GB2508406A - Screen with triangular prism array for display of three dimensional (3D) stereoscopic images - Google Patents

Screen with triangular prism array for display of three dimensional (3D) stereoscopic images Download PDF

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Publication number
GB2508406A
GB2508406A GB1221601.6A GB201221601A GB2508406A GB 2508406 A GB2508406 A GB 2508406A GB 201221601 A GB201221601 A GB 201221601A GB 2508406 A GB2508406 A GB 2508406A
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United Kingdom
Prior art keywords
images
screen
metres
dimensional
distances
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GB1221601.6A
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GB2508406B (en
Inventor
Adeyinka Badejoko Oyenuga
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Individual
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Individual
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Priority to GB1221601.6A priority Critical patent/GB2508406B/en
Publication of GB2508406A publication Critical patent/GB2508406A/en
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Publication of GB2508406B publication Critical patent/GB2508406B/en
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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
    • H04N13/356—Image reproducers having separate monoscopic and stereoscopic modes
    • 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
    • H04N13/305—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using lenticular lenses, e.g. arrangements of cylindrical lenses

Abstract

A screen arrangement gives a three dimensional (3D) effect from two primary images, without viewing goggles or headgear (i.e., a glasses-free, autostereoscopic type display) and using parallel light sources. The images can be duplicates (producing flat images in a three dimensional space) or two images taken using a pair of (stereo) cameras, offset from each other by a distance of 5 cm. An exaggerated three-dimensional image will consist of two images that may have a higher offset distance. This screen arrangement is obtained by a screen with vertical triangular prisms formed by placing consecutive strips at an angle of 35° to the surface plane, to form the corrugated (lenticular type) screen. Strips (array elements) may have widths of 0.3 mm thickness (for image viewing distances up to 2.5 metres), 0.5 mm (distances between 2.2 metres and 5 metres), or 0.8 mm for images of 4.5 to about 10 metres; longer distances require greater thicknesses. The prism screen array may be applied to billboards, CRT, LCD or mobile phone displays, virtual reality (VR) and medical image screens.

Description

Description:
The screen arrangement produces three dimensional image effect which can be seen without the use of 3 D goggles or headgear, from two primary images, which can either be duplicates (producing flat images in a three dimensional space), or taken by a pair of cameras offset from each other by a distance of 5 cm (2 inches) while focusing on the same real life image.
The latter produces a more realistic three dimensional effect. An exaggerated 3 dimensional effect will consist of two images that may have a higher offset distance while focusing on the same image, but should not form an angle exceeding 35° with the image.
Where two cameras are used, the left and right cameras produce the left and the right images respectively.
Parallel vertical strips cut from left and right images are arranged to form triangular prisms whose sides form base angles of 35° with the surface plane to form a corrugated screen.
Illustration 1:-The strips from the left and right images form the left and right facing surfaces of the prism respectively Illustration 2:-The width or thickness of the strips depend on the distance from which the screen will be viewed.
The recommended widths for natural eyes are as follows:- 0.3 mm thickness for images of distances of up to 2.5 meters, 0.5 mm thickness for images of between 2.2 meters and 5 meters 0.8 mm thickness for images of 4.5 meters to about 10 meters.
Longer distances will require greater thickness.
These figures may vary when contact lenses or eye glasses are in use by the viewer for correcting long or short sightedness.
Illumination.
A parallel dual light source is essential to sustain a 3 dimensional image as a single light source will result in shadows that will mar the rendition. The sources must be normal to the corrugated surfaces, that is, must strike the screen at an angle which makes the 35 degrees Illustration 3:-This, of course, may not be important if illumination will originate from the screen itself, as in the case of an LCD screen or behind the screen, as in the case of a CRT.
GB1221601.6A 2012-11-30 2012-11-30 Screen arrangement for viewing images and motion in 3D, without goggles or headgear Active GB2508406B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1221601.6A GB2508406B (en) 2012-11-30 2012-11-30 Screen arrangement for viewing images and motion in 3D, without goggles or headgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1221601.6A GB2508406B (en) 2012-11-30 2012-11-30 Screen arrangement for viewing images and motion in 3D, without goggles or headgear

Publications (2)

Publication Number Publication Date
GB2508406A true GB2508406A (en) 2014-06-04
GB2508406B GB2508406B (en) 2016-10-12

Family

ID=50683748

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1221601.6A Active GB2508406B (en) 2012-11-30 2012-11-30 Screen arrangement for viewing images and motion in 3D, without goggles or headgear

Country Status (1)

Country Link
GB (1) GB2508406B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114023A1 (en) * 1991-04-29 1992-11-05 Siegbert Prof Dr Ing Hentschke Visual display providing three=dimensional effect without requiring spectacles - directs images from two cameras using electron guns, through slotted mask and onto screen with lens in front having strip prism form
WO2004036286A1 (en) * 2002-09-20 2004-04-29 Puredepth Limited Multi-view display
JP2005128277A (en) * 2003-10-24 2005-05-19 Noriji Ooishi Stereoscopic image taking device
US20080273083A1 (en) * 2004-10-07 2008-11-06 Pioneer Corporation Stereoscopic Two-Dimensional Display Device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB280449A (en) * 1927-05-24 1927-11-17 Villamosokon Vilagito Reklamva Improvements in advertising signboards
GB357497A (en) * 1929-03-22 1931-09-24 Jules Alfred Delphin Jourdain Improvements in or relating to apparatus for signalling, advertising and like purposes
US4235515A (en) * 1978-06-29 1980-11-25 Rudell Elliot A Stereoscopic viewing system
US4772094A (en) * 1985-02-05 1988-09-20 Bright And Morning Star Optical stereoscopic system and prism window
JP3526157B2 (en) * 1996-12-24 2004-05-10 株式会社日立製作所 Directional reflective screen and image display device
WO2002065192A1 (en) * 2001-02-12 2002-08-22 Greenberg, Edward Lcd screen overlay for increasing viewing angle, improving image quality, line doubling, and de-polarization, and stereoscopic system utilizing such an overlay

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114023A1 (en) * 1991-04-29 1992-11-05 Siegbert Prof Dr Ing Hentschke Visual display providing three=dimensional effect without requiring spectacles - directs images from two cameras using electron guns, through slotted mask and onto screen with lens in front having strip prism form
WO2004036286A1 (en) * 2002-09-20 2004-04-29 Puredepth Limited Multi-view display
JP2005128277A (en) * 2003-10-24 2005-05-19 Noriji Ooishi Stereoscopic image taking device
US20080273083A1 (en) * 2004-10-07 2008-11-06 Pioneer Corporation Stereoscopic Two-Dimensional Display Device

Also Published As

Publication number Publication date
GB2508406B (en) 2016-10-12

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