WO2008009586A1 - Steuerbare beleuchtungseinrichtung für ein autostereoskopisches display - Google Patents
Steuerbare beleuchtungseinrichtung für ein autostereoskopisches display Download PDFInfo
- Publication number
- WO2008009586A1 WO2008009586A1 PCT/EP2007/057026 EP2007057026W WO2008009586A1 WO 2008009586 A1 WO2008009586 A1 WO 2008009586A1 EP 2007057026 W EP2007057026 W EP 2007057026W WO 2008009586 A1 WO2008009586 A1 WO 2008009586A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- viewer
- imaging means
- light
- illumination
- lenticular
- Prior art date
Links
Classifications
-
- 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
-
- 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
-
- 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
- H04N13/32—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using arrays of controllable light sources; using moving apertures or moving light sources
-
- 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
-
- 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
- G02B27/0093—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
Definitions
- the invention relates to a transmissive autostereoscopic display with a controllable illumination device, which contains a light modulator acting as a lighting matrix.
- the light emitted by this light is imaged in parallel beams of an imaging means by a display matrix directed to each eye of a viewer as a visibility area, from which a 3D image representation can be seen.
- Image information such as images or image sequences, can be displayed to multiple viewers, either in 2D or 3D mode or in mixed mode.
- Autostereoscopic displays in the document are called displays in which at least one observer can see a 3D image representation without additional aids.
- the display includes an imaging means, which consists of a plurality of imaging elements arranged in a matrix.
- the respective stereo images for realizing a 3D image are displayed on the reproduction matrix in synchronism with the illumination directed in each case at a viewer's eye.
- Position of the respective viewer's eye is determined by a position finder.
- the visibility ranges are changed
- the viewer or viewers are with their eyes in the viewer's room in areas from which an image information on the display can be viewed in three dimensions and are referred to as visibility areas. From these visibility areas, the homogeneity of the representation of the image information on the display should always be ensured and crosstalk to the other eye in the 3D representation avoided. Even if the viewer occupies a new position in the viewer's space in front of the display, the conditions mentioned must continue to apply, giving him information with monoscopic or stereoscopic image content is constantly available in good quality.
- a plurality of lens elements 111 ... 114 in an imaging matrix 110 images switchable point illumination elements 11 ... 46 of an illumination matrix 120 onto the eyes ER, EL of an observer.
- the illuminated by a large-area light source 130 illumination matrix 120 generates per lens element and viewer at least one beam B1 ... B4, which by selective activation of lighting elements 11 ... 46 by a tracking and taxation 160 at the location of the observer eyes to a two-dimensional sweet - Overlay spot (visibility area) S R.
- the illumination matrix 11 O 1, the illumination matrix 120 and the light source 130 together form a controllable sweet-spot unit in the form of a directional backlight for visualizing an image of a transmissive LCD image matrix 140 from positions in the viewer's space which drives the tracking and image control 160, in practice, far more lens elements 111 ... 114 and lighting elements are present.
- pixels or subpixels of an LCD matrix serve as illumination elements.
- the beam bundles B1... B4 flood the image matrix 140 over a large area, which alternately only contains one image of a stereoscopic image sequence of an image signal PSS.
- a position finder 150 determines the number of viewers and the eye positions E R , E L in front of the display.
- the tracking and image controller 160 activates the illumination elements 13, 24, 35 and 46 to visualize the current image.
- the illumination elements 13, 24, 35 and 46 are at different positions with respect to the optical axis of the lens elements following them.
- the tracking and image controller 160 activates other illumination elements to track the respective sweet-spot bundle of eye movement.
- the Stereoco makes the tracking and image control 160 by switching lighting elements synchronously with each frame change, the following image each visible to the corresponding eye of one or all viewers. For the other eye, the picture is unlit during this period and thus invisible. If the presentation of the image sequence of the image matrix for right and left eyes with the synchronized illumination of the corresponding eye is sufficiently fast, the viewer's eyes can no longer resolve the images presented to them temporally. Both eyes see the image sequence as a stereo image.
- each active illumination element 13, 24, 35 and 46 is enlarged in the plane of the eye positions E R or E L to a diameter of at least a few millimeters.
- parallel rays bundle the sweet spot (visibility range) in all figures of this document.
- the beam path deviates slightly from the collimation.
- each beam B1 ... B4 covers at least the extent of the sweet-spot area that is at least as large as a viewer's eye. This allows a viewer to view the entire screen area of the image matrix with homogeneous illumination.
- a tracking system which constantly tracks the viewer movements in the space in front of the display in the largest possible space area and each viewer by means of the control signals of the control unit always its associated image information regardless of its current Position represents. This places great demands on the accuracy of the position finder, on the quality of the individual components of the display as well as on the overall picture quality of the display.
- the illumination device consists of a plurality of self-illuminating or light-irradiated illumination elements.
- Each imaging element is associated with a plurality of lighting elements.
- the illumination elements needed to generate parallel beams for the current viewer position are determined. Even with small deviations in the number of lighting elements to be activated, ie activated slightly too much, disturbances occur in the image.
- the light of the activated illumination elements illuminates not only the associated lenticle, but also the two adjacent lenticles on the right and left of the associated lenticle. This light generates additional secondary parallel beams, which are indeed weaker in their intensity, but can also reach observer eyes.
- the secondary parallel beams have particularly adverse effects on the presentation of the stereo images when multiple viewers want to see in front of the display an SD display. In this case, it happens that a secondary parallel beam of the paraffin beam intended for a right eye falls on a left eye of an adjacent observer and the left eye thereby obtains a right stereo image.
- the object of the invention is to keep the scattering effect of the light as small as possible in an autostereoscopic display when imaging light on observer eyes in order to prevent additional visibility areas and to avoid mutual interference of the stereo images for adjacent eyes, so the crosstalk.
- the object is achieved in that two strip-shaped polarizing films are arranged in the beam path with a distance from each other.
- the polarizing films used have alternating strips with different polarization direction.
- the strips of the same polarization of the first and second strip-shaped polarizing film are congruent in the direction of light in order to direct the light in the intended direction, ie to the current position of the respectively determined viewer's eye.
- the imaging means consists of a lenticular containing a large number of spherical lenticles arranged in parallel and images the light of the illumination elements as a parallel beam bundle through a respective lenticle of the lenticular. It is within the scope of the invention that the imaging means can also be a matrix-like arrangement of microlenses in strip form. Analogously, the strip-shaped polarizing films would be arranged.
- the position of the lighting elements to be activated is advantageously determined by an inverse beam calculation from the respective viewer's eye, whereby the position of the imaging element of the imaging means to be irradiated is determined at the same time.
- the secondary beam suppression solution according to the invention is simple and effective and has proven itself in autostereoscopic displays for several observers. This also makes the tracking more accurate for each viewer in several viewers and the quality of the 3D presentation is improved for each individual viewer.
- controllable illumination device of an autostereoscopic display with time-sequential representation
- Fig. 1 shows the operating principle of the autostereoscopic display schematically in
- FIG. 2 is a schematic representation of a display section with a on a
- FIG. 3 is a schematic representation corresponding to FIG. 2 with arranged in the beam path means for the suppression of the secondary parallel beams according to the invention.
- the invention is based on an autostereoscopic display whose functional principle has already been described in the prior art according to FIG. 1 as far as is necessary for understanding the present invention.
- Fig. 2 the illumination beam path is shown in fragmentary detail in the display.
- the illumination matrix 1 denotes the illumination matrix, which is realized by a light modulator having a multiplicity of matrix-like arranged lines which represent the illumination elements.
- the black areas in the illumination matrix 1 represent the non-activated illumination elements.
- This is followed in the light direction by an imaging device designed as a lenticular 2 with spherical lenticles 3 lying parallel next to one another.
- the light emanating from the column-wise activated illumination elements strikes the lenticular 2. With the inverse ray calculation these lighting elements to be activated were determined according to the current observer position. From the middle of the three spherical lenticles 3 shown, the light is imaged as a parallel beam 4 onto a right or left observer eye not shown here, where it generates a visibility region for the 3D representation.
- the light of the activated lighting elements causes additional secondary parallel beams 5, which are weaker in intensity.
- the light of the secondary parallel beams 5 has the same origin as the parallel beam 4.
- the secondary parallel beams 5 radiate at an angle to the right and left thereof. You can lead to the aforementioned degradation of the image quality when multiple viewers want to see a 3D presentation. In this way, for example, a left eye of a second observer can receive the right stereo image of a first observer, if synchronously a right stereo image is shown time-sequentially controlled with the parallel beam 4. There is a crosstalk of the stereo presentation.
- two strip-shaped polarizing films 6 are arranged in the beam path of the autostereoscopic display to solve the problem.
- the first polarization film 6 follows in the beam path of the light exit surface of the illumination matrix 1 and the second polarization film 6 is arranged in front of the lenticular 2.
- the strips of the same direction of polarization of the first and second polarizing film are congruent.
- the width of the strips of both polarizing films 6 coincides with the width of the lenticule 3 of the lenticular 2.
- the arrows emanating from the activated lighting elements indicate possible light propagation directions.
- the first polarizing film 6 acts as a polarizer and the second polarizing film as an analyzer. The light is polarized when passing through the first polarizing film 6 and passes through the second polarizing film 6 as a parallel beam 4.
Landscapes
- 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)
- Stereoscopic And Panoramic Photography (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009519928A JP5179490B2 (ja) | 2006-07-20 | 2007-07-10 | 自動立体ディスプレイ用の制御可能照明装置 |
US12/374,210 US20100118129A1 (en) | 2006-07-20 | 2007-07-10 | Controllable lighting device for an autostereoscopic display |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006033548A DE102006033548B4 (de) | 2006-07-20 | 2006-07-20 | Steuerbare Beleuchtungseinrichtung für ein autostereoskopisches Display |
DE102006033548.1 | 2006-07-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008009586A1 true WO2008009586A1 (de) | 2008-01-24 |
Family
ID=38577458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/057026 WO2008009586A1 (de) | 2006-07-20 | 2007-07-10 | Steuerbare beleuchtungseinrichtung für ein autostereoskopisches display |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100118129A1 (de) |
JP (1) | JP5179490B2 (de) |
CN (1) | CN101491109A (de) |
DE (1) | DE102006033548B4 (de) |
TW (1) | TWI394983B (de) |
WO (1) | WO2008009586A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013056703A2 (de) | 2011-10-20 | 2013-04-25 | Seereal Technologies S.A. | Anzeigevorrichtung und verfahren zur darstellung einer dreidimensionalen szene |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021119807A1 (en) * | 2019-12-19 | 2021-06-24 | Aye3D Inc. | Method and display system for showing a stereoscopic image |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2296099A (en) * | 1994-12-16 | 1996-06-19 | Sharp Kk | Spatial light modulator |
EP0887692A2 (de) * | 1997-06-28 | 1998-12-30 | Sharp Kabushiki Kaisha | Räumlicher Lichtmodulator und sein Herstellungsverfahren |
US20040057111A1 (en) * | 2001-12-07 | 2004-03-25 | Juan Dominguez Motntes | Double active parallax barrier for viewing stereoscopic imges |
WO2005060270A1 (de) * | 2003-12-18 | 2005-06-30 | Seereal Technologies Gmbh | Autostereoskopische anzeigevorrichtung mit positionsnachführung für mehrere benutzer |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1008887A1 (de) * | 1997-01-22 | 2000-06-14 | DOMINGUEZ MONTES, Juan | Anzeigeschirm für dreidimensionale bilder |
JP4668171B2 (ja) * | 2003-03-31 | 2011-04-13 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 自動立体ディスプレイ |
JP2005274905A (ja) * | 2004-03-24 | 2005-10-06 | Sanyo Electric Co Ltd | 立体映像表示装置 |
-
2006
- 2006-07-20 DE DE102006033548A patent/DE102006033548B4/de not_active Expired - Fee Related
-
2007
- 2007-07-10 JP JP2009519928A patent/JP5179490B2/ja not_active Expired - Fee Related
- 2007-07-10 CN CNA200780027464XA patent/CN101491109A/zh active Pending
- 2007-07-10 US US12/374,210 patent/US20100118129A1/en not_active Abandoned
- 2007-07-10 WO PCT/EP2007/057026 patent/WO2008009586A1/de active Application Filing
- 2007-07-16 TW TW096125954A patent/TWI394983B/zh not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2296099A (en) * | 1994-12-16 | 1996-06-19 | Sharp Kk | Spatial light modulator |
EP0887692A2 (de) * | 1997-06-28 | 1998-12-30 | Sharp Kabushiki Kaisha | Räumlicher Lichtmodulator und sein Herstellungsverfahren |
US20040057111A1 (en) * | 2001-12-07 | 2004-03-25 | Juan Dominguez Motntes | Double active parallax barrier for viewing stereoscopic imges |
WO2005060270A1 (de) * | 2003-12-18 | 2005-06-30 | Seereal Technologies Gmbh | Autostereoskopische anzeigevorrichtung mit positionsnachführung für mehrere benutzer |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013056703A2 (de) | 2011-10-20 | 2013-04-25 | Seereal Technologies S.A. | Anzeigevorrichtung und verfahren zur darstellung einer dreidimensionalen szene |
Also Published As
Publication number | Publication date |
---|---|
DE102006033548B4 (de) | 2009-07-09 |
CN101491109A (zh) | 2009-07-22 |
JP2009544055A (ja) | 2009-12-10 |
US20100118129A1 (en) | 2010-05-13 |
DE102006033548A1 (de) | 2008-01-31 |
TWI394983B (zh) | 2013-05-01 |
JP5179490B2 (ja) | 2013-04-10 |
TW200809261A (en) | 2008-02-16 |
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