EP0226115A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A system for projecting three-dimensional images
Assignee: Individual
•
Filing: 1986-12-02
•
Granted: —
•
Expires: 2006-12-02
Abstract
Abstract A system of three-dimensional projection comprising in combination a screen and a viewer, said viewer embodying a mask containing see-through slits, means for projecting at least two different perspectives on the screen and means for effecting movement of the viewer to traverse the mask from left to right and from right to left such that from a given vantage point, each of the beholder's eyes sees a different perspective view, each of which is formed by the scanning motion of the screen at a rate such as to provide the illusion of an image continuous in both time and space.
Inventors
- 👤 G.B. Kirby Meacham
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 11:01
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/16; H; H04; H04N; H04N13/00; H04N13/30; H04N13/302; H04N13/305; H04N13/31; H04N13/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
201 words
A system for three-dimensional image display comprising an imaging surface upon which there are one or more groups of two or more vertically-oriented, horizontally-moving image stripes formed by projection of two or more different stereoscopically-related images through a horizontally-moving shadow mask, the shadow mask and projector geometry being so adjusted that there are narrow dark bands approximately the width of the stripes between stripes within a group and wider dark bands separating groups, the rapid movement of the shadow mask and image stripes being of sufficient magnitude and rapidity that each of the projected images is scanned in its entirety over a period of time less than the observer's time of persistence of vision, an opaque viewing mask parallel to the imaging surface between the imaging surface and the observer having one vertically-oriented, transparent slit approximately the width of a single image stripe corresponding to each group of image stripes, and means for effecting movement of the mask in consonance with the image stripes such that an observer in position to see image stripes formed by a specific projected image at one point in the movement will see image stripes from this same image at all other points in said movement.
Claim 2
Independent Claim
201 words
A system for three-dimensional image display comprising an imaging surface upon which there are one or more groups of two or more vertically-oriented, horizontally-moving image stripes formed by projection of two or more different stereoscopically-related images through a horizontally-moving shadow mask, the shadow mask and projector geometry being so adjusted that there are narrow dark bands approximately the width of the stripes between stripes within a group and wider dark bands separating groups, the rapid movement of the shadow mask and image stripes being of sufficient magnitude and rapidity that each of the projected images is scanned in its entirety over a period of time less than the observer's time of persistence of vision, an opaque viewing mask parallel to the imaging surface between the imaging surface and the observer having one vertically-oriented, transparent slit approximately the width of a single image stripe corresponding to each group of image stripes, and means for effecting movement of the mask in consonance with the image stripes such that an observer in position to see image stripes formed by a specific projected image at one point in the movement will see image stripes from this same image at all other points in said movement.
Claim 3
Dependent Claim
100 words
A system according to claim 1 in which a single moving image stripe group is formed on an imaging surface and one or more viewing devices, each containing a single vertically-oriented, horizontally-moving, transparent slit of a width such that the slit subtends approximately the same angle as the image stripes from the observer's vantage point and is synchronized with the moving image stripe group, are positioned relative to the imaging surface and the observers such that the observer's view the imaging surface exclusively through an effective opening in the viewing device formed by the locus of instantaneous transparent slit positions.
Claim 4
Independent Claim
250 words
A system for three-dimensional image display comprising an imaging surface consisting of the phosphor-coated face of a cathode ray tube, drive electronics to control the position and intensity of the image-forming electron beam to form one or more groups of two or more vertically-oriented, horizontally-moving image stripes one scan line wide, each stripe consisting of a single line of pixels formed by one vertical stroke of the cathode ray electron beam and each stripe within a group being a component of a different stereoscopically-related image, the electron beam drive electronics so controlled that there are dark bands of width approximately equal to the viewing mask slit width between image stripes within a stripe group and larger dark bands separating stripe groups, the movement of the stripes of sufficient magnitude and rapidity that each of the stereoscopically-related images in its entirety over a period of time less than the observer's time of persistence of vision, an opaque viewing mask parallel to the imaging surface between the imaging surface and the observer having one vertically-oriented, transparent slit of width as aforementioned approximately equal to the dark band within image stripe groups corresponding to each group of image stripes, and means for moving the mask in consonance with the image stripes such that an observer in position to see stripes belonging to a specific member of the set of stereoscopically-related images at one point in the motion cycle will see stripes from this same image at all other points in the motion cycle.
Claim 5
Independent Claim
250 words
A system for three-dimensional image display comprising an imaging surface consisting of the phosphor-coated face of a cathode ray tube, drive electronics to control the position and intensity of the image-forming electron beam to form one or more groups of two or more vertically-oriented, horizontally-moving image stripes one scan line wide, each stripe consisting of a single line of pixels formed by one vertical stroke of the cathode ray electron beam and each stripe within a group being a component of a different stereoscopically-related image, the electron beam drive electronics so controlled that there are dark bands of width approximately equal to the viewing mask slit width between image stripes within a stripe group and larger dark bands separating stripe groups, the movement of the stripes of sufficient magnitude and rapidity that each of the stereoscopically-related images in its entirety over a period of time less than the observer's time of persistence of vision, an opaque viewing mask parallel to the imaging surface between the imaging surface and the observer having one vertically-oriented, transparent slit of width as aforementioned approximately equal to the dark band within image stripe groups corresponding to each group of image stripes, and means for moving the mask in consonance with the image stripes such that an observer in position to see stripes belonging to a specific member of the set of stereoscopically-related images at one point in the motion cycle will see stripes from this same image at all other points in the motion cycle.
Claim 6
Dependent Claim
112 words
A system according to claim 3 in which a single moving image stripe group is formed on a cathode ray tube phosphor face and one or more viewing devices, each device containing a single vertically-oriented, horizontally-moving, transparent slit of a width such that the slit subtends approximately the same angle as the distance between image stripes within the stripe group from the observer's vantage point, this stripe synchronized with the moving image stripe group, these viewing devices positioned relative to the imaging surface and the observers such that the observers view the imaging surface exclusively through an effective opening in the viewing device formed by the locus of instantaneous transparent slit positions.
Claim 7
Dependent Claim
116 words
An improvement in the method of autostereoscopic image display in which vertically-oriented image stripe sets are viewed through vertically-oriented slits in an opaque mask which limit the view of each of the observer's eyes to a different subset of the stripes, these subsets forming different, but sterescopically related images, causing the observer to perceive a stereoscopic impression, the said improvement consisting of interposition of dark zones between stripes in a set, the dark zones having a width approximately equal to the apparent width of the slits from the observer's vantage point, with the result that the observer cannot view any two adjacent stripes simultaneously from a single eye position and, consequently, perceive an unwanted double image.
Claim 8
Dependent Claim
116 words
An improvement in the method of autostereoscopic image display in which vertically-oriented image stripe sets are viewed through vertically-oriented slits in an opaque mask which limit the view of each of the observer's eyes to a different subset of the stripes, these subsets forming different, but sterescopically related images, causing the observer to perceive a stereoscopic impression, the said improvement consisting of interposition of dark zones between stripes in a set, the dark zones having a width approximately equal to the apparent width of the slits from the observer's vantage point, with the result that the observer cannot view any two adjacent stripes simultaneously from a single eye position and, consequently, perceive an unwanted double image.
Claim 9
Dependent Claim
126 words
Rn autostereoscopic television display technique comprising the method of forming M sets of N vertically-oriented, horizontally-moving image lines viewable through vertically-oriented slits in an opaque mask which moves horizontally in consonance with the image lines, this method consisting of repeatedly forming M groups of N vertical image generating strokes on the face of a cathode ray tube comprising, first, separating the groups of strokes by large dark zones and the strokes within a group of strokes by narrower dark zones and, second, effecting horizontal incrementation of the position of the groups of strokes by one pixel spacing with each repetition, with a corresponding change in image line content, with the result that M sets of N lines move horizontally and form N different stereoscopically related images.
Claim 10
Dependent Claim
126 words
Rn autostereoscopic television display technique comprising the method of forming M sets of N vertically-oriented, horizontally-moving image lines viewable through vertically-oriented slits in an opaque mask which moves horizontally in consonance with the image lines, this method consisting of repeatedly forming M groups of N vertical image generating strokes on the face of a cathode ray tube comprising, first, separating the groups of strokes by large dark zones and the strokes within a group of strokes by narrower dark zones and, second, effecting horizontal incrementation of the position of the groups of strokes by one pixel spacing with each repetition, with a corresponding change in image line content, with the result that M sets of N lines move horizontally and form N different stereoscopically related images.
Claim 11
Independent Claim
220 words
A system for three-dimensional image display comprising, a screen, a horizontally-movable mask confronting the screen, said mask containing one or more spaced, parallel, vertically-oriented slits, a projector arranged to project one or more groups of two or more image strips through the slits in the mask onto the screen, the projector and slits in the mask being so positioned relative to each other that there are narrow dark bands approximately the width of the spaces between image strips within a group of image strips and wider dark bands between groups of image strips, means for effecting movement of the mask and image strips through a sufficient distance and fast enough so that each of the projected images is scanned in its entirety over a period of time less than the observer's time of persistence of vision, an opaque mask parallel to the screen between the screen and the observer containing one centrally-located, transparent slit approximately the width of a single image strip corresponding to each group of image strips, and means for effecting movement of the mask in consonance with the image strips such that an observer in a position to see image strips formed by a specific projected image at one point in their movement will see image strips from the same image at all points in said movement.
Claim 12
Independent Claim
220 words
A system for three-dimensional image display comprising, a screen, a horizontally-movable mask confronting the screen, said mask containing one or more spaced, parallel, vertically-oriented slits, a projector arranged to project one or more groups of two or more image strips through the slits in the mask onto the screen, the projector and slits in the mask being so positioned relative to each other that there are narrow dark bands approximately the width of the spaces between image strips within a group of image strips and wider dark bands between groups of image strips, means for effecting movement of the mask and image strips through a sufficient distance and fast enough so that each of the projected images is scanned in its entirety over a period of time less than the observer's time of persistence of vision, an opaque mask parallel to the screen between the screen and the observer containing one centrally-located, transparent slit approximately the width of a single image strip corresponding to each group of image strips, and means for effecting movement of the mask in consonance with the image strips such that an observer in a position to see image strips formed by a specific projected image at one point in their movement will see image strips from the same image at all points in said movement.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.