Projection system

 

The projection system includes a visual display, at least one projector mounted from the side end face of the optic screen, diffusers, located on the visual display performed to capture the projection rays and installed so as to reflect or reject the projection rays in the sector of observation images. The input and output window diffusers have an area that is many times smaller area of the visual screen, it also provides the combination of the cross-section of the projection rays with input boxes, diffusers, which are made with the ability to capture the projection of the rays directed from the end of the visual screen along its surface. The technical result - the creation of a design of a projection system with a minimum amount of projection space. 7 C.p. f-crystals, 6 ill.

The invention relates to projection display systems of visual information by the optical projection of the visual screen.

The proposed projection system designed for public and professional use in film, television, computer display is haunted projection systems contain a projector and projection screen. Frontprojection system used for the projection of images on a reflective (frontprojection) screen or a white wall, and rearprojection system for projection onto a translucent (recreational) screen.

Advantages frontprojection systems: projection screen structurally simple, compact, lightweight and thin.

Disadvantages frontprojection systems: bright external stray light screen leads to visual discomfort observation images (significantly reduced the main optical projection parameters: sharpness, contrast, color depth and range of halftone gradation). This limits the use of projection systems in lighted areas and open spaces. Requires a five-fold increase in the light flux with the increase of the power consumption of the backlight. To avoid shading projection spectators projectors in front of the screen set with the tilt axis of the projection angle up to 40° to the normal screen, optical and electronic (with loss of image resolution) correcting trapezoidal distortion of the projected image.

The prototype of the invention, close to the achieved result is recreationa system with lens is - the n: JV "Panas", 1993, pages 70-83, Fig.22, 23, the terms and definitions pages 147-155). On the screen side of the projection is located Fresnel lens, and on the audience side adjacent vertically spaced lens elements separated by black vertical stripes, which provides image of high contrast in a bright room. The Fresnel lens focuses the light flux in a very narrow angle scattering. Lenticular lenses direct concentrated projection luminous flux in the gap between black vertical stripes, dissipating it in the direction of the audience in a wide viewing angle. Dark screen insensitive to extraneous illumination, and a high concentration of light in narrow gaps perceived as a high brightness image.

Advantages rearprojection systems: when the external parasitic illumination of the screen of the prototype provides a visually comfortable observation of the projected image and the exception shading projection of the audience (the projector is located behind the screen).

The disadvantages of the prototype: lens-raster screens significantly reduce the brightness and color accuracy from the center to the edge of the screen when viewed from angles close to the edge section of the outer objects. The design complexity, the excessive increase in the weight and size counterparts rearprojection systems connected with the necessity of placing the projection system in sweetamanda room or building with flat mirrors and hard hanging projector (this requires a large projection distance between the projector and the screen is comparable to the length of the diagonal of the image). When external bright parasitic illumination of the visual screen contrast of the observed image significantly decreases, the brightness is reduced at the edges of the field display image, the color accuracy is lost.

These problems of projection systems with reflective screens associated with a projection visible to the viewer the maximum area of the screen, and problems with the translucent screens associated with the need for projection at a large angle to the plane of the screen in a dark svetozarovna and a relatively large space behind the screen.

Disclosure of the invention.

Task to be solved by the claimed invention is a substantial improvement of structures of projection systems to ensure the operating projection, reduction of weight and dimensions rearprojection systems, ensuring maximum visual the above problems and provide new technical and operational parameters of projection systems.

A single technical result achieved in the implementation of the claimed invention is to provide a construction of a projection system with a minimum amount of projection space by projection at an acute angle to the plane of the screen or in the end face of the light guide screen when the maximum luminous efficiency. For frontprojection systems this will ensure that the projection without shading images. For rearprojection systems this eliminates svetoslava off-screen space that simplifies the design, reduces the weight, size and cost of the system ensures the increase of the critical parameters and will provide new effective parameters of the projection system.

Additional technical result according to p. 2 the formula of the invention is the simultaneous projection of different projectors of different images for simultaneous observations on the General screen of different full-screen images of different audiences, located in different sectors of observation.

Additional technical result according to PP 3 and 4 of the claims is the maximum or complete elimination of the projection space using the projection rays in the light guide screen black is zobrazenie only local diffusers fiber. This will prevent shading projection, will generate display images simultaneously from two sides and will allow projection system with screens in the form of transparent plates or plates with adjustable transparency.

Additional technical result according to p. 4 formulas of the invention is the formation of a display image when the projection rays corresponding to particular elements (pixels) of the image, with different entry angles of incidence on the reflective surface on the inside of the screen to display these rays screen diffusers in the respective coordinates of forming a display image.

Additional technical result according to p. 5 formula is the expansion of the visible audience display area ar, or matte black finish, or transparent, or with adjustable opacity. This reduces the area of the visible elements of a display image, which significantly increases as the required optical properties of the screen, and the visual comfort of the observation screen. In bright ambient illumination of the screen optimally increases the sharpness, contrast, color accuracy, extended range politono AspectJ new parameters: simultaneous observation of the display image, objects or the background behind the transparent or tinted projection screen, control the transparency of the screen.

Additional technical result according to p. 6 formula is providing shadowless projection with long distances or shadowless short-focus projection fixed on the edge of the screen the projector tightly focused lens.

Additional technical result according to p. 7 formula is constructive simplification projectors without projection lenses by forming a collimated backlight itself or the Micromirror matrix with a given spatial distribution of rays on the screen. This will ensure that the projection is geometrically correct and clear images on flat and curved surfaces of the screens.

Another technical effect of the invention according to p. 8 formula is providing a comfortable observation without stereo-images with the free displacement of the audience in the observation sector of stereo images. If this is possible on a shared screen simultaneous observation of different audiences of different images from different angles of vision of the stereoscopic images.

Okusama contains one or more projectors for the formation and/or the projection of the transformed and/or trapezoidal frames of images and visual screen. On the screen formed diffusers projection rays.

A distinctive feature is that the diffusers preprocessing or a rear-projection screen is made of discrete spherical microthermal, and/or microlenses, and/or microeconom, and/or microprism protruding above the surface of the screen or formed in the volume screen. The diffusers are located on the screen discretely or in raster order and focused on frontprojection or recreactional the screen so that the maximum luminous efficiency of capture (input Windows of these diffusers) all projection rays directed at an acute angle to the plane of the screen or in the light guide screen capture projection rays aimed at the transparent end plate of the light guide screen with the following deviation and dispersion of the projection rays in the sector surveillance display images with uniform across the field brightness.

According to p. 2 claims projection system contains two or more projectors for simultaneous projection of images on a common screen. The projectors are located at different angles projected on the screen, for example from one side of the screen at different disa simultaneous projection on the General screen of different full-screen images at different angles. The diffusers of the screen is made of microthermal and/or microlenses and/or microeconom. The diffusers are made with the optical scheme of the electoral capture of each projection beam of a specific projector and dispersion of the beam in the corresponding sector of observation one full-screen image. It provides simultaneous observation of different full-screen images (formed by different projectors) observed different viewers located in different sectors of observation.

In another embodiment, the projection system according to p. 3 claims projection system differs in that the visual screen in the form of fiber in the form of a plane-parallel plate, or layered, or multi-band optical fiber. The core of the fiber has a constant refractive index and is made with transparent end input boxes for entering into the light guide parallel projection rays. On the surface of the optical fiber local area of the screen are raster or bitmap diffusers. The diffusers are formed in the volume or on the surface of the light guide and the optical scheme to capture the projection rays in the light guide and the next I. The projector or projectors made with an optical system forming a narrow (collimated) parallel projection rays. Projectors are focused on the screen to ensure accurate input of these rays through the end face or end faces of the fiber at certain coordinates of incidence of rays on the reflective inner surface of the fiber with the calculation of the distribution of certain projection rays along the optical fiber to a certain diffusers due to multiple internal reflections from surfaces (between diffusers) of the light guide.

According to p. 4 claims projection system differs in that in a fiber optic screen, the core of the optical fiber made with a wedge-shaped narrowed by the thickness of the light guide in the direction of propagation of rays in waveguide from the input end of the fiber to the opposite end. The core has a constant refractive index and coated or optical input window svetorasseivateley with a constant or graded refractive index lower than the core refractive index. For projection systems with any variant of the light guide screen the projector is made with an optical system forming the projection rays form the beams in an end face of the light guide. It propagates along the optical fiber of each specific beam prior to its capture and output certain svetorasseivateley from a fiber in the corresponding coordinate of the OSD image with subsequent dispersion of all projection rays diffusers in the observation sector of the screen.

According to p. 5 claims projection system, made by PP.1-4, characterized in that the visible spectators output window diffusers screen completed with a minimum size, many times less visible to the audience area of the screen around these Windows. Screen space around the output window diffusers are made with antiglare or matte black finish or matte black removable grid. In another embodiment, the area of the screen around the output window of the diffusers are made of optically transparent or closed mesh optical filter or made with photochromic coating to control the degree of transparency of the screen UV illumination.

According to p. 6 claims projection system, made by PP 1, 2, and p. 5, characterized in that the projector or multiple projectors are made with projection lenses for proekti the minimum distance from the edge of the screen or rigidly fixed to the end part of the screen. For both variants with a specific end side of the screen (or several mirrors on each short end sides of the screen) fixed flat mirror area corresponding to the size displayed on the screen, this mirror projection. Mirror tilted relative to the axis of the reflected projection and the plane of the screen (in accordance with the position of the projector relative to the screen) for the deviation of the projection rays of the mirror at an acute angle to the surface of the screen. All projectors provide a projection of the transformed trapezoidal frame with increasing size of the projection within the square mirrors and screen.

According to p. 7 claims projection system with screens made any PP 1-6, characterized in that the slide projector or overhead projector with projection or Micromirror matrix made with the optical scheme collimated illumination (forming a projection image of the slide or the projection matrices. The illumination is made from the condenser lens or mirror reflector to provide a fan of the spatial distribution of the projection rays, so that each projection beam fell on the appropriate svetorasseivateley in the corresponding coordinate of the screen the screen image.

According to p. 8 claims projection system made according to PP 1-7, characterized in that the projectors are made with the optical scheme for the formation of stereoprojection. The projection screen is made with diffusers in the form of microlensing and/or Micromirror of stereomaster to capture the projection rays and spatial selection of the left and right images of a stereo pair in the zone of vision of the left and right images of a stereo pair, respectively, the left and right eyes of the viewers. For a comfortable glasses surveillance images from any angle in the observation sector of stereo images or lateral displacement of the audience, the system is designed with semi-automatic offset manual adjustment of the coupling system stereoprojection (mates zones visions of stereo images with eyes corresponding to the viewer). In another embodiment for automatic mating system stereoprojection (zones of stereo vision with the eyes of a particular viewer, the system is designed with autocorrection and related autocorrection sensor tracking coordinates of the eyes of the viewer or viewers. Screen and/or raster screen system or projectors contain drive, svyazannosti correction system) pair of zones of vision of the left and right frame images on the screen with the corresponding eyes of the spectators, for example, by turning stereohedron around its vertical axis, or offset lenticular, or offset along the screen storeobject of stereoprojection. This also allows the projection stereo system for simultaneous observation of the General stereoanlage different full-screen images of different audiences from different angles of observation and with the possibility of free displacement of the audience.

A brief description of the drawings.

The figure 1 shows a side view of a projection system for projection and observation of the images on both sides of the screen and two projectors in the upper end of the screen and reflecting end mirrors (at the bottom of the screen), the figure 2 shows the left front side of the screen.

The figure 3 shows a side view recreactional system with fiber optic screen (with the lumen of the fiber through the end of the screen), and figure 4 shows the left front side of this screen.

In figure 5 (a) shows the optical scheme frontprojection screen, as in figure 5(b) optical scheme rearprojection screen variant forms of diffusers (with views in cross section of the screen).

The figure 6 shows a view in plan of the optical circuit in popscene zones stereoscopic vision with the eyes of the viewer.

Embodiments of the invention.

In the first embodiment, the projection system in figures 1 and 2 visual screen 7 is made in the form of a flat thin plate, on the top of the screen fixed (continuous focus) projectors. At the bottom of this screen installed flat mirrors 2A and 2B to reflect the projection rays of these projectors on both sides of the screen 1. On one front side of the screen and the other face side b of the display area of the observation screen images formed diffusers 3A and 3b. The diffusers are made constructively and oriented for engagement projection rays1and2(reflected by the mirrors on the screen), the subsequent deflection and scattering of these rays diffusers within angle1and angle2relevant sectors of the observation screen images with sides a and b of the screen. The screen surface 1A and 1B around the diffusers are made with protivosokovm or black matte finish, or transparent, or to control the transparency of the external UV illumination coated photochromic film. P is er="0">1at an acute angle to the surface 1A of the screen, and rays2to the surface 1B of this screen.

In another embodiment, the projection system on the figures 3 and 4 visual screen is made of two parallel flat transparent optical fibers 1B and 1D with clear beveled input ends of the input projection rays3and4. At the input end of the optical fiber 1B is the projector 2B, and before the end of the fiber 1G is the projector p On the front sides of the screen and g surfaces of the optical fibers 1B and 1D in space surveillance screen images formed diffusers 3V and g These diffusers are designed to capture rays3and4projected respectively projectors 2B and 2G, the output of these beams from the optical fibers, deviation and dispersion of these beams respectively in the corners3and4sectors of observation of the display images from the parties, and Fiber optic cables are designed for distribution of the projected rays to a certain diffusers by projectiona visual screen 1 each svetorasseivateley 4 is performed with the positive microlens 5 and inclined flat microcircula 6. With the audience on the surface of the diffusers around the input and output Windows caused antiglare matte black or photochromic coating 7. The microlens 5 is designed to capture and dispersion (focus) beam angle5sector monitoring screen. Microthermal 6 is used for the deviation of the focused beam and the output beam through transparent with a small area of the output window svetorasseivateley.

In another embodiment, in the figure 5 (b) each svetorasseivateley made with microprism 6(b) to deflect sunlight in the mirror focon 6(d), the scattering rays in the sector of observation images. In other embodiments, the screen for deflection and simultaneous dispersion of light in the corner6sector surveillance image installed only spherical or parabolic micromirrors 6A.

In figure 6 the stereoscopic projection system includes a visual screen 1 with diffusers 4L for forming picture elements of the left frames and diffusers 4n - elements of the right image frames. With the audience on the screen is mounted movably on the arrowreflected from the face of the viewer) of the spatial location of the viewer's eyes relative to the zones of stereo vision. Or is suitable for optical coupling zone of vision raysl left image with the left eye 12L spectator, and the zone of vision raysn right images respectively with the right eye 12n of the audience. When comfortable and lateral displacement of the viewer in front of the screen this glasses provides constant surveillance of the stereo.

The stated projection system works as follows.

In the first embodiment, the projection system in the figure 1 and 2 two projectors 2A and 2B, is made with trapezoidal frames or transform in trapezoidal frames two of the projected image. Optical or electronic transformation of the projected image extends horizontally to the width of the screen, and vertically narrow on the optimal width of the image, multiply the smaller size of the screen height. Projection rays1and2napravlenny 1A and 1B of the screen 1 at a certain small angle to the screen surface. Projection rays narrowed in cross section within the area of the input window svetorasseivateley given accurate and complete capture of each individual of a particular beam one particular svetorasseivateley 3A or 3b. Projectors and diffusers form full screen the same or different images seen by different audiences simultaneously from both sides of the screen without optical interference. The black coating of the visible surface of the screen around the output window diffusers can absorb parasitic light more than 98%.

In figures 3 and 4 variant projection system with a visual display between two plane-parallel optical fibers is as follows. The bottom-side end of the screen 1B and 1D projectors 2B and 2G form the light fluxes projected images in the form of a narrowly divergent (collimated) beams3and therefore4. The projector 2B from below through the beveled transparent end face of the optical fiber 1B projecting rays3. These rays are repeatedly reflected inside the light guide in the form of rays3diverging to certain points �D/chr/946.gif" border="0">1sector monitoring screen from the side of the screen 1B. Similarly, the projector 2 is projected and formed a screen image for observation from the opposite side of the city screen g

In figure 5 (a) presents frontprojection screen 1 with diffusers 4 in the form of microlenses 5 paired with flat sloping microcircular 6. From viewers around the output window diffusers applied matte black coating 7, which is absorbed (more than 98%) stray light screen. The diffusers provide full direct capture of projection rays(directed at an acute small angle to the plane of the screen), then focus the rays of the microlenses 5 and then reject these rays by microcircular 6 to dispel these beams in the corner5sector monitoring screen.

In figure 5(b) presents rearprojection screen 1 with different diffusers and coatings of the screen. At the top of the screen svetorasseivateley made in the form of deflecting projection optical rays microprisma 6V, coupled with the mirror-spherical or mirrored parabolic focon (Zazerkalye spherical or parabolic microcircular 6A for simultaneous deflection and focusing of the projection rays in the minimum area of the output window of the diffusers. The diffusers (the average height of the screen) micromirrors of diffusers are associated with holes d (in the form of a hollow focon) and provide forced ventilatio from dust output Windows to automatically clear the screen by internal air pressure jet fan, which blows the screen from the back side.

In svetorasseivateley 6A (in the lower height of the screen) micromirrors 6A paired with transparent output between Windows blacked out area 7a of the screen. Screens (square screen for output Windows) can be transparent or coated antiglare matte black paint 7a or removable black mesh 7a, or to have photochromic coating 7a (to control the transparency of the screen using ultrafioletoviy backlight). Angle6the scattering angle projection ray microcircular in the sector surveillance screen images.

In stereoprojection system figure 6 stereoprojection form autostereogram in the form of alternating horizontal vertical bars left and right images of a stereo pair. Stereomaster 8 left image is projected in the zone of vision of the left eye and the right image is in the zone of vision of the right chap whom I determine sensor location of the eyes in space in contrast eyes and face. The sensor 11 generates a control signal issued on or 10. Drive 9 or automatically shifts stereomaster to the optimal alignment zones of vision of the left image with the left eye 12L spectator, and the zone of vision of the right image (raysnrespectively with the right eye 12n.

The optimal way of performing a projection system for use in dusty conditions or precipitation is the fulfillment of the design of a projection system with a shut from light, dust and water projection space behind the screen, which houses the projector and the back side rearprojection screen. The projector can be placed at any distance from the screen, and transformed projection guide on the horizontal or vertical input window of the light guide screen or face the mirror frontprojection or rearprojection screens (protected against dust and rain).

Other optimal projection system is design for projection on the surface or inside of the glasses. For this glasses with side projection or observation images pinned film with diffusers. While Mick the outer objects, observed through square glasses around the diffusers. Ultraviolet illumination photochromic layer within the thickness of the glass or on the outside of these glasses is governed by the transparency of the glasses for a better observation of the projected image on a dark background. For high luminous efficiency projections in glasses diffusers are made with a minimum angle of dispersion of the projection rays only in the area of the pupil of the eye, which is hundreds of times will reduce the consumption of microprojection. It is also a wonderful stereoscopy in ultra-wide angle field of view up to 140°, with a wide range of gradations of tones, high brightness, accurate color reproduction and high contrast and high resolution. Such parameters it is impossible to provide on stereocrash known stereoprojection systems.

The proposed projection monoscopically and stereoscopic system will provide optimum optical and structural parameters that are impossible to get in the best world analogues. Simultaneous observations of different full-screen mono stereo images of different audiences from different angles at any parasitic illumination of the screen, comfortable glasses of nabuna stereoprojection on the glasses and other effective parameters of the proposed projection systems confirm the high inventive step.

Industrial applicability

All proposed projection system can serially be manufactured by known manufacturing technologies projectors, stereoprojection, projection optics and visual screens with reflectors or lens rasters. For the auto stereoprojection system can be used known system-correction of the displacement of objects with sensors tracking contrasting elements of interest to determine the spatial orientation of these objects and automatic adaptation of the system to comfortable conditions of observation images. Therefore, the industrial feasibility of the invention is obvious.

Claims

1. Projection system that contains a visual screen at least one projector mounted from the side end face of the optic screen, diffusers, located on the visual display performed to capture the projection rays and installed so as to reflect or reject the projection rays in the sector of the observation image, wherein the input and output window diffusers have an area that is many times smaller area of the visual screen is provided by the combination of paperarello to capture the projection rays, directed from the end of the visual screen along its surface.

2. Projection system on p. 1 with two or more projectors that are located in different angles simultaneous projection of visual images on a screen, characterized in that for simultaneous monitoring of different full-screen images of different audiences, located in different sectors of observation, projectors focused on the screen for simultaneous projection of different full-screen images in different sectors of the separate observation of these projections, and the diffusers of the screen is made of microthermal, and/or microlenses, and/or microeconom with the optical scheme of the electoral simultaneous capture of the projection beam of each specific projector dispersion of the beam in the corresponding sector of observation one full-screen image and dispersion of other projection beams in other sectors of observation.

3. Projection system on p. 1, wherein the visual screen in the form of the fiber to form a plane-parallel plate or a multi-layered or multi-band optical fiber, the optical fibers have a core with a constant refractive index and a transparent whaddyaknow total internal reflection, on the surface of the optical fiber local area of the screen are the diffusers for selective capture, output from the optical fiber and the dispersion of the individual projection rays in certain coordinates forming a display image, and the projector or projectors made with an optical system forming a projection beam of thin parallel rays projectors aimed at the screen for directions of these beams into the ends of fiber in certain coordinates fall of each beam within the surface of the light guide with regard to the passage of each particular beam to a corresponding svetorasseivateley.

4. Projection system according to p. 3, wherein the core fiber of the screen is made with a wedge of the intended thickness in the direction of propagation of rays in waveguide from the input end of the fiber, the core has a constant refractive index and coated or optical input window svetorasseivateley with a constant or graded refractive index lower than the refractive index of the core, in any embodiment, the light guide screen the projector is made with an optical system forming the projection of rays of different elements projected is hraneniya in the fiber of each particular beam to capture the beam in a certain svetorasseivateley with subsequent output beam from the fiber in the corresponding coordinate of the OSD image with the subsequent scattering of the projection rays diffusers in the observation sector of the screen.

5. Projection system according to any one of paragraphs.1-4, characterized in that the visible spectators output window diffusers screen completed with a minimum size of less visible to the audience area of the screen around them, and to absorb stray light and glare screen space around the output window diffusers are made with antiglare or matte black finish, or matte black removable grid, or optically transparent, or closed mesh optical filter, or to adjust the degree of transparency of the screen UV exposure is made with photochromic coating.

6. Projection system according to any one of paragraphs.1, 2 and 5, characterized in that the projector or multiple projectors are made with projection lenses and installed at a far distance from the screen and/or projector with short throw lens is set at the minimum distance from the screen or rigidly fixed to the end of the screen, all projectors provide the transformed projection, one or more end sides of the screen fixed on one flat mirror with a reflective area of a size corresponding to the size displayed on the screen, this mirror projection, each sarcastly angle to the surface of the screen.

7. Projection system according to any one of paragraphs.1-6, characterized in that the slide projector or overhead projector with projection or Micromirror matrix made with an optical system collimated illumination of transparencies, projection matrices with the fan spatial distribution of these rays on the diffusers in the corresponding screen coordinates with the expansion of the apertures of the beams on the screen for crisp, with the correct geometry of the observed frame of the display image.

8. Projection system according to any one of paragraphs.1-7, characterized in that the system contains one or more stereoprojection and stereogram with diffusers and lens pattern for spatial selection of the left and right images of a stereo pair in the zone of vision of the left and right images of a stereo pair, respectively, the left and right eyes of the viewers, but for a comfortable glasses surveillance images from any angle or lateral displacement of the audience the system is designed with semi-automatic corrector with manual control or autocorrection and sensor tracking coordinate the eyes of the viewers associated with this autocorrection, screen or raster screen system or projectors contain drive, associated with which of the zones of vision of the left and right frame images with the corresponding eyes of the spectators, for example, by turning stereohedron around its vertical axis, or offset lenticular, or offset along the screen stereoprojection.



 

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