PIXEL-SHIFTING PROJECTION LENS ASSEMBLY TO PROVIDE OPTICAL INTERLACING FOR INCREASED ADDRESSABILITY
First Claim
1. A projection display system, comprising:
- a pixelated display device;
an illumination system that directs illumination light to the pixelated display device for display information to be imparted on the light; and
a projection lens assembly that receives the light with imparted display information from the pixelated display device for projecting the light toward a display screen, the projection lens assembly including a pixel-shifting element that cyclically shifts between at least two positions within the projections lens assembly to form at the display screen at least two interlaced arrays of pixels, the pixel-shifting element including a fold mirror positioned within the projection lens assembly and in which the cyclic shifting of the pixel-shifting element includes cyclic tilting of the fold mirror.
1 Assignment
0 Petitions
Accused Products
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 electromechanical transducer is coupled to the pixel-shifting element to impart on it the cyclic shifting between positions.
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Citations
27 Claims
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1. A projection display system, comprising:
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a pixelated display device;
an illumination system that directs illumination light to the pixelated display device for display information to be imparted on the light; and
a projection lens assembly that receives the light with imparted display information from the pixelated display device for projecting the light toward a display screen, the projection lens assembly including a pixel-shifting element that cyclically shifts between at least two positions within the projections lens assembly to form at the display screen at least two interlaced arrays of pixels, the pixel-shifting element including a fold mirror positioned within the projection lens assembly and in which the cyclic shifting of the pixel-shifting element includes cyclic tilting of the fold mirror. - View Dependent Claims (2, 3, 4, 8, 9, 10, 11)
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5. (canceled)
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6. (canceled)
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7. (canceled)
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12. A projection lens assembly for a projection display system, comprising:
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multiple projection lens elements; and
a pixel-shifting element having a wedge that is positioned between projection lens elements of the projection lens assembly and that cyclically shifts between at least two positions within the projection lens assembly. - View Dependent Claims (13, 14, 15, 16)
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17. (canceled)
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18. (canceled)
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19. A projection display system, comprising:
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a pixelated display device having an array of adjacent picture elements;
an illumination system that directs illumination light to the pixelated display device for display information to be imparted on the light; and
a projection lens assembly that receives the light with imparted display information from the pixelated display device for projecting the light toward a display screen, the projection lens assembly including a pixel-shifting wedge element that cyclically provides shifting of the light with imparted display information to form at the display screen at least two interlaced arrays of pixels. - View Dependent Claims (20, 21)
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22. A projection display system, comprising:
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a pixelated display device;
an illumination system that directs illumination light to the pixelated display device for display information to be imparted on the light in a field-sequential manner, the illumination light including successive red, green, and blue color sub-fields; and
a projection lens assembly positioned to receive light imparted with display information by the pixelated display device to project the light toward a display screen; and
a pixel-shifting element that cyclically shifts between at least two positions only during blue color sub-fields and not during other color sub-fields to form at a display screen at least interlaced arrays of pixels. - View Dependent Claims (23, 24)
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25. A projection display system, comprising:
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a pixelated display device;
an illumination system that directs illumination light to the pixelated display device for display information to be imparted on the light;
a projection lens assembly that receives the light with imparted display information from the pixelated display device for projecting the light toward a display screen; and
a pixel-shifting element that cyclically shifts with non-rotational translation between at least two positions to form at the display screen at least two interlaced arrays of pixels, the pixel-shifting element including a fold mirror that has a planar surface and is positioned between the illumination system and the display screen and in which the non-rotational translation occurs in a direction transverse to the plane of the fold mirror. - View Dependent Claims (26)
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27. (canceled)
Specification