TWI784142B - 液晶組合物及液晶顯示元件、液晶顯示器 - Google Patents
液晶組合物及液晶顯示元件、液晶顯示器 Download PDFInfo
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Abstract
本揭露涉及液晶組合物,包含該液晶組合物的液晶顯示元件、液晶顯示器,屬於液晶顯示領域。本揭露的液晶組合物包含式I所示的化合物、式II所示的化合物、一種或多種式III所示的化合物、以及至少一種可聚合化合物,該液晶組合物兼具較高的清亮點(CP)、大的K值、適合的光學各向異性(△n)、快速的響應速度。
Description
本揭露屬於液晶顯示領域,更具體地,涉及液晶組合物及包含該液晶組合物的液晶顯示元件、液晶顯示器。
早期商用的TFT-LCD產品基本採用了TN顯示模式,其最大問題是視角窄。隨著產品尺寸的增加,特別是在TV領域的應用,具有廣視野角特點的IPS顯示模式、VA顯示模式依次被開發出來並加以應用,尤其是基於VA顯示模式的改進,分別先後在各大公司得到了突破性的發展,這主要取決於VA模式本身所具有的寬視野角、高對比度和無需摩擦配向等優勢,再有就是,VA模式顯示的對比度對液晶的光學各向異性(△n)、液晶盒的厚度(d)和入射光的波長(λ)依賴度較小,必將使得VA這種模式成為極具前景的顯示技術。
但是,VA模式等的顯示元件所用的液晶介質,本身並不完美,與正介電各向異性的顯示元件相比,其存在介電偏小,響應時間比較慢,驅動電壓比較高等缺點,並且會更容易出現顯示不良、殘像等問題。
目前,應用於顯示元件的響應速度優良、各種顯示不良得到改善的液晶組合物仍然是人們期望獲得的。
為了解決現有技術中存在的問題,本發明人等進行了深入研究後驚奇地發現,藉由使用含有前述的式I所示化合物、式II所示化合物以及式III所示化合物的群組合的液晶組合物,在應用於液晶顯示元件中時,表現出快速的響應速度,從而完成了本揭露。
本揭露的第一個目的在於提供一種液晶組合物,該液晶組合物具較高的清亮點(CP)、大的K值、適合的光學各向異性(△n)、快速的響應速度。
本揭露的第二個目的在於提供一種液晶顯示元件,其包含本揭露的液晶組合物,該液晶顯示元件具有快速的響應速度。
本揭露的再一目的在於提供一種液晶顯示器,其包含本揭露的液晶組合物,該液晶顯示器具有快速的響應速度。
為達到上述目的,本揭露採用下述技術方案:本揭露提供液晶組合物,其包含式I所示的化合物、式II所示的化合物、一種或多種式III所示的化合物、以及至少一種可聚合化合物。
本揭露的液晶組合物中,對於前述的可聚合化合物沒有任何限定,本領域中具有通常知識者能夠根據本領域的通常知識來選擇適宜的可聚合化合物。
本揭露還提供液晶顯示元件,其包含本揭露的液晶組合物,所述液晶顯示元件為主動矩陣尋址顯示元件或者被動矩陣尋址顯示元件。
本揭露還提供液晶顯示器,其包含本揭露的液晶組合物,所述液晶顯示器為主動矩陣尋址顯示器或者被動矩陣尋址顯示器。
[液晶組合物]
本揭露的液晶組合物包含式I所示的化合物、式II所示的化合物、一種或多種式III所示的化合物、以及至少一種可聚合化合物。
作為前述的碳原子數為1-10的烷氧基,可以列舉出例如,甲氧基、乙氧基、正丙氧基、異丙氧基、正丁氧基、異丁氧基、戊氧基、己氧基、庚氧基、辛氧基、壬氧基、癸氧基等。
本揭露的液晶組合物中,較佳地,還包含一種或多種式IV所示化合物:
其中:R3、R4表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、氟取代的碳原子數為1-10的烷氧基、碳原子數為2-10的鏈烯基、氟取代的碳原子數為2-10的鏈烯基、碳原子數為3-8的鏈烯氧基或氟取代的碳原子數為3-8的鏈烯氧基;並且R3、R4所示基團中任意一個或多個不相連的CH2任選被環戊基、環丁基或環丙基取代;Z1、Z2各自獨立地表示單鍵、-CH2CH2-或-CH2O-;表示1,4-亞環己基、1,4-亞環己烯基、1,4-亞苯基或氟代1,4-亞苯基;m、n各自獨立地表示0、1或2且m+n2;且當m+n=1,Z1、Z2為單鍵,或表示1,4-亞苯基時,R3、R4不同時表示碳原子數為1-10的烷氧基。
本揭露的液晶組合物中,較佳地,前述IV所示的化合物選自下述式IV-1至IV-14所示的化合物組成的群組:
其中:R31表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為2-10的鏈烯基、氟取代的碳原子數為2-10的鏈烯基、碳原子數為3-8的鏈烯氧基或氟取代的碳原子數為3-8的鏈烯氧基;R41表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、氟取代的碳原子數為1-10的烷氧基、碳原子數為2-10的鏈烯基、氟取代的碳原子數為2-10的鏈烯基、碳原子數為3-8的鏈烯氧基;並且R31、R41所示基團中任意一個或多個不相連的CH2任選被環戊基、環丁基或環丙基取代。
本揭露的液晶組合物中,較佳地,以可聚合化合物之外的成分的總和為100質量%,前述式I所示的化合物的總質量含量為1-65%;前述式II所示的化合物的總質量含量為1-20%;前述式III所示的化合物的總質量含量為1-25%;可聚合化合物在液晶總質量%基礎上進行添加,前述可聚合化合物的添加量為0.01-1%,較佳為0.03-0.2%;前述式IV所示的化合物的總質量含量為0-50%。
其中,
R5、R6表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、氟取代的碳原子數為1-10的烷氧基、碳原子數為2-10的鏈烯基、或者氟取代的碳原子數為2-10的鏈烯基;各自獨立地表示1,4-亞環己基、1,4-亞環己烯基或1,4-亞苯基;且同時表示1,4-亞環己基時,R5或R6其中之一表示丙基時,另一個不表示乙烯基。
其中,R5、R6表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、氟取代的碳原子數為1-10的烷氧基、碳原子數為2-10的鏈烯基、或者氟取代的碳原子數為2-10的鏈烯基;式V-1中,R5、R6中的一者表示丙基時,另一者不表示乙烯基。
其中,
R7表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、氟取代的碳原子數為1-10的烷氧基、碳原子數為2-10的鏈烯基、氟取代的碳原子數為2-10的鏈烯基;R8表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、或者氟取代的碳原子數為1-10的烷氧基;各自獨立地表示1,4-亞環己基、1,4-亞環己烯基或1,4-亞苯基。
其中,R7表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、氟取代的碳原子數為1-10的烷氧基、碳原子數為2-10的鏈烯基、氟取代的碳原子數為2-10的鏈烯基;R8表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、氟取代的碳原子數為1-10的烷氧基。
其中,R9表示碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、或者氟取代的碳原子數為1-10的烷氧基,這些基團中任意一個或多個不相連的CH2任選被環戊基、環丁基或環丙基取代;R10表示原子數為1-10的烷基、氟取代的碳原子數為1-10的烷基、碳原子數為1-10的烷氧基、或者氟取代的碳原子數為1-10的烷氧基;X表示O或S。
[液晶顯示元件或液晶顯示器]
本揭露還涉及包含上述任意一種液晶組合物的液晶顯示元件或液晶顯示器;所述顯示元件或顯示器為主動矩陣顯示元件或顯示器或被動矩陣顯示元件或顯示器。
可選的,所述液晶顯示元件或液晶顯示器較佳主動矩陣液晶顯示元件或液晶顯示器。
可選的,所述主動矩陣顯示元件或顯示器為PSVA-TFT液晶顯示元件或顯示器。
包含前述的化合物或液晶組合物的液晶顯示元件或液晶顯示器,具有較寬的向列相溫度範圍、較快的響應速度、較低的盒厚。
為了更清楚地說明本揭露,下面結合較佳實施例對本揭露做進一步的說明。本領域中具有通常知識者應當理解,下面所具體描述的內容是說明性的而非限制性的,不應以此限制本揭露的保護範圍。
本說明書中,如無特殊說明,百分比均是指質量百分比,溫度為攝氏度(℃),其他符號的具體意義及測試條件如下:Cp表示液晶清亮點(℃),DSC定量法測試;△n表示光學各向異性,no為尋常光的折射率,ne為非尋常光的折射率,測試條件為25±2℃,589nm,阿貝折射儀測試;△ε表示介電各向異性,△ε=ε∥-ε⊥,其中,ε∥為平行於分子軸的介電常數,ε⊥為垂直於分子軸的介電常數,測試條件為25±0.5℃,20微米平行盒,INSTEC:ALCT-IR1測試;γ1表示旋轉黏度(mPa.s),測試條件為25±0.5℃,20微米平行盒,INSTEC:ALCT-IR1測試;K11為扭曲彈性常數,K33為展曲彈性常數,測試條件為:25℃、INSTEC:ALCT-IR1、18微米垂直盒;液晶組合物的製備方法如下:將各液晶單體按照一定配比稱量後放入不銹鋼燒杯中,將裝有各液晶單體的不銹鋼燒杯置於磁力攪拌儀器上加熱融化,待不銹鋼燒杯中的液晶單體大部份融化後,往不銹鋼燒杯中加入磁力轉子,將混合物攪拌均勻,冷卻到室溫後即得液晶組合物。
本揭露實施例液晶單體結構用代碼表示,液晶環結構、端基、連接基團的代碼表示方法見下表1、表2。
舉例:
,其代碼為CC-Cp-V1;
,其代碼為CPY-2-O2;
,其代碼為CCY-3-O2;
,其代碼為COY-3-O2;
,其代碼為CCOY-3-O2;
,其代碼為Sb-Cp1O-O4;
,其代碼為Sc-Cp1O-O4。
實施例1
液晶組合物的配方及相應的性能如下表3所示。
對比例1
液晶組合物的配方及相應的性能如下表4所示。
將實施例1中的CC-3-V替換為CC-5-V作為對比例1。實施例1與對比例1相比,對比例1常溫有晶體析出,且旋轉黏度增大,K33略有增加,但是γ1/K33增大,響應變慢。由此可知,本揭露的液晶組合物具有適宜的光學各向異性,良好的低溫互溶性,快速的響應速度的特點。
對比例2
液晶組合物的配方及相應的性能如下表5所示。
將實施例1中的CPP-3-2V1替換為CPP-3-2作為對比例2。實施例1與對比例2相比,對比例2折射率變小,清亮點降低,且K值下降。由此可知,本揭露的液晶組合物具有適宜的光學各向異性,較寬的溫度顯示範圍的特點。
對比例3
液晶組合物的配方及相應的性能如下表6所示。
將實施例1中的PY-2O-O4、PY-2O-O2、PY-1O-O4替換為PY-3-O2、PY-5-O2作為對比例3。實施例1與對比例3相比,對比例3的介電下降、折射率降低、清亮點下降。由此可知,本發明的液晶組合物具有適宜的介電各向異性和光學各向異性,較寬的溫度顯示範圍的特點。
實施例2
液晶組合物的配方及相應的性能如下表7所示。
實施例3
液晶組合物的配方及相應的性能如下表8所示。
實施例4
液晶組合物的配方及相應的性能如下表9所示。
實施例5
液晶組合物的配方及相應的性能如下表10所示。
實施例6
液晶組合物的配方及相應的性能如下表11所示。
實施例7
液晶組合物的配方及相應的性能如下表12所示。
實施例8
液晶組合物的配方及相應的性能如下表13所示。
實施例9
液晶組合物的配方及相應的性能如下表14所示。
對比例4
液晶組合物的配方及相應的性能如下表15所示。
將實施例9中的CPP-3-2V1替換為CPP-3-2作為對比例4。與實施例9相比,對比例4的折射率變小,清亮點降低,液晶使用溫度變窄,γ1/K33變大,響應變慢。由此可知,本揭露的液晶組合物具有大的折射率,寬的顯示溫度和快速響應的特點。
實施例10
液晶組合物的配方及相應的性能如下表16所示。
對比例5
液晶組合物的配方及相應的性能如下表17所示。
將實施例10中的CC-3-V替換為CC-5-V作為對比例5。與實施例10相比,對比例5的介電、折射率、清亮點性能相差較小,但γ1/K33變大,響應變慢。由此可知,本揭露的液晶組合物具有快速響應的特點。
實施例11
液晶組合物的配方及相應的性能如下表18所示。
實施例12
液晶組合物的配方及相應的性能如下表19所示。
實施例13
液晶組合物的配方及相應的性能如下表20所示。
對比例6
液晶組合物的配方及相應的性能如下表21所示。
將實施例13中的CPP-3-2V1替換為CPP-5-2作為對比例6。與實施例13相比,對比例6的折射率變小,清亮點降低,液晶使用溫度變窄,γ1/K33變大,響應變慢。由此可知,本揭露的液晶組合物具有大的折射率,寬的顯示溫度和快速響應的特點。且本揭露的液晶組合物用於ODF液晶元件的製程,液晶顯示器無不良顯示。
實施例14
液晶組合物的配方及相應的性能如下表22所示。
實施例15
液晶組合物的配方及相應的性能如下表23所示。
顯然,本揭露的上述實施例僅僅是為清楚地說明本揭露所作的舉例,而並非是對本揭露的實施方式的限定,對於所屬領域中具有通常知識者來說,在上述說明的基礎上還可以做出其它不同形式的變化或變動,這裡無法對所有的實施方式予以窮舉,凡是屬於本揭露的技術方案所引伸出的顯而易見的變化或變動仍處於本揭露的保護範圍之列。
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- 一種液晶顯示元件或液晶顯示器,其包含如請求項1-8中任一項所述的液晶組合物,該液晶顯示元件或該液晶顯示器為主動矩陣尋址顯示元件或顯示器,或者被動矩陣尋址顯示元件或顯示器。
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CN103189471A (zh) * | 2010-10-20 | 2013-07-03 | 捷恩智株式会社 | 液晶组成物及液晶显示元件 |
US20120138852A1 (en) * | 2010-12-07 | 2012-06-07 | Jnc Petrochemical Corporation | Liquid crystal composition and liquid crystal display device |
CN105733607A (zh) * | 2013-03-26 | 2016-07-06 | Dic株式会社 | 液晶组合物以及使用其的液晶显示元件和液晶显示器 |
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US11242486B2 (en) | 2022-02-08 |
US20200239778A1 (en) | 2020-07-30 |
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