Enhanced contrast projection screen
First Claim
1. A projection screen for displaying a projected image with enhanced contrast, comprising a display surface having a plurality of elements, where each element has an optical property that may be changed by applying an appropriate voltage to the element, where the display surface is configured to coordinate the optical property of each element with the projected image.
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Accused Products
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.
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Citations
43 Claims
- 1. A projection screen for displaying a projected image with enhanced contrast, comprising a display surface having a plurality of elements, where each element has an optical property that may be changed by applying an appropriate voltage to the element, where the display surface is configured to coordinate the optical property of each element with the projected image.
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19. A display system, comprising:
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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 by application of an appropriate voltage to the pixel element;
a plurality of electrodes configured to selectively and independently apply the appropriate voltage to each pixel element; and
a display controller configured to modify pixel element optical properties to coordinate with the projected optical image by applying the appropriate voltage to the electrodes. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of making an active projection screen, comprising:
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providing a surface that incorporates a plurality of cells, each cell configured so that the optical properties of the cell may be varied by application of an appropriate voltage to the cell;
providing a plurality of electrodes that are configured to apply the appropriate voltage to each cell; and
providing a display controller that is capable of applying the appropriate voltage to the plurality of electrodes in order to coordinate the optical properties of the surface with an image projected thereon.
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34. A method of coordinating the optical properties of a screen with a projected image, comprising:
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providing a screen having a plurality of elements, each element configured so that the optical properties of each element are controlled by applying an appropriate voltage to the element;
projecting the image onto the screen; and
synchronizing the optical properties of each element with the content of the portion of the projected image projected onto that element. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42)
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43. A projection screen, comprising:
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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 pixel element with the projected image.
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Specification