WO1979001035A1 - Systeme de vision tridimensionnelle pour projections stereoscopiques - Google Patents

Systeme de vision tridimensionnelle pour projections stereoscopiques Download PDF

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Publication number
WO1979001035A1
WO1979001035A1 PCT/BR1979/000004 BR7900004W WO7901035A1 WO 1979001035 A1 WO1979001035 A1 WO 1979001035A1 BR 7900004 W BR7900004 W BR 7900004W WO 7901035 A1 WO7901035 A1 WO 7901035A1
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WO
WIPO (PCT)
Prior art keywords
stereoscopic
images
numbered line
fitted
ing
Prior art date
Application number
PCT/BR1979/000004
Other languages
English (en)
Inventor
W Mensch
Original Assignee
W Mensch
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 W Mensch filed Critical W Mensch
Publication of WO1979001035A1 publication Critical patent/WO1979001035A1/fr

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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
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing

Definitions

  • This invention refers to five devices interconnected in such a manner as to permit three-dimensio ⁇ nal viewing of film or diapositive stereoscopic pairs suitab ⁇ ly projected, as well as of stereoscopic pair images of films, diaposi ti ves , video-tapes and live program takes, on tele ⁇ vision receivers also suitably transmitted and received.
  • the five devices referred to above are: Alternative Synchronizing Shutter; Alternating Field Circuit; Vertical Synchronism Pick-up Circuit, Alternate Shutter Eyeglasses and Alternate Field Plates.
  • Figure 1 is a simplified drawing of a stereoscopic diapositive or film projector, showing the two
  • OM objectives (1) and the Synchronizing Alternating Synchronize (2) which, like those commonly used in filming or film proje tion units, are free to rotate around their shaft (3) to a suitable position and open up alternatively one objective or 5 the other at a particular frequency so that the two images are never projected at the same time.
  • the electric impulses for operating th Alternating Shutter Eyeglasses in synchronism with the pro ⁇ jector shutter may be obtained from a luminous source in
  • the projector which, through the shutter itself (2) excites one or two LDR's at the frequency of the images projected.
  • the later in turn, control a low powered transmission unit with one or two channels, operating in the 27 MHz band which, as a remote control device, operates in the eyeglass receive
  • Figure 2 contains a schemati csi pl if i ed view of the studio of a television station, adapted for broadcasting of three-dimensional programs.
  • Connected to the cutting table (1) are the stereoscopic film or slide pro
  • Figure 3 depicts an ordinary television 0 unit (1) to which has been adapted a Vertical Synchronism Pick-up Circuit (2) purpose of which is to pick up the verti cal synchronism signal of the television so as to control a one or two-channel low power transmitter operating in the 27 MHz band.
  • the latter like a remote control unit, acts on 35 the Alternative Shutter Eyeglasses unit, figure 4, which are tuned to the same frequency, to supply the electric impulses to the electric magnets of the Alternating Field Plates, Figure 5.
  • Figure 4 shows the Alternating Shutter Eyeglasses.
  • the latter will be seen to consist of an ordi ⁇ nary frame (1) and, instead of the lenses, or together with the latter, an opaque plate (2) with two rectangular slots (3) at the viewing point of the eyes; on this plate, and at each shorter side of the slots, are set the holders for the bearings (4) of the ends of the shafts (5) of the two shutters (6).
  • These shutters are in the form of small rectangular tubes, with the ends of the shafts set in the centers of the shorter sides (5); also attached to the shutters are two small straight permanent magnets (7), parallel to the smaller faces, whose neutral ends coincide with the align ⁇ ment of the axes of rotation and alignment of the lines of force in the gaps of the electric magnets (8), and are at ⁇ tached to the plate (2) alongside the slots (3).
  • the North- South directions of these small magnets (7) form angles which are slightly larger or smaller than 90- to the lines of force of the gaps of the electric magnets, dependent on whether the shutters (6) are open or closed.
  • Attached to the plate (2) and in suitable position are the dampers (9) which restrict the rotary movement of the shutters (6) in both directions.
  • the windings of each electric magnet are connected in series or in parallel so as to form at each electro-magnet (8) one North and one South Pole, when traversed by a direct current.
  • the terminals of the groups of windings of the electric magnets are connected with the receiver of the synchron zing signals.
  • the latter whether assembled separate from the eyeglasses or in the empty spaces of the latter, supply the electric impulses to open and close the shutters alternately, in synchronism with the devices transmitting the synchronizing signals of the stereoscopic film or slide projectors and stereoscopic television units.
  • Figure 5 shows the device termed the Field Alternative Plate set, to be mounted at the front >of the television unit (1), close to the luminescent screen (2). It consists of two plates (3) of about the same size as the screen of the cinescopes; each one has a number of equidistant horizontal slots (4) equal to the number of field lines received. Mounted one in front* of the other and by means of lugs (5), they fit into the guides (6) of a supporting device (7).
  • This support (7) is a rectangular molding which, as already noted, has guides (6) at the shorter sides in which the lugs slide; the upper - portion holds the springs (8) which,"by means of traction, keep the two plates (3) supported on the upper dampers (9); the lower portion is fitted with bottom dampers (9) and the electro ⁇ magnets (10) close to the lower edges of the two plates(3). To these edges, close to the poles of the electro-magnets, the anchors (11) of the latter are attached.
  • each stereoscopic pair is projected in such a manner that the right and-left diapositives are projected alternately by means of the Synchronizing Alternating Shutter, (2) shown in figure 1 , at a certain frequency of images per second.
  • the spectator using the Alternating Shutter Eye-glasses, figure 4, and receiving, through his own set, the synchronism signa of the projection transmitter, sees, also alternately, the right image with the right eye only and the left image with the left eye only, in view of the action of the shutters on the glasses, which open and close at the appropiate times, thus producing a perfect three-dimensional effect.
  • the system is applied in simillar manner: the two cameras, (4) of figure 2 which pick up the scene, are arranged so as to supply stereo copic images, i.e., two images pick up from different angles in line with the technique adopted in stereoscopy.
  • stereo copic images i.e., two images pick up from different angles in line with the technique adopted in stereoscopy.
  • Stereoscopic images may also be obtained with stereoscopic fil es and dia ⁇ positives, (2) in figure 2, and stereoscopic video-tapes, (3) in figure 2.
  • each frame is composed of a pair of stereoscopic fields, i .e., a field of odd lines from one machine and a field of even lines from the other.
  • the televiewer using the Alternating Shutter Eyeglasses, figure 4, who receives via his receiving set the synchronising signals of the transmitter of the Vertical Synchronism Pick-up Circuit, (2) of Figure 3, sees, also alternately, the odd-numbered line fields only with the left eye and the even-numbered fields only with the right eye as a result of the action of the eyeglass shutters which open and close at the appropriate moments causing the concept of three-dimensions of the image to be. a perfect one. Of course, for this effect to be obtained, the luminescence of one field on the cinescope screen must not persist until the commencement -of the ensuing field.
  • the impulses obtained through the Vertical Synchronism Pick-up Circuit, (2) in figure 3 are alternately passed to one or other electro-magnet, (10) of figure 5, dependent on whether the field received is even - or odd - numbered and dependent on whether the signal transmitted to the eyeglasses is right - or left-handed, so that one of the plates, (3) in figure 5, the one at the back, for ins ⁇ tance, is moved downwards to a distance corresponding to that separating two consecutive even or odd line, leaving exposed to view only the odd line field.
  • This sequence is repeated time after time in synchronism with the fields received and with the eyeglass shutters, so that the odd line field is always exposed when the sweeping starts in this field, and when the left eyeglass shutter opens, or ' , on the other hand, when the even line field is exposed, with the commencement of the sweep in this field, with opening of the right eyeglass shutters-.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

Un systeme de vision tridimensionnelle pour projections stereoscopiques, comprend un groupe de dispositifs, Fig. 1 (2, 3, 4) qui permet une projection alternative des images de droite et de gauche de paires de films ou diapositives stereoscopiques, ou une projection alternative de champs de lignes de nombre impair correspondant aux images de gauche et de champs de lignes de nombre pair correspondant aux images de droite des programmes stereoscopiques recus des emetteurs de television de sorte que, sur les ecrans de projection ou appareils de television, une image est montree a chaque fois, soit une image a gauche, une image a droite, ainsi de suite, avec une certaine frequence d'images ou de champs par seconde, permettant au spectateur ou telespectateur qui utilise des lunettes a obturateurs alternatifs, fig. 4 (3-8) synchronises avec les dispositifs de projection ou de televisions de voir avec l'oeil gauche seulement les images de gauche ou champs de lignes de nombre impair, et avec l'oeil droit les images de droite ou champs de lignes de nombre pair, des paires stereoscopiques, a la meme frequence d'images ou de champs par seconde projete s ou emis, donnant l'impression d'images tridimensionnelles, bien que les images soient projetees sur une surface essentiellement a deux dimensions.
PCT/BR1979/000004 1978-05-05 1979-05-03 Systeme de vision tridimensionnelle pour projections stereoscopiques WO1979001035A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR7802814 1978-05-05
BR7802814A BR7802814A (pt) 1978-05-05 1978-05-05 Sistema para visao tridimensional de projecoes estereoscopicas

Publications (1)

Publication Number Publication Date
WO1979001035A1 true WO1979001035A1 (fr) 1979-11-29

Family

ID=4011411

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR1979/000004 WO1979001035A1 (fr) 1978-05-05 1979-05-03 Systeme de vision tridimensionnelle pour projections stereoscopiques

Country Status (3)

Country Link
EP (1) EP0015967A1 (fr)
BR (1) BR7802814A (fr)
WO (1) WO1979001035A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205483A1 (de) * 1982-02-16 1983-08-25 Helmut 7500 Karlsruhe Beyer "verfahren zur aufnahme und wiedergabe von raumbildern, die mit hilfe von polarisierenden lichtfiltern in ein linkes und ein rechtes bild aufgespalten werden"
US4807965A (en) * 1987-05-26 1989-02-28 Garakani Reza G Apparatus for three-dimensional viewing
AU586197B2 (en) * 1985-10-30 1989-07-06 Maxwell G. Maxwell Three dimensional television system
WO2013143308A1 (fr) * 2012-03-31 2013-10-03 京东方科技集团股份有限公司 Lunettes 3d du type à obturateur actif et procédé de fonctionnement associé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2481726C1 (ru) * 2011-11-25 2013-05-10 Борис Иванович Волков Универсальная система телевидения

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US660006A (en) * 1900-07-18 1900-10-16 Eugene Louis Doyen Shutter adapted for use in apparatus for exhibiting or viewing animated pictures.
US1189308A (en) * 1914-08-24 1916-07-04 Michael Francis Sullivan Stereoscopic projection apparatus.
US2214621A (en) * 1940-09-10 Le roy
US2273512A (en) * 1938-03-16 1942-02-17 Geoffrey D Caldwell Viewing instrument for stereoscopic pictures and the like
US2365212A (en) * 1941-10-30 1944-12-19 Oriol Ramon Stereoscopic motion picture device
GB735993A (en) * 1953-06-19 1955-08-31 Louis Charles Queunie Improved stereoscopic television apparatus
US2974562A (en) * 1954-07-09 1961-03-14 Rosenbloom Louis Stereoscopic visualizers
US3621127A (en) * 1969-02-13 1971-11-16 Karl Hope Synchronized stereoscopic system
US3737567A (en) * 1971-10-25 1973-06-05 S Kratomi Stereoscopic apparatus having liquid crystal filter viewer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2214621A (en) * 1940-09-10 Le roy
US660006A (en) * 1900-07-18 1900-10-16 Eugene Louis Doyen Shutter adapted for use in apparatus for exhibiting or viewing animated pictures.
US1189308A (en) * 1914-08-24 1916-07-04 Michael Francis Sullivan Stereoscopic projection apparatus.
US2273512A (en) * 1938-03-16 1942-02-17 Geoffrey D Caldwell Viewing instrument for stereoscopic pictures and the like
US2365212A (en) * 1941-10-30 1944-12-19 Oriol Ramon Stereoscopic motion picture device
GB735993A (en) * 1953-06-19 1955-08-31 Louis Charles Queunie Improved stereoscopic television apparatus
US2974562A (en) * 1954-07-09 1961-03-14 Rosenbloom Louis Stereoscopic visualizers
US3621127A (en) * 1969-02-13 1971-11-16 Karl Hope Synchronized stereoscopic system
US3737567A (en) * 1971-10-25 1973-06-05 S Kratomi Stereoscopic apparatus having liquid crystal filter viewer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205483A1 (de) * 1982-02-16 1983-08-25 Helmut 7500 Karlsruhe Beyer "verfahren zur aufnahme und wiedergabe von raumbildern, die mit hilfe von polarisierenden lichtfiltern in ein linkes und ein rechtes bild aufgespalten werden"
AU586197B2 (en) * 1985-10-30 1989-07-06 Maxwell G. Maxwell Three dimensional television system
US4807965A (en) * 1987-05-26 1989-02-28 Garakani Reza G Apparatus for three-dimensional viewing
WO2013143308A1 (fr) * 2012-03-31 2013-10-03 京东方科技集团股份有限公司 Lunettes 3d du type à obturateur actif et procédé de fonctionnement associé
US9494804B2 (en) 2012-03-31 2016-11-15 Boe Technology Group Co., Ltd. Active-shutter 3D glasses and operating method thereof

Also Published As

Publication number Publication date
EP0015967A1 (fr) 1980-10-01
BR7802814A (pt) 1978-10-10

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