WO2008002433A3 - Lcd-based confidential viewing apparatus utilizing auto-inversion masking - Google Patents

Lcd-based confidential viewing apparatus utilizing auto-inversion masking Download PDF

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Publication number
WO2008002433A3
WO2008002433A3 PCT/US2007/014350 US2007014350W WO2008002433A3 WO 2008002433 A3 WO2008002433 A3 WO 2008002433A3 US 2007014350 W US2007014350 W US 2007014350W WO 2008002433 A3 WO2008002433 A3 WO 2008002433A3
Authority
WO
WIPO (PCT)
Prior art keywords
variable
polarizers
image
viewing
eyewear
Prior art date
Application number
PCT/US2007/014350
Other languages
French (fr)
Other versions
WO2008002433A2 (en
Inventor
David A Struyk
Original Assignee
Waterstrike Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Waterstrike Inc filed Critical Waterstrike Inc
Publication of WO2008002433A2 publication Critical patent/WO2008002433A2/en
Publication of WO2008002433A3 publication Critical patent/WO2008002433A3/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/0136—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/16—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 series; tandem
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/07—Polarisation dependent

Abstract

A display apparatus having a pair of polarizers with an optical rotator therebetween, one of the polarizers being a variable polarizer which is independently operated to alternate between substantially orthogonal states of polarization and cause the display to rapidly alternate between a normal positive and inverted negative image, creating a combined neutral image that in indecipherable to the naked eye. Shutter eyewear synchronized with the variable polarizer is used to extract the positive image for viewing by an intended viewer. In another embodiment, both polarizers of the display apparatus are independently variable, which allows for viewing of the desired image using passive polarized eyewear or eyewear incorporating synchronized variable polarizing rotators. Faster independent operation of the variable polarizers provide for flicker-free viewing of the desired image and convenient switching between normal and secure modes of operation, without physical alteration of the display.
PCT/US2007/014350 2006-06-23 2007-06-20 Lcd-based confidential viewing apparatus utilizing auto-inversion masking WO2008002433A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/473,592 US7791686B2 (en) 2006-06-23 2006-06-23 LCD-based confidential viewing apparatus utilizing auto-inversion masking
US11/473,592 2006-06-23

Publications (2)

Publication Number Publication Date
WO2008002433A2 WO2008002433A2 (en) 2008-01-03
WO2008002433A3 true WO2008002433A3 (en) 2008-11-27

Family

ID=38846181

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/014350 WO2008002433A2 (en) 2006-06-23 2007-06-20 Lcd-based confidential viewing apparatus utilizing auto-inversion masking

Country Status (2)

Country Link
US (1) US7791686B2 (en)
WO (1) WO2008002433A2 (en)

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US20100079676A1 (en) * 2008-09-29 2010-04-01 International Business Machines Corporation Providing Multi-User Views
US8472115B2 (en) * 2008-12-08 2013-06-25 Konica Minolta Opto, Inc. Anistropic dye layer, coordination polymer for anistropic dye layer and polarization element, and polarization control film, polarization control element, multi-layer polarization control element, ellipse polarization plate, light emission element, and method for controlling polarization properties employing the anistropic dye layer
US8571217B2 (en) * 2008-12-18 2013-10-29 Nec Corporation Display system, control apparatus, display method, and program
TWI417571B (en) * 2010-01-18 2013-12-01 Chunghwa Picture Tubes Ltd Stereoscopic display device
TWI411293B (en) * 2010-08-06 2013-10-01 Acer Inc Viewing glasses, 3d display system and image beam adjustment method thereof
US8966656B2 (en) 2011-10-21 2015-02-24 Blackberry Limited Displaying private information using alternate frame sequencing
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US11468639B2 (en) * 2015-02-20 2022-10-11 Microsoft Technology Licensing, Llc Selective occlusion system for augmented reality devices
CN106353913A (en) * 2016-10-10 2017-01-25 南京中电熊猫液晶显示科技有限公司 Anti-peeping liquid crystal display panel and working method thereof
CN106292099A (en) * 2016-10-10 2017-01-04 南京中电熊猫液晶显示科技有限公司 Peep-proof display panels and method of work thereof
US11025892B1 (en) 2018-04-04 2021-06-01 James Andrew Aman System and method for simultaneously providing public and private images
CN112578583A (en) * 2019-09-30 2021-03-30 京东方科技集团股份有限公司 Display panel, manufacturing method thereof and display device

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Also Published As

Publication number Publication date
WO2008002433A2 (en) 2008-01-03
US20070296889A1 (en) 2007-12-27
US7791686B2 (en) 2010-09-07

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