holographic near-eye display device using two spatial light modulators, a holographic near-eye display device capable of providing different holographic images to both eyes using a single spatial light modulator presented.
  • a holographic near-eye display device can be implemented with a light weight by unifying two existing spatial light modulators and a module for driving the spatial light modulator.
  • a front-end lens and a spatial filter can be reduced by one each, thereby contributing to lightening the weight of the holographic near-eye display device.
  • the technical spirit of the present invention can also be applied to a computer-readable recording medium containing a computer program for performing the functions of the apparatus and method according to the present embodiment.
  • technical ideas according to various embodiments of the present invention may be implemented in the form of computer readable codes recorded on a computer readable recording medium.
  • the computer-readable recording medium may be any data storage device that can be read by a computer and store data.
  • the computer-readable recording medium may be ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, hard disk drive, and the like.
  • computer readable codes or programs stored on a computer readable recording medium may be transmitted through a network connected between computers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Holo Graphy (AREA)
  • Stereoscopic And Panoramic Photography (AREA)

Abstract

L'invention concerne un dispositif d'affichage proche de l'œil proche holographique multicolore binoculaire utilisant un seul modulateur spatial de lumière. Un dispositif d'affichage holographique proche de l'œil selon un mode de réalisation de la présente invention comprend : un modulateur spatial de lumière pour reproduire un hologramme dans lequel une image d'œil gauche et une image d'œil droit sont synthétisées ; et un filtre pour séparer l'image d'œil gauche et l'image d'œil gauche synthétisées dans l'hologramme reproduit par le modulateur spatial de lumière pour le transférer à l'œil gauche et à à l'œil droit d'un observateur, respectivement. Par conséquent, un dispositif d'affichage binoculaire proche de l'œil est mis en œuvre par unification de deux modulateurs spatiaux de lumière existants et d'un module pour piloter les modulateurs spatiaux de lumière, ce qui permet de réduire le poids d'un dispositif et de simplifier le dispositif, et de réduire son coût de fabrication.
PCT/KR2021/019372 2021-12-20 2021-12-20 Dispositif d'affichage proche de l'œil holographique multicolore binoculaire utilisant un seul modulateur spatial de lumière WO2023120744A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2021-0182359 2021-12-20
KR1020210182359A KR102592568B1 (ko) 2021-12-20 2021-12-20 단일 공간광변조기를 사용한 양안식 풀-칼라 홀로그래픽 근안 디스플레이 장치

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Citations (5)

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US20120026303A1 (en) * 2008-12-25 2012-02-02 Stunny 3D, Llc Method for forming and observing stereo images having maximum spatial resolution and a device for carrying out said method
US20120224038A1 (en) * 2011-03-04 2012-09-06 Alexander Roth Autostereoscopic Display System
KR20150088498A (ko) * 2014-01-24 2015-08-03 엘지전자 주식회사 홀로그래픽 디스플레이 장치 및 그의 홀로그램 생성 방법
KR20200063645A (ko) * 2018-11-28 2020-06-05 인하대학교 산학협력단 영상 심도 및 눈의 위치 조절 가능한 홀로그래픽 헤드 마운티드 디스플레이 장치 및 이를 이용한 디스플레이 방법
KR20210125071A (ko) * 2019-02-12 2021-10-15 씨와이 비전 인크 홀로그래픽 헤드업 디스플레이 디바이스

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Publication number Priority date Publication date Assignee Title
WO2012062681A1 (fr) * 2010-11-08 2012-05-18 Seereal Technologies S.A. Dispositif d'affichage, notamment visiocasque basé sur le multiplexage temporel et spatial de carreaux d'hologrammes
RU2650086C1 (ru) * 2016-12-22 2018-04-06 Самсунг Электроникс Ко., Лтд. Устройство отображения голографических изображений и способ функционирования блока управления, содержащегося в нем

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120026303A1 (en) * 2008-12-25 2012-02-02 Stunny 3D, Llc Method for forming and observing stereo images having maximum spatial resolution and a device for carrying out said method
US20120224038A1 (en) * 2011-03-04 2012-09-06 Alexander Roth Autostereoscopic Display System
KR20150088498A (ko) * 2014-01-24 2015-08-03 엘지전자 주식회사 홀로그래픽 디스플레이 장치 및 그의 홀로그램 생성 방법
KR20200063645A (ko) * 2018-11-28 2020-06-05 인하대학교 산학협력단 영상 심도 및 눈의 위치 조절 가능한 홀로그래픽 헤드 마운티드 디스플레이 장치 및 이를 이용한 디스플레이 방법
KR20210125071A (ko) * 2019-02-12 2021-10-15 씨와이 비전 인크 홀로그래픽 헤드업 디스플레이 디바이스

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KR102592568B1 (ko) 2023-10-23

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