WO2007052261A2 - Systeme de projection sur ecran - Google Patents

Systeme de projection sur ecran Download PDF

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Publication number
WO2007052261A2
WO2007052261A2 PCT/IL2006/001253 IL2006001253W WO2007052261A2 WO 2007052261 A2 WO2007052261 A2 WO 2007052261A2 IL 2006001253 W IL2006001253 W IL 2006001253W WO 2007052261 A2 WO2007052261 A2 WO 2007052261A2
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WO
WIPO (PCT)
Prior art keywords
screen
projection
image
optical
unit
Prior art date
Application number
PCT/IL2006/001253
Other languages
English (en)
Other versions
WO2007052261A3 (fr
Inventor
Mark Fireman
Dorian Natan
Steve Kisilove
Original Assignee
Mark Fireman
Dorian Natan
Steve Kisilove
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 Mark Fireman, Dorian Natan, Steve Kisilove filed Critical Mark Fireman
Publication of WO2007052261A2 publication Critical patent/WO2007052261A2/fr
Publication of WO2007052261A3 publication Critical patent/WO2007052261A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/10—Projectors with built-in or built-on screen
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/26—Projecting separately subsidiary matter simultaneously with main image
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/606—Projection screens characterised by the nature of the surface for relief projection

Definitions

  • a screen projection system comprising (I) a screen unit having a light dispersing surface with at least one surface contour inversion point centrally located thereon and (II) a projection unit having an electronic input means for receiving an input image, an electronic processing means for forming an output image of the input image by distorting the input image proportionally to respective distances between an electronic output means and a preponderance of locations on the surface, and the electronic output means for converting the output image into an optical projection wherein the optical projection is pointed at the screen unit.
  • the present invention generally relates to an optical screen projection system having a projector and a screen. More specifically, the present invention relates to a screen projection system having image distortion and respective distinct screen surface shape.
  • Optical projections systems for celluloid film movies and slides have been substantially replaced by modern digital projections systems for the optical projections of video images, computer graphics, television, and the likes.
  • the most common projection system uses a flat screen oriented perpendicular to the axis of the optical projection beam(s).
  • corrective measures for the distortions that occur on the periphery of the screen include using a corrective lens shape, curving the corners of the screen towards the projector in the case of front projection, and curving the corners of the screen away from the viewer in the case of rear projection.
  • the ratio of the distance between the projector lens and the top of the screen on which it projects to the width of the top of said screen is substantially equal to the ratio of the distance between the projector lens and the bottom of said screen to the width of the bottom of said screen.
  • the immersive rear projection display includes two or more electronic projectors (e.g., three) that are positioned behind a curved translucent display screen. The electronic projectors project respective display images adjacent each other onto the display screen.
  • the invention relates to a display device for displaying visual information, comprising: at least one image-forming element; at least one light source for generating a light beam, which in cooperation with the image-forming element produces an illuminated image; optical means for processing the light beam and/or illuminated image; and a projection surface for receiving the illuminated image, wherein the image-forming element is flat and the projection surface forms at least a part of a cylinder wall.
  • An inflatable display includes an inflatable balloon, a projector having a projection lens, an internal support structure that supports the inflatable balloon and the projector so that the projection lens is eccentrically disposed inside the inflatable balloon.
  • the inflatable display also includes an external support structure that supports the internal support structure. Also included is a method to control an inflatable display according to wind conditions. The method includes the steps of operating in a sensing mode, operating in a collapsing mode and operating in a recovery mode.
  • a multi-piece dome is constructed from a plurality of rigid panels and configured to receive a hemispherical optical projection on a truncated spherical inner surface.
  • the inner view surface has a predetermined retro-reflectivity.
  • the multi-piece dome is lightweight, portable, self-supporting, and easily assembled, disassembled and transported from one location to another.
  • a visual workstation for use by a viewer includes a dome having an open front end and a truncated spherical inner dome surface.
  • a work surface is disposed in front of and adjacent the dome front end.
  • the work surface defines a viewer area on a side of the work surface opposite the dome.
  • the viewer area is sized and configured to receive the viewer and is positioned relative to the spherical inner dome surface such that the viewer, when located in the viewer area, may view the spherical inner dome surface.
  • a projector is disposed between the viewer area and the dome. The projector is operative to project a truncated spherical projection onto the inner dome surface.
  • US 6,937,210 Projecting Images On A Sphere - A system for projecting images on an object with a reflective surface.
  • a plurality of image projectors are spaced around the object and synchronized such that each projector projects an individual image whose union on the surface of the object forms a composite image.
  • the composite image displayed totally covers the surface.
  • the object may represent the Earth with the projected images representing topographical features of the Earth. If environmental satellite data, such as data from a Geostationary Orbiting Environmental Satellite System is used, real time weather conditions may be displayed on this Earth representation.
  • the screen includes a Fresnel screen converting the light rays incident from the projection lenses to have predetermined optical directional characteristics in an optical axis direction, and a Lenticular screen, disposed in front of the Fresnel screen and having a curvature corresponding to the Fresnel screen, for forming images from the light rays passing through the Fresnel screen, controlling a view angle, and enhancing an entire screen luminance.
  • the view distance is determined based on a focal length and a curvature radius of the Fresnel screen.
  • US 6,903,871 Reconfigurable Surface A three-dimensional surface shape is produced from input numerical data.
  • the shape of a sheet elastic material is determined by the positions of a matrix of control rods.
  • the position of each of the rods is determined by a computer-controlled' system.
  • Each rod is fitted with two pneumatically controlled locking mechanisms, one for the X coordinate and one for the Y coordinate. When both locks on a particular rod are released the rod is free to move to a new position determined by an elevator. Once all of the rods have been adjusted they are locked in position and the surface has been configured.
  • the surface can be used as a mold for casting a replica or in another application can be used as the screen in an image projection system.
  • the present invention is a projection system.
  • the projection system comprises a plurality of screen segments, each defining a surface in the shape of a toroidal segment having geometric proportions approximating the shape of a predetermined ellipsoidal segment having a first focal point and a second focal point.
  • the screen segments are arranged such that an edge of the surface of one of the screen segments is essentially adjacent along its entire length to an edge of the surface of another screen segment.
  • the projection system also comprises a plurality of projectors equal to the number of screen segments wherein each of said projectors projects an image upon one of the screen segments from the second focal point of the ellipsoidal segment approximated by the screen segment.
  • the screen segments are arranged such that the first focal point of each ellipsoidal segment approximated by the surface of the screen segments essentially coincide with each other.
  • the present invention employs a beam dividing prism corresponding to a size of a single pixel on a screen in order to create a plurality of viewing zones for multi-viewer, in which a prism panel having an 1 -dimensional or 2-dimensional arrangement of a prism cell for dispersing beam in various directions is coupled to the 3 -dimensional image projection screen in order to increase the number of the viewing zones, and in which the number and position of the available viewing zones are determined by the number and a relative position of disperse surfaces in the prism cell.
  • the desired number of the viewing zones can be created by selectively adopting the prism cells, so realizing the 3 -dimensional image display system for multi-viewer.
  • a desktop based projector screen having an inner concave display surface upon which a video image or a series of images is projected with a sense of realism comparable with natural viewing of three-dimensional physical reality.
  • the viewing surface combines three concave sections which are derived from solid figures including a dome, cylinder and a plane.
  • a fiber optic display apparatus consists of a plurality of optical fibers which convey a projected image from an input, or first surface, to a display, or second surface, whose area is greater than or equal to that of the first surface, such that any image projected on to the first surface appears enlarged on the second surface.
  • the second surface is comprised of tiles which attach to adjoining tiles by means of flexible tabs and pliable locator rods in such a fashion as to allow the second surface to follow general contours (e.g. concave or convex), while the optical fiber bundles from each tile are collected into a fixture to form the first planar surface. Because of the modular design of the display it can be assembled or disassembled rapidly.
  • a light-diff-using thin sheet or film is applied to the front of each tile of the second surface to effectively increase the numerical aperture of each fiber, thus producing a uniform wide-angle distribution of light from each fiber end and enabling viewing from any angle in front of the display.
  • a video display system having a projector source for projecting a video image on a screen assembly including a plurality of screen panels having a concave or convex curvature, arranged at varying angles and distance to one another, such that each panel exists at different, intersecting planes in space.
  • An animated video image displayed on the screen assembly appears to pass over the screen panels, undulating along the curved surfaces such that a viewer is provided with the sense that parts of the projected image move independently within the whole at various speeds, depending on the curvature of the screen panels and the relative position of the viewer to the video display system.
  • the instant invention is especially useful in application where the public or private viewing of a still image or of motion image sequences are desirable - particularly for those viewing situations where distortion-transformation of the image is suitable for allowing complex surfaces to be used as screens for receiving a projection which will then be perceived as having substantially natural proportions, even though stereoscopic depth perception of the projected image will improperly align with the surface contours; the otho-photographic perception of the projected image(s) will appear properly (naturally) proportioned.
  • the present invention relates to embodiments of a screen projection system
  • a screen projection system comprising (A) a screen unit having (A.i) a light dispersing surface with at least one surface contour inversion point substantially centrally located thereon and (B) a projection unit having (B. i) an electronic input means for receiving an input image, (B. ii) interfaced to the input means, an electronic processing means for forming an output image of the input image by distorting the input image proportionally to respective distances between an electronic output means and a preponderance of locations on the surface, and (B.iii) interfaced to the processing means, the electronic output means for converting the output image into an optical projection, wherein the optical projection is pointed at the screen unit.
  • the system of the present invention facilitates realistic object appearance on screens, which would otherwise convey perceptual distortion.
  • the projection setup was a projector pointed at a pyramid shaped screen such that the center of the image forms on the point of the pyramid (closest to the projector) and the peripheral portions of the image form on the pyramid nearest its base (furthest from the projector), then one would ordinarily expect to see the image portion on the point of the pyramid appearing small and the image near the base appearing large.
  • an embodiment of the instant system would introduce proportional distortion to the image (prior to projection) such that the image portion directed to the point would be enlarged and the image portion directed to the base would be reduced; and in accordance with the screen shape, likewise all other portions would be morphed proportionally to their respective distance between the screen and the projector.
  • the distortion follow a heuristic: screen portions furthest from the projector contain image portions that have been reduced in size; screen portions closest to the projector contain image portions that have been enlarged in size; and intermediate screen portions have proportional distortions substantially in accordance to their distance from the projector and their distances from the aforementioned furthest and closest screen portions.
  • the core concept of this heuristic effect is to produce an image on the screen that would appear realistically proportioned - either if it were viewed from the vantage of the projector - or more preferably if it were viewed by an observer looking straight at an imaginary plane that bisects the screen so that about half of the screen in front of the plane and about half of the screen in behind the plane and the bisection results in a minimum area of the behind the plane being obscured from the view of the observer by portions in front of the plane. Since most preferred positions of the projector with respect to the screen are set up to avoid screen self- shadowing, these two core concept descriptions should be equivalent. However, according to more obscure embodiments of the instant invention, screen self-showing because of the projector orientation, are allowed.
  • the projection unit must be preset (or reset in real time) to accomplish the requisite distortion of the image(s) to be projected in accordance with the shape of the screen and the respective distance(s) of portions of that screen to the projector.
  • inversion point is generic and not precisely mathematically correct.
  • edge(s) on the screen and in a projection units screen model
  • inversion points will define edge(s) (on the screen and in a projection units screen model) over which the distortion of the processor switches from getting larger to getting smaller, etc.
  • edge(s) on the screen and in a projection units screen model
  • inversion is from the perspective of the distortion that is required by the processor and not strictly from the perspective of the screen surface topology, per se; even thought these will coincide for a proper subset of examples.
  • the present invention relates to embodiments of a screen for use in a screen projection system, the screen comprising a light dispersing surface with at least one surface contour inversion point substantially centrally located thereon.
  • the present invention relates to embodiments of an image processing unit comprising (A) an electronic input means for receiving a digital input image, (B) interfaced to the input means, an electronic processing means for forming a digital output image of the input image by distorting the input image proportionally to respective distances between an optical projection means and a preponderance of locations on a light dispersing surface, the surface substantially as herein described and illustrated, and (C) interfaced to the processing means, an electronic output means capable of interface to a means for converting the digital image to an optical image.
  • the present invention in the context where the projection surface shape is predetermined (known in advance) and the basic geometric relationship between the projector and the surface is predetermined (known in advance) - will allow the images (that are to be projected from the projector onto the surface) to be pre-processed and stored in a convenient electronic data storage media (or even old fashion celluloid).
  • the instant invention also includes a data storage media having a preprocessed imagery stored thereon, specifically for the purpose of projection according to the predetermined projection with screen surface relationship.
  • a projection system including a projector and a complex surface shape screen in predetermined geometric relationship there-between
  • capable of using the preprocessed imagery as stored on the data storage media - is also considered to be an integral expressing embodiment of the instant invention.
  • a screen projection system comprising [Sub-System ONE] (I) a screen unit having a light dispersing surface with at least one surface contour inversion point centrally located thereon and (II) a projection unit having an electronic input means for receiving an input image, an electronic processing means for forming an output image of the input image by distorting the input image proportionally to respective distances between an electronic output means and a preponderance of locations on the surface, and the electronic output means for converting the output image into an optical projection wherein the optical projection is pointed at the screen unit; wherein the means for receiving an image receive [Sub-System TWO] an image having a predetermined distortion that is proportional to respective distances between an electronic output means and a preponderance of locations on the surface — such that the distortion of the output image by the projections means is a direct result of the nature of the distorted input and not necessarily a result of any special optical distortion
  • Sub- System TWO is a remotely located processing means that takes an ordinary image and reprocesses it to have the necessary distortion to comply with the relationship between the projection means and the screen contour. Then there is provided a data transfer means between Sub-System TWO and the means for receiving an image of Sub-System ONE - such as a CD or DVD disk or an Internet download or even an old fashion celluloid film strip , or the likes; wherein the data transfer means includes the encoding or impression of the image with the predetermined distortion.
  • the data transfer means is for a large series of images (e.g. movie or interactive video game) while according to an ordinary embodiment the data transfer means is for a sing image or a collection of images (e.g. a photo or a slide show).
  • Basic embodiments of the instant invention simply demand a new use for known image distortion algorithms and software. What is required is to carefully match the screen shape and the projection-to-screen attitude to the distortion algorithm parameters. Intermediate embodiments are those that require coordination of multiple projectors. More advanced embodiments are those that give rise to complex screen surface shapes; while most advanced embodiments are those require screen and/or projector motion detection for live or predetermined updating of the algorithm parameters.
  • each scale embodiment of the instant invention is essentially the composite cost of known off-the-shelf type components - which means that the scale of the application is as cost effective as the application that it comes to innovate.
  • On a grand scale one may use a building exterior from any angle as a screen surface - so long as the optical scattering of the material is adequate for viewing (white brick good, shiny glass bad, etc.).
  • These grand scale embodiments require super high illumination projectors - which are typically expensive.
  • the distortion transformation algorithms are scale independent.
  • first intermediate scale example one may use the interior walls and/or ceiling of a theater, conference lobby, or living room as a screen surface - again so long as the surface treatment is adequately optically dispersing.
  • second intermediate scale example one may have specially constructed volume enclosing screens fabricated. These screens may be for acceptance of back projection or front projection.
  • These screens may have heretofore peculiar projection screen shapes, such as a pyramid, a prism, a platonic solid, or the likes; or even a mannequin, a ripple folded hanging curtain, or an acoustically anechoic egg-carton shaped wall (typically a grid of "fingers” alternating with indentations or a grid pattern of alternating orientation wedges) or the likes.
  • a tiny projector to image-illuminate a desktop, display-case, or hand-held screen surface.
  • Typical in this new class are such items as a fold-out or pop-up screen surface for a 3 G mobile telephone or for a hand held computer or for a video-I-Pod type apparatus (e.g. hand-held MPEG enabled display article) or for the likes.
  • a fold-out or pop-up screen surface for a 3 G mobile telephone or for a hand held computer or for a video-I-Pod type apparatus (e.g. hand-held MPEG enabled display article) or for the likes.
  • a fold-out or pop-up screen surface for a 3 G mobile telephone or for a hand held computer or for a video-I-Pod type apparatus (e.g. hand-held MPEG enabled display article) or for the likes.
  • countless known origami and mechanical engineering constructions are applicable.
  • various smooth contour and accordion contoured materials are useful as screen materials.
  • Figure 1 illustrates a schematic view of the screen projection system
  • Figures 2 illustrates a schematic systems view of a mobile screen variation of the screen projection system
  • Figure 3 illustrates a schematic view of a multi-screen embodiment of the screen projection system
  • Figure 4 illustrates a schematic systems view of an image processing appurtenance used in the preferred embodiments of the screen projection system.
  • a screen projection system 100 comprising (A) a screen unit 200 having (A.i) a light dispersing surface 210 with at least one (and preferably many) surface contour inversion point(s) 220 221 222 substantially centrally located 230 thereon and (B) a projection unit 300 having (B.i) an electronic input means 310 (e.g. cable connection to data buffer) for receiving an input image, (B.ii) interfaced to the input means, an electronic processing means 320 (e.g.
  • image processing microprocessor for forming an output image of the input image by distorting the input image proportionally to respective distances 330 331 332 between an electronic output means and a preponderance of locations on the surface, and (B.iii) interfaced to the processing means, the electronic output means 340 (e.g. back-lit LCD & lens apparatus) for converting the output image into an optical projection, wherein the optical projection is pointed at the screen unit (preferably so as to cause minimal shadow regions on the screen and maximal illumination of the screen).
  • the electronic output means 340 e.g. back-lit LCD & lens apparatus
  • the screen unit is affixed to a rigid support. This in turn allows the projector to likewise be places in a stable fixed position. Accordingly, the projector focus may be preset, and the necessary relative screen portion to projector distances parameters may likewise be preset.
  • the screen unit 200 includes means for moving 240 the screen (e.g. electro-mechanical motor, solenoid, gears, pulleys, etc.) along a predetermined path and the path is selected form the list: a track, a cable, a rotator, a vibrator, a robotic vehicle, and a combination of the aforesaid, and
  • the processing means 320 includes means for updating 350 the respective distances (e.g. sensor and data interface), and
  • the output means 340 includes means for keeping the optical projection pointed 360 at the screen unit (e.g. solenoids and/or means for paralleling the motion of the screen unit).
  • the light dispersing surface includes at least one predetermined discontinuity selected from the list: a cut-out hole, an optical opaque area, an optical reflective element, a mirror, an optical absorbing black area, a lens, a lenticular surface, a prism, a structural support, and a combination of any of the aforesaid.
  • the at least one surface contour inversion point substantially centrally located thereon characterizes the screen as having a shape selected from the list: a cone, a prism, a pyramid, a crystallographic "cut shape", a sinusoidal curtain, an X-and-Y sinusoidal "egg carton shape”, a saw-tooth curtain, an X-and-Y saw-tooth "egg carton shape", a propeller with at least two symmetrically distributed blades, an automotive vehicle, a mask, a mannequin, a statue, at least two interfacing sides of a building, at least two interfacing sides of a room, at least two sections of any of the aforesaid and the at least two sections are positioned such that any imaginary contiguous attachment of the at least two sections would result in the at least one contour inversion point, and any combination of the aforesaid.
  • the screen includes a plurality of surfaces having distinct angular edge(s) at their respective interface. According to the preferred embodiment, at least two of these surfaces are substantially flat. These distinct angular edges need not be knife like, since there are certain screen surfaces that may be continuously molded to cover the surfaces and to bend over the edges.
  • FIG 3 illustrates a schematic view of a multi-screen embodiment of the screen projection system - wherein the screen unit 200 in this example is a plurality of cloth screen material tubes 251 252 253 that are independently free standing (either by being hung from a ceiling or by being hung from respective internal skeleton structure). Since these tubes receive their projection from a single distant projector (not shown), only the projector facing side of each tube receives an image portion. For convenience of an observer, regions of the projection "light cone” that would fall between tubes have been "blacked out” by the processing unit.
  • each projector with screen (portion) may constitute a separate embodiment of the instant invention.
  • the actual specifications for optics, focal length, image quality (data/pixel density) etc will vary according to the application and the scale of the projection- with-screen configuration - all of which are well known parameters to the ordinary man of the art.
  • the projection unit is arranged so that the optical projection that is pointed at the screen unit is focused on an imaginary plane that divides the screen surface so that half of the screen surface is in front of the plane and half of the screen surface is behind the plane.
  • the projection unit is arranged so that the optical projection that is pointed at the screen unit is focused on an imaginary plane that divides the screen surface whereby at least three locations of the screen that are most distant from the projection unit are substantially equally distant from the plane to at least three locations of the screen that are closest to the projection unit.
  • the electronic processing means includes a digital model of the screen surface.
  • the electronic processing means includes means for monitoring motion of the screen, and therewith the processing means includes means for updating the respective distances.
  • the means for forming an output image is arranged for a projections orientation selected from the list: front projection, rear projection, lateral projection, and a plurality of the aforesaid wherein the optical projection of the output means includes pointing at respective portions of the screen unit.
  • the output image is digitally transferred, but there are special embodiments (especially for one or a small number of still images) where the output image media is a transparency image film - such as that used in slide projectors.
  • the present invention also relates to embodiments of some particular appurtenances, such as a screen (mutatis mutandis) for use in a screen projection system, the screen comprising a light dispersing surface with at least one surface contour inversion point substantially centrally located thereon.
  • the surface includes means for affixing to a rigid support.
  • the light dispersing surface includes at least one predetermined discontinuity selected from the list: a cut-out hole, an optical opaque area, an optical reflective element, a mirror, an optical absorbing black area, a lens, a lenticular surface, a prism, a structural support, and a combination of any of the aforesaid.
  • the at least one surface contour inversion point substantially centrally located thereon characterizes the screen as having a shape selected from the list: a cone, a prism, a pyramid, a crystallographic "cut shape", a sinusoidal curtain, an X-and-Y sinusoidal "egg carton shape”, a saw-tooth curtain, an X-and-Y saw-tooth "egg carton shape", a propeller with at least two symmetrically distributed blades, an automotive vehicle, a mask, a mannequin, a statue, at least two interfacing sides of a building, at least two interfacing sides of a room, at least two sections of any of the aforesaid and the at least two sections are positioned such that any imaginary contiguous attachment of the at least two sections would result in the at least one contour inversion point, and any combination of the aforesaid.
  • Figure 4 illustrates a schematic systems view of an image-processing appurtenance used in the preferred embodiments of the screen projection system.
  • the present invention furthermore relates to embodiments of additional particular appurtenances, such as an image processing unit 400 (mutatis mutandis) comprising (A) an electronic input means 410 for receiving a digital input image, (B) interfaced to the input means, an electronic processing means 420 for forming a digital output image of the input image by distorting the input image proportionally to respective distances between an optical projection means and a preponderance of locations on a light dispersing surface, the surface substantially as hereinbefore described and illustrated, and (C) interfaced to the processing means, an electronic output means 430 capable of interface to a means for converting the digital image to an optical image.
  • an image processing unit 400 (mutatis mutandis) comprising (A) an electronic input means 410 for receiving a digital input image, (B) interfaced to the input means, an electronic processing means 420 for forming a digital
  • the preferred variations of this embodiment are preset distortions configurations in the processing means - so that (for example) the processing appurtenance may be placed in line between on the one side a VCR, TV receiver, or the likes and on the other side a video projector; all of which is designated for a predetermined screen unit and preferably for a substantially predetermined orientation between the projector and the screen unit.
  • substantially all of the aforementioned embodiments relate to an "optical" projection unit projecting onto an essentially non- proximate screen "surface” unit.
  • at least one virtual projection unit is physically incorporated with the screen unit - which remains "a light dispersing surface with at least one surface contour inversion point substantially centrally located thereon.” More specifically, to accomplish the virtual projection substitution, using a plurality of rigid display modules - based on a technology selected from the list: LED, LCD, CRT, Plasma or like surface as the screen unit (having the requisite at least one surface contour inversion point), one may configure the respective projection unit to be in virtual integration with the corresponding screen unit.
  • the virtual projection unit is identical to the ordinary embodiment projection unit, in that both respectively include an electronic input means for receiving an input image, and interfaced to the input means, an electronic processing means for forming an output image of the input image by distorting the input image proportionally to respective distances between an electronic output means and a preponderance of locations on the surface.
  • the electronic output means for converting the output image into an optical projection, wherein the optical projection is pointed at the screen unit "by being physically integrated therein” such that each portion of light dispersing surface of the screen unit includes integrally therein a micro projection element - selected from the list: LED, LCD, CRT, Plasma, or the likes.
  • the LED may be of the current-use plug in matrix variety or of the more recently innovated printed-on-substrate variety or flexible OLED.
  • the LCD may be of the glass-sandwich variety or of the more recently innovated flexible membrane variety.
  • the Plasma may be of the standard rigid display module type or of the more recently innovated microspheres-in-addressable-flexible-substrate form, dynamic optical fiber fabric displays.
  • electrophoretic monochrome displays are a potential equivalent substitute.
  • the Cordis-FP6- NANOPAGE project is developing a flexible large area display made by assembly of microCRTs into a polymer canvas.
  • the microCRTs are millimetre size cold-emission cathode ray tubes, used as elementary color dots, 3 microCRTs, red, green and blue, making a complete pixel; wherein the microCRTs use nanometer scale Carbon Nanotubes (CNT) as cold electron sources.
  • CNT Carbon Nanotubes
  • the virtual projection feature allows performance of substantially the same function in substantially the same way - to yield substantially the same result.
  • the function is the dispersion of light from the screen surface, the way this is accomplished is by having a light source and means for modifying the optical texture of that light source with respect to predetermined areas of the screen surface - all of which obey the novel criteria of "distorting the input image proportionally to respective distances" between a virtual electronic output means "and a preponderance of locations on the surface” wherein the virtual electronic means whereby the distortion is appropriate to compensate for a real front projection, rear projection, lateral projection, or the likes.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)

Abstract

La présente invention concerne un système de projection sur écran comprenant (I) une unité écran présentant une surface de dispersion de lumière qui comporte au moins un point d'inversion de contour de surface situé au centre de celle-ci; et (II) une unité de projection présentant un système d'entrée électronique destiné à recevoir une image d'entrée, un système de traitement électronique destiné à former une image de sortie de l'image d'entrée en réalisant une distorsion de l'image d'entrée proportionnellement aux distances respectives entre un système de sortie électronique et une prépondérances des emplacements sur la surface; et le système de sortie électronique destiné à convertir l'image de sortie en une projection optique qui est dirigée sur l'unité écran.
PCT/IL2006/001253 2005-10-31 2006-10-31 Systeme de projection sur ecran WO2007052261A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL17167605 2005-10-31
IL171676 2005-10-31

Publications (2)

Publication Number Publication Date
WO2007052261A2 true WO2007052261A2 (fr) 2007-05-10
WO2007052261A3 WO2007052261A3 (fr) 2008-01-10

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PCT/IL2006/001253 WO2007052261A2 (fr) 2005-10-31 2006-10-31 Systeme de projection sur ecran

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WO (1) WO2007052261A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107295283A (zh) * 2016-03-30 2017-10-24 芋头科技（杭州）有限公司 一种机器人的显示系统
US10968074B2 (en) 2015-07-03 2021-04-06 Otis Elevator Company Elevator car wall imaging system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5114224A (en) * 1990-02-19 1992-05-19 Densu Prox., Inc. Automatic follow-up projecting system
US6554431B1 (en) * 1999-06-10 2003-04-29 Sony Corporation Method and apparatus for image projection, and apparatus controlling image projection
US20030098957A1 (en) * 2001-11-28 2003-05-29 Haldiman Robert C. System, method and apparatus for ambient video projection
US20030234909A1 (en) * 2002-06-19 2003-12-25 Collender Robert Bruce Stereoscopic moving pictures with two eye image duplication & positioning method and apparatus
US20050128437A1 (en) * 2003-12-12 2005-06-16 International Business Machines Corporation System and method for positioning projectors in space to steer projections and afford interaction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5114224A (en) * 1990-02-19 1992-05-19 Densu Prox., Inc. Automatic follow-up projecting system
US6554431B1 (en) * 1999-06-10 2003-04-29 Sony Corporation Method and apparatus for image projection, and apparatus controlling image projection
US20030098957A1 (en) * 2001-11-28 2003-05-29 Haldiman Robert C. System, method and apparatus for ambient video projection
US20030234909A1 (en) * 2002-06-19 2003-12-25 Collender Robert Bruce Stereoscopic moving pictures with two eye image duplication & positioning method and apparatus
US20050128437A1 (en) * 2003-12-12 2005-06-16 International Business Machines Corporation System and method for positioning projectors in space to steer projections and afford interaction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10968074B2 (en) 2015-07-03 2021-04-06 Otis Elevator Company Elevator car wall imaging system and method
CN107295283A (zh) * 2016-03-30 2017-10-24 芋头科技（杭州）有限公司 一种机器人的显示系统
CN107295283B (zh) * 2016-03-30 2024-03-08 芋头科技（杭州）有限公司 一种机器人的显示系统

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