GB2244624A - Three dimensional display system - Google Patents

Three dimensional display system Download PDF

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Publication number
GB2244624A
GB2244624A GB9105712A GB9105712A GB2244624A GB 2244624 A GB2244624 A GB 2244624A GB 9105712 A GB9105712 A GB 9105712A GB 9105712 A GB9105712 A GB 9105712A GB 2244624 A GB2244624 A GB 2244624A
Authority
GB
United Kingdom
Prior art keywords
screen
image system
shutter
images
image
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Withdrawn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
GB9105712A
Other versions
GB9105712D0 (en
Inventor
Michael Ridgway
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9105712D0 publication Critical patent/GB9105712D0/en
Publication of GB2244624A publication Critical patent/GB2244624A/en
Withdrawn legal-status Critical Current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
    • H04N13/32—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
    • 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
    • G02B30/31—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 involving active 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
    • H04N13/20—Image signal generators
    • H04N13/204—Image signal generators using stereoscopic image cameras
    • H04N13/246—Calibration of cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—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
    • H04N13/31—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
    • H04N13/322—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using varifocal lenses or mirrors

Landscapes

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

Abstract

A sequence of images are displayed on a screen 10 and provides a stereoscopic view with the use of a liquid crystal shutter system 12. The shutter system comprises elements A to J which are switched in synchronism with the image sequence thereby producing a horizontally differing view of a scene with differing angles of horizontal viewpoint. A positive aspheric Fresnel lens 11 is positioned at its focal distance from the screen 10. The lens may be replaced by a concave mirror. Several images may appear on the screen at the same time with the appropriate elements eg C, F and I, being open simultaneously. Each element may be allocated a lens, and the lenses may have different powers. <IMAGE>

Description

3-D IMAGE SYSTEM This invention relates to methods of producing stereoscopic images especially in relation to projection systems as in the case of CRT technology.
3-D TV is an exciting concept but most working systems require the viewer to wear special glasses to separate the right/left of the binocular view. Other systems have been proposed such as the use of a lenticular screen but this requires very tight control of scan linearities to ensure that images are correctly registered with the different lenticular elements.
A liquid crystal display has been proposed to display a success ion of whole pictures directionally. at high speed but a problem with this system is that of loss of light caused by the liquid crystal display itself and in order to direct each successive image adequately the slits in the display have to be very narrow requiring a very high degree of resolution.
The present invention provides a screen with a liquid crystal shutter system set at a suitable distance from the screen, and the use of lenses or mirrors can be utilised to change the focal distance of the perceived image.
See Fig 1 in which a positive aspheric Fresnel lens 11 is positioned at its focal distance from the screen 10.
This causes all images that are displayed on the screen to appear optically at infinity.
The view through the lens is segmented by elements A to J of the liouid crystal shutter system 12. (In practice more shutter-elements are envisaged.) A sequence of images are displayed on the screen in rapid succession and the shutter-elements are switched in synchronism with the image series. Sach element represents an angle of view of the scene and each image that is displayed on the screen is matched to a corresponding element providing a sequence of horizontally differing views of the scene. Thus when the image for viewpoint A is displayed on the screen, all elements are closed except for A providing a view of the image that can only be seen through that element. The same applies to all other elements providing a sequence of horizontally differing views of the scene from A to ;.
As the lens sets the image optically at infinity, identical pictures displayed on the screen will appear as if in the extreme distance, but an image secuence representing a progressively differing horizontal view will cause closer objects to appear further to the left as seen through each consecutive element to the right and further to the right as seen through each consecutive element to the left.
With a high frame-rate set of images appearing in this manner the scene will appear with stereoscpic properties.
several images may appear on the screen at the same time, ie. elements , F and I being open simultaneously with their corresponding images being displayed on the screen followed by another set of images and elements in the same manner. I practice, the number of images that are displayed simultaneously will be the most that can be accomodated within the optical/stereoscopic parameters of any embodiment of the system.
mach element may be allocated an optically separate lens (ie a duplicate centre segment of a positive aspheric sresnel lens) with the images that appear on the screen being aligned accordingly.
The system will work without lenses or lenses of differing powers which can effect depth of field of the perceived image.
lhe screen can be viewed by a concave mirror instead of a lens). The aberrations of a mirror are smaller than a lens so the scene can be viewed from a wider areae Laore than one mirror can be incorporated to reflect the image as required and the LC-shutter system can be positioned wherever optically suitable.

Claims (11)

1 A 3D image system comprising a screen and a liquid crystal shutter system consisting of a number of shutter-elements set at a suitable distance from the screen.
2 A 3D image system as claimed in Claim 1, in which a sequence of images are displayed on the screen in rapid succession (each image corresponding to a particular shutter-element) and in which the shutter-elements are switched in synchronism with the image series producing a horizontally differing view of the scene with differing angles of horizontal viewpoint.
3 A 3D image system as claimed in Claims 1 and 2, in which the images displayed on the screen are set optically at infinity with the use of a positive aspheric Fresnel lens.
4 A 3D image system as claimed in Claims 1 and 2 or 3, but in which a number of images are displayed on the screen sinu'taneously a s,* .ched in synchronism with a number of shutter-elements being opened simultaneously; the number of images being displayed and the number of shutter-elements being open being that which can be accommodated within the optical/stereoscopic parameters of any particular embodiment of the system.
5 A 3D image system as claimed in Claims 1, 2 or 4 in which lenses of different powers are utilized.
6 A 5D image system as claimed in Claims 1, 2, 4 or 5, in which each shutter-element is allocated an optically separate lens.
7 A 3D image system as claimed in Claim 6, in which a duplicate centre segment of a positive aspheric Fresnel lens is allocated for each shutterelement.
8 A 5D image system as claimed in Claims 1 and 2, in which the screen in viewed indirectly via a concave mirror.
9 A 3D image system as claimed in Claim 8, but in which more than one mirror is incorporated.
10 A 5D image system as claimed in any preceding Claim, in which projected images are brought about utilizing CRT tschnoZogy.
11 A 5D image system substantially as described herein and with reference to the accompanying drawing.
GB9105712A 1990-03-19 1991-03-18 Three dimensional display system Withdrawn GB2244624A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909006179A GB9006179D0 (en) 1990-03-19 1990-03-19 3-d system

Publications (2)

Publication Number Publication Date
GB9105712D0 GB9105712D0 (en) 1991-05-01
GB2244624A true GB2244624A (en) 1991-12-04

Family

ID=10672879

Family Applications (4)

Application Number Title Priority Date Filing Date
GB909006179A Pending GB9006179D0 (en) 1990-03-19 1990-03-19 3-d system
GB909016983A Pending GB9016983D0 (en) 1990-03-19 1990-08-02 Stereoscopic 3-dimentional display system
GB909026039A Pending GB9026039D0 (en) 1990-03-19 1990-11-30 3-d system
GB9105712A Withdrawn GB2244624A (en) 1990-03-19 1991-03-18 Three dimensional display system

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB909006179A Pending GB9006179D0 (en) 1990-03-19 1990-03-19 3-d system
GB909016983A Pending GB9016983D0 (en) 1990-03-19 1990-08-02 Stereoscopic 3-dimentional display system
GB909026039A Pending GB9026039D0 (en) 1990-03-19 1990-11-30 3-d system

Country Status (1)

Country Link
GB (4) GB9006179D0 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0540137A1 (en) * 1991-10-28 1993-05-05 Nippon Hoso Kyokai Three-dimensional image display using electrically generated parallax barrier stripes
DE4228111C1 (en) * 1992-08-25 1993-06-17 Ice Oelsnitz Gmbh, O-9920 Oelsnitz, De
WO1994017638A1 (en) * 1993-01-22 1994-08-04 Trutan Pty Limited Method and apparatus for use in producing three-dimensional imagery
WO1995014353A1 (en) * 1993-11-19 1995-05-26 Asd (Holdings) Ltd. Colour autostereoscopic display
WO1995014952A1 (en) * 1993-11-23 1995-06-01 Liquid Vision Limited Stereoscopic imaging arrangement and viewing arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145897A (en) * 1983-07-25 1985-04-03 Marvin Louis Pund Stereoscopic display
US4670744A (en) * 1985-03-14 1987-06-02 Tektronix, Inc. Light reflecting three-dimensional display system
US4717949A (en) * 1986-03-07 1988-01-05 Dimension Technologies, Inc. Autostereoscopic display with illuminating lines and light valve
GB2206763A (en) * 1987-07-10 1989-01-11 Adrian Robert Leigh Travis Three dimensional display apparatus
EP0335282A2 (en) * 1988-04-01 1989-10-04 Tomohiko Hattori Three-dimensional photographing and three-dimensional playback device by spatial time-sharing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145897A (en) * 1983-07-25 1985-04-03 Marvin Louis Pund Stereoscopic display
US4670744A (en) * 1985-03-14 1987-06-02 Tektronix, Inc. Light reflecting three-dimensional display system
US4717949A (en) * 1986-03-07 1988-01-05 Dimension Technologies, Inc. Autostereoscopic display with illuminating lines and light valve
GB2206763A (en) * 1987-07-10 1989-01-11 Adrian Robert Leigh Travis Three dimensional display apparatus
EP0335282A2 (en) * 1988-04-01 1989-10-04 Tomohiko Hattori Three-dimensional photographing and three-dimensional playback device by spatial time-sharing method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0540137A1 (en) * 1991-10-28 1993-05-05 Nippon Hoso Kyokai Three-dimensional image display using electrically generated parallax barrier stripes
DE4228111C1 (en) * 1992-08-25 1993-06-17 Ice Oelsnitz Gmbh, O-9920 Oelsnitz, De
US5416509A (en) * 1992-08-25 1995-05-16 Ice Oelsnitz Gmbh Method and apparatus for the generation of a stereoscopic presentation
WO1994017638A1 (en) * 1993-01-22 1994-08-04 Trutan Pty Limited Method and apparatus for use in producing three-dimensional imagery
WO1995014353A1 (en) * 1993-11-19 1995-05-26 Asd (Holdings) Ltd. Colour autostereoscopic display
AU683324B2 (en) * 1993-11-19 1997-11-06 Asd (Holdings) Ltd. Colour autostereoscopic display
US5825337A (en) * 1993-11-19 1998-10-20 Asd (Holdings) Ltd Color autostereoscopic display
WO1995014952A1 (en) * 1993-11-23 1995-06-01 Liquid Vision Limited Stereoscopic imaging arrangement and viewing arrangement
GB2298989A (en) * 1993-11-23 1996-09-18 Liquid Vision Limited Stereoscopic imaging arrangement and viewing arrangement
GB2298989B (en) * 1993-11-23 1997-07-23 Liquid Vision Limited Stereoscopic imaging arrangement and viewing arrangement
US5914810A (en) * 1993-11-23 1999-06-22 Watts; Jonathan Robert Stereoscopic imaging arrangement and viewing arrangement

Also Published As

Publication number Publication date
GB9105712D0 (en) 1991-05-01
GB9006179D0 (en) 1990-05-16
GB9026039D0 (en) 1991-01-16
GB9016983D0 (en) 1990-09-19

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)