PHASE MODULATOR, AND PHASE MODULATION METHOD
To provide a phase modulator and a phase modulation method that are capable of increasing a modulation amount of a phase without increasing voltage applied from a column data line to a pixel circuit.SOLUTION: A phase modulator comprises: a plurality of pixel circuits 21 and a plurality of reflection...
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| creator | OE KENSHO IZAWA TOSHISUKE NAGOYA TAKASHI |
| description | To provide a phase modulator and a phase modulation method that are capable of increasing a modulation amount of a phase without increasing voltage applied from a column data line to a pixel circuit.SOLUTION: A phase modulator comprises: a plurality of pixel circuits 21 and a plurality of reflection pixels; a liquid crystal 42 in which refraction indexes to incident light are changed by drive voltages applied by the pixel circuits 21; and a control circuit 22 for controlling the drive of the pixel circuits 21. A comparator circuit 28 is provided that outputs a switching control signal when a gradation value corresponding to each of the pixel circuits 21 and a count value output from a counter circuit 29 are coincident with each other. A lamp-shaped reference voltage, which changes up to a predetermined maximum voltage, is applied to a wiring connected with a column data line via a switching circuit 27. A control voltage is determined by switching off at a timing of the switching control signal, and is held in each of the pixel circuits 21. In a case where a drive voltage applied to the liquid crystal 42 is the maximum voltage or less, the control voltage is output to the liquid crystal 42 without amplification. In a case where the drive voltage exceeds the maximum voltage, the control voltage is amplified by a charge pump 31 and is output to the liquid crystal 42.SELECTED DRAWING: Figure 3
【課題】列データ線から画素回路に供給する電圧を高めることなく、位相の変調量を大きくすることが可能な位相変調装置、及び位相変調方法を提供する。【解決手段】複数の画素回路２１及び複数の反射画素と、画素回路２１より供給される駆動電圧により入射光に対する屈折率が変化する液晶４２と、画素回路２１の駆動を制御する制御回路２２を備える。各画素回路２１に対応した階調値とカウンタ回路２９から出力されるカウント値が一致した場合にスイッチング制御信号を出力するコンパレータ回路２８を設けており、列データ線とスイッチ回路２７を介して接続された配線に所定の最大電圧まで変化するランプ状の参照電圧が印加されており、スイッチング制御信号のタイミングでスイッチが切れることで制御電圧を決定し各画素回路２１に保持される。液晶４２に供給する駆動電圧が最大電圧以下の場合には、制御電圧を増幅せずに液晶４２に出力し、超える場合には制御電圧をチャージポンプ３１で増幅して液晶４２に出力する。【選択図】 図３ |
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【課題】列データ線から画素回路に供給する電圧を高めることなく、位相の変調量を大きくすることが可能な位相変調装置、及び位相変調方法を提供する。【解決手段】複数の画素回路２１及び複数の反射画素と、画素回路２１より供給される駆動電圧により入射光に対する屈折率が変化する液晶４２と、画素回路２１の駆動を制御する制御回路２２を備える。各画素回路２１に対応した階調値とカウンタ回路２９から出力されるカウント値が一致した場合にスイッチング制御信号を出力するコンパレータ回路２８を設けており、列データ線とスイッチ回路２７を介して接続された配線に所定の最大電圧まで変化するランプ状の参照電圧が印加されており、スイッチング制御信号のタイミングでスイッチが切れることで制御電圧を決定し各画素回路２１に保持される。液晶４２に供給する駆動電圧が最大電圧以下の場合には、制御電圧を増幅せずに液晶４２に出力し、超える場合には制御電圧をチャージポンプ３１で増幅して液晶４２に出力する。【選択図】 図３</description><language>eng ; jpn</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>2020</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=20201001&DB=EPODOC&CC=JP&NR=2020160175A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201001&DB=EPODOC&CC=JP&NR=2020160175A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OE KENSHO</creatorcontrib><creatorcontrib>IZAWA TOSHISUKE</creatorcontrib><creatorcontrib>NAGOYA TAKASHI</creatorcontrib><title>PHASE MODULATOR, AND PHASE MODULATION METHOD</title><description>To provide a phase modulator and a phase modulation method that are capable of increasing a modulation amount of a phase without increasing voltage applied from a column data line to a pixel circuit.SOLUTION: A phase modulator comprises: a plurality of pixel circuits 21 and a plurality of reflection pixels; a liquid crystal 42 in which refraction indexes to incident light are changed by drive voltages applied by the pixel circuits 21; and a control circuit 22 for controlling the drive of the pixel circuits 21. A comparator circuit 28 is provided that outputs a switching control signal when a gradation value corresponding to each of the pixel circuits 21 and a count value output from a counter circuit 29 are coincident with each other. A lamp-shaped reference voltage, which changes up to a predetermined maximum voltage, is applied to a wiring connected with a column data line via a switching circuit 27. A control voltage is determined by switching off at a timing of the switching control signal, and is held in each of the pixel circuits 21. In a case where a drive voltage applied to the liquid crystal 42 is the maximum voltage or less, the control voltage is output to the liquid crystal 42 without amplification. In a case where the drive voltage exceeds the maximum voltage, the control voltage is amplified by a charge pump 31 and is output to the liquid crystal 42.SELECTED DRAWING: Figure 3
【課題】列データ線から画素回路に供給する電圧を高めることなく、位相の変調量を大きくすることが可能な位相変調装置、及び位相変調方法を提供する。【解決手段】複数の画素回路２１及び複数の反射画素と、画素回路２１より供給される駆動電圧により入射光に対する屈折率が変化する液晶４２と、画素回路２１の駆動を制御する制御回路２２を備える。各画素回路２１に対応した階調値とカウンタ回路２９から出力されるカウント値が一致した場合にスイッチング制御信号を出力するコンパレータ回路２８を設けており、列データ線とスイッチ回路２７を介して接続された配線に所定の最大電圧まで変化するランプ状の参照電圧が印加されており、スイッチング制御信号のタイミングでスイッチが切れることで制御電圧を決定し各画素回路２１に保持される。液晶４２に供給する駆動電圧が最大電圧以下の場合には、制御電圧を増幅せずに液晶４２に出力し、超える場合には制御電圧をチャージポンプ３１で増幅して液晶４２に出力する。【選択図】 図３</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>2020</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNAJ8HAMdlXw9XcJ9XEM8Q_SUXD0c1FAEfT091PwdQ3x8HfhYWBNS8wpTuWF0twMSm6uIc4euqkF-fGpxQWJyal5qSXxXgFGBkYGhmYGhuamjsZEKQIAztAlbA</recordid><startdate>20201001</startdate><enddate>20201001</enddate><creator>OE KENSHO</creator><creator>IZAWA TOSHISUKE</creator><creator>NAGOYA TAKASHI</creator><scope>EVB</scope></search><sort><creationdate>20201001</creationdate><title>PHASE MODULATOR, AND PHASE MODULATION METHOD</title><author>OE KENSHO ; IZAWA TOSHISUKE ; NAGOYA TAKASHI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2020160175A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2020</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>OE KENSHO</creatorcontrib><creatorcontrib>IZAWA TOSHISUKE</creatorcontrib><creatorcontrib>NAGOYA TAKASHI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>OE KENSHO</au><au>IZAWA TOSHISUKE</au><au>NAGOYA TAKASHI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PHASE MODULATOR, AND PHASE MODULATION METHOD</title><date>2020-10-01</date><risdate>2020</risdate><abstract>To provide a phase modulator and a phase modulation method that are capable of increasing a modulation amount of a phase without increasing voltage applied from a column data line to a pixel circuit.SOLUTION: A phase modulator comprises: a plurality of pixel circuits 21 and a plurality of reflection pixels; a liquid crystal 42 in which refraction indexes to incident light are changed by drive voltages applied by the pixel circuits 21; and a control circuit 22 for controlling the drive of the pixel circuits 21. A comparator circuit 28 is provided that outputs a switching control signal when a gradation value corresponding to each of the pixel circuits 21 and a count value output from a counter circuit 29 are coincident with each other. A lamp-shaped reference voltage, which changes up to a predetermined maximum voltage, is applied to a wiring connected with a column data line via a switching circuit 27. A control voltage is determined by switching off at a timing of the switching control signal, and is held in each of the pixel circuits 21. In a case where a drive voltage applied to the liquid crystal 42 is the maximum voltage or less, the control voltage is output to the liquid crystal 42 without amplification. In a case where the drive voltage exceeds the maximum voltage, the control voltage is amplified by a charge pump 31 and is output to the liquid crystal 42.SELECTED DRAWING: Figure 3
【課題】列データ線から画素回路に供給する電圧を高めることなく、位相の変調量を大きくすることが可能な位相変調装置、及び位相変調方法を提供する。【解決手段】複数の画素回路２１及び複数の反射画素と、画素回路２１より供給される駆動電圧により入射光に対する屈折率が変化する液晶４２と、画素回路２１の駆動を制御する制御回路２２を備える。各画素回路２１に対応した階調値とカウンタ回路２９から出力されるカウント値が一致した場合にスイッチング制御信号を出力するコンパレータ回路２８を設けており、列データ線とスイッチ回路２７を介して接続された配線に所定の最大電圧まで変化するランプ状の参照電圧が印加されており、スイッチング制御信号のタイミングでスイッチが切れることで制御電圧を決定し各画素回路２１に保持される。液晶４２に供給する駆動電圧が最大電圧以下の場合には、制御電圧を増幅せずに液晶４２に出力し、超える場合には制御電圧をチャージポンプ３１で増幅して液晶４２に出力する。【選択図】 図３</abstract><oa>free_for_read</oa></addata></record> |
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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 | PHASE MODULATOR, AND PHASE MODULATION METHOD |
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