SPATIALLY MASKED UPDATE FOR ELECTRONIC PAPER DISPLAYS
Electronic Paper Displays can suffer from ghosting or previous images remaining partially visible after the display has updated to show a new image. A pseudo-random noise intermediate image is used to make the ghosting less visible to human observers. Further, other intermediate images can be used t...
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creator | GORMISH, Michael, J FENG, Guotong |
description | Electronic Paper Displays can suffer from ghosting or previous images remaining partially visible after the display has updated to show a new image. A pseudo-random noise intermediate image is used to make the ghosting less visible to human observers. Further, other intermediate images can be used to convey visible information or to convey secret information, e.g. a watermark. A control signal for driving the bi-stable display from the current optical state to an intermediate state, then to a final optical state is also determined. In some embodiments, the intermediate state for each pixel is determined in a pseudo-random manner. The pseudo-random noise values are applied to the bi-stable display to remove noise and other artifacts from the end resulting images. The determined control signal is applied to the bi-stable display to drive the bi-stable to the intermediate state, then to the final optical state. |
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A pseudo-random noise intermediate image is used to make the ghosting less visible to human observers. Further, other intermediate images can be used to convey visible information or to convey secret information, e.g. a watermark. A control signal for driving the bi-stable display from the current optical state to an intermediate state, then to a final optical state is also determined. In some embodiments, the intermediate state for each pixel is determined in a pseudo-random manner. The pseudo-random noise values are applied to the bi-stable display to remove noise and other artifacts from the end resulting images. The determined control signal is applied to the bi-stable display to drive the bi-stable to the intermediate state, then to the final optical state.</description><language>eng ; fre ; ger</language><subject>ADVERTISING ; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION ; CRYPTOGRAPHY ; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ; DISPLAY ; EDUCATION ; FREQUENCY-CHANGING ; NON-LINEAR OPTICS ; OPTICAL ANALOGUE/DIGITAL CONVERTERS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PHYSICS ; SEALS ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</subject><creationdate>2018</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180516&DB=EPODOC&CC=EP&NR=2054761B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180516&DB=EPODOC&CC=EP&NR=2054761B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GORMISH, Michael, J</creatorcontrib><creatorcontrib>FENG, Guotong</creatorcontrib><title>SPATIALLY MASKED UPDATE FOR ELECTRONIC PAPER DISPLAYS</title><description>Electronic Paper Displays can suffer from ghosting or previous images remaining partially visible after the display has updated to show a new image. A pseudo-random noise intermediate image is used to make the ghosting less visible to human observers. Further, other intermediate images can be used to convey visible information or to convey secret information, e.g. a watermark. A control signal for driving the bi-stable display from the current optical state to an intermediate state, then to a final optical state is also determined. In some embodiments, the intermediate state for each pixel is determined in a pseudo-random manner. The pseudo-random noise values are applied to the bi-stable display to remove noise and other artifacts from the end resulting images. The determined control signal is applied to the bi-stable display to drive the bi-stable to the intermediate state, then to the final optical state.</description><subject>ADVERTISING</subject><subject>ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION</subject><subject>CRYPTOGRAPHY</subject><subject>DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING</subject><subject>DISPLAY</subject><subject>EDUCATION</subject><subject>FREQUENCY-CHANGING</subject><subject>NON-LINEAR OPTICS</subject><subject>OPTICAL ANALOGUE/DIGITAL CONVERTERS</subject><subject>OPTICAL LOGIC ELEMENTS</subject><subject>OPTICS</subject><subject>PHYSICS</subject><subject>SEALS</subject><subject>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2018</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDANDnAM8XT08YlU8HUM9nZ1UQgNcHEMcVVw8w9ScPVxdQ4J8vfzdFYIcAxwDVJw8QwO8HGMDOZhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGuAUYGpibmZoZOhsZEKAEAqbonUw</recordid><startdate>20180516</startdate><enddate>20180516</enddate><creator>GORMISH, Michael, J</creator><creator>FENG, Guotong</creator><scope>EVB</scope></search><sort><creationdate>20180516</creationdate><title>SPATIALLY MASKED UPDATE FOR ELECTRONIC PAPER DISPLAYS</title><author>GORMISH, Michael, J ; FENG, Guotong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2054761B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2018</creationdate><topic>ADVERTISING</topic><topic>ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION</topic><topic>CRYPTOGRAPHY</topic><topic>DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING</topic><topic>DISPLAY</topic><topic>EDUCATION</topic><topic>FREQUENCY-CHANGING</topic><topic>NON-LINEAR OPTICS</topic><topic>OPTICAL ANALOGUE/DIGITAL CONVERTERS</topic><topic>OPTICAL LOGIC ELEMENTS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><topic>SEALS</topic><topic>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</topic><toplevel>online_resources</toplevel><creatorcontrib>GORMISH, Michael, J</creatorcontrib><creatorcontrib>FENG, Guotong</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GORMISH, Michael, J</au><au>FENG, Guotong</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>SPATIALLY MASKED UPDATE FOR ELECTRONIC PAPER DISPLAYS</title><date>2018-05-16</date><risdate>2018</risdate><abstract>Electronic Paper Displays can suffer from ghosting or previous images remaining partially visible after the display has updated to show a new image. A pseudo-random noise intermediate image is used to make the ghosting less visible to human observers. Further, other intermediate images can be used to convey visible information or to convey secret information, e.g. a watermark. A control signal for driving the bi-stable display from the current optical state to an intermediate state, then to a final optical state is also determined. In some embodiments, the intermediate state for each pixel is determined in a pseudo-random manner. The pseudo-random noise values are applied to the bi-stable display to remove noise and other artifacts from the end resulting images. The determined control signal is applied to the bi-stable display to drive the bi-stable to the intermediate state, then to the final optical state.</abstract><oa>free_for_read</oa></addata></record> |
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language | eng ; fre ; ger |
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subjects | ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CRYPTOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DISPLAY EDUCATION FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF |
title | SPATIALLY MASKED UPDATE FOR ELECTRONIC PAPER DISPLAYS |
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