EP 1743312 A2 20070117 - CONFIDENTIAL VIEWING SYSTEM UTILIZING SPATIAL MULTIPLEXING
Title (en)
CONFIDENTIAL VIEWING SYSTEM UTILIZING SPATIAL MULTIPLEXING
Title (de)
VERTRAULICHES BETRACHTUNGSSYSTEM MIT RÄUMLICHEM MULTIPLEXEN
Title (fr)
SYSTEME DE VISUALISATION CONFIDENTIELLE FAISANT APPEL A UN MULTIPLEXAGE SPATIAL
Publication
Application
Priority
- US 2005010807 W 20050330
- US 55790104 P 20040330
Abstract (en)
[origin: WO2005096740A2] 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.
IPC 8 full level
G09G 3/00 (2006.01); G02B 27/01 (2006.01); G06F 21/84 (2013.01); G09G 5/00 (2006.01); H04N 5/00 (2011.01); H04N 13/04 (2006.01); H04N 15/00 (2006.01); G02B 5/30 (2006.01)
CPC (source: EP)
G02B 27/0101 (2013.01); G06F 21/84 (2013.01); H04N 21/431 (2013.01); G02B 5/30 (2013.01); G02B 2027/012 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 2005096740 A2 20051020; WO 2005096740 A3 20060406; CA 2548192 A1 20051020; EP 1743312 A2 20070117; EP 1743312 A4 20080827; JP 2007537463 A 20071220
DOCDB simple family (application)
US 2005010807 W 20050330; CA 2548192 A 20050330; EP 05731230 A 20050330; JP 2007506526 A 20050330