WO2003012526A1 - Dispositif d'affichage d'images autostereoscopiques en couleurs - Google Patents
Dispositif d'affichage d'images autostereoscopiques en couleurs Download PDFInfo
- Publication number
- WO2003012526A1 WO2003012526A1 PCT/FR2002/002759 FR0202759W WO03012526A1 WO 2003012526 A1 WO2003012526 A1 WO 2003012526A1 FR 0202759 W FR0202759 W FR 0202759W WO 03012526 A1 WO03012526 A1 WO 03012526A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pixels
- screen
- triplets
- stereoscopic vision
- elements
- Prior art date
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
- H04N13/305—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using lenticular lenses, e.g. arrangements of cylindrical lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving 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
-
- 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
- H04N13/324—Colour aspects
-
- 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
- H04N13/366—Image reproducers using viewer tracking
- H04N13/373—Image reproducers using viewer tracking for tracking forward-backward translational head movements, i.e. longitudinal movements
-
- 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
- H04N13/366—Image reproducers using viewer tracking
- H04N13/376—Image reproducers using viewer tracking for tracking left-right translational head movements, i.e. lateral movements
-
- 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
- H04N13/366—Image reproducers using viewer tracking
- H04N13/38—Image reproducers using viewer tracking for tracking vertical translational head movements
-
- 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
- H04N13/398—Synchronisation thereof; Control thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/20—Image signal generators
- H04N13/204—Image signal generators using stereoscopic image cameras
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/20—Image signal generators
- H04N13/286—Image signal generators having separate monoscopic and stereoscopic modes
-
- 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]
- H04N13/334—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using spectral multiplexing
-
- 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
- H04N13/349—Multi-view displays for displaying three or more geometrical viewpoints without viewer tracking
-
- 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
- H04N13/366—Image reproducers using viewer tracking
- H04N13/368—Image reproducers using viewer tracking for two or more viewers
Definitions
- the present invention relates to a stereoscopic vision system comprising a flat screen composed of pixel triplets and a lenticular network formed of cylindrical lenses placed in front of the screen, a lens being associated each time with one or more columns of pixel triplets, to transmit a left image and a right image intended respectively for the left eye and the right eye of the spectator.
- the stereoscopic vision or the perception of the relief for the human being results from the superposition of two different images received by the eyes of the spectator.
- One of the oldest systems consists in making an image in one color and the other image in another color and using glasses with colored glasses, which let pass only the color intended for the eye associated with this color.
- stereoscopic image vision systems consisting of superimposing the two images and looking at them through a lenticular network made up of a plate formed of vertical cylindrical lenses.
- This system uses the lenses to allow the viewer who is in a specific position, precise vis-à-vis the image covered by the lenticular network, to see with each eye only the image that is intended for him.
- the drawback of such a system is the need for the spectator to position himself at a precise location in front of the screen.
- the search for such a position and the maintenance of the head in such a position is possible for a very short time, for example to see an image through a lenticular network, especially because the effect of curiosity remains lively during this solution is no longer possible for a short stereoscopic vision in front of a screen.
- this enslavement associates the movement of the screen with the movements of the spectator's head which excludes the multiplicity of spectators watching the same scene, for example two or three spectators who would be placed in front of the screen and whose heads would move with necessarily different movements.
- the present invention aims to remedy these drawbacks and proposes to develop a system for stereoscopic viewing of images displayed on a flat screen, making it possible to have a stereoscopic vision whatever the position of the head of the spectator in front the screen or the movements that the spectator can make while looking at the screen.
- the invention relates to a system of the type defined above, characterized in that
- the pixels of the triplets are oriented horizontally
- a mask made up of groups of occultation elements is placed in front of the screen, * each group being associated with a column of triplets to occult the triplets and display only a slice thereof by commanding the element d 'corresponding occultation, - an oculometer locating the position of the spectator's eyes relative to the screen and providing the position information,
- control circuit receiving the position information from the oculometer and generating control signals for controlling the occultation elements of the triplet slices to be released as a function of the instantaneous position of the spectator.
- the stereoscopic vision system according to the invention makes it possible to associate in a precise and almost instantaneous manner, the two stereoscopic images exactly in both eyes of the spectator, whatever the movements that the latter makes with the head.
- This system can also be generalized and makes it possible to associate the two stereoscopic images with the position of the head of several spectators placed in front of the screen.
- the position of the spectator's head (s) can be detected with an oculometer detecting the position of the head with a certain periodicity.
- the same eye tracker can operate in a multiplexed manner.
- the signals generated by the control circuit are signals for triggering or controlling the occultation elements associated with each column of pixels in the form of optical switching devices, for example liquid crystals.
- an occultation element is associated with each column of the pixels of the left image or of the right image.
- the masking elements associated with each spectator eye are in principle different since the angular arrangements of the spectator eyes do not coincide.
- the width of the blackout elements it may be that, in certain cases, the same blackout element is common in the eyes of two spectators.
- the masking elements of the mask groups are easily controlled by the edges of the screen since the occulting elements occupy the entire height of the screen. This makes it possible to apply the control techniques already used for flat screens.
- the mask formed by the groups of occulting elements has been presented as being distinct from the flat screen.
- the flat screen can be directly combined with the mask by dividing the pixels into slices which are separate from each other. A pixel slice (or a column of pixels) then corresponds to an occultation element.
- the stereoscopic vision according to the invention is advantageous not only for leisure applications such as the presentation of films or reports but also for professional applications such as mechanical design or air navigation centers, so as to clearly perceive the shape of 'an object or the arrangement or the distribution of objects in space.
- Embossed vision also improves the human / machine interface in computer science thanks to the facility it offers for viewing the stacking of files or documents on a screen with a three-dimensional vision.
- FIG. 1 is an overall view of the principle of stereoscopic image vision
- FIG. 2 is an overall diagram of the stereoscopic vision system according to the invention
- FIG. 3 is an elementary detail diagram of Figure 2
- - Figure 4 is a detail view of a screen part of the stereoscopic vision system according to the invention.
- FIG. 1 the principle of stereoscopic vision of an image will be explained in general.
- This figure is a "plan" view, that is to say perpendicular to the plane of image I, represented by a line with points or pixels identified by the references PD, PG.
- a network R of lenses L In front of this image I is a network R of lenses L and finally, in front of the assembly, is placed the spectator S represented by his left eye OG and his right eye OD.
- Image I is prepared for a stereoscopic vision and for this it is decomposed into two combined images, one formed by image points PD intended to be seen by the right eye OD and the other by image points PG intended for be seen by the left eye OG.
- image I is covered by a network R of lenses L.
- These lenses are cylindrical lenses schematized by elliptical sections and whose direction of the generator is perpendicular to the plane of the figure. These lenses are oriented vertically.
- This general principle of stereoscopic vision of an image therefore requires that the viewer S is in a precise position in front of the screen. Any other position does not allow him to really perceive stereoscopy.
- the invention aims to free the viewer S from this precise position and allow him to see a stereoscopic image whatever his position in front of the screen, and even if he changes position , which is to be expected.
- FIG. 2 shows the general principle of the stereoscopic vision system according to the invention.
- This system is intended to give a stereoscopic vision of an image displayed on a flat screen such as a video screen.
- This image can be fixed or mobile. It is intended to be viewed by a spectator S placed in front of the screen in a relatively arbitrary position, possibly in the middle of the screen, but not necessarily and at no precise or fixed location. The spectator is represented by his left eye OG and his right eye OD.
- the stereoscopic vision system consists of a screen 1 such as a flat screen on which the image is displayed. This screen is provided with a mask 2 and in front of it a network of lenses 3.
- the screen 1 is implemented by a control circuit 4 by means of a pixel command 5 and a command mask 6.
- the system includes an oculometer 7.
- the screen 1 is formed by triplets of pixels as shown by way of example in FIG. 4. These triplets are distributed in vertical columns each time three colored pixels, superimposed.
- FIG. 2 schematically shows two columns of pixels Pi, Pj juxtaposed or not. These pixels or columns of pixels are covered, on their front face, on the side of the spectator S, by a mask 2 formed of groups Gi, Gj of occultation elements Eil, Ei2, Ei3, Ej l, Ej2, Ej3 associated res - pectively to the column of pixels Pi and to the column of pixels Pj.
- These masking elements are vertical bands, which can be either opaque or transparent.
- These occulting elements are controlled from the mask command 6. This command has the function of neutralizing one of the occulting elements Eil, 2, 3 or Ej l, 2, 3, that is to say say to make it transparent.
- the occulting elements are optical switching devices which can be produced by liquid crystals.
- the assembly formed by the screen and the mask is covered by an array 3 of lenses.
- the number of columns of pixels associated with the same lens L of the array 3 depends on optical considerations. In general we will use the simplest solution associating a lens with a column of pixels but more complicated optical solutions are possible.
- the even order pixel columns will for example be reserved for displaying the image points of the image IMD for the right eye OD and the pixel columns d odd order Pj at the image points of the IMG image intended for the left eye OG.
- This eye tracker 7 determines the coordinates xOG, yOG of the left eye OG and the coordinates xOD, yOD of the right eye OD. This information is transmitted to the control circuit 4.
- the control circuit 4 processes the position information of the left and right eyes OG, OD to determine the mask control signals for the mask control member 6. These signals are mainly control signals of the occulting elements Eil , 2, 3, Ej l, 2, 3 of the groups Gi, Gj to allow the active pixels to send a light ray to the right eye OD and the left eye OG.
- the pixel Pi is a point of the image IMD which must be seen by the right eye OD.
- the control circuit 4 determines the occulting element Eix which must be triggered to allow the passage of a light ray ROD coming from the pixel Pi and which, having passed through the lens L, will reach the right eye OD without also falling on the eye OG.
- the control circuit 4 taking account of the position of the left eye OG in the coordinate system oxy and of the position of the pixel Pj in this same coordinate system, the control circuit 4 determines that of the occultation elements Ej l, 2, 3 which must be neutralized so that the surface of the pixel Pj covered by this occultation element Ej2 can emit a ROG light beam. This light ray, after passing through the lens L, will fall on the left eye OG.
- the precision of the concealment that is to say the precision with which the rays ROD, ROG are intended for each of the two eyes OD, OG of the spectator, without risk that the same ray falls on both eyes, largely depends on the number of masking elements used.
- the movement of the eyes OG, OD will be immediately detected by the oculometer 7 which will supply the new position information (xOG, yOG) and (xOD, yOD) to the control circuit 4.
- the control circuit 4 will determine the occultation elements of each occultation group Gi, Gj of each image IMD, IMG which must be neutralized in order to send light rays from the pixels of each image IMD, IMG towards the eye OD, OG for which this image is intended. It is obvious that the explanation given above about two columns of pixels Pi, Pj applies to all the pixels and groups of masking elements of mask 2 over the entire width of the screen. . It should also be noted that, since the stereoscopic vision is made with a horizontal horizon line, the pixel occultation phenomena will be the same for the same column of pixel triplets, that is to say for all the triplets of pixels of the same vertical column.
- Figure 3 shows, in a slightly different way, the screen with its mask and the lens array. This figure highlights the angle of inclination ⁇ j / OG and ⁇ e / OD of the rays intended for the left eye OG and for the eye must OD.
- FIG. 4 shows a detail of a flat screen of a stereoscopic vision system according to the invention.
- This figure gives an image of the column of order n and of the column of order n + 1 of the pixel triplets. It shows in column n, two superimposed triples corresponding to the red pixel, the green pixel and the blue pixel.
- These pixels are crossed out by occulting elements Gnl, Gn2 ... Gn8 shown apart. In fact, these occulting elements are contiguous and when the occulting elements are not neutralized, the pixels cannot appear through them.
- occultation elements are the same throughout column n.
- occultation elements Gn + 1, l
- These occultation elements are vertical, orthogonal to the pixels formed by rectangular surfaces, elongated in the horizontal direction. This direction of the pixels (or triplets of pixels) is rotated 90 ° relative to the direction of the pixels of current flat screens used in computer science. This change of orientation is necessary because the occulting elements must correspond to the neutral direction of the stereoscopic vision, that is to say the vertical direction, perpendicular to the direction of the horizon.
- the occultation elements are preferably liquid crystals activated or neutralized by a control voltage applied to the two ends of each occultation element concerned, that is to say at the upper vertical end and at the vertical end. bottom of each blackout element beyond the visible part of the screen.
- These masking elements forming the mask are liquid crystals which can be of the same type as those of the screen. It is also possible to use other optical switches to constitute the mask or the occulting elements, for example the ferroelectric LCD technology (also called FLC) which also allows very fast binary optical switching (transparent state / optical state). These items can be very small.
- the screen according to the invention has the advantage of being compact and of operating quickly. It is also possible to combine the mask and the pixels by decomposing the pixels into bands corresponding to the bands which would normally be obscured or visible through the masking elements of the mask. In this case, the pixel / occultation element assembly is replaced by the subdivision of the pixels into slices each ordered separately. Under these conditions, instead of neutralizing one of the occulting elements of a column, the operation of the pixel slice which corresponds to this slice of the column will be controlled in order to have an equivalent system of the system described above. It is particularly interesting to carry out the subdivision of the pixels by subdivision, and particularly in column, of the common electrode (against electrode) to the pixels.
- the method according to the invention, as described above, can be applied to both transmissive type and emissive type screens.
- the technical problem is easier to solve since the mask or the occulting elements correspond to an entire column and the connections for the application of the control signals are made by the edges, as already indicated.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0110386A FR2828370B1 (fr) | 2001-08-02 | 2001-08-02 | Systeme de vision stereoscopique sur un ecran plat |
FR01/10386 | 2001-08-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003012526A1 true WO2003012526A1 (fr) | 2003-02-13 |
Family
ID=8866233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/002759 WO2003012526A1 (fr) | 2001-08-02 | 2002-07-31 | Dispositif d'affichage d'images autostereoscopiques en couleurs |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2828370B1 (fr) |
WO (1) | WO2003012526A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006118483A1 (fr) * | 2005-04-25 | 2006-11-09 | Svyatoslav Ivanovich Arsenich | Systeme de projection stereo |
GB2428361A (en) * | 2005-05-07 | 2007-01-24 | Richard Benedict Gillon | 3D Display using lenticular screen |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0786912A2 (fr) * | 1996-01-26 | 1997-07-30 | Sharp Kabushiki Kaisha | Dispositif d'affichage autostéréoscopique |
EP0836332A2 (fr) * | 1996-10-04 | 1998-04-15 | Siegbert Prof. Dr. Hentschke | Moniteur autostéréoscopique, adaptant la position d'un observateur (PAM) |
-
2001
- 2001-08-02 FR FR0110386A patent/FR2828370B1/fr not_active Expired - Fee Related
-
2002
- 2002-07-31 WO PCT/FR2002/002759 patent/WO2003012526A1/fr not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0786912A2 (fr) * | 1996-01-26 | 1997-07-30 | Sharp Kabushiki Kaisha | Dispositif d'affichage autostéréoscopique |
EP0836332A2 (fr) * | 1996-10-04 | 1998-04-15 | Siegbert Prof. Dr. Hentschke | Moniteur autostéréoscopique, adaptant la position d'un observateur (PAM) |
Non-Patent Citations (1)
Title |
---|
BOERNER R ET AL: "A FAMILY OF SINGLE-USER AUTOSTEREOSCOPIC DISPLAYS WITH HEAD-TRACKING CAPABILITIES", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, IEEE INC. NEW YORK, US, vol. 10, no. 2, March 2000 (2000-03-01), pages 234 - 243, XP000906610, ISSN: 1051-8215 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006118483A1 (fr) * | 2005-04-25 | 2006-11-09 | Svyatoslav Ivanovich Arsenich | Systeme de projection stereo |
CN101461251B (zh) * | 2005-04-25 | 2011-10-19 | 斯维亚托斯拉夫·伊万诺维奇·阿尔塞尼奇 | 立体投影*** |
GB2428361A (en) * | 2005-05-07 | 2007-01-24 | Richard Benedict Gillon | 3D Display using lenticular screen |
Also Published As
Publication number | Publication date |
---|---|
FR2828370A1 (fr) | 2003-02-07 |
FR2828370B1 (fr) | 2003-12-12 |
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