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WO2002031405A2 - Dilatation de faisceau - Google Patents

Dilatation de faisceau Download PDF

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Publication number
WO2002031405A2
WO2002031405A2 PCT/GB2001/004528 GB0104528W WO0231405A2 WO 2002031405 A2 WO2002031405 A2 WO 2002031405A2 GB 0104528 W GB0104528 W GB 0104528W WO 0231405 A2 WO0231405 A2 WO 0231405A2
Authority
WO
WIPO (PCT)
Prior art keywords
area
source
radiation
collimated
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB2001/004528
Other languages
English (en)
Other versions
WO2002031405A3 (fr
Inventor
Niall Anthony Gallen
Timothy York
Adrian Robert Leigh Travis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Screen Technology Ltd
Original Assignee
Screen Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Screen Technology Ltd filed Critical Screen Technology Ltd
Priority to US10/398,972 priority Critical patent/US20040012832A1/en
Priority to EP01974490A priority patent/EP1327102A2/fr
Priority to AU2001294005A priority patent/AU2001294005A1/en
Publication of WO2002031405A2 publication Critical patent/WO2002031405A2/fr
Publication of WO2002031405A3 publication Critical patent/WO2002031405A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise taper

Definitions

  • the present invention concerns the production of a beam of light of large cross-sectional area.
  • a beam is useful in particular for displays, and the invention was conceived in connection with PL-LCDs (photoluminescent liquid-crystal displays) , as described for instance in WO 95/27920 (Crossland et al) .
  • UV light is input to a liquid-crystal modulator which applies image information to the light; the modulated UV light then strikes a RGB phosphor panel to produce a colour display.
  • the input light normally near-visible UV or blue light
  • the input light should be more or less parallel. This gives better electro-optic performance and minimises crosstalk problems (i.e. light from a given modulator pixel striking the wrong phosphor) .
  • a wide angle of view of the ultimate image, normally desirable in displays, is ensured by the near- Lambertian emission characteristics of the phosphors themselves, independently of the input UV light.
  • a large-area collimated source can be produced by collimating the light from a two-dimensional array of point sources with a corresponding array of lenses.
  • the point sources can perhaps be produced by masking a diffuse source.
  • this arrangement is inefficient and entails problems of alignment.
  • the invention relates to the expansion in two dimensions of a well-defined collimated beam of light, which may or may not be apertured.
  • the collimated beam is formed from a point source that has been collimated before being sent through the device of the invention.
  • the idea is related to the reflection of a small two- dimensional beam of light from a large surface area, which is positioned such that the normal to the plane of the reflecting surface is at an angle to the normal to the projected area of the beam. This results in the smaller area of the plane of the collimated wavefront of uniform (or nearly uniform) intensity impinging on the larger area and being distributed across the larger area.
  • a collimated light generator for producing a large-area beam of collimated light from a narrow beam, comprising two stages of tapered reflecting surface, the first reflecting the beam in such a way as to expand it in one dimension, and the second reflecting it in such a way as to expand it in an orthogonal dimension so as to produce a two-dimensionally expanded beam.
  • the tapered surfaces can be, for instance, a series of angled specular facets in a sawtooth formation, essentially splitting the beam into a set of parallel reflected sub-beams. Each of these is then itself split by the second stage to produce a two-dimensional array of sub-beams.
  • the tapered reflectors can have surfaces with diffraction gratings bringing about the desired re-direction of the beam.
  • the input beam can conveniently be produced by a laser, but any small-area source can be used.
  • the light source can be used in liquid-crystal displays, but also for general illumination or for other kinds of modulator.
  • Figure 1 shows the projection of an area through an angle
  • Figure 2 shows the re-direction of incident radiance by a faceted reflecting surface
  • Figure 3 shows the expansion of a collimated beam maintaining polarisation and rotating it;
  • Figure 4 shows two beam-expanding tapers placed orthogonal to one another, in accordance with the invention;
  • Figure 5 shows the effect of changing the pitch of the reflecting facets
  • Figure 6 shows an arrangement similar to Fig. 5 but with further reflecting facets
  • Figure 7 shows an orthogonal tapered beam expander
  • FIG. 8 shows an alternative embodiment
  • Figure 9 shows the illumination of a display device using a beam expander of the invention
  • Figure 10 shows the expansion of a collimated two- dimensional source
  • FIG. 11 shows an embodiment of the invention as applied to PLLCD devices
  • Figure 12 shows a variation of the embodiment of Figure 10 using multiple panels
  • Figure 13 shows an embodiment of the invention as used for fan-out of a beam
  • Figure 14 shows an embodiment of the invention as applied to reflective displays.
  • ⁇ oCA is the flux in the projected area A 1; ⁇ 0 (A 2 ) is the flux arriving at the surface of area A l5 Ej is the radiance of the collimated beam across A t , and E 2 is the radiance of the collimated beam across A 2 . If the angle defined by 3 in Figure 1 is given the symbol ⁇ (Fig. 1) , then the relationship between A 1 and A- is given by geometry as
  • the facets are in this example made to be a series of equally spaced parallel planes, which are angled with respect to A 2 as shown in Figure 2. From equation (ii) , the radiance per unit area on a flat reflecting surface is
  • the fraction of the radiation reflected by each of the facets is E 2 /N.
  • a sectional view of a portion of the incident radiation, 7, is shown in Figure 2 to be incident on a surface comprising a series of parallel facets (9), at an angle ⁇ .
  • the parallel facets extend into the page . Note that if the input beam projected area is not perfectly collimated, the same argument can be applied for each radiance angle individually.
  • the facets are along a fraction of L 2 as described in Figure 1.
  • the fraction of the area of the incoming beam ⁇ a (7) is spread across two individual facets 9 and re-directed by reflection from the angled surface such that ⁇ a is split into two collimated beams which are spatially separated.
  • Figure 3 shows a single faceted taper (or angled surface) with angle ⁇ with respect to the normal to the projected area of the collimated beam with which it is illuminated.
  • This collimated beam may comprise linearly polarised radiation, as is shown in Figure 3.
  • As each fraction of the beam is incident on the faceted surface, it is re-directed and spatially separated according to the separation of adjacent facets.
  • L 2 is depicted in terms of the angle of incidence of the incident radiation with respect to the faceted surf ce.
  • Figure 4 shows the complete scheme in section and in plan.
  • the projected area of the original collimated beam 1 is incident on a faceted surface 11 at an angle to the normal of the surface and re-directed by facets to produce a series of reflected beams 8.
  • This re-directed radiation is then incident on a second angled surface with facets 12, which again re-directs the radiation into a series of reflected beams 13.
  • the facets may be of dimensions such that the areas receiving the incident radiation and the distance between these areas are small in comparison to the smallest area they are intended to illuminate. For instance, in illuminating a two-dimensional array of pixels, the pitch of the reflecting facets as depicted in Figure 5 (P, or P 2 where the distances are measured between adjacent dashed lines) can be made to be smaller than any element in the array.
  • the areas illuminated by the incoming beam 13 in Figure 5 (14 for T? 1 and 15 for P 2 ) represent different fractions of the total area of the facetted surface and are two examples given of the possible structure.
  • the reflecting facets are as in Figure 5 but the structure in between each of the areas of the facets receiving a portion of the incident radiation is now made to be parallel to the incident beam direction 13. These parts are shown as thick black lines 16 .
  • the angle ⁇ can range from 0 to ⁇ , where ⁇ is the angle of incidence with respect to the normal to the plane of the facet array as before.
  • the form depicted in Figure 6 has the advantage that with the entire surface being reflective then the structure can behave as a faceted plane mirror for radiation arriving on the surface 17. This can be used to return ambient light in a reflective- type display while allowing illumination of the same display in low light level environments.
  • the areas 16 between the reflecting facets can be made to be absorbing to reduce scatter or ambient reflections through a device.
  • Figure 7 shows two orthogonal tapers which expand the input beam of rectangular projected area 1 by reflection from a structure which re-directs the radiation, in a direction other than would be achieved using a plane surface 8, using first one surface 18 and then another 19. These surfaces may or may not be orthogonal .
  • the surfaces can be faceted as before ( Figures 3 to 6) or may be in the form of reflection-type diffraction gratings (blazed or unblazed) or in the form of holographic reflection or Bragg gratings. Note that the rotation of a linearly polarised input beam of radiation is shown in the diagram at 20.
  • Figure 8 shows how a series of the devices can be nested in order that a high-intensity large-area source can be achieved from several small-area sources.
  • the primary expanders together produce a continuous input into a large secondary expander, achieved by using angled planes instead of a taper so that the source for one primary expander can be located beneath the adjacent angled plane.
  • the small sources 22 illuminate corresponding tapers 21 while situated beneath a second taper. This allows the production of a composite seamless large area output using a series of small sources. In this case the taper is produced by angling a surface.
  • Figure 9 shows the device used to illuminate an array of shutters 23 such as those utilised in display devices.
  • a small collimated source is spread over the entire input plane of the pixellated light valve.
  • the collimation can be relaxed slightly to get a uniform irradiance.
  • For the PLLCD this is not as important, because radiation arriving at the phosphor causes diffuse emission.
  • light from an ultra-violet emitter may be expanded and directed through the liquid-crystal layer. This can have the beneficial effect of improving the optical response of the liquid crystal . Radiation that is allowed to pass through the liquid-crystal layer will impinge upon the screen phosphors and excite them to lambertian emission.
  • FIG. 10 shows how a pixellated input produces an axially transposed pixellated image at output.
  • Each area in the plane 1 of the source is mapped to an associated position in the output plane la. If the viewer is looking such that the arrows in the diagram are arriving towards the eye then the image is reversed from left to right. In this way, given an appropriate input (i.e. axially reversed) , an image can be expanded using the invention. In this way complete images can be expanded from, for example, a reflective fast bit plane device.
  • the embodiment comprises a small-area modulating means that forms a miniature collimated image which is expanded by application of the orthogonal-taper beam expansion assembly.
  • the image formed using the modulating means may be a colour image using a colour pixellated image or a monochromatic image which may or may not be in the ultra-violet.
  • a diffusing screen or phosphor screen is arranged at the output plane of the device. This is shown schematically in Figure 10.
  • the image that is input into the beam expansion system 1 contains the information that is to be displayed.
  • the modulation positions in the input plane 25 become spatially separated in the output plane 25a for a simple facetted reflection configuration. This is acceptable if the pitch, or distance between such pixellated positions, in the output plane is smaller than the required pitch.
  • the output radiation was depicted as leaving the reflecting structures parallel to the normal of the surface. This need not be the case, though it makes it easier to produce a compact flat source.
  • the angle chosen for the reflection is a function of the design of the reflecting/re-directing surfaces and the input angle of incidence . In some instances the output may be required to be collimated but at an angle to the normal of the final reflecting surface.
  • the first or second reflecting surfaces 18, 19 may be used to produce different spatial and angular distributions using refractive, diftractive or holographic structures that are different at different positions across the surfaces. As an example, the collimated beam arriving at the second surface 19 in
  • Figure 7 from the first re-directing surface 18 could be made to be focussed into an array of spots.
  • the input light may be less than perfectly collimated. That is to say it may have an angular distribution.
  • the output from the first and second face will reflect this distribution: by having an angular distribution in the case of the faceted reflector and having an angular distribution and efficiency of redirection in the case of diffraction or holographic gratings.
  • the input radiation may or may not be made to cover the reflecting surfaces completely.
  • the device including two spatially arranged angled surfaces such that there-direction from both their surfaces results in an expansion of the input beam's projected area and its spatial distribution in two dimensions, including two sets of angled surfaces each of which expand the input beam's projected area and spatial distribution in one dimension, can be used in conjunction with optical elements which collect and manipulate the output.
  • a collimated output impinging on an array of lenses would result in an array of focussed spots.
  • the PL-LCD device which uses a narrow range of excitation wavelengths, may use a single point source expanded to cover all or part of the display area.
  • Several point sources can be expanded as described here and placed side by side to form one large-area source. Specific applications for the expander will now be described.
  • a device such as has been described in the preceding text is used in the PLLCD architecture. The device is used to expand an intense ultra-violet source which emits radiation in the region 350 nanometres to 410 nanometres. This expanded beam is positioned behind a modulator M as depicted in Figure 11.
  • Modulation of the expanded source occurs when it is passed through the combination of layers comprising a polarising layer 26, a liquid-crystal layer 28 sandwiched between two transparent layers 27, a second polariser 29 which is used as an analyser for the modulated radiation and a pixellated phosphor or non-pixellated layer 30 onto which the transmitted modulated radiation signal is incident.
  • a polarising layer 26 By modulating the polarisation direction of the radiation from the source which is transmitted through the polariser 26 the transmission is spatially varied according to the image required at the phosphor layer which may be monochromatic or polychromatic.
  • More than one orthogonal-taper beam expander may be used together to cover the input plane of the modulation scheme .
  • the method described in Figure 8 can be used to illuminate the entire display input plane by illuminating separate areas of the plane using the expanded output of more than one ultra violet source.
  • Figure 12 shows a variation of the device of Figure 10, in which an optical surface which locally diverges the radiation is used. Two such expanded images can be placed side by side so that a tiled composite image is formed.
  • one expansion unit with expanded image 25a of the small input 25 is labelled as before. Behind this is shown a second expansion unit which also produces an image 25a' .
  • a light source plane 1 is placed at the input corner of each expansion unit, accessible via the space behind the taper.
  • the two expanded images are separated by a seam 26 corresponding to the line along which the two units are made to be in contact. In this way a series of expanded images can be used to form a larger image .
  • FIG. 13 Another embodiment of the device is as a component in the generation of an array of outputs from a single input.
  • the input beam of radiation 27 takes the form of a well defined collimated planar wavefront and is reflected/re-directed through the beam expansion component at surfaces 18 and 19 as before.
  • the output is depicted as a large-area plane 28 which is allowed to pass through an optical layer 29 which has, in the Figure, a regular function and which focuses the output from the beam-expanding device to an array of points in a plane 30.
  • An example of the usefulness of such a system would be the generation of an array of inputs of equivalent wavelength and energy which are spatially distributed across a plane for input into a fan-out/fan-in optical switching mechanism.
  • the intensity of the original beam 27 can have a large number of grey-scales imposed on it if the optical element 29 is an array of optical modulators. In this way information can be written to the beam which can then undergo further information processing.
  • Reflective displays are defined as those displays which use illumination from their surroundings to produce information on a screen.
  • One means of achieving this is to reflect light selectively by mechanical means such as a micro-mirror device at required positions across the display area, thereby producing the image.
  • Such a component may be called dynamic.
  • a static version may also exist, e.g. a watch face.
  • the watch front face may be designed to reflect selectively at particular angles or directions without any ability to choose and with no regard to any positioning across the display area.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Polarising Elements (AREA)

Abstract

La présente invention concerne un faisceau de rayonnement aligné sur une grande zone qu'on forme en redirigeant un faisceau de petite zone de projection à partir d'une ou de deux surfaces orthogonales qui présentent des facettes ou qui possèdent un angle de réflexion non spéculaire et qui distribuent dans l'espace le faisceau entrant à travers leur zone de surface. Il existe, de préférence, deux stades de dilatations, un pour chaque dimension. Si le faisceau entré est polarisé linéairement, alors le faisceau de sortie sera aussi polarisé. Cette polarisation effectuera une rotation sur 90 degrés. Ce dispositif de dilatation de faisceau est compact et convient pour des écrans plats à cristaux liquides.
PCT/GB2001/004528 2000-10-11 2001-10-11 Dilatation de faisceau Ceased WO2002031405A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/398,972 US20040012832A1 (en) 2000-10-11 2001-10-11 Beam expansion
EP01974490A EP1327102A2 (fr) 2000-10-11 2001-10-11 Dilatation de faisceau
AU2001294005A AU2001294005A1 (en) 2000-10-11 2001-10-11 Beam expansion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0024945A GB0024945D0 (en) 2000-10-11 2000-10-11 Beam expansion
GB0024945.8 2000-10-11

Publications (2)

Publication Number Publication Date
WO2002031405A2 true WO2002031405A2 (fr) 2002-04-18
WO2002031405A3 WO2002031405A3 (fr) 2003-01-16

Family

ID=9901101

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/004528 Ceased WO2002031405A2 (fr) 2000-10-11 2001-10-11 Dilatation de faisceau

Country Status (5)

Country Link
EP (1) EP1327102A2 (fr)
AU (1) AU2001294005A1 (fr)
GB (1) GB0024945D0 (fr)
TW (1) TW571126B (fr)
WO (1) WO2002031405A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012004016A1 (fr) 2010-07-06 2012-01-12 Seereal Technologies S.A. Élargissement des faisceaux et collimateurs de différents types pour des affichages holographiques ou stéréoscopiques
US9857523B2 (en) 2014-11-24 2018-01-02 Electronics And Telecommunications Research Institute Apparatus for controlling light beam path
CN108153054A (zh) * 2018-01-03 2018-06-12 京东方科技集团股份有限公司 背光模组及显示装置
KR20180072356A (ko) * 2016-12-21 2018-06-29 삼성전자주식회사 백라이트 유닛 및 이를 포함하는 홀로그래픽 디스플레이 장치
US11619825B2 (en) 2019-04-10 2023-04-04 Electronics And Telecommunications Research Institute Method and apparatus for displaying binocular hologram image

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7206107B2 (en) * 2004-12-13 2007-04-17 Nokia Corporation Method and system for beam expansion in a display device

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US4874228A (en) * 1987-03-24 1989-10-17 Minnesota Mining And Manufacturing Company Back-lit display
US5054885A (en) * 1988-10-11 1991-10-08 Minnesota Mining And Manfuacturing Company Light fixture including a partially collimated beam of light and reflective prisms having peaks lying on a curved surface
GB9406742D0 (en) * 1994-04-06 1994-05-25 Crossland William A Thin panel display screen
JPH10260405A (ja) * 1997-03-18 1998-09-29 Seiko Epson Corp 照明装置、液晶表示装置及び電子機器
JP3743990B2 (ja) * 1997-04-10 2006-02-08 オムロン株式会社 面光源装置
JP3379043B2 (ja) * 1998-06-29 2003-02-17 ミネベア株式会社 面状照明装置
US6222971B1 (en) * 1998-07-17 2001-04-24 David Slobodin Small inlet optical panel and a method of making a small inlet optical panel
CN1877191B (zh) * 1998-11-27 2011-08-17 夏普株式会社 照明装置

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012004016A1 (fr) 2010-07-06 2012-01-12 Seereal Technologies S.A. Élargissement des faisceaux et collimateurs de différents types pour des affichages holographiques ou stéréoscopiques
US9395690B2 (en) 2010-07-06 2016-07-19 Seereal Technologies S.A. Beam divergence and various collimators for holographic or stereoscopic displays
US10295959B2 (en) 2010-07-06 2019-05-21 Seereal Technologies S.A. Beam divergence and various collimators for holographic or stereoscopic displays
US11385594B2 (en) 2010-07-06 2022-07-12 Seereal Technologies S.A. Beam divergence and various collimators for holographic or stereoscopic displays
US9857523B2 (en) 2014-11-24 2018-01-02 Electronics And Telecommunications Research Institute Apparatus for controlling light beam path
KR20180072356A (ko) * 2016-12-21 2018-06-29 삼성전자주식회사 백라이트 유닛 및 이를 포함하는 홀로그래픽 디스플레이 장치
EP3339964A3 (fr) * 2016-12-21 2018-10-24 Samsung Electronics Co., Ltd. Unité de rétroéclairage et afficheur holographique la comprenant
US10459288B2 (en) 2016-12-21 2019-10-29 Samsung Electronics Co., Ltd. Backlight unit and holographic display device including the same
KR102739947B1 (ko) * 2016-12-21 2024-12-06 삼성전자주식회사 백라이트 유닛 및 이를 포함하는 홀로그래픽 디스플레이 장치
CN108153054A (zh) * 2018-01-03 2018-06-12 京东方科技集团股份有限公司 背光模组及显示装置
US11619825B2 (en) 2019-04-10 2023-04-04 Electronics And Telecommunications Research Institute Method and apparatus for displaying binocular hologram image

Also Published As

Publication number Publication date
AU2001294005A1 (en) 2002-04-22
EP1327102A2 (fr) 2003-07-16
TW571126B (en) 2004-01-11
WO2002031405A3 (fr) 2003-01-16
GB0024945D0 (en) 2000-11-29

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