Time-Sequential Ultraviolet Exposure to Alignment Layers Embedded With Reactive Mesogen for High-Speed In-Plane Switching Liquid Crystal Cell
We propose a time-sequential ultraviolet (UV) exposure process that can improve the surface anchoring energy of photopolyimide (PI) embedded with reactive mesogen (RM) in high-speed liquid crystal (LC) display devices. To increase the anchoring energy of the PI layer, a separated UV exposure process...
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| Veröffentlicht in: | IEEE transactions on electron devices 2016-11, Vol.63 (11), p.4326-4330 |
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| container_title | IEEE transactions on electron devices |
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| creator | Mun, Byung-June Park, Ki-Woong Baek, Ji-Ho Kim, Byeong Koo Choi, Hyun Chul Kim, Changwan Kang, Bongsoon Lee, Seung Hee Lee, Gi-Dong |
| description | We propose a time-sequential ultraviolet (UV) exposure process that can improve the surface anchoring energy of photopolyimide (PI) embedded with reactive mesogen (RM) in high-speed liquid crystal (LC) display devices. To increase the anchoring energy of the PI layer, a separated UV exposure process of polymerization for the embedded RM material and PI layer is required [1]-[8]. In this paper, we propose a novel single-frequency UV exposure method that can perform the separated polymerization of the UV alignment layer and the embedded RM material by optimizing the intensity of the exposure UV light. Using the proposed UV exposure method, we polymerize the RM material during the first 4 s, and then accomplish the polymerization of the UV alignment layer sequentially. To demonstrate the electro-optical performance, we measure the surface anchoring energy and the optical response time of in-plane switching LC cell. The measured results show that the surface anchoring energy and the optical response time are improved by more than 2.5 times and 28.2%, respectively, compared with the conventional UV exposure. |
| doi_str_mv | 10.1109/TED.2016.2612634 |
| format | Article |
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To increase the anchoring energy of the PI layer, a separated UV exposure process of polymerization for the embedded RM material and PI layer is required [1]-[8]. In this paper, we propose a novel single-frequency UV exposure method that can perform the separated polymerization of the UV alignment layer and the embedded RM material by optimizing the intensity of the exposure UV light. Using the proposed UV exposure method, we polymerize the RM material during the first 4 s, and then accomplish the polymerization of the UV alignment layer sequentially. To demonstrate the electro-optical performance, we measure the surface anchoring energy and the optical response time of in-plane switching LC cell. The measured results show that the surface anchoring energy and the optical response time are improved by more than 2.5 times and 28.2%, respectively, compared with the conventional UV exposure.</description><identifier>ISSN: 0018-9383</identifier><identifier>EISSN: 1557-9646</identifier><identifier>DOI: 10.1109/TED.2016.2612634</identifier><identifier>CODEN: IETDAI</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>In-plane switching (IPS) ; liquid crystal ; Optical polarization ; Optical polymers ; Optical variables measurement ; Polymerization ; reactive mesogen (RM) ; response time ; surface anchoring energy ; Surface treatment ; Time factors ; Time measurement ; ultraviolet (UV) exposure ; Ultraviolet radiation</subject><ispartof>IEEE transactions on electron devices, 2016-11, Vol.63 (11), p.4326-4330</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2016</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c361t-675280128d1beb3076ffcdf2e0693ddea344418a89be30dd6f218c4045f4598e3</citedby><cites>FETCH-LOGICAL-c361t-675280128d1beb3076ffcdf2e0693ddea344418a89be30dd6f218c4045f4598e3</cites><orcidid>0000-0002-4402-1570</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/7582362$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,777,781,793,27905,27906,54739</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/7582362$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Mun, Byung-June</creatorcontrib><creatorcontrib>Park, Ki-Woong</creatorcontrib><creatorcontrib>Baek, Ji-Ho</creatorcontrib><creatorcontrib>Kim, Byeong Koo</creatorcontrib><creatorcontrib>Choi, Hyun Chul</creatorcontrib><creatorcontrib>Kim, Changwan</creatorcontrib><creatorcontrib>Kang, Bongsoon</creatorcontrib><creatorcontrib>Lee, Seung Hee</creatorcontrib><creatorcontrib>Lee, Gi-Dong</creatorcontrib><title>Time-Sequential Ultraviolet Exposure to Alignment Layers Embedded With Reactive Mesogen for High-Speed In-Plane Switching Liquid Crystal Cell</title><title>IEEE transactions on electron devices</title><addtitle>TED</addtitle><description>We propose a time-sequential ultraviolet (UV) exposure process that can improve the surface anchoring energy of photopolyimide (PI) embedded with reactive mesogen (RM) in high-speed liquid crystal (LC) display devices. To increase the anchoring energy of the PI layer, a separated UV exposure process of polymerization for the embedded RM material and PI layer is required [1]-[8]. In this paper, we propose a novel single-frequency UV exposure method that can perform the separated polymerization of the UV alignment layer and the embedded RM material by optimizing the intensity of the exposure UV light. Using the proposed UV exposure method, we polymerize the RM material during the first 4 s, and then accomplish the polymerization of the UV alignment layer sequentially. To demonstrate the electro-optical performance, we measure the surface anchoring energy and the optical response time of in-plane switching LC cell. The measured results show that the surface anchoring energy and the optical response time are improved by more than 2.5 times and 28.2%, respectively, compared with the conventional UV exposure.</description><subject>In-plane switching (IPS)</subject><subject>liquid crystal</subject><subject>Optical polarization</subject><subject>Optical polymers</subject><subject>Optical variables measurement</subject><subject>Polymerization</subject><subject>reactive mesogen (RM)</subject><subject>response time</subject><subject>surface anchoring energy</subject><subject>Surface treatment</subject><subject>Time factors</subject><subject>Time measurement</subject><subject>ultraviolet (UV) exposure</subject><subject>Ultraviolet radiation</subject><issn>0018-9383</issn><issn>1557-9646</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kF1PwjAUhhujiYjem3jTxOthv9Z1lwRRSDAagXi5lO0MSsYGbYfyI_zPlkC8OjnJ856PB6F7SnqUkvRpNnzuMUJlj0nKJBcXqEPjOIlSKeQl6hBCVZRyxa_RjXPr0EohWAf9zswGoinsWqi90RWeV97qvWkq8Hj4s21cawH7Bvcrs6w3AcITfQDr8HCzgKKAAn8Zv8KfoHNv9oDfwDVLqHHZWDwyy1U03UKAxnX0Ueka8PTb-Hxl6iWemF1rCjywB-fD4gFU1S26KnXl4O5cu2j-MpwNRtHk_XU86E-inEvqI5nETBHKVEEXsOAkkWWZFyUDIlMebtJcCEGVVukCOCkKWTKqckFEXIo4VcC76PE0d2ub8Lnz2bppbR1WZlRxKmJBUhUocqJy2zhnocy21my0PWSUZEfpWZCeHaVnZ-kh8nCKGAD4x5NYMS4Z_wMJf36S</recordid><startdate>201611</startdate><enddate>201611</enddate><creator>Mun, Byung-June</creator><creator>Park, Ki-Woong</creator><creator>Baek, Ji-Ho</creator><creator>Kim, Byeong Koo</creator><creator>Choi, Hyun Chul</creator><creator>Kim, Changwan</creator><creator>Kang, Bongsoon</creator><creator>Lee, Seung Hee</creator><creator>Lee, Gi-Dong</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-4402-1570</orcidid></search><sort><creationdate>201611</creationdate><title>Time-Sequential Ultraviolet Exposure to Alignment Layers Embedded With Reactive Mesogen for High-Speed In-Plane Switching Liquid Crystal Cell</title><author>Mun, Byung-June ; Park, Ki-Woong ; Baek, Ji-Ho ; Kim, Byeong Koo ; Choi, Hyun Chul ; Kim, Changwan ; Kang, Bongsoon ; Lee, Seung Hee ; Lee, Gi-Dong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c361t-675280128d1beb3076ffcdf2e0693ddea344418a89be30dd6f218c4045f4598e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>In-plane switching (IPS)</topic><topic>liquid crystal</topic><topic>Optical polarization</topic><topic>Optical polymers</topic><topic>Optical variables measurement</topic><topic>Polymerization</topic><topic>reactive mesogen (RM)</topic><topic>response time</topic><topic>surface anchoring energy</topic><topic>Surface treatment</topic><topic>Time factors</topic><topic>Time measurement</topic><topic>ultraviolet (UV) exposure</topic><topic>Ultraviolet radiation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mun, Byung-June</creatorcontrib><creatorcontrib>Park, Ki-Woong</creatorcontrib><creatorcontrib>Baek, Ji-Ho</creatorcontrib><creatorcontrib>Kim, Byeong Koo</creatorcontrib><creatorcontrib>Choi, Hyun Chul</creatorcontrib><creatorcontrib>Kim, Changwan</creatorcontrib><creatorcontrib>Kang, Bongsoon</creatorcontrib><creatorcontrib>Lee, Seung Hee</creatorcontrib><creatorcontrib>Lee, Gi-Dong</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on electron devices</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Mun, Byung-June</au><au>Park, Ki-Woong</au><au>Baek, Ji-Ho</au><au>Kim, Byeong Koo</au><au>Choi, Hyun Chul</au><au>Kim, Changwan</au><au>Kang, Bongsoon</au><au>Lee, Seung Hee</au><au>Lee, Gi-Dong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Time-Sequential Ultraviolet Exposure to Alignment Layers Embedded With Reactive Mesogen for High-Speed In-Plane Switching Liquid Crystal Cell</atitle><jtitle>IEEE transactions on electron devices</jtitle><stitle>TED</stitle><date>2016-11</date><risdate>2016</risdate><volume>63</volume><issue>11</issue><spage>4326</spage><epage>4330</epage><pages>4326-4330</pages><issn>0018-9383</issn><eissn>1557-9646</eissn><coden>IETDAI</coden><abstract>We propose a time-sequential ultraviolet (UV) exposure process that can improve the surface anchoring energy of photopolyimide (PI) embedded with reactive mesogen (RM) in high-speed liquid crystal (LC) display devices. To increase the anchoring energy of the PI layer, a separated UV exposure process of polymerization for the embedded RM material and PI layer is required [1]-[8]. In this paper, we propose a novel single-frequency UV exposure method that can perform the separated polymerization of the UV alignment layer and the embedded RM material by optimizing the intensity of the exposure UV light. Using the proposed UV exposure method, we polymerize the RM material during the first 4 s, and then accomplish the polymerization of the UV alignment layer sequentially. To demonstrate the electro-optical performance, we measure the surface anchoring energy and the optical response time of in-plane switching LC cell. The measured results show that the surface anchoring energy and the optical response time are improved by more than 2.5 times and 28.2%, respectively, compared with the conventional UV exposure.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TED.2016.2612634</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0002-4402-1570</orcidid></addata></record> |
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| subjects | In-plane switching (IPS) liquid crystal Optical polarization Optical polymers Optical variables measurement Polymerization reactive mesogen (RM) response time surface anchoring energy Surface treatment Time factors Time measurement ultraviolet (UV) exposure Ultraviolet radiation |
| title | Time-Sequential Ultraviolet Exposure to Alignment Layers Embedded With Reactive Mesogen for High-Speed In-Plane Switching Liquid Crystal Cell |
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