Confidential Viewing System Utilizing Spatial Multiplexing
First Claim
1. An apparatus for confidential viewing of a fundamental image utilizing spatial multiplexing image modification, comprising:
- (a) an image display device comprising a plurality of adjacent display regions of different polarization states.(b) a plurality of spatially multiplexed fundamental image components and related masking image components derived from said fundamental image components being displayed on said image display device in association with said display regions and in such arrangement as to render said fundamental image components substantially indecipherable to the naked eye;
(c) said fundamental image components being representative of a fundamental image and being associated with said display regions having a common state of polarization that is different than the state of polarization of said display regions with which said masking image components are associated; and
(d) an image viewing device having polarization means cooperating with said image display device for allowing extraction and viewing only of said fundamental image components from said image display device.
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Accused Products
Abstract
An apparatus and method for providing confidential viewing of a fundamental image on an image display device utilizing spatial multiplexing image modification, whereby fundamental image components of the fundamental image are spatially multiplexed or combined with appropriately determined inverted image components thereof, and aligned with adjacent display regions/pixels of an image display device so as to neutralize the fundamental image and generate a combined image that appears substantially featureless to the naked eye. The display pixels aligned with the fundamental image components are cross-polarized relative to the adjacent pixels aligned with the inverted image components, thereby providing for extraction of the fundamental image by an authorized viewer wearing appropriate eyewear polarized to correlate with the state of polarization of the pixels aligned with the fundamental image components. Enhanced security may be provided by utilizing a variable polarizer to alter the state of polarization of the respective display regions, or by altering the position of fundamental and inverse image components to align with differently polarized display regions. Extraction of the fundamental image may then be accomplished by using active polarized eyewear synchronized to correlate in polarization with the pixels aligned with the fundamental image components.
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Citations
56 Claims
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1. An apparatus for confidential viewing of a fundamental image utilizing spatial multiplexing image modification, comprising:
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(a) an image display device comprising a plurality of adjacent display regions of different polarization states. (b) a plurality of spatially multiplexed fundamental image components and related masking image components derived from said fundamental image components being displayed on said image display device in association with said display regions and in such arrangement as to render said fundamental image components substantially indecipherable to the naked eye; (c) said fundamental image components being representative of a fundamental image and being associated with said display regions having a common state of polarization that is different than the state of polarization of said display regions with which said masking image components are associated; and (d) an image viewing device having polarization means cooperating with said image display device for allowing extraction and viewing only of said fundamental image components from said image display device. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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2. (canceled)
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22. An apparatus for confidential viewing of a fundamental image utilizing spatial multiplexing image modification, comprising:
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(a) an image display device comprising a plurality of adjacent display regions of different polarization states. (b) means for generating an image on said image display device having a fundamental image component and a corresponding inverse image component spatially arranged in association with said display regions so as to form a combined image that appears substantially featureless to the naked eye; (c) said image generating means and said image display device cooperatively communicating so that said fundamental image component is associated with at least one of said display regions having a polarization state different than that with which said inverse image component is associated; and (d) image viewing means cooperatively polarized with said display regions of said image display device for allowing viewing only of said fundamental image component of said combined substantially featureless image. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method for confidential viewing of a fundamental image utilizing spatial multiplexing image modification, comprising the steps of:
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(a) polarizing adjacently positioned display regions of an image display device with different states of polarization; (b) displaying spatially multiplexed fundamental image components of a fundamental image with corresponding inverse image components thereof on said image display device in such arrangement as to neutralize and render said fundamental image components substantially invisible to the naked eye, whereby said fundamental image components are associated with said display regions having a state of polarization different than that with which said inverse image components are associated; and (c) viewing said image display device through a polarized filtering means that communicates with said image display device and allows passage and viewing only of said fundamental image components of said fundamental image. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A method for confidential viewing of a fundamental image utilizing spatial multiplexing image modification, comprising the steps of:
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(a) positioning a transparent polarizing overlay over an image display device, said overlay comprising a plurality of adjacently positioned polarizers having different polarization states; (b) producing a compound image on said display device that is comprised of a plurality of spatially multiplexed fundamental image components and masking image components aligned with said polarizers of said overlay, whereby said fundamental image components are representative of a fundamental image and said masking image components are derived from said fundamental image components, said fundamental image components being aligned with a group of said polarizers having a common state of polarization different from that with which said masking image components are aligned; and (c) viewing said compound image through said overlay utilizing a lens filter polarized in such manner as to allow passage and viewing only of said fundamental image components of said fundamental image. - View Dependent Claims (55, 56)
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Specification