Enhanced contrast projection screen
AssigneeHewlett-Packard Development Company, L.P.
InventorsAntonio S. Cruz-Uribe, William J. Allen, John Christopher Rudin, Andrew Arthur Hunter, Andrew L. Van Brocklin
Life of this patent
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Abstract
A projection screen is provided that includes a display surface having a plurality of elements. Each element has an optical property that is responsive to an appropriate applied voltage. The display surface may be configured so that the optical properties of each element may be coordinated with the projected image.
Claims24
A projection screen for displaying a projected image, comprising:
- a display surface having display regions, with individual of the display regions having an optical property that may be changed by applying an appropriate voltage to the individual of the display regions,;
- and
- a reflectance processor and at least one electrode controller associated with each of the display regions and configured to coordinate the optical property of each of the display regions with content of a corresponding portion of the image.
A display system, comprising:
- a projector configured to project an image;
- a projection screen including:
- a plurality of pixel elements, where the pixel elements are configured so that the optical properties of a particular pixel element may be altered;
- and
- a display controller configured to modify pixel element optical properties to coordinate with a portion of the image incident on that pixel element by projecting a control image as nonvisible radiation.
A method of making an active projection screen, comprising:
- providing a surface that incorporates a plurality of cells, each of the plurality of the cells configured to have an optical property varied;
- and
- providing a display controller including a reflectance processor and at least one electrode controller associated with each of the plurality of cells, with the display controller capable of coordinating the optical property of each of the plurality of cells with an optical characteristic of a portion of an image projected thereon.
A method of coordinating the optical properties of a screen with a projected image, comprising:
- providing a screen having display regions, each of the display regions including one or more pixel elements incorporating a plurality of selectable color characteristics, and each of the display regions configured so that one or more optical properties of each of the display regions are individually controllable;
- projecting the projected image onto the screen;
- and
- synchronizing the one or more optical properties of each of the display regions with an optical characteristic of a portion of the projected image projected onto a corresponding one of the display regions.
A projection screen, comprising:
- means for displaying a projected image, including a plurality of optical elements;
- means for changing the optical properties of each optical element
- means for coordinating the optical properties of each optical element with a corresponding portion of the projected image by projecting a control image as nonvisible radiation with the control image based on content of the corresponding portion of the projected image.
Dependencies are inferred from the claim text.