Liquid crystal display device
外国特許コード | F110003544 |
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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 |
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発明の名称 (英語) | Liquid crystal display device |
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. |
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国際特許分類(IPC) |
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参考情報 (研究プロジェクト等) | SORST Selected in Fiscal 2003 |
日本語項目の表示
発明の名称 | 液晶表示素子 |
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