LIQUID CRYSTAL DEVICE
PURPOSE:To enable dimming which generates no flicker even when the driving period of liquid crystal is variable by varying the illumination time of a light source and dimming the light source by a turn-on device which turns on the light source and setting the dimming period in an area wherein the li...
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| creator | IWAMOTO HIROBUMI YAMAMOTO TAKASHI |
| description | PURPOSE:To enable dimming which generates no flicker even when the driving period of liquid crystal is variable by varying the illumination time of a light source and dimming the light source by a turn-on device which turns on the light source and setting the dimming period in an area wherein the light output of the light source has no pause period. CONSTITUTION:The liquid crystal display device uses the discharge lamp which dims the light source by varying the ON time ratio of chopping control ad its turn-on circuit 12, whose chipping period is set in the area wherein the light output of the discharge lamp 13 has no OFF time. Namely, the dimming period Tch is set to |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_JPH03296715A</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>JPH03296715A</sourcerecordid><originalsourceid>FETCH-epo_espacenet_JPH03296715A3</originalsourceid><addsrcrecordid>eNrjZBD18QwM9XRRcA6KDA5x9FFwcQ3zdHblYWBNS8wpTuWF0twMim6uIc4euqkF-fGpxQWJyal5qSXxXgEeBsZGlmbmhqaOxsSoAQCcYx8a</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>LIQUID CRYSTAL DEVICE</title><source>esp@cenet</source><creator>IWAMOTO HIROBUMI ; YAMAMOTO TAKASHI</creator><creatorcontrib>IWAMOTO HIROBUMI ; YAMAMOTO TAKASHI</creatorcontrib><description>PURPOSE:To enable dimming which generates no flicker even when the driving period of liquid crystal is variable by varying the illumination time of a light source and dimming the light source by a turn-on device which turns on the light source and setting the dimming period in an area wherein the light output of the light source has no pause period. CONSTITUTION:The liquid crystal display device uses the discharge lamp which dims the light source by varying the ON time ratio of chopping control ad its turn-on circuit 12, whose chipping period is set in the area wherein the light output of the discharge lamp 13 has no OFF time. Namely, the dimming period Tch is set to <=3 times as long as the turn-on period Tl. Consequently, the light output of the discharge lamp 13 connected to the turn-on circuit 12 has no pause period. Therefore, the pause period of the light output and the liquid crystal driving period have no interference in principle. Consequently, even when the driving period is variable for the optimum driving of liquid crystal, the dimming becomes possible without generating an unpleasant flicker such as interference between the driving period and the chopping period for the dimming.</description><language>eng</language><subject>ADVERTISING ; 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 ; DISPLAYING ; EDUCATION ; ELECTRIC HEATING ; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ; ELECTRICITY ; FREQUENCY-CHANGING ; LABELS OR NAME-PLATES ; NON-LINEAR OPTICS ; OPTICAL ANALOGUE/DIGITAL CONVERTERS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PHYSICS ; SEALS ; SIGNS ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</subject><creationdate>1991</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=19911227&DB=EPODOC&CC=JP&NR=H03296715A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19911227&DB=EPODOC&CC=JP&NR=H03296715A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>IWAMOTO HIROBUMI</creatorcontrib><creatorcontrib>YAMAMOTO TAKASHI</creatorcontrib><title>LIQUID CRYSTAL DEVICE</title><description>PURPOSE:To enable dimming which generates no flicker even when the driving period of liquid crystal is variable by varying the illumination time of a light source and dimming the light source by a turn-on device which turns on the light source and setting the dimming period in an area wherein the light output of the light source has no pause period. CONSTITUTION:The liquid crystal display device uses the discharge lamp which dims the light source by varying the ON time ratio of chopping control ad its turn-on circuit 12, whose chipping period is set in the area wherein the light output of the discharge lamp 13 has no OFF time. Namely, the dimming period Tch is set to <=3 times as long as the turn-on period Tl. Consequently, the light output of the discharge lamp 13 connected to the turn-on circuit 12 has no pause period. Therefore, the pause period of the light output and the liquid crystal driving period have no interference in principle. Consequently, even when the driving period is variable for the optimum driving of liquid crystal, the dimming becomes possible without generating an unpleasant flicker such as interference between the driving period and the chopping period for the dimming.</description><subject>ADVERTISING</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>DISPLAYING</subject><subject>EDUCATION</subject><subject>ELECTRIC HEATING</subject><subject>ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRICITY</subject><subject>FREQUENCY-CHANGING</subject><subject>LABELS OR NAME-PLATES</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>SIGNS</subject><subject>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1991</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBD18QwM9XRRcA6KDA5x9FFwcQ3zdHblYWBNS8wpTuWF0twMim6uIc4euqkF-fGpxQWJyal5qSXxXgEeBsZGlmbmhqaOxsSoAQCcYx8a</recordid><startdate>19911227</startdate><enddate>19911227</enddate><creator>IWAMOTO HIROBUMI</creator><creator>YAMAMOTO TAKASHI</creator><scope>EVB</scope></search><sort><creationdate>19911227</creationdate><title>LIQUID CRYSTAL DEVICE</title><author>IWAMOTO HIROBUMI ; YAMAMOTO TAKASHI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH03296715A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1991</creationdate><topic>ADVERTISING</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>DISPLAYING</topic><topic>EDUCATION</topic><topic>ELECTRIC HEATING</topic><topic>ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRICITY</topic><topic>FREQUENCY-CHANGING</topic><topic>LABELS OR NAME-PLATES</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>SIGNS</topic><topic>TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</topic><toplevel>online_resources</toplevel><creatorcontrib>IWAMOTO HIROBUMI</creatorcontrib><creatorcontrib>YAMAMOTO TAKASHI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>IWAMOTO HIROBUMI</au><au>YAMAMOTO TAKASHI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>LIQUID CRYSTAL DEVICE</title><date>1991-12-27</date><risdate>1991</risdate><abstract>PURPOSE:To enable dimming which generates no flicker even when the driving period of liquid crystal is variable by varying the illumination time of a light source and dimming the light source by a turn-on device which turns on the light source and setting the dimming period in an area wherein the light output of the light source has no pause period. CONSTITUTION:The liquid crystal display device uses the discharge lamp which dims the light source by varying the ON time ratio of chopping control ad its turn-on circuit 12, whose chipping period is set in the area wherein the light output of the discharge lamp 13 has no OFF time. Namely, the dimming period Tch is set to <=3 times as long as the turn-on period Tl. Consequently, the light output of the discharge lamp 13 connected to the turn-on circuit 12 has no pause period. Therefore, the pause period of the light output and the liquid crystal driving period have no interference in principle. Consequently, even when the driving period is variable for the optimum driving of liquid crystal, the dimming becomes possible without generating an unpleasant flicker such as interference between the driving period and the chopping period for the dimming.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADVERTISING 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 DISPLAYING EDUCATION ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FREQUENCY-CHANGING LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF |
| title | LIQUID CRYSTAL DEVICE |
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