# US 2013/0155476 A1 · System of displaying digital hologram based on projection and method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155476 A1 - Document ID: US20130155476A1 - Status: Published application - Kind: A1 - Application number: 13/647,354 - Filed: 2012-10-08 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Electronics and Telecommunications Research Institute - Inventors: Beom Ryeol LEE; Wook Ho SON; Seung Taik OH; Ho Yong SEO; Il Kwon JEONG - Web page: https://patentgrep.com/patent/US20130155476A1 ## CPC - G03H 1/0808: {Methods of numerical synthesis, e.g. coherent ray tracing [CRT], diffraction specific} - G03H 1/2294: {Addressing the hologram to an active spatial light modulator} - G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00}) ## Abstract Disclosed are a system and a method for performing buoyance of a 3D hologram image on a hologram display screen in a projection mode. A system of displaying a digital hologram includes: a composite hologram unit configured to generate a hologram array by receiving hologram data of a fringe pattern and by compositing background image and a foreground image using the received fringe pattern; a hologram projection unit configured to project a hologram image through a wide-angle lens by applying a light to the hologram array; and a hologram display unit configured to perform space buoyance of the hologram image projected by the hologram projection unit on a 3D hologram display screen. The digital hologram content is managed in real time by using the present disclosure, and transmission of the digital hologram content to a remote place and site adaptive display of hologram image media may be achieved. ## Claims ### Claim 1 A system of displaying a digital hologram based on a projection, comprising: a composite hologram unit configured to generate a hologram array by receiving hologram data of a fringe pattern and by compositing a background image and a foreground image using a received fringe pattern; a hologram projection unit configured to project a hologram image through a wide-angle lens by applying a light from a point light source to the hologram array generated from the composite hologram unit; and a hologram display unit configured to perform space buoyance of the hologram image projected by the hologram projection unit on a 3D hologram display screen. ### Claim 2 (depends on 1) The system of claim 1, wherein: the composite hologram unit generates the background image and the foreground image, and generates the hologram array by arrangement of a charge coupled device and a spatial light modulator of a digital camera. ### Claim 3 (depends on 1) The system of claim 1, wherein: the hologram display unit performs space buoyance of the hologram image projected on the 3D hologram display screen by using a spherical mirror. ### Claim 4 (depends on 1) The system of claim 1, wherein: the hologram display unit processes a user's multimodal interface in space buoyance of the hologram image on the 3D hologram display screen, and performs space matching and user interaction by recognizing user's multi-spaces. ### Claim 5 (depends on 1) The system of claim 1, wherein: the digital hologram display system performs at least one of hologram data production process management, regional information management, and distributive storage and management of the hologram data, and interworks with a hologram content management system configured to manage mass hologram data. ### Claim 6 (depends on 5) The system of claim 5, wherein: the hologram content management system converts the hologram data by considering information suitable for a local region situation, and provides the converted hologram data as hologram data specialized to a local region. ### Claim 7 A method of displaying a digital hologram based on a projection, comprising: generating, by a composite hologram unit, a hologram array by receiving hologram data of a fringe pattern and by compositing the received fringe pattern, and a background image and a foreground image; projecting, by a hologram projection unit, a hologram image through a wide-angle lens by applying a light from a point light source to the hologram array generated from the composite hologram unit; and performing, by a hologram display unit, space buoyance of the hologram image projected by the hologram projection unit on a 3D hologram display screen. ### Claim 8 (depends on 7) The method of claim 7, wherein: in the generating of the hologram array, the background image and the foreground image are generated, and the hologram array is generated by arrangement of a charge coupled device and a spatial light modulator of a digital camera. ### Claim 9 (depends on 7) The method of claim 7, wherein: in the performing of space buoyance, the hologram image is subjected to space buoyance on the 3D hologram display screen by using a spherical mirror. ### Claim 10 (depends on 7) The method of claim 7, further comprising: processing, the hologram display unit, a user's multimodal interface in space buoyance of the hologram image on the 3D hologram display screen, and performing space matching and user interaction by recognizing user's multi-spaces. ### Claim 11 (depends on 7) The method of claim 7, further comprising: performing, by a hologram content management system configured to manage mass hologram data, at least one of hologram data production process management, local information management, and distributive storage and management of the hologram data, after the performing of the space buoyance. ### Claim 12 (depends on 11) The method of claim 11, wherein: the hologram content management system converts the hologram data by considering information suitable for a local region situation, and provides the converted hologram data as hologram data specialized to a local region.