WO2008069679A1 - Dispositif de modulateur et appareil pour un système d'affichage tridimensionnel - Google Patents

Dispositif de modulateur et appareil pour un système d'affichage tridimensionnel Download PDF

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Publication number
WO2008069679A1
WO2008069679A1 PCT/NO2007/000429 NO2007000429W WO2008069679A1 WO 2008069679 A1 WO2008069679 A1 WO 2008069679A1 NO 2007000429 W NO2007000429 W NO 2007000429W WO 2008069679 A1 WO2008069679 A1 WO 2008069679A1
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WO
WIPO (PCT)
Prior art keywords
modulator
beams
modulator device
prism
split
Prior art date
Application number
PCT/NO2007/000429
Other languages
English (en)
Inventor
Richard Berglind
Benny Svardal
Original Assignee
Ignis Display As
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 Ignis Display As filed Critical Ignis Display As
Priority to EP07851988A priority Critical patent/EP2095647A4/fr
Priority to JP2009540190A priority patent/JP2010511913A/ja
Priority to CN2007800508604A priority patent/CN101632312B/zh
Publication of WO2008069679A1 publication Critical patent/WO2008069679A1/fr
Priority to NO20092430A priority patent/NO20092430L/no

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0808—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more diffracting elements
    • 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
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • 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]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing

Definitions

  • the present invention is related to line scanning projection display systems, and especially to a three dimensional image generating line scanning projection system comprising a modulator with Tunable Diffraction Grating (TDG) elements and a specially designed prism providing splitting, recombination, or both splitting/recombination of the different colors and/or polarization states of the light source embedded as one component.
  • TDG Tunable Diffraction Grating
  • image projectors and especially digital projectors, have found increased popularity as a tool for presenting a variety of information to an audience.
  • these projectors are used to project a computer-generated image onto a viewing surface.
  • Image projectors allow a user to easily present high-quality images to audiences of a wide range of sizes.
  • these projectors are now often found as permanent fixtures in conference rooms and other meeting facilities.
  • Images projected by typical image projectors generally appear flat and two-dimensional to a viewer, without any representation of depth other than the depth of field of the image. Such a representation may be suitable for many types of applications. However, in some situations, it may be desirable to emphasize features such as depth or texture in an image to a higher degree than what is possible with an ordinary two-dimensional representation.
  • a two-dimensional representation of an image may be given the appearance of depth by representing the image stereographically.
  • These images comprise separate, superimposed left-eye and right-eye images configured to mimic the slight differences in the appearance of a three-dimensional object as viewed by the left and right human eyes due to the geometrical separation of the eyes on the human face.
  • the left-eye and right-eye images, respectively, are presented such that the left-eye image is not perceived by the right eye of a viewer, and the right-eye image is not perceived by the left eye, typically provided for by optical filters worn by the viewer.
  • a stereographic image may be presented in a meeting room environment by using separate image projecting systems to respectively project the left-eye image and the right-eye image. While such a system may be successfully in forming a stereographic image, the cost and the weight of the system may be much higher than that of a single projector. Furthermore, the two projectors may require a relatively difficult and time-consuming optical alignment. Also, such a system may be particularly difficult to move between locations due to the weight and bulk of the two systems, as well as difficult image alignment problems when changing locations.
  • FIG. 1 Another example of prior art 3D imaging systems uses a single projector with an active polarizing sheet positioned between the projector and the screen.
  • the polarizing sheet circularly polarizes the alternating image frames in opposing directions. Viewers wearing the polarized eyewear see a stereo 3D image on the screen as alternating frames viewed by the right and left eye respectively.
  • the polarizing sheet will absorb some light and thus yield a lower light efficiency.
  • displaying alternating frames to different eyes can cause flickering and interlacing artifacts in the image.
  • the response of the display modulator must be twice as fast as the response of a modulator used in a two-projector setup as the refresh rate of the single projector image must be twice as high.
  • EP 0211 596 A disclose an apparatus for producing stereoscopic images comprising a red laser (23) at 610nm, a green laser (24) at 514 run, and a blue laser (25) at 476nm.
  • Light from the lasers (23,24,25) are modulated in a first set of acoustic modulators (26,27,28) in a zero order, and two first orders light beams.
  • the first set of modulators (26,27,28) are adjusted such that the first order light beams has an angle of departure relative to the zero order light beam that is equal for all primary colors.
  • a first set of lenses (30,31,32) directs light from the first set of opto-acoustic modulators (26,27,28) towards a second set of lenses (36,37,38) in addition to a set of stoppers ( 33,34,35) for light that has not been diffracted.
  • the second set of lenses (36,27,38) focus the light towards a point just in front of the beam scanner (52).
  • the light beams (39,40) from second lens (36) are transmitted through a polarization rotor (41) before being transmitted through a polarization splitter (42).
  • a first set of polarized light (43,44) is modulated in a second opto-electronic modulator (47), while a second set of polarized light (45,46), orthogonally polarized relative to the first set of polarized light, is reflected by a reflector (48) towards a third opto-electronic modulator (49).
  • Mirrors (50,51,53) collects the light (43,44,45,46) and directs the collected light towards a first scanner (52), and further through a projection system, wherein a user can view images through glass wear with different polarization filters for each respective eye, the polarization corresponds to the polarizations introduced in the apparatus.
  • GB 2 265 024 A disclose a modulator comprising a first transparent layer (1), a second s deformable layer (5) in a distance (6) from an inner side of the first transparent layer (1).
  • a prism (9) is located above the first transparent layer (1).
  • the deformable layer (5) is deformed by applied signals.
  • US 2004/0008928 A disclose an apparatus (10) separating light (26') with differento wavelengths from an incoming light beam (26).
  • a substrate (12) have a layer structure (14), wherein members of the layer structure (14) have different optical features, providing separation and control of polarization of the light.
  • WO/ 90/03086 A disclose an apparatus (1) for reproducing stereoscopic pictures in as line scanning projection system.
  • the apparatus comprises a multiple of viewing fields (5) with separation units (6) having polarization filters.
  • separation units (6) having polarization filters.
  • a double sided display 14
  • 3D stereoscopic projection has been achieved with single-panel DMD (Digital Micro Mirror Device) systems, in which individual left/right frames for each eye is sequentially displayed.
  • DMD Digital Micro Mirror Device
  • the user is wearing glasses with a shutter functiono synchronized with the projector, only the left eye is allowed to see the displayed image when a "left eye frame" is displayed by the projector, and similar for the right eye, respectively.
  • LCOS Liquid Crystal On Silicon
  • passive polarization filters By matching the orientation of these filters with the left/right output from the projector since the polarization of the light incident on either LCOS modulator is orthogonally polarized.
  • a system providing single chip 3D imaging is proposed, with separation provided by polarization, color bands or a combination of these.
  • tunable diffraction gratings particularly such gratings as described in the Norwegian patent application No. 20054834 are used.
  • the working principle of this tunable diffraction grating is based on light diffraction due to surface modulation of a thin gel layer or a membrane with equal optical and functional characteristics.
  • the basic principles of these modulators are well known and have been used for projection applications since the introduction of the Eidophor project over 60 years ago.
  • a specially designed prism is used to split, recombine, or is used as a combined split/recombination element for the different colors and/or polarization states from the light source that is provided, wherein the solution is provided as a single component.
  • the individual colors and/or polarization states from the light source are guided towards individual modulator sections on a single TDG surface.
  • this concept simplifies the optical system and reduces cost, effort, and investments in the production assembly process.
  • advantages are, but not limited to,o reduced system complexity and cost compared to multi-chip solutions, reduced response speed requirements compared to current single-chip solutions, improved refresh rate etc.
  • Another aspect of the present invention is that it is possible to provide stereoscopic imaging by using a combination of polarization and color split.
  • An effect of thiss . property is that individual images may be presented to different groups of viewers, for example by providing a "presenter's mode" where the presenter has access to more image content than the audience.
  • Figure 1 illustrates an example of embodiment of a modulator device according to theQ present invention based on polarization split.
  • Figure 2 illustrates another example of embodiment of a modulator device according to the present invention based on polarization split.
  • Figure 3 illustrates an example of embodiment of a color projection system comprising a modulator design according to figure 2.
  • Figure 4 illustrates another example of embodiment of a modulator device according to the present invention based on chromatic split.
  • Figure 5 illustrates another example of embodiment of a modulator device according to the present invention based on chromatic and polarization split.
  • An aspect of the present invention is to use a TDG modulator comprising a set of5 electrodes located in a functional distance from a gel, membrane or polymer etc. such that a diffraction grid is formed on the surface of the gel or membrane etc. when appropriate voltages are applied on the electrodes.
  • TDG modulators comprising several groups of independent electrodes can be incorporated in a functional distance from the gel or membrane, thereby providing individual diffraction of light incident on the different parts of the surface of the gel or membrane situated above the individual groups of electrodes, respectively.
  • splitting and providing polarization of an incoming light beam, for example a laser, and then guiding the polarized light beams towards respective parts of the gel or membrane surface of a TDG component makes it possible to modulate images for left and right eyes, respectively.
  • Optics for example arranged before the modulator and/or after the modulator provides the devices necessary to achieve a 3D projection system.
  • such modulators may be arranged as a single chip component.
  • Figure 1 illustrates an example of a single chip embodiment of a modulator device according to the present invention based on polarization split.
  • Laser light, 1 is incident on the modulator prism.
  • the light is reflected off a polarizing filter, 2, which divides the beam into two separate polarized beams, Is and Ip, with their individual polarization states orthogonal with respect to each other.
  • Each beam is incident on separate modulating parts of the single TDG modulator surface, 4.
  • Different grid patterns provided by voltages applied on the electrodes 3 s and 3p makes it possible to control the angles of the diffracted laser light beams respectively, and the 3D effect can be obtained by viewing the diffracted light as known to a person skilled in the art through appropriate optics.
  • Figure 2 illustrates another example of embodiment of a single chip modulator device according to the present invention based on polarization split.
  • Red, green, and blue laser light, 5, is incident on the modulator prism.
  • the light is reflected off a stack of polarizing chromatic filters, 2.
  • the effect of the reflection is that the incident light, 5, is divided into six separate beams, 4R S , 4R p , 4G S , 4G P , 4B S , and 4B P .
  • Each beam is characterized by a unique combination of wavelength and polarization state.
  • the polarization states of each wavelength are orthogonal with respect to each other.
  • Each beam is then incident on separately modulating parts of the TDG modulator surface, 4.
  • Figure 3 depicts an example of a 3D display system according to the present invention comprising the modulator depicted in figure 2.
  • the different laser colors, R, G, and B are coaxially aligned with the aid of two dichroic filters (other components, e.g., an X- prism can also be used to perform this alignment), 9R and 9G and guided through beam-shaping relay optics (common to all colors), 10, to the modulator, 11, which splits
  • a schlieren stop, 13 is used to filter out unwanted diffraction orders and a scanning mirror, 14, is used to generate an overlay of two 2D-images with orthogonal polarization properties on a polarization maintaining screen, 15.
  • a 3D-image is produced with the aid of passiveo polarizing spectacles worn by the viewer.
  • the individual glasses of the spectacles polarize the passed light orthogonally with respect to each other and are configured with reference to the polarizing stack in the modulator so that light from one of the projected images reaches only the viewers left eye, while light from the other projected image reaches only the viewers right eye.
  • the stereographic effect when the left eye sees as different image than the right eye produces a three-dimensional image, as known to a person skilled in the art.
  • Figure 4 illustrates another example of embodiment of a modulator device according to the present invention based on chromatic split.
  • Six coaxially aligned laser beams withQ different wavelengths (two red, two green, and two blue), 7, are incident on the modulator prism.
  • the light is reflected off a stack of chromatic filters, 8.
  • the effect of the reflection is that the incident light, 7, is divided into six separate beams, 7R 1 , 7R 2 , 7G 1 , 7G 2 , 7B 1 , and 7B 2 with different wavelengths.
  • Each beam is then incident on separately modulating parts of the single TDG modulator surface, 4.
  • Different grid 5 patterns provided by applied voltages on the electrodes 3R 1 , 3R 2 , 3G 1 , 3G 2 , 3B 1 , and 3B 2 make it possible to control the angles of the diffracted laser light beams of separate (or different) wavelengths.
  • Two overlaid 2D images are projected on a screen using similar projection optics as in the projection system depicted in figure 3.
  • a 3D-image is produced with the aid of passive filtering spectacles worn by the viewer.
  • the individualo glasses of the spectacles passes different wavelengths so that the right eye (for example) sees the image produced with the colors 7R 1 , 7G 1 , and 7B 1 , while the left eye (for example) sees the image produced with the colors 7R 2 , 7G 2 , and 7B 2 .
  • the stereographic effect when the left eye sees a different image than the right eye produces a three- dimensional image, as known to a person skilled in the art. 5
  • Figure 5 illustrates another example of embodiment of a modulator device according to the present invention based on chromatic and polarization split.
  • Six coaxially aligned laser beams with different wavelengths (two red, two green, and two blue), 16, are incident on the modulator prism.
  • the light is reflected off a stack of chromatic and polarizing filters, 17.
  • the effect of said reflection is that the incident light, 16, is divided into twelve separate beams, 16R ls , 16R lp , 16G ls , 16G lp , 16B ls , 16B lp , 16R 2s , 16R 2p ,
  • Each beam has a unique combination of wavelength and polarization state.
  • the polarization states of each wavelength are orthogonal with respect to each other.
  • Each beam is characterized by a unique combination of wavelength and polarization state.
  • the polarization states of each wavelength are orthogonal with respect to each other.
  • Each beam is then incident on separatelyo modulating parts of the single TDG modulator surface, 4.
  • Different grid patterns provided by applied voltages on the electrodes 3R ls , 3Ri p , 3G ls , 3G lp , 3B ls , 3B lp , 3R 2s , 3R 2p , 3G 2s , 3G 2p , 3B 2s , and 3B 1 makes it possible to control the angles of the diffracted laser light beams, respectively.
  • Four overlaid 2D images are projected on a polarization maintaining screen using similar projection optics as in the projection system depicteds in figure 3.
  • a 3D-image is produced with the aid of passive filtering spectacles worn by the viewer.
  • the individual glasses of the spectacles pass different wavelengths in combination with different polarization states.
  • the right eye of one viewer sees the image produced with the color and polarization combinations, for example 16R ls , 16G ls , and 16B ls , while the left eye sees the image produced with the color and0 polarization combinations, for example 16R 2s , 16G 2S , and 16B 2s .
  • the right eye of another viewer wearing different spectacles sees the image produced with the color and polarization combinations, for example 16R lp , 16G lp , and 16B lp , while the left eye sees the image produced with the color and polarization combinations, for example 16R 2p , 16G 2p , and 16B 2P .
  • the stereographic effect when the left eye sees a different image thanS the right eye produces a three-dimensional image for each viewer. Since four different 2D images are overlaid, two different 3D images can be presented to viewers wearing different spectacles. This could have numerous applications, e.g., multitask-use where individual images comprising information is presented to different groups of viewers, for example a "presenter's mode" where the presenter has access to more image content0 than the audience.
  • An aspect of the present invention is to utilize the properties of the TDG modulator to provide at least two groups of electrodes related to each state of the light constituting the image to be displayed, by applying appropriate voltages on the electrode groups,5 respectively, for controlling the angle of each diffracted laser light beam before being passed through display optics and a scanning mirror arrangement, for example.
  • the angle of each diffracted light beam is controlled by the geometry of the electrode pattern related to that diffracted light beam, respectively.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Polarising Elements (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)

Abstract

L'invention concerne un modulateur et un appareil comprenant le modulateur comprenant un composant de réseau de diffraction accordable (TDG) qui est disposé avec une pluralité de sections de modulateurs individuels, un prisme avec des filtres chromatiques et de polarisation appropriés fournissant au moins deux images bidimensionnelles superposées indépendantes fournissant des dispositifs d'affichage stéréographiques pour des images tridimensionnelles.
PCT/NO2007/000429 2006-12-04 2007-12-04 Dispositif de modulateur et appareil pour un système d'affichage tridimensionnel WO2008069679A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP07851988A EP2095647A4 (fr) 2006-12-04 2007-12-04 Dispositif de modulateur et appareil pour un système d'affichage tridimensionnel
JP2009540190A JP2010511913A (ja) 2006-12-04 2007-12-04 三次元ディスプレイ・システムのための変調器デバイスおよび装置
CN2007800508604A CN101632312B (zh) 2006-12-04 2007-12-04 用于三维显示系统的调制器装置和设备
NO20092430A NO20092430L (no) 2006-12-04 2009-06-25 Modulator og apparat for tredimensjonalt fremvisningssystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20065576 2006-12-04
NO20065576 2006-12-04

Publications (1)

Publication Number Publication Date
WO2008069679A1 true WO2008069679A1 (fr) 2008-06-12

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ID=39492434

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Application Number Title Priority Date Filing Date
PCT/NO2007/000429 WO2008069679A1 (fr) 2006-12-04 2007-12-04 Dispositif de modulateur et appareil pour un système d'affichage tridimensionnel

Country Status (6)

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EP (1) EP2095647A4 (fr)
JP (1) JP2010511913A (fr)
KR (1) KR20090099542A (fr)
CN (1) CN101632312B (fr)
NO (1) NO20092430L (fr)
WO (1) WO2008069679A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2009146642A1 (fr) * 2008-06-07 2009-12-10 Wang Yongjing Système de génération d’images composites

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CN102055996B (zh) * 2011-02-23 2013-01-23 南京航空航天大学 基于空间逐层扫描的真三维立体显示系统及其显示方法
CN109544641B (zh) * 2018-11-13 2021-10-15 深圳创维新世界科技有限公司 标定方法及装置
CN113238443A (zh) * 2021-04-29 2021-08-10 深圳市中科创激光技术有限公司 放映机结构及激光投影成像设备

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US6029089A (en) * 1998-07-10 2000-02-22 Pacesetter, Inc. Lead retention and sealing system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009146642A1 (fr) * 2008-06-07 2009-12-10 Wang Yongjing Système de génération d’images composites

Also Published As

Publication number Publication date
NO20092430L (no) 2009-08-24
JP2010511913A (ja) 2010-04-15
CN101632312A (zh) 2010-01-20
KR20090099542A (ko) 2009-09-22
EP2095647A1 (fr) 2009-09-02
CN101632312B (zh) 2012-09-05
EP2095647A4 (fr) 2010-09-15

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