JP2015187212A - Liquid crystal composition and liquid crystal display device containing the same - Google Patents
Liquid crystal composition and liquid crystal display device containing the same Download PDFInfo
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本発明は、液晶組成物及びこれを含む液晶表示装置に関するものであって、より詳しくは、強誘電性液晶組成物及びこれを含む液晶表示装置に関する。 The present invention relates to a liquid crystal composition and a liquid crystal display device including the same, and more particularly to a ferroelectric liquid crystal composition and a liquid crystal display device including the same.
一般に、液晶表示装置は液晶の電気光学効果を利用する。前記液晶表示装置は、一対の基板及び前記一対の基板の間に配置された液晶を有する。前記一対の基板の外面には偏光板が付設されている。 In general, a liquid crystal display device uses the electro-optic effect of liquid crystal. The liquid crystal display device includes a pair of substrates and a liquid crystal disposed between the pair of substrates. A polarizing plate is attached to the outer surfaces of the pair of substrates.
前記液晶表示装置は、液晶の種類及び液晶層の配向方法などにより、ツイステッドネマチックモード、水平電極スイッチングモード、垂直配向モード、強誘電性モードなどに分類される。 The liquid crystal display device is classified into a twisted nematic mode, a horizontal electrode switching mode, a vertical alignment mode, a ferroelectric mode, and the like according to the type of liquid crystal and the alignment method of the liquid crystal layer.
強誘電性モードの液晶表示装置は、強誘電性液晶を含む。強誘電性液晶は、分極モーメント及び電場の極性相互作用により応答時間が数十μｓから数百μｓ程度と極めて短い。 The ferroelectric mode liquid crystal display device includes a ferroelectric liquid crystal. The ferroelectric liquid crystal has a very short response time of about several tens to several hundreds of μs due to the polarization moment and the polar interaction of the electric field.
しかしながら、一般的な強誘電性液晶はコーン角が小さいため、透過率が低い。透過率を高めるためには、液晶表示装置のセルギャップを増加させなければならないが、セルギャップが増加するほど、応答時間は長くなり、駆動電圧が大きくなる（特許文献１参照）。 However, a general ferroelectric liquid crystal has a low cone angle and thus has a low transmittance. In order to increase the transmittance, the cell gap of the liquid crystal display device must be increased. However, as the cell gap increases, the response time becomes longer and the drive voltage becomes larger (see Patent Document 1).
本発明は、螺旋ピッチが短くかつコーン角が大きい強誘電性液晶組成物を提供することを目的とする。 An object of the present invention is to provide a ferroelectric liquid crystal composition having a short helical pitch and a large cone angle.
また、本発明は、透過率が高く、応答速度が速く、消費電力が低い液晶表示装置を提供することを他の目的とする。 Another object of the present invention is to provide a liquid crystal display device with high transmittance, high response speed, and low power consumption.
本発明の一実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物２０〜３０重量部と、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物１５〜２５重量部とを含む。ここで、Ｒ１及びＲ２は、それぞれ炭素数が５〜１０であるアルキル基である。 The liquid crystal composition according to an embodiment of the present invention is represented by 20 to 30 parts by weight of at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 1, and represented by the following chemical formula 2. And 15 to 25 parts by weight of at least one second liquid crystal compound selected from the group consisting of: Here, R1 and R2 are each an alkyl group having 5 to 10 carbon atoms.
本発明の他の実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物２０〜３０重量部と、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物３０〜４０重量部と、下記化学式３で表される第３の液晶化合物３５〜４５重量部とを含む。ここで、Ｒ１、Ｒ２及びＲ３は、それぞれ炭素数が５〜１０であるアルキル基である。 A liquid crystal composition according to another embodiment of the present invention is represented by 20 to 30 parts by weight of at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 1, and represented by the following chemical formula 2. 30 to 40 parts by weight of at least one second liquid crystal compound selected from the group consisting of the above compounds and 35 to 45 parts by weight of a third liquid crystal compound represented by the following chemical formula 3. Here, R1, R2, and R3 are each an alkyl group having 5 to 10 carbon atoms.
本発明のさらに他の実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物３０〜４０重量部と、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物５〜１５重量部と、下記化学式３で表される化合物からなる群より選択される少なくとも１種の第３の液晶化合物２０〜３０重量部と、下記化学式４で表される第４の液晶化合物２５〜３５重量部とを含む。ここで、Ｒ１、Ｒ２、Ｒ３、Ｒ４、Ｒ５及びＲ６は、それぞれ炭素数が５〜１０であるアルキル基である。 A liquid crystal composition according to still another embodiment of the present invention includes 30 to 40 parts by weight of at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 1, 5 to 15 parts by weight of at least one second liquid crystal compound selected from the group consisting of the compounds represented, and at least one third liquid crystal selected from the group consisting of compounds represented by the following chemical formula 3 20-30 weight part of compounds and 25-35 weight part of 4th liquid crystal compounds represented by following Chemical formula 4. Here, R1, R2, R3, R4, R5 and R6 are each an alkyl group having 5 to 10 carbon atoms.
本発明のさらに他の実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物２０〜３０重量部と、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物１５〜２０重量部と、下記化学式３で表される化合物からなる群より選択される少なくとも１種の第３の液晶化合物２０〜３０重量部と、下記化学式４で表される第４の液晶化合物２５〜３５重量部とを含む。ここで、Ｒ１、Ｒ２、Ｒ３及びＲ４は、それぞれ炭素数が５〜１０であるアルキル基である。 A liquid crystal composition according to still another embodiment of the present invention includes at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 1, 20 to 30 parts by weight, and the following chemical formula 2: 15 to 20 parts by weight of at least one second liquid crystal compound selected from the group consisting of the compounds represented, and at least one third liquid crystal selected from the group consisting of compounds represented by the following chemical formula 3 20-30 weight part of compounds and 25-35 weight part of 4th liquid crystal compounds represented by following Chemical formula 4. Here, R1, R2, R3, and R4 are each an alkyl group having 5 to 10 carbon atoms.
本発明の一実施形態に係る液晶表示装置は、第１の基板、前記第１の基板と相対する第２の基板、第１の電極、第２の電極、及び前記第１の基板と前記第２の基板との間に配置される液晶層を有する。前記第１の電極及び第２の電極は、前記第２の基板上に離隔して設けられる。前記第１の電極は第１の駆動電圧を受け、前記第２の電極は前記第１の駆動電圧と異なる第２の駆動電圧が印加される。前記液晶層は、上述した本発明の実施形態に係る液晶組成物のいずれか１種を含む。 A liquid crystal display device according to an embodiment of the present invention includes a first substrate, a second substrate opposed to the first substrate, a first electrode, a second electrode, and the first substrate and the first substrate. A liquid crystal layer disposed between the two substrates. The first electrode and the second electrode are provided separately on the second substrate. The first electrode receives a first drive voltage, and the second electrode is applied with a second drive voltage different from the first drive voltage. The liquid crystal layer includes any one of the liquid crystal compositions according to the above-described embodiments of the present invention.
前記液晶組成物は、短い螺旋ピッチを有し、かつ大きなコーン角を有する。それにより、前記液晶組成物を含む液晶表示装置はブラックを表示しやすく、透過率が高い。また、前記液晶表示装置においてはセルギャップが小さいため、消費電力が低減され、応答速度が速い。 The liquid crystal composition has a short helical pitch and a large cone angle. Accordingly, the liquid crystal display device including the liquid crystal composition easily displays black and has high transmittance. In the liquid crystal display device, since the cell gap is small, the power consumption is reduced and the response speed is fast.
以下、添付した図面を参照して、本発明の好適な実施形態を詳細に説明する。 Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
図１は、本発明の一実施形態に係る液晶表示装置の断面図である。図２Ａ及び図２Ｂは、駆動電圧に応じて変化する液晶の方向を示す断面図である。 FIG. 1 is a cross-sectional view of a liquid crystal display device according to an embodiment of the present invention. 2A and 2B are cross-sectional views showing the direction of the liquid crystal that changes according to the driving voltage.
図１に示すように、本実施形態に係る液晶表示装置は、互いに相対する第１の表示基板１００及び第２の表示基板２００、並びに前記第１の表示基板１００と前記第２の表示基板２００との間に設けられた液晶層３００を有する。 As shown in FIG. 1, the liquid crystal display device according to the present embodiment includes a first display substrate 100 and a second display substrate 200 that face each other, and the first display substrate 100 and the second display substrate 200. The liquid crystal layer 300 is provided between the two.
前記第１の表示基板１００は、第１のベース基板１１０上に設けられた第１の電極１２０と、前記第１の電極１２０と離隔して設けられた第２の電極１３０とを備える。図示していないが、前記第１のベース基板１１０上には複数の薄膜層が備えられる。 The first display substrate 100 includes a first electrode 120 provided on the first base substrate 110 and a second electrode 130 provided separately from the first electrode 120. Although not shown, a plurality of thin film layers are provided on the first base substrate 110.
前記第１の電極１２０及び前記第２の電極１３０には互いに異なるレベルの駆動電圧がそれぞれ印加され、それにより、前記第１の電極１２０と前記第２の電極１３０との間に水平電界が形成される。前記第１の電極１２０及び前記第２の電極１３０に印加される前記駆動電圧のレベルの変化に伴い、前記水平電界の方向が変化する。 Different driving voltages are applied to the first electrode 120 and the second electrode 130, respectively, thereby forming a horizontal electric field between the first electrode 120 and the second electrode 130. Is done. As the driving voltage applied to the first electrode 120 and the second electrode 130 changes, the direction of the horizontal electric field changes.
図示していないが、前記第１の表示基板１００はまた、平面上に複数の画素を備えることができる。前記複数の画素は、それぞれ前記第１の電極１２０及び前記第２の電極１３０を備える。前記複数の画素は、それぞれ前記第１の電極１２０及び前記第２の電極１３０に前記駆動電圧をスイッチングする薄膜トランジスタを備える。 Although not shown, the first display substrate 100 may also include a plurality of pixels on a plane. Each of the plurality of pixels includes the first electrode 120 and the second electrode 130. Each of the plurality of pixels includes a thin film transistor that switches the driving voltage to the first electrode 120 and the second electrode 130.
図示していないが、前記第２の表示基板２００は、前記画素に対応するカラーフィルタを備えることができる。また、前記第１の表示基板１００及び前記第２の表示基板２００は配向膜をそれぞれ備えることができる。 Although not shown, the second display substrate 200 may include a color filter corresponding to the pixel. In addition, the first display substrate 100 and the second display substrate 200 may each include an alignment film.
前記液晶層３００は強誘電性を有する液晶を含む。図１に示すように、前記強誘電性液晶は垂直配向することができる。前記強誘電性液晶は螺旋構造を形成している。一つの螺旋ピッチを形成する強誘電性液晶は層から層へ移動していくにつれて、円錐面上に沿って連続して回転する。 The liquid crystal layer 300 includes a liquid crystal having ferroelectricity. As shown in FIG. 1, the ferroelectric liquid crystal can be vertically aligned. The ferroelectric liquid crystal has a spiral structure. As the ferroelectric liquid crystal forming one spiral pitch moves from layer to layer, it rotates continuously along the conical surface.
図２Ａ及び図２Ｂに示すように、電界が形成されると、前記強誘電性液晶はそれぞれの分極モーメントと電場との間の極性相互作用により螺旋構造が解ける。それにより、前記液晶層３００に入射した光は散乱し、前記液晶層３００を透過する。 As shown in FIG. 2A and FIG. 2B, when an electric field is formed, the ferroelectric liquid crystal can be unscrewed by a polar interaction between the polarization moment and the electric field. As a result, light incident on the liquid crystal layer 300 is scattered and transmitted through the liquid crystal layer 300.
図２Ａに示すように、第１の方向（Ｅ１）に電界が生じると、前記強誘電性液晶は螺旋の中心軸に対して所定の角度で傾斜する。一つの螺旋ピッチを形成する強誘電性液晶は同一方向に整列する。 As shown in FIG. 2A, when an electric field is generated in the first direction (E1), the ferroelectric liquid crystal is inclined at a predetermined angle with respect to the central axis of the spiral. Ferroelectric liquid crystals forming one spiral pitch are aligned in the same direction.
図２Ｂに示すように、前記第１の方向（Ｅ１）とは逆の第２の方向（Ｅ２）に電界が生じると、前記強誘電性液晶の自発分極の向きが変化する。それにより、前記強誘電性液晶は螺旋の中心軸に対して図２Ａに示す強誘電性液晶とは対称の角度で傾斜する。 As shown in FIG. 2B, when an electric field is generated in a second direction (E2) opposite to the first direction (E1), the direction of spontaneous polarization of the ferroelectric liquid crystal changes. As a result, the ferroelectric liquid crystal is tilted at an angle symmetrical to the ferroelectric liquid crystal shown in FIG. 2A with respect to the central axis of the spiral.
換言すると、図２Ａに示す強誘電性液晶の配向子が螺旋の中心軸に対して＋αの角度をなすとすると、図２Ｂに示す強誘電性液晶の配向子は、前記螺旋構造の中心軸に対して−αの角度をなす。 In other words, if the orientation of the ferroelectric liquid crystal shown in FIG. 2A forms an angle of + α with respect to the central axis of the spiral, the orientation of the ferroelectric liquid crystal shown in FIG. An angle of -α is made to the angle.
図３は、本発明の他の実施形態に係る液晶表示装置の断面図であり、図４Ａ及び図４Ｂは、駆動電圧に応じて変化する液晶の配列を示す断面図である。 FIG. 3 is a cross-sectional view of a liquid crystal display device according to another embodiment of the present invention, and FIGS. 4A and 4B are cross-sectional views showing the arrangement of liquid crystals that change according to the driving voltage.
図３、図４Ａ及び図４Ｂに示す液晶表示装置においては、図１、図２Ａ及び図２Ｂに示す液晶表示装置と前記強誘電性液晶の配向方向が異なる。図３、図４Ａ及び図４Ｂに示す前記強誘電性液晶は、前記第１の表示基板１００及び前記第２の表示基板２００に対して水平方向に配向される。 In the liquid crystal display device shown in FIGS. 3, 4A and 4B, the alignment direction of the ferroelectric liquid crystal is different from that of the liquid crystal display device shown in FIGS. 1, 2A and 2B. The ferroelectric liquid crystal shown in FIGS. 3, 4A, and 4B is aligned in the horizontal direction with respect to the first display substrate 100 and the second display substrate 200. FIG.
本実施形態に係る液晶表示装置は、前記強誘電性液晶の配向方向が異なる点を除き、図１、図２Ａ及び図２Ｂに示す液晶表示装置と同様である。 The liquid crystal display device according to this embodiment is the same as the liquid crystal display device shown in FIGS. 1, 2A, and 2B except that the orientation direction of the ferroelectric liquid crystal is different.
一方で、図３に示す液晶表示装置は、前記第１の表示基板１００及び前記第２の表示基板２００の外面に付設される一対の偏光板の透過軸、並びに図４Ａ及び図４Ｂに示す前記強誘電性液晶の配向子の配置を調節して入射される光をスイッチングすることができる。 On the other hand, the liquid crystal display device illustrated in FIG. 3 includes a transmission axis of a pair of polarizing plates attached to the outer surfaces of the first display substrate 100 and the second display substrate 200, and the above-described liquid crystal display device illustrated in FIGS. 4A and 4B. Incident light can be switched by adjusting the arrangement of the directors of the ferroelectric liquid crystal.
図５は、強誘電性液晶のコーン角を示す図である。電界が生じるのにしたがって、前記強誘電性液晶はコーン角（θ）をなし、配向子の方向が変化する。図２Ａ及び図２Ｂに示す強誘電性液晶、並びに図４Ａ及び図４Ｂに示す強誘電性液晶は、図５に示す前記強誘電性液晶のコーン角（θ）を有する。 FIG. 5 is a diagram showing the cone angle of the ferroelectric liquid crystal. As the electric field is generated, the ferroelectric liquid crystal has a cone angle (θ) and the direction of the director changes. The ferroelectric liquid crystal shown in FIGS. 2A and 2B and the ferroelectric liquid crystal shown in FIGS. 4A and 4B have the cone angle (θ) of the ferroelectric liquid crystal shown in FIG.
実際、図１及び図３に示す液晶表示装置の透過率は、図５に示すコーン角（θ）によって決定される。コーン角（θ）が小さいと透過率が低いため、透過率を高めるためには、セルギャップ（前記第１の表示基板１００と前記第２の表示基板２００との間の距離）を増加させなければならない。しかしながら、前記セルギャップが増加されると、反応速度が遅くなる。前記速い反応速度を得るためには、さらに大きい駆動電圧が必要となり、これにより消費電力が増加する。 Actually, the transmittance of the liquid crystal display device shown in FIGS. 1 and 3 is determined by the cone angle (θ) shown in FIG. Since the transmittance is low when the cone angle (θ) is small, the cell gap (the distance between the first display substrate 100 and the second display substrate 200) must be increased in order to increase the transmittance. I must. However, when the cell gap is increased, the reaction rate becomes slower. In order to obtain the fast reaction speed, a larger driving voltage is required, thereby increasing power consumption.
一般的な強誘電性液晶組成物は螺旋ピッチが１０μｍ以上である。そのため、一般的な表示装置が完全なブラックを表示するには制限がある。また、前記液晶の前記コーン角が５０°以下であるため、透過率が低い。 A general ferroelectric liquid crystal composition has a helical pitch of 10 μm or more. Therefore, there is a limitation for a general display device to display complete black. Moreover, since the cone angle of the liquid crystal is 50 ° or less, the transmittance is low.
本発明に係る液晶表示装置は、以下において説明する液晶組成物を含む。以下において説明する液晶組成物は、螺旋ピッチが１μｍ以下であり、一般的な強誘電性液晶と比較して螺旋ピッチが短い。また、一般的な強誘電性液晶組成物と比較してコーン角が大きい。 The liquid crystal display device according to the present invention includes a liquid crystal composition described below. The liquid crystal composition described below has a helical pitch of 1 μm or less, and the helical pitch is shorter than that of a general ferroelectric liquid crystal. Further, the cone angle is larger than that of a general ferroelectric liquid crystal composition.
（本発明の一実施形態に係る液晶組成物）
本実施形態に係る液晶組成物は２種以上の液晶化合物を含む。前記２種以上の液晶化合物中の少なくとも１種の液晶化合物はキラル成分を含む。
(Liquid crystal composition according to one embodiment of the present invention)
The liquid crystal composition according to this embodiment contains two or more liquid crystal compounds. At least one liquid crystal compound in the two or more liquid crystal compounds includes a chiral component.
本実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物を含み、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物を含む。 The liquid crystal composition according to this embodiment includes at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 1, and is selected from the group consisting of compounds represented by the following chemical formula 2 And at least one second liquid crystal compound.
前記第１の液晶化合物２０〜３０重量部に対して、前記第２の液晶化合物は、１５〜２５重量部含まれる。前記化学式１及び前記化学式２において、前記Ｒ１及び前記Ｒ２は、それぞれ炭素数が５〜１０であるアルキル基である。 The second liquid crystal compound is contained in 15 to 25 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound. In the chemical formula 1 and the chemical formula 2, the R1 and the R2 are each an alkyl group having 5 to 10 carbon atoms.
前記第２の液晶化合物はキラル成分を含む。本実施形態において、前記第１の液晶化合物に対する前記第２の液晶化合物の重量部が相対的に高いので、前記液晶組成物は大きいカイラリティを有する。そのため、前記液晶組成物の螺旋ピッチが短い。 The second liquid crystal compound includes a chiral component. In this embodiment, since the weight part of the second liquid crystal compound is relatively high with respect to the first liquid crystal compound, the liquid crystal composition has a large chirality. Therefore, the helical pitch of the liquid crystal composition is short.
本実施形態に係る液晶組成物は、相変化においてブルー相を有し、スメクチックＡ相（ＳｍＡ ｐｈａｓｅ）を有しない。 The liquid crystal composition according to the present embodiment has a blue phase in phase change and does not have a smectic A phase (SmA phase).
また、本実施形態に係る液晶組成物は、下記化学式３で表される化合物からなる群より選択される少なくとも１種の第３の液晶化合物をさらに含むことができる。 In addition, the liquid crystal composition according to this embodiment can further include at least one third liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 3.
前記第３の液晶化合物は、前記第１の液晶化合物２０〜３０重量部に対して、２０〜３０重量部含まれることができる。ここで、Ｒ３、Ｒ４は、それぞれ炭素数が５〜１０であるアルキル基である。 The third liquid crystal compound may be included in an amount of 20 to 30 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound. Here, R3 and R4 are each an alkyl group having 5 to 10 carbon atoms.
また、本実施形態に係る液晶組成物は、前記第３の液晶化合物の代わりに下記化学式４で表される化合物からなる群より選択される少なくとも１種の第４の液晶化合物を含むことができる。 In addition, the liquid crystal composition according to this embodiment may include at least one fourth liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 4 instead of the third liquid crystal compound. .
前記第４の液晶化合物は、前記第１の液晶化合物２０〜３０重量部に対して、２０〜３０重量部含まれることができる。ここで、Ｒ５は、炭素数が５〜１０であるアルキル基である。 The fourth liquid crystal compound may be included in an amount of 20 to 30 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound. Here, R5 is an alkyl group having 5 to 10 carbon atoms.
本発明の一実施形態に係る液晶組成物は、上述した液晶化合物のほかに、所定の重量部のキラル成分を有する液晶化合物をさらに含むことができる。また、前記液晶組成物は、反応性メソゲン及び光開始剤をさらに含むことができる。これに関する具体的な内容は、以下の実験例によりさらに詳しく説明する。 The liquid crystal composition according to an embodiment of the present invention may further include a liquid crystal compound having a predetermined weight part of a chiral component in addition to the liquid crystal compound described above. The liquid crystal composition may further include a reactive mesogen and a photoinitiator. The specific contents regarding this will be described in more detail by the following experimental examples.
（実験例１）
本実験例において、前記液晶組成物は、前記第１の液晶化合物２５重量％、前記第２の液晶化合物２０重量％、及び前記第３の液晶化合物２５重量％を含む。
(Experimental example 1)
In this experimental example, the liquid crystal composition includes 25% by weight of the first liquid crystal compound, 20% by weight of the second liquid crystal compound, and 25% by weight of the third liquid crystal compound.
また、本実験例において、前記液晶組成物は、下記化学式５で表される第５の液晶化合物を３０重量％含む。下記第５の液晶化合物は、キラル成分を有する。 In this experimental example, the liquid crystal composition contains 30% by weight of a fifth liquid crystal compound represented by the following chemical formula 5. The following fifth liquid crystal compound has a chiral component.
図６は、本実験例に係る液晶組成物の相変化を示している。本実験例に係る液晶組成物はブルー相を有し、スメクチックＡ相を有しない。 FIG. 6 shows the phase change of the liquid crystal composition according to this experimental example. The liquid crystal composition according to this experimental example has a blue phase and does not have a smectic A phase.
図６に示すように、前記液晶組成物は９０℃で等方相を有し、７７℃でブルー相を有し、６４.７℃でキラルスメクチック相を有する。実質的に、等方相−ネマチック相の転移温度は８４℃〜７４.５℃である。また、ネマチック相−キラルスメクチック相の転移温度は６６.７℃〜６５.８℃である。上述したように、前記液晶組成物の相変化過程においてスメクチックＡ相を有しない。 As shown in FIG. 6, the liquid crystal composition has an isotropic phase at 90 ° C., a blue phase at 77 ° C., and a chiral smectic phase at 64.7 ° C. The transition temperature of the isotropic phase-nematic phase is substantially 84 ° C to 74.5 ° C. The transition temperature of the nematic phase to the chiral smectic phase is 66.7 ° C to 65.8 ° C. As described above, the liquid crystal composition does not have a smectic A phase in the phase change process.
前記液晶組成物のコーン角は７３°であり、分極モーメントは２９７ｎＣ／ｃｍ２である。 The liquid crystal composition has a cone angle of 73 ° and a polarization moment of 297 nC / cm 2 .
他の実験例において、前記第５の液晶化合物は、前記第１の液晶化合物２０〜３０重量部に対して、２５〜３５重量部含まれていてもよい。 In another experimental example, the fifth liquid crystal compound may be included in an amount of 25 to 35 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound.
（実験例２）
本実験例において、前記液晶組成物は、前記第１の液晶化合物２５.５重量％、前記第２の液晶化合物２０重量％、前記第４の液晶化合物２５.５重量％、及び前記第５の液晶化合物２９重量％を含む。
(Experimental example 2)
In this experimental example, the liquid crystal composition includes 25.5% by weight of the first liquid crystal compound, 20% by weight of the second liquid crystal compound, 25.5% by weight of the fourth liquid crystal compound, and the fifth liquid crystal compound. 29% by weight of liquid crystal compound is contained.
前記液晶組成物は、等方相−ネマチック相の転移温度が７４℃であり、ネマチック相−キラルスメクチック相の転移温度が６０℃である。前記液晶組成物の相変化過程において、スメクチックＡ（ＳｍＡ）相を有しない。また、前記液晶組成物は６９℃でブルー相を有する。 The liquid crystal composition has an isotropic phase-nematic phase transition temperature of 74 ° C. and a nematic phase-chiral smectic phase transition temperature of 60 ° C. In the phase change process of the liquid crystal composition, it does not have a smectic A (SmA) phase. The liquid crystal composition has a blue phase at 69 ° C.
前記液晶組成物のコーン角は７０°である。他の実験例において、前記第５の液晶化合物は、前記第１の液晶化合物２０〜３０重量部に対して、２５〜３５重量部含まれていてもよい。 The cone angle of the liquid crystal composition is 70 °. In another experimental example, the fifth liquid crystal compound may be included in an amount of 25 to 35 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound.
（実験例３）
本実験例において、前記液晶組成物は、前記第１の液晶化合物２２重量％、前記第２の液晶化合物１８重量％、前記第３の液晶化合物２２重量％、及び前記第５の液晶化合物２６重量％を含む。
(Experimental example 3)
In this experimental example, the liquid crystal composition is composed of 22% by weight of the first liquid crystal compound, 18% by weight of the second liquid crystal compound, 22% by weight of the third liquid crystal compound, and 26% by weight of the fifth liquid crystal compound. %including.
また、本実験例において、前記液晶組成物は、下記化学式６で表される第６の液晶化合物８重量％及び下記化学式７で表される第７の液晶化合物４重量％を含む。すなわち、本実験例に係る液晶組成物は、前記実験例１と比較してキラル成分を含む下記第６の液晶化合物及び第７の液晶化合物をさらに含んでいる。 In this experimental example, the liquid crystal composition contains 8% by weight of a sixth liquid crystal compound represented by the following chemical formula 6 and 4% by weight of a seventh liquid crystal compound represented by the following chemical formula 7. That is, the liquid crystal composition according to the present experimental example further includes the following sixth liquid crystal compound and seventh liquid crystal compound containing a chiral component as compared with experimental example 1.
前記液晶組成物は、等方相−ネマチック相の転移温度が６７℃であり、ネマチック相−キラルスメクチック相の転移温度が５８℃である。前記液晶組成物の相変化過程においてスメクチックＡ相を有しない。また、前記液晶組成物は６３℃でブルー相を有する。 The liquid crystal composition has an isotropic phase-nematic phase transition temperature of 67 ° C. and a nematic phase-chiral smectic phase transition temperature of 58 ° C. The liquid crystal composition does not have a smectic A phase in the phase change process. The liquid crystal composition has a blue phase at 63 ° C.
前記液晶組成物のコーン角は７６°である。 The cone angle of the liquid crystal composition is 76 °.
他の実験例において、前記第６の液晶化合物は、前記第１の液晶化合物２０〜３０重量部に対して、６〜１０重量部含まれることができる。また、前記第７の液晶化合物は、前記第１の液晶化合物２０〜３０重量部に対して、２〜６重量部含まれることができる。 In another experimental example, the sixth liquid crystal compound may be included in an amount of 6 to 10 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound. The seventh liquid crystal compound may be included in an amount of 2 to 6 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound.
（実験例４）
本実験例において、前記液晶組成物は、前記第１の液晶化合物２３重量％、前記第２の液晶化合物１８重量％、前記第４の液晶化合物２３重量％、及び前記第５の液晶化合物２６重量％を含む。
(Experimental example 4)
In this experimental example, the liquid crystal composition comprises 23% by weight of the first liquid crystal compound, 18% by weight of the second liquid crystal compound, 23% by weight of the fourth liquid crystal compound, and 26% by weight of the fifth liquid crystal compound. %including.
また、本実験例において、前記液晶組成物は、下記化学式８で表される第１の反応性メソゲン８重量％と、下記化学式９で表される第２の反応性メソゲン２重量％とを含む。前記第１の反応性メソゲン及び前記第２の反応性メソゲンは、前記液晶表示装置の前記配向膜に前記液晶化合物を固定させるものである。 In this experimental example, the liquid crystal composition includes 8% by weight of a first reactive mesogen represented by the following chemical formula 8 and 2% by weight of a second reactive mesogen represented by the following chemical formula 9. . The first reactive mesogen and the second reactive mesogen are for fixing the liquid crystal compound to the alignment film of the liquid crystal display device.
前記第１の反応性メソゲン及び前記第２の反応性メソゲンは、前記液晶組成物の配向過程に影響を及ぼすのみであり、相変化には影響を与えない。従って、本実験例に係る液晶組成物は、前記実験例２と極めて類似した相変化を有する。 The first reactive mesogen and the second reactive mesogen only affect the alignment process of the liquid crystal composition, and do not affect the phase change. Therefore, the liquid crystal composition according to this experimental example has a phase change very similar to that of the experimental example 2.
他の実験例において、前記第１の液晶化合物２０〜３０重量部に対して、前記第１の反応性メソゲンを１〜１０重量部含むことができ、前記第２の反応性メソゲンを１〜３重量部含むことができる。 In another experimental example, 1 to 10 parts by weight of the first reactive mesogen may be included with respect to 20 to 30 parts by weight of the first liquid crystal compound, and 1 to 3 parts of the second reactive mesogen may be included. Part by weight can be included.
（実験例５）
本実験例に係る液晶組成物は、前記第１の液晶化合物２２重量％、前記第２の液晶化合物１８重量％、前記第３の液晶化合物２２重量％、前記第５の液晶化合物２６重量％、前記第６の液晶化合物７重量％、及び前記第７の液晶化合物３重量％を含む。また、前記第１の反応性メソゲン及び前記第２の反応性メソゲンをそれぞれ１重量％含む。
(Experimental example 5)
The liquid crystal composition according to this experimental example includes 22% by weight of the first liquid crystal compound, 18% by weight of the second liquid crystal compound, 22% by weight of the third liquid crystal compound, 26% by weight of the fifth liquid crystal compound, 7% by weight of the sixth liquid crystal compound and 3% by weight of the seventh liquid crystal compound. Each of the first reactive mesogen and the second reactive mesogen contains 1% by weight.
本実験例に係る液晶組成物は、前記等方相−ネマチック相の転移温度が６７℃であり、ネマチック相−キラルスメクチック相の転移温度が５８℃である。前記液晶組成物の相変化過程においてスメクチックＡ相を有しない。また、前記液晶組成物は６３℃でブルー相を有する。前記液晶組成物のコーン角は７６°である。すなわち、実験例３に係る液晶組成物に反応性メソゲンをさらに含んでいても、前記相変化は同様である。 The liquid crystal composition according to this experimental example has an isotropic phase-nematic phase transition temperature of 67 ° C. and a nematic phase-chiral smectic phase transition temperature of 58 ° C. The liquid crystal composition does not have a smectic A phase in the phase change process. The liquid crystal composition has a blue phase at 63 ° C. The cone angle of the liquid crystal composition is 76 °. That is, the phase change is the same even when the liquid crystal composition according to Experimental Example 3 further includes a reactive mesogen.
他の実験例において、前記液晶組成物は、前記第１の液晶化合物２０〜３０重量部に対して、光開始剤０.０２〜０.０６重量部をさらに含むことができる。 In another experimental example, the liquid crystal composition may further include 0.02 to 0.06 parts by weight of a photoinitiator with respect to 20 to 30 parts by weight of the first liquid crystal compound.
（本発明の他の実施形態に係る液晶組成物）
本実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物を含み、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物を含み、かつ下記化学式３で表される化合物からなる群より選択される少なくとも１種の第３の液晶化合物を含む。下記第１の液晶化合物及び第３の液晶化合物はキラル成分を含む。
(Liquid crystal composition according to another embodiment of the present invention)
The liquid crystal composition according to this embodiment includes at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 1, and is selected from the group consisting of compounds represented by the following chemical formula 2 At least one second liquid crystal compound, and at least one third liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 3. The following first liquid crystal compound and third liquid crystal compound contain a chiral component.
前記化学式１、前記化学式２、及び前記化学式３において、Ｒ１、Ｒ２及びＲ３は、それぞれ炭素数が５〜１０であるアルキル基である。 In the chemical formula 1, the chemical formula 2, and the chemical formula 3, R1, R2, and R3 are each an alkyl group having 5 to 10 carbon atoms.
本実施形態に係る液晶組成物において、第１の液晶化合物２０〜３０重量部に対して、前記第２の液晶化合物を３０〜４０重量部含み、第１の液晶化合物２０〜３０重量部に対して、前記第３の液晶化合物を３５〜４５重量部含む。 In the liquid crystal composition according to this embodiment, the second liquid crystal compound is contained in an amount of 30 to 40 parts by weight with respect to the first liquid crystal compound in an amount of 20 to 30 parts by weight, and the first liquid crystal compound in an amount of 20 to 30 parts by weight. And 35 to 45 parts by weight of the third liquid crystal compound.
キラル成分を含む液晶化合物の組成比が高いため、前記液晶組成物は大きいカイラリティを有する。それ故に、前記液晶組成物の螺旋ピッチは短い。また、前記液晶組成物は、従来の液晶組成物と比較して大きなコーン角を有する。 Since the composition ratio of the liquid crystal compound containing a chiral component is high, the liquid crystal composition has a large chirality. Therefore, the helical pitch of the liquid crystal composition is short. Further, the liquid crystal composition has a large cone angle as compared with a conventional liquid crystal composition.
本実験例において、前記液晶組成物は、前記第１の液晶化合物２４重量％、前記第２の液晶化合物３６重量％、前記第３の液晶化合物４０重量％を含む。本実験例に係る液晶組成物は、等方相−ネマチック相の転移温度が８２.９℃であり、ネマチック相−キラルスメクチック相の転移温度が６９.１℃である。本実験例において、前記液晶組成物のコーン角は７７°であり、分極モーメントは５６ｎＣ／ｃｍ２である。 In this experimental example, the liquid crystal composition includes 24% by weight of the first liquid crystal compound, 36% by weight of the second liquid crystal compound, and 40% by weight of the third liquid crystal compound. The liquid crystal composition according to this experimental example has an isotropic phase-nematic phase transition temperature of 82.9 ° C. and a nematic phase-chiral smectic phase transition temperature of 69.1 ° C. In this experimental example, the liquid crystal composition has a cone angle of 77 ° and a polarization moment of 56 nC / cm 2 .
本実施形態に係る液晶組成物は、相変化過程においてスメクチックＡ（ＳｍＡ）相を有しない。また、上述した実施形態に係る液晶組成物とは異なり、ブルー相を有しない。 The liquid crystal composition according to the present embodiment does not have a smectic A (SmA) phase in the phase change process. Further, unlike the liquid crystal composition according to the above-described embodiment, it does not have a blue phase.
その他に、本実施形態に係る液晶組成物は、反応性メソゲン及び光開始剤をさらに含むこともできる。 In addition, the liquid crystal composition according to this embodiment may further include a reactive mesogen and a photoinitiator.
（本発明のさらに他の実施形態に係る液晶組成物）
本実施形態に係る液晶組成物は４種以上の液晶化合物を含む。前記４種以上の液晶化合物の少なくとも１種の液晶化合物はキラル成分を含む。
(Liquid crystal composition according to still another embodiment of the present invention)
The liquid crystal composition according to this embodiment contains four or more liquid crystal compounds. At least one liquid crystal compound of the four or more liquid crystal compounds includes a chiral component.
本実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物と、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物と、下記化学式３で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物と、下記化学式４で表される第４の液晶化合物とを含む。 The liquid crystal composition according to this embodiment is selected from the group consisting of at least one first liquid crystal compound selected from the group consisting of the compound represented by the following chemical formula 1 and the compound represented by the following chemical formula 2. At least one second liquid crystal compound, at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 3, and a fourth liquid crystal compound represented by the following chemical formula 4: Including.
前記第１の液晶化合物３０〜４０重量部に対して、前記第２の液晶化合物は５〜１５重量部、前記第３の液晶化合物は２０〜３０重量部、前記第４の液晶化合物は２５〜３５重量部含まれる。前記化学式１〜４において、前記Ｒ１、Ｒ２、Ｒ３、Ｒ４、Ｒ５及びＲ６は、それぞれ炭素数が５〜１０であるアルキル基である。 The second liquid crystal compound is 5 to 15 parts by weight, the third liquid crystal compound is 20 to 30 parts by weight, and the fourth liquid crystal compound is 25 to 25 parts by weight with respect to 30 to 40 parts by weight of the first liquid crystal compound. 35 parts by weight are included. In the chemical formulas 1 to 4, R1, R2, R3, R4, R5, and R6 are each an alkyl group having 5 to 10 carbon atoms.
従来の液晶組成物と比較してキラル成分を含む液晶化合物の組成比が高い前記液晶組成物は大きいカイラリティを有する。それ故に、前記液晶組成物の螺旋ピッチは短い。 The liquid crystal composition having a high composition ratio of a liquid crystal compound containing a chiral component as compared with a conventional liquid crystal composition has a large chirality. Therefore, the helical pitch of the liquid crystal composition is short.
本実施形態に係る液晶組成物は、相変化においてブルー相及びスメクチックＡ相を有しない。 The liquid crystal composition according to this embodiment does not have a blue phase and a smectic A phase in the phase change.
（実験例６）
本実験例において、前記液晶組成物は、前記第１の液晶化合物３５重量％、前記第２の液晶化合物１０重量％、前記第３の液晶化合物２５重量％、及び前記第４の液晶化合物３０重量％を含む。ここで、前記Ｒ１はＣ６（炭素数が６であるアルキル基）であり、Ｒ２はＣ７（炭素数が７であるアルキル基）である。
(Experimental example 6)
In this experimental example, the liquid crystal composition includes 35% by weight of the first liquid crystal compound, 10% by weight of the second liquid crystal compound, 25% by weight of the third liquid crystal compound, and 30% by weight of the fourth liquid crystal compound. %including. Here, R1 is C 6 (an alkyl group having 6 carbon atoms), and R2 is C 7 (an alkyl group having 7 carbon atoms).
図７は、本実験例に係る液晶組成物の相変化を示している。本実験例に係る液晶組成物はブルー相及びスメクチックＡ相を有しない。 FIG. 7 shows the phase change of the liquid crystal composition according to this experimental example. The liquid crystal composition according to this experimental example does not have a blue phase and a smectic A phase.
図７に示すように、前記液晶組成物は１００℃で等方相を有し、９０℃でネマチック相を有し、８３℃でキラルスメクチック相を有する。実質的に、等方相−ネマチック相の転移温度は９０.３℃〜８４℃である。また、ネマチック相−キラルスメクチック相の転移温度は８３℃〜６９.５℃である。 As shown in FIG. 7, the liquid crystal composition has an isotropic phase at 100 ° C., a nematic phase at 90 ° C., and a chiral smectic phase at 83 ° C. The transition temperature of the isotropic phase to the nematic phase is substantially 90.3 ° C to 84 ° C. The nematic phase-chiral smectic phase transition temperature is 83 ° C to 69.5 ° C.
前記液晶組成物のコーン角は６２°であり、分極モーメントは１８７ｎＣ／ｃｍ２である。 The liquid crystal composition has a cone angle of 62 ° and a polarization moment of 187 nC / cm 2 .
（実験例７）
本実験例において、前記液晶組成物の組成比は異なる。本実験例に係る液晶組成物は、前記第１の液晶化合物３５重量％、前記第２の液晶化合物１１重量％、前記第３の液晶化合物２５重量％、及び前記第４の液晶化合物２９重量％を含む。
(Experimental example 7)
In this experimental example, the composition ratio of the liquid crystal composition is different. The liquid crystal composition according to this experimental example includes 35% by weight of the first liquid crystal compound, 11% by weight of the second liquid crystal compound, 25% by weight of the third liquid crystal compound, and 29% by weight of the fourth liquid crystal compound. including.
前記液晶組成物は、等方相−ネマチック相の転移温度が９２℃であり、ネマチック相−キラルスメクチック相の転移温度が７２℃である。前記液晶組成物の相変化過程において、ブルー相及びスメクチックＡ相を有しない。前記液晶組成物のコーン角は６２°である。 The liquid crystal composition has an isotropic phase-nematic phase transition temperature of 92 ° C. and a nematic phase-chiral smectic phase transition temperature of 72 ° C. The phase change process of the liquid crystal composition does not have a blue phase and a smectic A phase. The cone angle of the liquid crystal composition is 62 °.
（実験例８）
本実験例において、前記液晶組成物は、前記第１の液晶化合物３３重量％、前記第２の液晶化合物１０重量％、前記第３の液晶化合物２４重量％、及び前記第４の液晶化合物２８重量％を含む。
(Experimental example 8)
In this experimental example, the liquid crystal composition comprises 33% by weight of the first liquid crystal compound, 10% by weight of the second liquid crystal compound, 24% by weight of the third liquid crystal compound, and 28% by weight of the fourth liquid crystal compound. %including.
また、本実験例において、前記液晶組成物は、下記化学式５で表される第１の反応性メソゲン４重量％と、下記化学式６で表される第２の反応性メソゲン１重量％とを含む。 In this experimental example, the liquid crystal composition includes 4% by weight of a first reactive mesogen represented by the following chemical formula 5 and 1% by weight of a second reactive mesogen represented by the following chemical formula 6. .
本実験例に係る液晶組成物は、前記実験例６及び前記実験例７と同様の相変化を有する。 The liquid crystal composition according to this experimental example has the same phase change as in the experimental example 6 and the experimental example 7.
他の実験例において、前記第１の液晶化合物３０〜４０重量部に対して、前記第１の反応性メソゲンを２〜６重量部含むことができ、前記第２の反応性メソゲンを０.５〜１.５重量部含むことができる。 In another experimental example, 2 to 6 parts by weight of the first reactive mesogen may be included with respect to 30 to 40 parts by weight of the first liquid crystal compound, and 0.5% of the second reactive mesogen may be included. -1.5 parts by weight can be included.
（本発明のさらに他の実施形態に係る液晶組成物）
本実施形態に係る液晶組成物は２種以上の液晶化合物を含む。前記２種以上の液晶化合物の少なくとも１種の液晶化合物はキラル成分を含む。
(Liquid crystal composition according to still another embodiment of the present invention)
The liquid crystal composition according to this embodiment contains two or more liquid crystal compounds. At least one liquid crystal compound of the two or more liquid crystal compounds includes a chiral component.
本実施形態に係る液晶組成物は、下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物と、下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物とを含む。 The liquid crystal composition according to this embodiment is selected from the group consisting of at least one first liquid crystal compound selected from the group consisting of the compound represented by the following chemical formula 1 and the compound represented by the following chemical formula 2. And at least one second liquid crystal compound.
また、本実施形態に係る液晶組成物は、下記化学式３で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物と、下記化学式４で表される第４の液晶化合物とをさらに含むことができる。 In addition, the liquid crystal composition according to the present embodiment includes at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 3 and a fourth liquid crystal compound represented by the following chemical formula 4. And can further be included.
前記第１の液晶化合物２０〜３０重量部に対して、前記第２の液晶化合物を１５〜２０重量部、前記第３の液晶化合物を２０〜３０重量部、前記第４の液晶化合物を２５〜３５重量部含む。前記化学式１〜４において、前記Ｒ１、Ｒ２、Ｒ３、Ｒ４、Ｒ５及びＲ６は、それぞれ炭素数が５〜１０であるアルキル基である。 15 to 20 parts by weight of the second liquid crystal compound, 20 to 30 parts by weight of the third liquid crystal compound, and 25 to 25 parts of the fourth liquid crystal compound with respect to 20 to 30 parts by weight of the first liquid crystal compound. Contains 35 parts by weight. In the chemical formulas 1 to 4, R1, R2, R3, R4, R5, and R6 are each an alkyl group having 5 to 10 carbon atoms.
従来の液晶組成物と比較してキラル成分を含む液晶化合物の組成比が高い前記液晶組成物は大きいカイラリティを有する。それ故に、前記液晶組成物の螺旋ピッチは短い。 The liquid crystal composition having a high composition ratio of a liquid crystal compound containing a chiral component as compared with a conventional liquid crystal composition has a large chirality. Therefore, the helical pitch of the liquid crystal composition is short.
本実施形態に係る液晶組成物は、相変化においてネマチック相及びスメクチックＡ相を有しない。 The liquid crystal composition according to this embodiment does not have a nematic phase and a smectic A phase in the phase change.
（実験例９）
本実験例において、前記液晶組成物は、前記第１の液晶化合物２５重量％、前記第２の液晶化合物１８重量％、前記第３の液晶化合物２６重量％、及び前記第４の液晶化合物３０重量％を含む。ここで、前記Ｒ１はＣ９（炭素数が９であるアルキル基）である。
(Experimental example 9)
In this experimental example, the liquid crystal composition includes 25% by weight of the first liquid crystal compound, 18% by weight of the second liquid crystal compound, 26% by weight of the third liquid crystal compound, and 30% by weight of the fourth liquid crystal compound. %including. Here, R1 is C 9 (an alkyl group having 9 carbon atoms).
前記液晶組成物は等方相−スメクチックＡ相の転移温度が６１℃である。前記液晶組成物のコーン角は７０°である。 The liquid crystal composition has an isotropic phase-smectic A phase transition temperature of 61 ° C. The cone angle of the liquid crystal composition is 70 °.
（実験例１０）
本実験例において、前記液晶組成物は、前記第１の液晶化合物２５重量％、前記第２の液晶化合物１７重量％、前記第３の液晶化合物２６重量％、及び前記第４の液晶化合物２９重量％を含む。ここで、前記Ｒ１はＣ９（炭素数が９であるアルキル基）である。
(Experimental example 10)
In this experimental example, the liquid crystal composition comprises 25% by weight of the first liquid crystal compound, 17% by weight of the second liquid crystal compound, 26% by weight of the third liquid crystal compound, and 29% by weight of the fourth liquid crystal compound. %including. Here, R1 is C 9 (an alkyl group having 9 carbon atoms).
さらに、本実験例において、前記液晶組成物は、下記化学式５で表される第１の反応性メソゲン１重量％と、下記化学式６で表される第２の反応性メソゲン１重量％とを含む。 Further, in this experimental example, the liquid crystal composition includes 1% by weight of a first reactive mesogen represented by the following chemical formula 5 and 1% by weight of a second reactive mesogen represented by the following chemical formula 6. .
図８は、本実験例に係る液晶組成物の相変化を示している。前記液晶組成物は等方相−スメクチックＡ相の転移温度が６１℃である。前記液晶組成物のコーン角は７０°である。本実験例に係る液晶組成物は、前記実験例９と同様の相変化を有する。 FIG. 8 shows the phase change of the liquid crystal composition according to this experimental example. The liquid crystal composition has an isotropic phase-smectic A phase transition temperature of 61 ° C. The cone angle of the liquid crystal composition is 70 °. The liquid crystal composition according to this experimental example has the same phase change as that of the experimental example 9.
他の実験例において、前記第１の液晶化合物２０〜３０重量部に対して、前記第１の反応性メソゲンを０.５〜１.５重量部含むことができ、前記第２の反応性メソゲンを０.５〜１.５重量部含むことができる。 In another experimental example, the first reactive mesogen may be included in an amount of 0.5 to 1.5 parts by weight with respect to 20 to 30 parts by weight of the first liquid crystal compound. Can be included in an amount of 0.5 to 1.5 parts by weight.
また、他の実験例において、前記液晶組成物は、前記第１の液晶化合物２０〜３０重量部に対して、光開始剤０.０２〜０.０６重量部をさらに含むことができる。 In another experimental example, the liquid crystal composition may further include 0.02 to 0.06 parts by weight of a photoinitiator with respect to 20 to 30 parts by weight of the first liquid crystal compound.
以上、実施形態を参照して説明したが、当該技術分野において通常の知識を有する者は後述する特許請求の範囲に記載された本発明の思想及び領域を逸脱しない範囲内で本発明を多様に修正し、及び変更することが可能であることを理解することができる。また、本発明に開示された実施形態は、本発明の技術思想を限定するためのものではなく、後述する特許請求の範囲及びそれと同等の範囲内にあるすべての技術思想は、本発明の権利範囲に含まれるものと解釈されなければならない。 Although the present invention has been described with reference to the embodiments, those having ordinary knowledge in the technical field can make various modifications of the present invention without departing from the spirit and scope of the present invention described in the claims. It can be understood that modifications and changes can be made. Further, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, and all technical ideas within the scope of the claims and the equivalents thereof are described below. It should be interpreted as being included in the scope.
１００ 第１の表示基板
１１０ 第１のベース基板
１２０ 第１の電極
１３０ 第２の電極
２００ 第２の表示基板
100 First display substrate 110 First base substrate 120 First electrode 130 Second electrode 200 Second display substrate
Claims (19)
下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物１５〜２５重量部とを含む液晶組成物。
A liquid crystal composition comprising 15 to 25 parts by weight of at least one second liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 2.
前記第１の反応性メソゲンが１〜１０重量部であり、前記第２の反応性メソゲンが１〜３重量部であることを特徴とする、請求項５に記載の液晶組成物。
6. The liquid crystal composition according to claim 5, wherein the first reactive mesogen is 1 to 10 parts by weight and the second reactive mesogen is 1 to 3 parts by weight.
前記第１の基板と相対する第２の基板と、
前記第２の基板上に設けられ、第１の駆動電圧が印加される第１の電極と、
前記第２の基板上に設けられ、平面上において前記第１の電極と離隔して設けられ、前記第１の駆動電圧と異なる第２の駆動電圧が印加される第２の電極と、
前記第１の基板と前記第２の基板との間に設けられる液晶層とを有し、
前記液晶層は、
下記化学式１で表される化合物からなる群より選択される少なくとも１種の第１の液晶化合物２０〜３０重量部と、
下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物１５〜２５重量部とを含むことを特徴とする液晶表示装置。
A second substrate facing the first substrate;
A first electrode provided on the second substrate to which a first driving voltage is applied;
A second electrode provided on the second substrate, spaced apart from the first electrode on a plane, and applied with a second drive voltage different from the first drive voltage;
A liquid crystal layer provided between the first substrate and the second substrate;
The liquid crystal layer is
20-30 parts by weight of at least one first liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 1,
A liquid crystal display device comprising 15 to 25 parts by weight of at least one second liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 2.
下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物３０〜４０重量部と、
下記化学式３で表される第３の液晶化合物３５〜４５重量部とを含む液晶組成物。
30 to 40 parts by weight of at least one second liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 2:
A liquid crystal composition comprising 35 to 45 parts by weight of a third liquid crystal compound represented by the following chemical formula 3.
下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物５〜１５重量部と、
下記化学式３で表される化合物からなる群より選択される少なくとも１種の第３の液晶化合物２０〜３０重量部と、
下記化学式４で表される第４の液晶化合物２５〜３５重量部とを含む液晶組成物。
5 to 15 parts by weight of at least one second liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 2:
20 to 30 parts by weight of at least one third liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 3,
A liquid crystal composition comprising 25 to 35 parts by weight of a fourth liquid crystal compound represented by the following chemical formula 4.
前記第１の反応性メソゲンが１〜６重量部であり、前記第２の反応性メソゲンが０.５〜１.５重量部であることを特徴とする、請求項１４に記載の液晶組成物。
The liquid crystal composition according to claim 14, wherein the first reactive mesogen is 1 to 6 parts by weight and the second reactive mesogen is 0.5 to 1.5 parts by weight. .
下記化学式２で表される化合物からなる群より選択される少なくとも１種の第２の液晶化合物１５〜２０重量部と、
下記化学式３で表される化合物からなる群より選択される少なくとも１種の第３の液晶化合物２０〜３０重量部と、
下記化学式４で表される第４の液晶化合物２５〜３５重量部とを含む液晶組成物。
15 to 20 parts by weight of at least one second liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 2;
20 to 30 parts by weight of at least one third liquid crystal compound selected from the group consisting of compounds represented by the following chemical formula 3,
A liquid crystal composition comprising 25 to 35 parts by weight of a fourth liquid crystal compound represented by the following chemical formula 4.
前記第１の反応性メソゲンが０.５〜１.５重量部であり、前記第２の反応性メソゲンが０.５〜１.５重量部であることを特徴とする、請求項１７に記載の液晶組成物。
The first reactive mesogen is 0.5 to 1.5 parts by weight, and the second reactive mesogen is 0.5 to 1.5 parts by weight. Liquid crystal composition.
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