TOP > 外国特許検索 > Liquid crystal display device

Liquid crystal display device UPDATE

外国特許コード F110003544
整理番号 B58-01WO
掲載日 2011年6月29日
出願国 アメリカ合衆国
出願番号 59317005
公報番号 20080259254
公報番号 7576829
出願日 平成17年3月15日(2005.3.15)
公報発行日 平成20年10月23日(2008.10.23)
公報発行日 平成21年8月18日(2009.8.18)
国際出願番号 JP2005004481
国際公開番号 WO2005090520
国際出願日 平成17年3月15日(2005.3.15)
国際公開日 平成17年9月29日(2005.9.29)
優先権データ
  • 特願2004-079563 (2004.3.19) JP
  • 特願2004-192448 (2004.6.30) JP
  • 2005WO-JP04481 (2005.3.15) WO
発明の名称 (英語) Liquid crystal display device UPDATE
発明の概要(英語) (US7576829)
Presents a liquid crystal display device that does not require a surface orientation treatment, dramatically improves the response rate of dynamic image displays and does not experience light leaks when the display is black, which means to yield a dark field of vision.
The liquid crystal display device comprises polymer-stabilized blue phase liquid crystals sandwiched between a pair of clear substrates.
The liquid crystal display device obtained using polymer-stabilized blue phase liquid crystals exhibits large double refraction changes when an electrical field is applied in an in-plane direction to the cell substrates.
The polymer-stabilized blue phases liquid crystals comprises a low molecular weight liquid crystal that allows a blue phase to appear between cholesteric and isotropic phases and polymer network formed in the low molecular weight liquid crystals.
Furthermore, a liquid crystal display device that does not leak light when the display is black (yields a dark field of vision) can be obtained by optimizing the type and amount of a chiral dopant added to the liquid crystals.
特許請求の範囲(英語) [claim1]
1. A liquid crystal display device comprising a polymer-stabilized blue phase liquid crystal sandwiched between a pair of clear substrates, wherein the polymer-stabilized blue phase liquid crystal comprises a low molecular weight liquid crystal that allows a blue phase to appear between a cholesteric phase and an isotropic phase and a polymer network formed in the low molecular weight liquid crystal, and an electrical field is applied parallel to the substrates.
[claim2]
2. The liquid crystal display device of claim 1, wherein the polymer-stabilized blue phase liquid crystal contains a chiral dopant and the amount of the chiral dopant per the amount of the polymer-stabilized blue phase liquid crystal is adjusted so that the diffraction wavelength of the polymer-stabilized blue phase liquid crystal is outside visible zone (from 380 nm to 750 nm).
[claim3]
3. The liquid crystal display device of claim 1, wherein the electrical field is applied using two toothed comb shaped electrodes incorporated alternately in one of the clear substrate surfaces.
[claim4]
4. The liquid crystal display device of claim 1, wherein a TFT and a common electrode are incorporated in one of the substrate surfaces and the electrical field is applied between the TFT electrode and the common electrode in a form of an electrical field responding to the on-off input signals of the TFT.
[claim5]
5. A polymer-stabilized blue phase liquid crystal, which is constructed from a blue phase of a composite liquid crystal composition comprising a low molecular weight liquid crystal and a polymer network, wherein the low molecular weight liquid crystal allows a blue phase to appear between a cholesteric phase and an isotropic phase and a polymer network is formed by polymerizing non-liquid crystalline monomers along with a crosslinking agent, wherein the polymer-stabilized blue phase liquid crystal contains a chiral dopant and the amount of the chiral dopant per the amount of the polymer-stabilized blue phase liquid crystal is adjusted so that the diffraction wavelength of the polymer-stabilized blue phase liquid crystal is outside visible zone (from 380 nm to 750 nm).
[claim6]
6. A liquid crystal display device comprising a polymer-stabilized blue phase liquid crystal of claim 5 sandwiched between a pair of clear substrates, wherein an electrical field is applied parallel to the substrates.
[claim7]
7. The liquid crystal display device of claim 6, wherein the electrical field is applied using two toothed comb shaped electrodes incorporated alternately in one of the clear substrate surfaces.
[claim8]
8. The liquid crystal display device of claim 6, wherein a TFT and a common electrode are incorporated in one of the substrate surfaces and the electrical field is applied between the TFT electrode and the common electrode in a form of an electrical field responding to the on-off input signals of the TFT.
[claim9]
9. The liquid crystal display device of claim 7, wherein a TFT and a common electrode are incorporated in one of the substrate surfaces and the electrical field is applied between the TFT electrode and the common electrode in a form of an electrical field responding to the on-off input signals of the TFT.
[claim10]
10. The liquid crystal display device of claim 2, wherein the electrical field is applied using two toothed comb shaped electrodes incorporated alternately in one of the clear substrate surfaces.
[claim11]
11. The liquid crystal display device of claim 2, wherein a TFT and a common electrode are incorporated in one of the substrate surfaces and the electrical field is applied between the TFT electrode and the common electrode in a form of an electrical field responding to the on-off input signals of the TFT.
  • 発明者/出願人(英語)
  • KIKUCHI HIROTSUGU
  • KAJIYAMA TISATO
  • NAGAMURA TOSHIHIKO
  • HISAKADO YOSHIAKI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • C09K019/02
  • C09K019/02J
  • C09K019/54A3
  • C09K019/58B
  • G02F001/137C
  • M09K019/54A5
  • S02F001/1343A8
  • S02F001/137P
  • S02F001/137U
参考情報 (研究プロジェクト等) SORST Selected in Fiscal 2003
ライセンスをご希望の方、特許の内容に興味を持たれた方は、問合せボタンを押してください。

PAGE TOP

close
close
close
close
close
close