Very high resolution light valve writing system based on tilting lower resolution flat panels
First Claim
1. Projection apparatus for projecting a relatively large high resolution image on a display screen, said apparatus comprising:
- an image source comprising a plurality of tiled image displays, said tiled image displays disposed in an object space of said apparatus;
relay optics disposed along optical paths of images projected by the respective tiled image displays;
a photoactivated reflective liquid crystal light valve disposed along the optical paths of the respective images relayed by the relay optics for receiving the images projected by the tiled image displays imaged onto an input surface thereof;
a polarizing beamsplitter disposed adjacent an output surface of the photoactivated reflective liquid crystal light valve;
an illumination source disposed adjacent the polarizing beamsplitter for providing illumination light that is projected by way of the polarizing beamsplitter onto the output surface of the photoactivated reflective liquid crystal light valve and which is reflected from the output surface back through the polarizing beamsplitter; and
a projection lens disposed adjacent an output surface of the polarizing beamsplitter for projecting the projection illumination light onto the display screen.
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Accused Products
Abstract
Projection apparatus comprising high resolution projection display systems that generate a relatively large high resolution image on a display screen, wherein seams and tiling artifacts in observation (image) space are eliminated or minimized. The projection apparatus comprises an image source that includes a plurality of small tiled image displays, relay optics, and a photoactivated reflective liquid crystal light valve. The small tiled or mosaic-like displays that provide source images that are displayed. The images projected by the image displays are imaged onto the light valve. A polarizing beamsplitter is disposed adjacent an output surface of the light valve, and an illumination source provides illumination light that is projected by way of the polarizing beamsplitter onto an output surface of the light valve. The illumination light is reflected from the output surface of the light valve back through the polarizing beamsplitter. A projection lens projects the illumination light onto the display screen. When the tiles are aligned so that the seams are a small fraction of a pixel, the light valve spatially low pass filters the tiled image, thereby eliminating the seams, and minimizing any tiling artifacts in the displayed image. A partially reflecting and transmitting beamsplitter may be disposed between the plurality of tiled image displays and the relay optics. This beamsplitter may be a thin glass plate, a thin quartz plate, or a pellicle. The plurality of tiled image displays may comprise flat panel displays or active matrix light valves. The relay optics may comprises a plurality of relay lenses or a single relay lens. The projection light may be continuous or sequentially imaged monochrome or red-green-blue (RGB) light provided by the illumination source.
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Citations
29 Claims
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1. Projection apparatus for projecting a relatively large high resolution image on a display screen, said apparatus comprising:
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an image source comprising a plurality of tiled image displays, said tiled image displays disposed in an object space of said apparatus; relay optics disposed along optical paths of images projected by the respective tiled image displays; a photoactivated reflective liquid crystal light valve disposed along the optical paths of the respective images relayed by the relay optics for receiving the images projected by the tiled image displays imaged onto an input surface thereof; a polarizing beamsplitter disposed adjacent an output surface of the photoactivated reflective liquid crystal light valve; an illumination source disposed adjacent the polarizing beamsplitter for providing illumination light that is projected by way of the polarizing beamsplitter onto the output surface of the photoactivated reflective liquid crystal light valve and which is reflected from the output surface back through the polarizing beamsplitter; and a projection lens disposed adjacent an output surface of the polarizing beamsplitter for projecting the projection illumination light onto the display screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. Projection apparatus for projecting a relatively large high resolution image on a display screen, said apparatus comprising:
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an image source comprising a plurality of tiled image displays, said tiled image displays disposed in an object space of said apparatus; relay optics disposed along optical paths of images projected by the respective tiled image displays; a photoactivated reflective liquid crystal light valve disposed along the optical paths of the respective images relayed by the relay optics for receiving the images projected by the tiled image displays imaged onto an input surface thereof; a polarizing beamsplitter disposed adjacent an output surface of the photoactivated reflective liquid crystal light valve; a beamsplitter disposed between the plurality of tiled image displays and the relay optics; an illumination source disposed adjacent the polarizing beamsplitter for providing illumination light that is projected by way of the polarizing beamsplitter onto the output surface of the photoactivated reflective liquid crystal light valve and which is reflected from the output surface back through the polarizing beamsplitter; and a projection lens disposed adjacent an output surface of the polarizing beamsplitter for projecting the projection illumination light onto the display screen. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification
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- Resources
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Current AssigneeHughes Aircraft Company (Rtx Corporation)
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Original AssigneeHughes Aircraft Company (Rtx Corporation)
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InventorsMead, Donald C., Gold, Ronald S., Fritz, Victor J.
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Primary Examiner(s)Kostak, Victor R.
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Assistant Examiner(s)Miller, John W.
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Application NumberUS08/316,782Time in Patent Office708 DaysField of Search348/383, 348/744, 348/750, 348/751, 348/752, 348/756, 348/757, 348/758, 348/778, 348/779, 348/780, 353/30, 353/31, 353/32, 353/33, 353/34, 353/37, 353/82US Class Current348/757CPC Class CodesH04N 9/3105 for displaying all colours ...
