MXPA06007130A - Pixel-shifting projection lens assembly to provide optical interlacing for increased addressability - Google Patents

Abstract

A projection display system includes a projection lens assembly that has multiple projection lens elements that are configured to receive light imparted with display information by a pixelated display device. The projection lens elements project the light toward a display screen. A pixel-shifting element is included within the projection lens assembly to cyclically shift between at least two positions within the projection lens assembly to form at a display screen at least two interlaced arrays of pixels. An electro-mechanical transducer is coupled to the pixel-shifting element to impart on it the cyclic shifting between positions.

Description

ASSEMBLY OF PIXEL DEFLECTION PROJECTION LENSES TO PROVIDE OPTICAL INTERLOCKING FOR GREATER DIRECTIONALITY FIELD OF THE INVENTION The present invention relates to projection lens assemblies for projection display systems and, in particular, to a projection lens assembly that includes a pixel bypass element to provide optical pixel interlace for greater directionality . BACKGROUND OF THE INVENTION In many types of display systems, images are formed by pixelized optical modulators such as liquid crystal displays, digital micromirror devices, silicon crystal modulators, etc. Although there are many advantages of these pixelated screens, they can also bring with them the disadvantage of a fixed and relatively rough directionality. The resolution is related to the number of pixels in a pixelated display panel, and the directionality is related to the number of pixel locations in a screen image (i.e., the resolution of the display panel by the number of different positions that each pixel can occupy a screen image). Another problem is that each image element in some pixelated screens includes an image-forming area Ref .: 173891 central or aperture that transmits or reflects image information and is delimited by an opaque frame. Opaque frames can encompass significant portions of the image in relation to the optical apertures. The projection display systems, the projected images of these image elements may have discernible image artifacts that relate to the frames of the image elements. Image artifacts can include edges of coarse images and dark disruptions visible in the coherence of the image. - Attempts have been made to improve the appearance of the images by means of the physical deviation of the light of the pixelated visualization devices in order to deviate pixel images and thereby increase directionality. In one example, a pixelated front projector deflected display pixels using a pixel deflection device placed before or after a projection lens assembly. In one implementation a pixel bypass assembly included pressed silicone material between two glass plates. The assembly was placed in front of a projection lens and three solenoids operated together to tilt the glass plates one in relation to the other to perform the pixel fill sweep. In another implementation, a cantilevered glass plate was placed in front of a projection lens assembly and was moved by a pair of modulators also to perform the pixel fill sweep. Although they provide a pixel fill sweep, both implementations may suffer from disadvantages that are related to maintaining optimum image clarity. The pixel shifting assembly positioned after a projection lens operates in a diverging optical space wherein the light from the projection lens diverges as it propagates towards a display screen. The deviation of the pixel locations in such divergent optical space can introduce defects that are related to differences in the angles of light propagation that are projected towards different portions of the display screen. The pixel bypass assembly placed behind a projection lens operates in a telecentric optical space in which the inclined plate causes astigmatism and reduces lens performance. These disadvantages could be even more exaggerated if the directionality improvement methods for front projectors were used in rear projectors. A front projector is placed in front of a reflective display screen, along with the observers of any visualized image. In contrast a rear projector is placed behind a transmissible display screen, on the opposite side of the observers of the visualized images. The rear projectors typically have relatively short focal lengths relative to the size of the display screen, so that the projection lens mounts on these projectors have more steep angles of up to 45 degrees compared to the projection angles approximately 25-30 degrees for projection lens assemblies on front projectors. As a consequence, directionality improvements for front projectors are likely to be substantially less successful for rear projectors. BRIEF DESCRIPTION OF THE INVENTION Accordingly, the present invention includes a projection lens assembly for a projection display system. The projection lens assembly includes multiple projection lens elements that are configured to receive light imparted with display information by means of a pixelated display device. The projection lens elements project the light towards a display screen. A pixel bypass element is included in the projection lens assembly to cyclically deviate between at least two positions in the projection lens assembly to form, on a display screen, at least two interlaced pixel arrays.

An electromechanical transducer is coupled to the pixel shifting element to impart the cyclic shifting between positions therein. The invention also includes a projection display system incorporating a lens assembly. The projection lens assembly that includes a pixel bypass element between the lens elements can often provide resolutions that are at least twice the actual resolution of the pixelated display device. In addition, the optical space between the projection lenses is typically significantly less susceptible to introducing image artifacts that are pixel scanners placed before or after the projection lens. In addition, the pixel shifting in the projection lens assembly can allow the pixel bypass element to be formed in a smaller size, which can reduce any difficulty in manipulating a pixel bypass element at the required speeds. A description and further implementations of the present invention will be apparent from the detailed description of the preferred embodiment thereof, which is carried out with reference to the appended figures. BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a schematic side view of a projection display system employing optical pixel shuffling for greater pixel directionality in accordance with the present invention. Figure 2 is an amplified schematic representation of pixels placed on a display screen in interleaved arrangements as arrays of pixel shifting according to the present invention. Figure 3 _ is an amplified schematic representation of pixels placed on a display screen in a diagonal matrix with deviated pixels interposed between the pixels of each row. Figure 4 is an enlarged representation of pixels placed on a display screen in interdigitated rows that include deviated pixels. Figure 5 is an amplified representation of pixels at four different positions on the display screen resulting from the deflection in two transverse directions to provide two-dimensional pixel shifting. Figure 6 is a schematic side view of a projection lens assembly in accordance with the present invention having multiple lens elements and a pixel bypass element configured as a wedge. Figure 7 is a schematic timeline illustrating a timing coordination implementation of pixel shifting in relation to secondary frames of color components of a sequential field display system. Figure 8 is a schematic side view of another projection assembly in accordance with the present invention having multiple lens elements and a pixel deflection element in the form of a fold mirror providing a one-dimensional pixel deflection.

Figure 9 is a schematic side view of another projection assembly in accordance with the present invention having multiple lens elements and a pixel deflection element in the form of a fold mirror that provides two-dimensional pixel deflection. Figure 10 is a schematic side view of another projection assembly in accordance with the present invention having multiple projection optical lens elements, at least one of which is cyclically moved or biased to function as a pixel bypass element . Figure 11 is a schematic side view of a projection assembly and a pixel biasing element configured as a pair of wedges fixed at the ends. Fig. 12 is a schematic side partial view of a projection display system employing an optical interleaving of pixel shifting for greater pixel directionality.

DETAILED DESCRIPTION OF THE INVENTION Figure 1 is a schematic side view of a projection display system 10 employing an optical interleaving of pixel deflection for greater pixel directionality in accordance with the present invention. The projection system 10 includes a lighting system 12, a pixilated display device 14, and a multi-lens projection lens assembly 16 with a pixel bypass element 18. It will be appreciated that the schematic representation of Figure 1 does not shows various conventional optical elements as are known in the art of projection screens. The lighting system 12 directs illumination light to the pixilated display device 14, which imparts display information in the illumination light in any conventional manner or the like. The pixelated display device 14 may include a liquid crystal display, a digital micromirror device, or any other type of pixelated display device. The illumination light may be transmitted through the pixilated display device 14 as illustrated or may alternatively be reflected therefrom. The projection lens assembly 16 projects on a display surface 20 the display information received from the pixelized display device 14, to thereby form a screen image. The surface of the screen 20 can be mainly reflective in such a way that the screen image is reflected towards one or more spectators, as in a frontal projector or it can be mainly transmissible in such a way that the screen image is transmitted through to one or more spectators, as in a rear projection screen. Examples of suitable projection display systems with reflective display surfaces 20 are described in U.S. Patent No. 6,486,997. The pixel bypass element 18 is included in the projection lens assembly 16 and cyclically deviated between at least two positions to deflect optical paths of light as it passes through the projection lens assembly 16, thereby cyclically deviating therefrom. the paths are with the display screen 20. The image information imparted by the image elements of the pixelized screen 14 is transported along the optical paths to meet the display 20 as image pixels. The cyclic deviation of the pixel bypass element 18 results in pixels that are offset in position on the display 20.

Figure 2 is an amplified representation of reduced aperture pixels 30 (in bold lines) placed on the display screen 10 in three partial rows 31 without deflection. Each pixel 30 includes a central light aperture 32 and an opaque frame 33 as is characteristic of conventional liquid crystal display devices. The image information imparted by means of the pixelized display device 14 corresponds to light passing through or which is directed towards the openings 32. The opaque frames 33 function to provide the separation between openings 32. As the optical elements of some systems of display of projections have decreased in size,. the area of the opaque frames 33 has increased relative to the area of the light apertures 32, thereby reducing the directionality or resolving capacity of the pixels. Within this context the pixel bypass element 18 functions to cyclically divert pixels on the display 20 along at least one axis 34 that is transverse (eg, perpendicular) to the rows 31. As a result, the pixels 30 are placed in the rows 31 for a period of time, and the deflected pixels 35 (which are not in thick lines) are placed in the rows 36 for a second period of time. This forms two interlaced arrays of pixels 30 and 35. The pixels 30 in the rows 31 and the deviated pixels 35 in the rows 36 are alternately displayed on the display 20. The rows 31 and 36 are offset from each other by approximately a means of their shared passage 37, such that the deflected pixels 35 have light apertures 38 which overlap the opaque frames 33 of the pixels 30 in the rows 31. It will be understood that the pixels in this mode and in the other embodiments described herein could be further deviated or alternatively to form decentered columns. For example, the pixels could be biased in an appropriate direction to form offset columns in a manner similar to the formation of offset rows 31 and 36. The -... cyclic offset between rows 32 and 36 represents a one-dimensional offset that doubles the effective number of pixels 30 and 35 on the display screen 20 in relation to the number of pixels in the pixelized display device 14. This duplication has the benefit of providing twice the apparent number of imaging positions, which results in an improved image quality. It will be appreciated that the pixels 30 in the rows 31 are offset relative to the deviated pixels 35 in the rows 36 to the same extent that the deviated pixels 35 in the rows 36 are offset in relation to the pixels 30 in the rows 31. The terminology "pixels 30" and "deviated pixels 35" is used simply for purposes of illustration and does not indicate a functional distinction between pixels 30 and 35.

Figure 3 is an amplified representation of the pixels 40 (in thick lines) placed on the display screen 20 in the rows 41 of a diagonal matrix spaced without deviation. The separate diagonal matrix is characterized by the image elements in successive rows 41 which are off-center in a lateral direction 42, as is characteristic of some liquid crystal display devices. Within this context the pixel bypass element 18 functions to cyclically divert the pixels 40 on the display screen 20 along at least one axis 43 which is transverse (eg, perpendicular) to the rows 41. As a result, the pixels 40 are placed in the rows 41 for a period of time, and the deviated pixels 44 (which are not in thick lines) are interposed between the pixels 40 in adjacent rows 41 during a second period of time. This doubles the number of pixels 40 in each row. The pixels 40 and the deviated pixels 44 are alternately displayed on the display screen 20. Figure 4 is an amplified representation of the pixels 46 (in bold lines) placed on a display screen 20 in interdigitated rows 47. The interdigitation of the rows 47 are provided with the vertices of the adjacent pixels 46 oriented towards each other, thereby giving the pixels 46 an appearance that is sometimes referred to as a "diamond shape". Such arrangement of the pixels 46 may be employed in a large aperture pixel display 14, such as a micromirror device. Within this context the pixel bypass element 18 functions to cyclically divert the pixels 46 on the display 20 along at least one axis 48 that is transverse (eg perpendicular) to the interdigitated rows 47. As a result, the pixels 46 are placed in the rows 47 for a period of time, and the deviated pixels 49 (which are not in thick lines) are placed in the adjacent rows 47 for a second period of time. The deviated pixels 49 are offset by approximately one half of the passage of the rows 47 and provide greater pixel directionality. The pixels 40 and the deviated pixels 49 are alternately represented on the display screen 20. Figure 5 is an amplified representation of the pixels 50-56 in four different positions on the display screen 20 resulting from the deviation of two-dimensional pixels as shown in FIG. length of the two transverse axes 58 and 59. The pixels 50-56 correspond to light of a simple image element in the pixelized display device 14. It will be appreciated that the light of each pixel in the pixelized display device 14 could deviate similarly in the transverse directions 58 and 59 to form four arrays of interlaced pixels. The cyclic deviation along the axes 58 and 59 represents the two-dimensional deviation that provides on the display screen 20 four times the number of image elements in the pixelized display device 14. As in the case of the one-dimensional deviation, this deviation Two-dimensional provides the benefit of enhanced image quality. Figure 6 is a schematic side view of a projection lens assembly 60 in accordance with the present invention having multiple lens elements 62 and a pixel bypass element 64 that includes a configurable wedge of a pair of transparent optical plates 61 separated by compressible or deformable material 63 such as silicone. To provide a one-dimensional pixel deflection as illustrated in Figure 2, the wedge-shaped pixel shifting element 64 is cycled through the axis 66 to alternately form an upward tilt and a downward tilt.

The wedge-shaped pixel shifting element 64 is positioned in approximately one pupil or stop site 65 in a projection lens assembly 60. At least one of the plates 61 of the pixel shifting element 64 is physically swung through of the deformable material 63 by means of an actuator 68 to alternately provide upward tilt and downward tilt. The actuator 68 is coupled to a control circuit 70, which provides pixel deflection control signals that are coordinated with the activation of the pixel display device 14 image elements. The actuator 68 can be implemented with a piezoelectric or piezoceramic transducer configured to impart the rocking motion toward and after forward. As known in the design of electromechanical systems, the actuator 68 can alternatively be implemented with or including a voice coil, a solenoid, or any other electromagnetic effect that can achieve the desired movement. In some implementations, the pixel bypass element 64 moves to different positions in an approximation of a square wave type movement. In other implementations, pixel bypass element 64 can be moved to positions with a sinusoidal, resonant motion. Generally, the pixel bypass element 64 is shifted between positions during times when the screen image is dark (eg, blank) or inactive, such as during a retrace period. To provide two-dimensional pixel deflection as illustrated in FIG. 5, the wedge-shaped pixel shifting element 64 also swings around a second axis (e.g., generally parallel to a vertical line between the plates 61 such as illustrated in Figure 6, the second axis is not shown) by means of another actuator (not shown) which operates out of phase with the roll about axis 66 to provide a deviation of pixels in all four directions. The combined balancing around the axis 66 and the second axis effectively provides a rotational placement of the pixels. Fig. 7 is a schematic timeline illustrating a coordination timing implementation of pixel bypass 80 in relation to subframes of color components 82 in a sequential field display system. As an example, such a projection display system 10 could employ a pixilated display device 14 in the form of a digital icro mirror device of the type available from Texas Instruments, Inc. In such system 10, the lighting system 12 could include a scroll wheel. colors (or other color selection mechanism) having at least segments of red, green and blue colors, as is known in the art. Secondary frames of colored components 82 are designated R, G, and B corresponding to the components of successive sequential field colors red, green, and blue over time.

In this implementation, pixel deviations 80"between the first and second pixel positions 84 and 86 are coordinated with the sub-frames of the blue component 82B, which represents a time period of approximately 3 milliseconds. The timing diagram illustrated in Figure 7 uses the weaker luminance of the blue component and its relatively poor resolution of the blue component by human vision to reduce or minimize the visual artifacts that might arise during pixel shifts 80. Although this can result in a slight blurring of the subframes of the blue color component 82B, the blurring may be visually insignificant due to the low luminance of the poor resolution of the blue light.In some implementations, the subframes of the blue color components 82B can be considered the "darkest" of the secondary tables of the components s of colors, but other visualization implementations may include even darker secondary frames. For example, some display systems may include a black sub-frame to update the image or other display operations.

The human visual system is much less sensitive to blue wavelengths, and in many heatscreens the blue component constitutes only about 8% of the luminance. In comparison, the green component is commonly about 69% of the luminance and the red component is about 23% of the luminance at a balanced white point. As a result, the deviation during the blue color component can be almost invisible, which is advantageous during moving images of the color television and in case of any overmodulation and other complex movements of the pixel bypass actuator 68. FIG. is a schematic side view of another projection lens assembly 100 in accordance with the present invention having multiple lens elements 102 and a pixel bypass element 104 in the form of a fold mirror. To provide a one-dimensional pixel deflection as illustrated in FIG. 2, the pixel bypass mirror specular element 104 is cycled back and forth about the central rotational axis 106. The specular fold element 104 is positioned in a central region of the projection lens assembly 100 in the neighborhood of a pupil or stop site 108. The pixel bypass element 104 is physically inclined by means of an actuator 110, which can be implemented with a piezoceramic transducer, or an alternative actuator, for imparting the inclination movement at an edge of the element 104. The pixel mirroring fold spectral element 104 is supported at its edges by means of a light and rigid frame (not shown) that is supported on a hinge or pivot aligned with the rotational axis 106. The actuator 110 is coupled to the frame and is controlled by means of a control circuit. 112, which provides pixel bypass control signals that are coordinated with the activation of pixel display device 14 image elements. In a one-dimensional pixel bypass implementation, the pixel bypass element 104 can be tilted at a range of approximately 0.02 degrees between a pair of positions to provide a deviation of pixels about one-half the pitch of the pixel. This implementation could include the pixelized display device 14 with a diagonal dimension of 15.25 mm (0.6 inches) a pitch of pixels of 13.8 μm, and the display screen 20 with a diagonal dimension of 127 cm (50 inches). Said inclination can be achieved with an actuator 110 that imparts a translation of the edges of the pixel bypass element 104 of approximately 10 μm during the cyclic tilt. Such translation distances are within the range of commercially available piezoelectric devices. Figure 9 is a schematic side view of another projection lens assembly 120 in accordance with the present invention having multiple lens elements 122 and a pixel bypass element 124 in the form of a fold mirror. The mounting of projection lenses 120 is substantially the same as the projection lens assembly 100., but is adapted to provide a two-dimensional pixel offset as illustrated in FIG. 5. Consequently, the mirror-deflection fold element 124 is cyclically tilted back and forth about a pair of rotational axes 126X and 126Y . The pixel bypass element 124 is physically tilted by means of a pair of actuators 130X and 130Y, which can be implemented with piezoceramic transducers, or reciprocating actuators, configured to impart the inclination movement at the edges of the element 124. The specular element The pixel bypass fold 124 is supported on its edges by means of a light and rigid frame (not shown) that is supported on a pair of cardan hinges or pivots aligned with the rotational axes 126X and 126Y. The actuators 130X and 130Y are coupled to the frame and provide an inclination about the respective axes 126X and 126Y. A control circuit 132 provides the 13OX and 13OY actuators with pixel shifting control signals that are "coordinated with the activation of the pixels of the pixelized display device 14. Figure 10 is a schematic side view of another assembly of projection lenses 140 in accordance with the present invention having multiple projection lens elements 142, at least one of which is cyclically moved or deflected to function as a pixel bypass element 144. The projection lens assembly 140 is illustrated by receiving light from a dichroic cross combiner 145, which combines light passing from multiple pixelated display panels along separate paths of colored components.An example of such a projection display system in which the lens assembly could be used 140 is described in US Patent No. 6,067,128 to Imai. In order to provide a one-dimensional pixel offset as illustrated in FIG. 2, the pixel bypass element 144 is deflected or cyclically moved back and forth in a pair of opposite lateral directions 146. To provide a two-dimensional pixel offset as shown in FIG. illustrated in Figure 5, the pixel bypass element 144 is further deflected or cyclically moved back and forth in another pair of opposite lateral directions (not shown) that are transverse (eg, perpendicular) to the directions 146. The projection lens assembly 140 differs from the projection lens assembly 60 in that the first does not include a separate element (e.g., a pixel bypass wedge element 64) that functions only to provide pixel shifting. Instead, the pixel bypass lens elements 144 have at least one larger curved surface that cooperates with the lens elements 144 to provide the optical features of the projection lens mount 140. The choice of which lens element or elements it can be made to operate as a pixel bypass element 144 can be made depending on the optical sensitivity. A lens element with more optical power (ie, a shorter focal length) will have a greater displacement effect. Negative (eg, concave) lens elements can also be moved to effect pixel bypass. The pixel bypass element 144 is physically moved in lateral directions 146 by an actuator 148, which can be implemented with a piezoceramic transducer, or an alternative actuator, configured to impart lateral movement. The actuator 148 is coupled to a control circuit 150, which provides pixel shifting control signals that coordinate with the activation of pixel display device 14 image elements. In implementations with any one-dimensional or one-dimensional pixel deviations two-dimensional, the translational deviation of the pixel bypass element 144 by means of a distance of, for example, 20 μm along any translational axis produces a means of deflection in the projected image. Figure 11 is a schematic side view of a projection lens assembly 160 in accordance with the present invention having multiple lens elements 162 (only two are shown) and a pixel bypass element 164 configured as a pair of fixed wedges. end with end 166A and 166B. A pair of lighting systems 168A and 168B alternately illuminate a pixelized display device 170 along the offset optical axes 172A and 172B. During its illumination by means of a lighting system 168A, the pixelated display device 170 is reflected on the wedge 166A, which directs the pixels 174A (only one is shown) to an off-center location. During its illumination by the lighting system 168B, the pixelized display device 170 is reflected on the wedge 166B, which directs the pixels 174B (only one is shown) to a second offset site that is different from the first site. The lighting systems 168A and 168B can be alternately activated or triggered to provide alternating illumination. Figure 12 is a schematic side view of a projection display system 180 employing pixel bypass optical interleaving for greater pixel directionality. The projection system 180 includes a lighting system (not shown), a pixelated display device 182, a convergent Fresnel lens 184, a fold mirror 186 that directs light to a projection lens assembly 188. To provide a deviation of One-dimensional pixels as illustrated in Figure 2, a fold mirror 186 is operated as a pixel bypass element and is cyclically shifted or translated back and forth in a pair of opposite directions 190 that are generally perpendicular to the plane of the mirror 186. The specular folding element 186 physically moves in opposite directions 190 by means of an actuator 192, which can be implemented with a piezoceramic transducer, or an alternative actuator. The translational deflection of the mirror 186 in the directions 190 which are perpendicular to the plane of the mirror 186 cause a displacement of the optical center of the projection lens assembly 188, and thereby the desired deviation of half a pixel. The actuator 192 is coupled to a control circuit 194, which provides pixel bypass control signals that are coordinated with the activation of the pixels of the pixelized display device 182. In an alternative implementation, the Fresnel lens 184 can Also deviate from the mirror 186. In view of the many possible embodiments to which the invention may be applied, it should be recognized that the detailed embodiments are illustrative only and should not be considered as limiting the scope of the invention. Instead, all the modalities that may be within the scope and spirit of the following claims and the equivalents thereof are claimed as invention. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates.

Claims (17)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property: 1. A projection display system, characterized by comprises: a pixelated display device; a lighting system that directs illumination light to the pixelated display device to visualize information that is to be imparted to the light; and a projection lens assembly that receives light with display information imparted from the pixelated display device to project light toward a display screen, the projection lens assembly includes a pixel bypass element in the vicinity of a stop position wherein the pixel bypass element deviates cyclically between at least two positions in the projection lens assembly to form on the display screen. at least two interlaced pixel arrays, the pixel bypass element including a fold mirror positioned in the projection lens assembly and in which the cyclic deflection of the pixel bypass element includes a cyclic inclination of the fold mirror.
2. 2. The projection display system according to claim 1, characterized in that the pixel shifting element is cyclically shifted between two positions that provide a vertical offset between two interlaced arrays of pixels.
3. 3. The projection display system according to claim 1, characterized in that the pixel shifting element cyclically deviates between four positions to form four interlaced pixel arrays on the display screen. .
4. 4. The projection display system according to claim 1 characterized in that the display device is operated in a sequential field with the red, green and blue secondary fields and the pixel bypass element cyclically deviates between at least two positions during the secondary fields of blue color.
5. 5. The projection display system according to claim 1, characterized in that the pixel deflection element is cyclically deviated by means of an electromechanical transducer.
6. 6. The projection display system according to claim 5, characterized in that the electromechanical transducer includes a piezoelectric transducer.
7. 7. The projection display system according to claim 5, characterized in that the electromechanical transducer does not include a piezoelectric transducer.
8. 8. A projection lens assembly for a projection display system, characterized in that it comprises: multiple projection lens elements; and a pixel bypass element in the vicinity of a stop position, positioned between projection lens elements of the projection lens assembly wherein the pixel bypass element deviates cyclically between, at least two positions in the projection lenses.
9. 9. The projection lens assembly according to claim 8, characterized in that the pixel deflection element is cyclically deviated between two vertically offset positions.
10. 10. The projection lens assembly according to claim 8, characterized in that the pixel deflection element deviates cyclically from four positions.
11. 11. The projection lens assembly according to claim 8, characterized in that the pixel deflection element includes a configurable wedge placed in the projection lens assembly and in which the cyclic deviation of the pixel bypass element includes the inclination of the wedge in a first and second configurations.
12. 12. The projection lens assembly according to claim 11 characterized in that the wedge includes a transparent wedge placed in the projection lens assembly and in which the cyclic deviation of the pixel bypass element includes the rotation about the axis that is extends through the wedge.
13. 13. A projection display system, characterized in that it comprises: a pixelated display device having an array of adjacent image elements; a lighting system that directs illumination light to the display device "pixelated to display information to be imparted to the light in which the lighting system includes a first and second light sources that alternately direct illumination along a first and second optical axes, and a projection lens assembly that receives light with display information imparted from the pixelated display device to project light through a display screen, the projection lens assembly includes a wedge element of pixel deflection, which includes a first and second wedge elements fixed by the ends that are aligned with the first and second optical axes, the pixel bypass wedge element cyclically provides deflection of the light with visualization information imparted to form on the display screen at least two interlocking arrangements e pixels.
14. 14. A projection display system, characterized in that it comprises: a pixelized display device; a lighting system that directs illumination light to the pixelated display device to display information to be imparted to light in a sequential field manner, the illumination light includes secondary fields of red, green and blue; and a projection lens assembly positioned to receive light imparted with display information by the pixelated display device for projecting the light onto a display screen; and a pixel shifting element that deviates cyclically between at least two positions only during the secondary fields of blue color and not during other secondary color fields to form on a display screen in at least two interlaced arrays of pixels.
15. 15. The projection display system according to claim 14, characterized in that the pixel deflection element is placed in the projection lens assembly.
16. 16. The projection display system according to claim 14, characterized in that the pixel deflection element includes a transparent wedge placed in the projection lens assembly, and in which the cyclic deflection of the pixel bypass element includes the inclination of the wedge between a first and second positions.
17. 17. A projection display system, characterized in that it comprises: a pixelated display device; a lighting system that directs illumination light to the pixelated display device to display information that is to be imparted to the light a projection lens assembly that receives light with display information imparted from the pixelated display device to project light toward a display screen including the mounting of projection lenses a pixel bypass element in the vicinity of a stop position, which deviates cyclically with non-rotational translation between at least two positions to form at least two arrays on the display screen interleaved pixels, the pixel bypass element including a fold mirror having a flat surface.