# US 10,768,424 B2 · Holographic head-up display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,424 B2 - Document ID: US10768424B2 - Status: Granted - Kind: B2 - Application number: 15/861,525 - Filed: 2018-01-03 - Published: 2019-01-10 - Granted: 2020-09-08 - Earliest claimed: 2017-07-05 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Hye Sog Lee; Byung Choon Yang; Jae Ho You - Web page: https://patentgrep.com/patent/US10768424B2 ## CPC - G02B 27/0172: {characterised by optical features} - G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)} - G02B 27/0103: {comprising holographic elements} - G02B 27/0916: {Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers (coupling into light guides using intermediate optical elements G02B6/4204; details of lighting devices in general F21V)} - G02B 27/0977: {Reflective elements} - G03H 1/10: using modulated reference beam - G03H 1/2205: {using downstream optical component} - G03H 1/2294: {Addressing the hologram to an active spatial light modulator} - G02B 2027/0174: {holographic} - G03H 2001/2207: {Spatial filter, e.g. for suppressing higher diffraction orders} - G03H 2001/221: {Element having optical power, e.g. field lens} - G03H 2001/2284: {Superimposing the holobject with other visual information} - G03H 2223/54: Filtering the holobject information - G03H 2223/55: Arranged at a Fourier plane - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 A holographic head-up display device has a light source portion that emits coherent light; an optical modulation portion that modulates the coherent light; a relay optical system that focuses the modulated light; a filter minor that has a reflection area at a focal position of the relay optical system and reflecting light incident through the relay optical system and an absorption area at the periphery of the reflection area and absorbing light incident through the relay optical system; and a transflective mirror that partially transmits and partially reflects light reflected by the filter minor. ## Claims ### Claim 1 A holographic head-up display device comprising: a light source portion configured to emit light, the light being coherent light; an optical modulation portion configured to modulate the light; a relay optical system configured to focus the light; a filter minor that includes a reflection area disposed at a focal position of the relay optical system and configured to reflect light incident through the relay optical system and an absorption area disposed at a periphery of the reflection area and configured to absorb light incident through the relay optical system, the reflection area having a shape defined by the absorption area that is a same shape as a display area of the optical modulation portion; and a transflective minor configured to partially transmit and partially reflect light reflected by the filter minor. ### Claim 2 (depends on 1) The holographic head-up display device of claim 1, wherein a size of the reflection area is the same as a size of an image formed at a focus point of the relay optical system. ### Claim 3 (depends on 2) The holographic head-up display device of claim 2, wherein the size of the reflection area is inversely proportional to magnification of the relay optical system. ### Claim 4 (depends on 2) The holographic head-up display device of claim 2, wherein a shape of the reflection area is the same as that of the image. ### Claim 5 (depends on 1) The holographic head-up display device of claim 1, wherein the shape of the display area of the optical modulation portion and a shape of the reflection area are a quadrangle. ### Claim 6 (depends on 1) The holographic head-up display device of claim 1, wherein the filter minor has a flat planar shape. ### Claim 7 (depends on 1) The holographic head-up display device of claim 1, wherein the filter mirror has a curved shape that is bent with reference to a virtual central axis in one direction, and the reflection area is configured to provide a convex reflective side with respect to light incident from the optical modulation portion. ### Claim 8 (depends on 1) The holographic head-up display device of claim 1, wherein the filter minor is configured to have a convex hemispherical shape with respect to light incident from the optical modulation portion, and the reflection area is configured to provide a convex hemispherical reflective side with respect to light incident from the optical modulation portion. ### Claim 9 (depends on 1) The holographic head-up display device of claim 1, wherein diffraction images are formed in the absorption area. ### Claim 10 A holographic head-up display device comprising: an optical modulation portion configured to modulate incident light; a relay optical system configured to focus the incident light on a focus point; and a filter minor that includes a reflection portion configured to reflect an image formed at the focus point and an absorption portion configured to absorb diffraction noise formed at a periphery of the image, the reflection portion having a shaped defined by the absorption portion that is a same shape as a display area of the optical modulation portion. ### Claim 11 (depends on 10) The holographic head-up display device of claim 10, wherein the reflection portion and the absorption portion are disposed on the same plane of the filter minor. ### Claim 12 (depends on 10) The holographic head-up display device of claim 10, wherein the filter minor is configured to have a convex curved shape with respect to the incident light focused by the relay optical system.