Amorphous IGZO TFT-Based Pixel Buffer to Suppress Blue-Phase Liquid Crystal High-Frequency Effect
This letter discusses the frequency effect of polymer-stabilized blue-phase liquid crystal (BPLC) on the data voltages of a conventional pixel circuit and develops a new pixel buffer that exploits amorphous indium-gallium-zinc-oxidethin-film transistors (TFTs). During high-speed operations, BPLC ser...
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| Veröffentlicht in: | IEEE electron device letters 2017-12, Vol.38 (12), p.1673-1675 |
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| container_title | IEEE electron device letters |
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| creator | Lin, Chih-Lung Chen, Po-Syun Lai, Po-Cheng Hsu, Chih-Cheng Chang, Jui-Hung |
| description | This letter discusses the frequency effect of polymer-stabilized blue-phase liquid crystal (BPLC) on the data voltages of a conventional pixel circuit and develops a new pixel buffer that exploits amorphous indium-gallium-zinc-oxidethin-film transistors (TFTs). During high-speed operations, BPLC seriously distorts data voltages because of the highly frequency-dependent-dielectric anisotropy. To lessen the frequency-dependent effect of BPLC, a source-follower structure is integrated into the proposed pixel buffer to prolong the charging time of the BPLC cell. The experimental results show that the source-follower yields linear output characteristics. Further compensation for TFT VTH shifts and suppressing the leakage current are confirmed to make the data voltages on the BPLC cell highly uniform and stable. |
| doi_str_mv | 10.1109/LED.2017.2763610 |
| format | Article |
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During high-speed operations, BPLC seriously distorts data voltages because of the highly frequency-dependent-dielectric anisotropy. To lessen the frequency-dependent effect of BPLC, a source-follower structure is integrated into the proposed pixel buffer to prolong the charging time of the BPLC cell. The experimental results show that the source-follower yields linear output characteristics. Further compensation for TFT VTH shifts and suppressing the leakage current are confirmed to make the data voltages on the BPLC cell highly uniform and stable.</description><identifier>ISSN: 0741-3106</identifier><identifier>EISSN: 1558-0563</identifier><identifier>DOI: 10.1109/LED.2017.2763610</identifier><identifier>CODEN: EDLEDZ</identifier><language>eng</language><publisher>IEEE</publisher><subject>Amorphous indium-gallium-zinc-oxide (a-IGZO) ; Distortion ; high frequency effect ; Liquid crystal displays ; pixel buffer ; Polymers ; polymerstabilized blue-phase liquid crystal (PS-BPLC) ; Thin film transistors ; Threshold voltage ; Time-frequency analysis ; Voltage measurement</subject><ispartof>IEEE electron device letters, 2017-12, Vol.38 (12), p.1673-1675</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c263t-638a1eb14e6a1e343075e6e64f6c257868751485e58e001ff8e9ff8f26e8413d3</citedby><cites>FETCH-LOGICAL-c263t-638a1eb14e6a1e343075e6e64f6c257868751485e58e001ff8e9ff8f26e8413d3</cites><orcidid>0000-0002-4124-4226 ; 0000-0002-4948-8591</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8070321$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,776,780,792,27903,27904,54737</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/8070321$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Lin, Chih-Lung</creatorcontrib><creatorcontrib>Chen, Po-Syun</creatorcontrib><creatorcontrib>Lai, Po-Cheng</creatorcontrib><creatorcontrib>Hsu, Chih-Cheng</creatorcontrib><creatorcontrib>Chang, Jui-Hung</creatorcontrib><title>Amorphous IGZO TFT-Based Pixel Buffer to Suppress Blue-Phase Liquid Crystal High-Frequency Effect</title><title>IEEE electron device letters</title><addtitle>LED</addtitle><description>This letter discusses the frequency effect of polymer-stabilized blue-phase liquid crystal (BPLC) on the data voltages of a conventional pixel circuit and develops a new pixel buffer that exploits amorphous indium-gallium-zinc-oxidethin-film transistors (TFTs). During high-speed operations, BPLC seriously distorts data voltages because of the highly frequency-dependent-dielectric anisotropy. To lessen the frequency-dependent effect of BPLC, a source-follower structure is integrated into the proposed pixel buffer to prolong the charging time of the BPLC cell. The experimental results show that the source-follower yields linear output characteristics. Further compensation for TFT VTH shifts and suppressing the leakage current are confirmed to make the data voltages on the BPLC cell highly uniform and stable.</description><subject>Amorphous indium-gallium-zinc-oxide (a-IGZO)</subject><subject>Distortion</subject><subject>high frequency effect</subject><subject>Liquid crystal displays</subject><subject>pixel buffer</subject><subject>Polymers</subject><subject>polymerstabilized blue-phase liquid crystal (PS-BPLC)</subject><subject>Thin film transistors</subject><subject>Threshold voltage</subject><subject>Time-frequency analysis</subject><subject>Voltage measurement</subject><issn>0741-3106</issn><issn>1558-0563</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kEtrwkAUhYfSQq3tvtDN_IGxczNPl2p9QUChdtNNSOOdmhKbOJOA_vuOKN3csznf4fIR8gx8AMCHr-n0bZBwMIPEaKGB35AeKGUZV1rckh43EpgAru_JQwg_nIOURvZIPtrXvtnVXaDL-eeKbmYbNs4Dbum6PGJFx51z6Glb0_euaTyGQMdVh2y9iyWaloeu3NKJP4U2r-ii_N6xmcdDh7_FiU4jWrSP5M7lVcCna_bJx2y6mSxYupovJ6OUFYkWLdPC5oBfIFHHFFJwo1Cjlk4XiTJWW6NAWoXKYvzeOYvDeFyi0UoQW9En_LJb-DoEjy5rfLnP_SkDnp0VZVFRdlaUXRVF5OWClIj4X7fccJGA-AP7u2EO</recordid><startdate>201712</startdate><enddate>201712</enddate><creator>Lin, Chih-Lung</creator><creator>Chen, Po-Syun</creator><creator>Lai, Po-Cheng</creator><creator>Hsu, Chih-Cheng</creator><creator>Chang, Jui-Hung</creator><general>IEEE</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-4124-4226</orcidid><orcidid>https://orcid.org/0000-0002-4948-8591</orcidid></search><sort><creationdate>201712</creationdate><title>Amorphous IGZO TFT-Based Pixel Buffer to Suppress Blue-Phase Liquid Crystal High-Frequency Effect</title><author>Lin, Chih-Lung ; Chen, Po-Syun ; Lai, Po-Cheng ; Hsu, Chih-Cheng ; Chang, Jui-Hung</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c263t-638a1eb14e6a1e343075e6e64f6c257868751485e58e001ff8e9ff8f26e8413d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Amorphous indium-gallium-zinc-oxide (a-IGZO)</topic><topic>Distortion</topic><topic>high frequency effect</topic><topic>Liquid crystal displays</topic><topic>pixel buffer</topic><topic>Polymers</topic><topic>polymerstabilized blue-phase liquid crystal (PS-BPLC)</topic><topic>Thin film transistors</topic><topic>Threshold voltage</topic><topic>Time-frequency analysis</topic><topic>Voltage measurement</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lin, Chih-Lung</creatorcontrib><creatorcontrib>Chen, Po-Syun</creatorcontrib><creatorcontrib>Lai, Po-Cheng</creatorcontrib><creatorcontrib>Hsu, Chih-Cheng</creatorcontrib><creatorcontrib>Chang, Jui-Hung</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><jtitle>IEEE electron device letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Lin, Chih-Lung</au><au>Chen, Po-Syun</au><au>Lai, Po-Cheng</au><au>Hsu, Chih-Cheng</au><au>Chang, Jui-Hung</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Amorphous IGZO TFT-Based Pixel Buffer to Suppress Blue-Phase Liquid Crystal High-Frequency Effect</atitle><jtitle>IEEE electron device letters</jtitle><stitle>LED</stitle><date>2017-12</date><risdate>2017</risdate><volume>38</volume><issue>12</issue><spage>1673</spage><epage>1675</epage><pages>1673-1675</pages><issn>0741-3106</issn><eissn>1558-0563</eissn><coden>EDLEDZ</coden><abstract>This letter discusses the frequency effect of polymer-stabilized blue-phase liquid crystal (BPLC) on the data voltages of a conventional pixel circuit and develops a new pixel buffer that exploits amorphous indium-gallium-zinc-oxidethin-film transistors (TFTs). During high-speed operations, BPLC seriously distorts data voltages because of the highly frequency-dependent-dielectric anisotropy. To lessen the frequency-dependent effect of BPLC, a source-follower structure is integrated into the proposed pixel buffer to prolong the charging time of the BPLC cell. The experimental results show that the source-follower yields linear output characteristics. Further compensation for TFT VTH shifts and suppressing the leakage current are confirmed to make the data voltages on the BPLC cell highly uniform and stable.</abstract><pub>IEEE</pub><doi>10.1109/LED.2017.2763610</doi><tpages>3</tpages><orcidid>https://orcid.org/0000-0002-4124-4226</orcidid><orcidid>https://orcid.org/0000-0002-4948-8591</orcidid></addata></record> |
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| subjects | Amorphous indium-gallium-zinc-oxide (a-IGZO) Distortion high frequency effect Liquid crystal displays pixel buffer Polymers polymerstabilized blue-phase liquid crystal (PS-BPLC) Thin film transistors Threshold voltage Time-frequency analysis Voltage measurement |
| title | Amorphous IGZO TFT-Based Pixel Buffer to Suppress Blue-Phase Liquid Crystal High-Frequency Effect |
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