EP2143282A1 - Procédé et dispositif de représentation tridimensionnelle - Google Patents

Procédé et dispositif de représentation tridimensionnelle

Info

Publication number
EP2143282A1
EP2143282A1 EP07856030A EP07856030A EP2143282A1 EP 2143282 A1 EP2143282 A1 EP 2143282A1 EP 07856030 A EP07856030 A EP 07856030A EP 07856030 A EP07856030 A EP 07856030A EP 2143282 A1 EP2143282 A1 EP 2143282A1
Authority
EP
European Patent Office
Prior art keywords
pixels
grid
screen
parallax barrier
vertical
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.)
Withdrawn
Application number
EP07856030A
Other languages
German (de)
English (en)
Inventor
Stephan Otte
Markus Klippstein
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.)
Wise Vision Holdings Ltd
Original Assignee
Wise Vision Holdings 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 Wise Vision Holdings Ltd filed Critical Wise Vision Holdings Ltd
Publication of EP2143282A1 publication Critical patent/EP2143282A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/317—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using slanted parallax optics
    • 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
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/31—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers
    • 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
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/31—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers
    • H04N13/312—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers the parallax barriers being placed behind the display panel, e.g. between backlight and spatial light modulator [SLM]

Definitions

  • the invention relates to the field of spatial representation, in particular the spatially perceptible presentation without aids for simultaneously multiple viewers, the so-called autostereoscopic visualization.
  • the invention has for its object to provide a way to autostereoscopic display based on the barrier technology to achieve improved visibility for multiple simultaneous viewers.
  • the index i addresses the rows and the index j addresses the columns on the grid of picture elements x (i, j).
  • the number of 6 or 7 views allows efficient 3D content generation and, on the other hand, creates a good 3D impression.
  • inventive design of an angle of inclination of the transparent portions of the parallax barrier screen of at least 21 degrees the unpleasant moire effects are largely prevented.
  • inventive width of the formed with rectilinear lines transparent sections ensures very good brightness and at the same time very good (monocular) resolution of the perceived 3D image.
  • the parameters for the parallax barrier screen can be easily calculated with the aid of the two equations (1) and (2) known from the aforementioned Kaplan article. This results in all the necessary relations between the distance s between the grid of picture elements x (ij) and the parallax barrier screen, the average human eye distance of 65 mm, the viewing distance, the (horizontal) period length of the transparent sections of the barrier, and the strip width of said barrier transparent sections.
  • the arrangement of the partial image information of different views A (k) on the grid of pixels x (ij) advantageously takes place in a two-dimensional periodic pattern, the period length in the horizontal and vertical directions preferably being no more than 32 pixels x ( i, j). Exceptions to this upper limit of 32 picture elements x (ij) are allowed.
  • the vertical period length is equal to the number n of views shown.
  • the picture elements x (ij) respectively correspond to individual color subpixels (R, G or B) or clusters of color subpixels (eg RG, GB or RGBR or other) or full color pixels, with full color pixels both white blending structures of RGB color subpixels, ie RGB triplets, as well as - depending on imaging technology - actual full-color pixels - as often used in projection screens are meant.
  • the angle which spans the said horizontal and vertical period length of the said two-dimensional periodic pattern as counter and adjacent part should substantially correspond to the angle of inclination of the transparent one Sections on the parallax barrier screen to the vertical correspond. This achieves the best channel separation in 3D display.
  • said horizontal and vertical period length of said two-dimensional periodic pattern should agree with the respective horizontal and vertical period lengths of the transparent portions of the parallax barrier screen except for a correction factor y where 0.98 ⁇ y ⁇ 1, 02.
  • the views A (k) each correspond to different perspectives of a scene or an object.
  • a (k) perceive and create a spatial visual impression.
  • the vertical period length is equal to the number n of views shown.
  • the picture elements x (i, j) respectively correspond to individual color subpixels (R, G or B) or clusters of color subpixels (eg RG, GB or RGBR or other) or full color pixels, with full color pixels including both white mixing entities of RGB color subpixels, ie RGB Triplets, as well as actual full color pixels, as commonly used in projection screens, depending on the imaging technology.
  • the angle subtending the said horizontal and vertical period length of the said two-dimensional periodic pattern as the counter and adjacent part essentially corresponds to the angle of inclination of the transparent portions on the parallax barrier screen with respect to the vertical.
  • said horizontal and vertical period length of said two-dimensional periodic pattern should agree with the respective horizontal and vertical period lengths of the transparent portions of the parallax barrier screen except for a correction factor y where 0.98 ⁇ y ⁇ 1, 02.
  • the image display device may preferably be a color LCD screen, a plasma display, a projection screen, an LED-based screen, an SED screen, or a VFD screen.
  • 6 views are provided with a horizontal period length of 8 picture elements x (i, j).
  • the parallax barrier screen preferably consists of a glass substrate to which the barrier structure is applied on the rear side.
  • the barrier structure is now an exposed and developed photographic film laminated on the backside of the glass substrate, wherein preferably the emulsion layer of the photographic film does not face the glass substrate.
  • the opaque portions of the barrier structure are formed by ink printed on the glass substrate.
  • the parallax barrier screen advantageously contains means for reducing extraneous light reflections, preferably at least one interference-optical antireflection coating.
  • the parallax barrier screen advantageously contains means for reducing extraneous light reflections, preferably at least one interference-optical antireflection coating.
  • the parallax barrier screen is permanently attached by means of a spacer to the image display device, for example, glued or screwed.
  • Fig. 1 shows the schematic structure for implementing the invention
  • Views Fig. 4 Examples of views for a first observer eye on the basis of the
  • Fig. 6 is a scheme for dimensioning the parallax barrier screen.
  • it can also be several observers 3, which gain a spatial impression due to the inventive method.
  • FIG. 2 shows the section of a parallax barrier screen 2 for use in the method according to the invention.
  • This parallax barrier screen 2 contains alternately opaque and transparent sections, the transparent sections according to the invention corresponding to substantially rectilinearly delimited lines which, in the case of parallel projection of the parallax barrier screen 2 onto the grid 1 of picture elements x (i, j) with respect to the vertical direction of the grid 1 of picture elements x (i, j) are inclined by at least 21 degrees and further in the horizontal direction of the grid 1 of pixels x (i, j) each have at least the width of 1.9 pixels x (ij).
  • the said angle of inclination of at least 21 degrees is shown here as angle a; because of the improbability of the drawing, it even appears much larger than 21 degrees.
  • the said required width of the transparent sections can be clearly seen in FIGS. 3 and 4.
  • the parameters for the parallax barrier screen 2 are calculated according to both equations (1) and (2) known from the Kaplan article mentioned at the outset; Example parameters follow below.
  • the height and the width of the picture elements x (i, j) are input parameters.
  • the arrangement of the partial image information of different views A (k) on the grid 1 of picture elements x (ij) advantageously takes place in a strictly two-dimensional periodic pattern.
  • the horizontal period length 8 and the vertical period length comprise six picture elements x (ij), marked as a dashed frame.
  • the image part information for each picture element x (i, j) is derived from the position (i, j) from the corresponding view A (k).
  • picture elements x (ij) respectively correspond to individual color subpixels (R, G or B).
  • the parallax barrier screen 2 is at a distance s in the viewing direction in front of the grid 1 from picture elements x (i, j). arranged.
  • one or more observers 3 each see with two eyes substantially different picture elements x (i, j) and / or parts thereof, whereby both eyes respectively perceive substantially different views A (k) and so that a spatial visual impression arises, as shown in FIGS. 4 and 5.
  • the two eyes of the same observer 3 can even see partial image information of the same view A (k) without destroying the three-dimensional impression.
  • the angle subtending the said horizontal and vertical period length of said two-dimensional periodic pattern as the counter and adjacent part substantially corresponds to the inclination angle a (see FIG. 2) of the transparent portions on the parallax barrier screen 2 from the vertical.
  • the opposing catheter could be defined by the lower horizontal dashed line and the adjacent catheter by the right vertical dashed line.
  • the views A (k) each correspond to different perspectives of a scene or an object.
  • FIG. 1 to FIG. 6 are used.
  • FIG. 2 shows the detail of a parallax barrier screen 2 for use in an arrangement according to the invention.
  • Parallax barrier screen 2 contains alternately opaque and transparent sections, wherein the transparent sections according to the invention correspond to substantially rectilinear lines delimiting the parallel projection of the
  • Parallaxenbarriereles 2 on the grid 1 of pixels x (i, j) with respect to the vertical direction of the grid 1 of pixels x (i, j) are inclined by at least 21 degrees and further in the horizontal direction of the grid 1 from pixels x (i, j ) each have at least the width of 1.9 picture elements x (i, j).
  • the said angle of inclination of at least 21 degrees is shown here as angle a; because of the improbability of the drawing, it even appears significantly larger than 21 degrees (and in practice often greater than 21 degrees).
  • the parameters for the parallax barrier screen 2 are calculated according to both equations (1) and (2) known from the Kaplan article mentioned at the outset; Example parameters follow below.
  • the height and the width of the picture elements x (i, j) are input parameters.
  • the picture elements x (i, j) respectively correspond to individual color subpixels (R, G or B).
  • the assignment of the partial image information of different views A (k) on the grid 1 of picture elements x (ij) advantageously takes place in a strictly two-dimensional periodic pattern.
  • the horizontal period length 8 and the vertical period length 6 comprise picture elements x (i, j) as 6 color subpixels R, G, B, as indicated by the dashed lines in the drawing.
  • the image part information for each picture element x (i, j) is derived from the position (i, j) from the corresponding view A (k).
  • FIGS. 4 and 5 show exemplary views of a first and a second observer eye, respectively, on the basis of the relationships of FIGS. 1 to 3.
  • the parallax barrier screen 2 is at a distance s in the viewing direction in front of the grid 1 from picture elements x (ij), i. more precisely, in front of the image surface of the LCD screen 1, arranged.
  • one or more observers 3 each see with two eyes substantially different picture elements x (j, j) and / or parts thereof, whereby both eyes respectively perceive substantially different views A (k) and so that a spatial visual impression arises, as shown in FIGS. 4 and 5.
  • the two eyes of the same observer 3 can even see partial image information of the same view A (k) without destroying the three-dimensional impression.
  • the angle subtending the said horizontal and vertical period length of said two-dimensional periodic pattern as the counter and adjacent part substantially corresponds to the inclination angle a (see FIG. 2) of the transparent portions on the parallax barrier screen 2 from the vertical.
  • the countercathet would be defined by the lower horizontal dashed line and the adjacent catheter by the right vertical dashed line.
  • Views A (k) respectively different perspectives of a scene or a
  • the parallax barrier screen 2 preferably consists of a glass substrate to which the actual barrier structure is applied on the rear side.
  • the barrier structure is now an exposed and developed photographic film laminated on the backside of the glass substrate, wherein preferably the emulsion layer of the photographic film does not face the glass substrate.
  • the parallax barrier screen 2 advantageously contains means for reducing extraneous light reflections, preferably at least one interference-optical antireflection coating.
  • the parallax barrier screen 2 advantageously contains means for reducing extraneous light reflections, preferably at least one interference-optical antireflection coating.
  • the parallax barrier screen 2 is permanently attached to the image display device 1, for example by gluing or screwing, by means of a spacer in order to maintain the distance s defined above.
  • the color subpixels (R, G, B) are known to correspond in the example to the image display elements x (i, j), the height being about 0.648 mm each and the width being about 0.216 mm.
  • the transparent portions of the parallax barrier screen 2 with respect to the vertical at an inclination angle a 23, 96248897 °.
  • the width e of said sections in the horizontal direction of the grid 1 with the picture elements x (i, j) is 0.4305692 mm and their height I is 0.968781 mm.
  • the horizontal period ze is 1.7222768 mm, and the vertical period zl of the transparent portions is 3.875124 mm.
  • a 32 "NEC LCD3210 LCD screen is used as the image display device instead of the 40" LCD screen.
  • the color subpixels (R, G, B) are used as image display elements x (ij).
  • the inclination angle a of the transparent portions of the parallax barrier screen 2 to the vertical is 23.96248897 ° and the width e of said portions in the horizontal direction of Raster 1 with the picture elements x (i, j) in each case 0.339776 mm and their height I 0.764496 mm.
  • the horizontal period ze is 1.359104 mm and the vertical period zl of the transparent portions is 3.057984 mm (see FIG. 6).
  • the color subpixels (R, G, B) are used as image display elements x (i, j).
  • the angle of inclination a of the transparent portions of the parallax barrier screen 2 with respect to Is vertical 23.96248897 ° and the width e of said sections in the horizontal direction of the grid 1 with the picture elements x (i, j) is 0.175762 mm and their height I is 0.3954645 mm.
  • the horizontal period ze is 0.703048 mm, and the vertical period zl of the transparent portions is 1.581858 mm (see FIG. 6).
  • the advantages of the invention are versatile.
  • the method according to the invention and the corresponding arrangements allow an autostereoscopic display based on the barrier technology, wherein for several viewers an improved perceptibility is achieved by improved image brightness, reduced moiré effects and increased visible (monocular) resolution compared with the prior art, what was desired.
  • the invention can be realized with relatively simple means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne le domaine de la représentation spatiale, en particulier de la représentation perceptible dans l'espace par plusieurs observateurs simultanément sans moyens d'aide, ce que l'on appelle la visualisation autostéréoscopique. L'invention a pour objet de réaliser une possibilité de représentation autostéréoscopique basée sur la technologie de barrière afin de parvenir à une meilleure perception pour plusieurs observateurs simultanés. A cet effet, l'invention concerne un procédé de représentation spatiale avec lequel des informations partielles d'image de différentes vues A(k), k étant égal à 1,..., n et n étant égal à 6 ou 7, sont rendues visibles sur une trame d'éléments d'image x(i,,j) et au moins un écran de barrière parallaxe est placé devant ou derrière la trame d'éléments d'image x(i,,j) à la distance s. L'écran contient une alternance de secteurs opaques et transparents, les secteurs transparents correspondant à des lignes délimitées de manière essentiellement rectiligne, qui, lors d'une projection parallèle de l'écran de barrière parallaxe sur la trame d'éléments d'image x(i,,j), sont inclinées par rapport à la direction verticale de la trame d'éléments d'image x(i,,j) d'au moins 21 degrés et présentent en plus dans la direction horizontale de la trame d'éléments d'image x(i,,j) chacune au moins la largeur de 1,9 élément d'image x(i,,j).
EP07856030A 2007-04-04 2007-11-26 Procédé et dispositif de représentation tridimensionnelle Withdrawn EP2143282A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007016773A DE102007016773B4 (de) 2007-04-04 2007-04-04 Verfahren und Anordnung zur dreidimensionalen Darstellung
PCT/DE2007/002136 WO2008122256A1 (fr) 2007-04-04 2007-11-26 Procédé et dispositif de représentation tridimensionnelle

Publications (1)

Publication Number Publication Date
EP2143282A1 true EP2143282A1 (fr) 2010-01-13

Family

ID=39199976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07856030A Withdrawn EP2143282A1 (fr) 2007-04-04 2007-11-26 Procédé et dispositif de représentation tridimensionnelle

Country Status (6)

Country Link
US (1) US20100046069A1 (fr)
EP (1) EP2143282A1 (fr)
JP (1) JP2010524309A (fr)
CN (1) CN101803393A (fr)
DE (1) DE102007016773B4 (fr)
WO (1) WO2008122256A1 (fr)

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Also Published As

Publication number Publication date
WO2008122256A1 (fr) 2008-10-16
US20100046069A1 (en) 2010-02-25
JP2010524309A (ja) 2010-07-15
DE102007016773A1 (de) 2008-10-09
CN101803393A (zh) 2010-08-11
DE102007016773B4 (de) 2011-12-22

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