TWI767199B - 液晶組合物、液晶顯示元件、液晶顯示器 - Google Patents
液晶組合物、液晶顯示元件、液晶顯示器 Download PDFInfo
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Abstract
本發明涉及液晶組合物,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。本發明的液晶組合物,包含式I所示化合物、式II所示化合物、一種或多種式III所示化合物、一種或多種式IV所示化合物以及3種以上的式V所示化合物,該液晶組合物在維持合適的光學各向異性△n的基礎上具有較低的旋轉黏度γ1、高的對熱和光的穩定性,可以實現液晶顯示的快速回應。
Description
本發明涉及液晶顯示領域,具體涉及一種液晶組合物及包含該液晶組合物的液晶顯示元件或液晶顯示器。
隨著時代進步,液晶顯示已經成為現在的主流顯示器件,液晶化合物的應用範圍也拓展的越來越廣,不僅僅應用於多種類型的顯示器,還可用在電光器件、感測器、液晶天線等中。液晶顯示是一種採用液晶為材料的顯示器。液晶是一類介於固態和液態的有機化合物,在常溫條件下,呈現出既有液體的流動性,又有晶體的光學各向異性,加熱會變成透明液態,冷卻後會變成結晶的混濁固態。
隨著市場的發展,人們對液晶顯示元件的解析度的要求越來越高,例如,市場上4K/8K電視應運而生。高的解析度要求液晶有更快的回應時間。作為液晶材料,液晶加電後的回應時間受液晶化合物的黏度,尤其是旋轉黏度γ1的直接影響。
因此,為了適應高解析度的市場要求,提高液晶顯示元件的回應時間,對液晶顯示元件中使用的液晶組合物的旋轉黏度γ1提出了更高的要求。
為了解決現有技術中存在的至少一個問題,本發明人等進行了深入研究後發現,本發明提供的液晶組合物在維持合適的光學各向異性△n的基礎上具有較低的旋轉黏度γ1、高的對熱和光的穩定性。
本發明的另一目的在於提供一種液晶顯示元件或液晶顯示器,其包含本發明液晶組合物顯示元件或液晶顯示器,具有較寬的向列相溫度範圍、合適的雙折射率各向異性、非常高的電阻率、良好的抗紫外線性能、較快的回應時間,可以廣泛應用於4K和8K顯示。
為達到上述目的,本發明採用下述技術方案:本發明提供一種液晶組合物,所述液晶組合物包含式I所示化合物、式II所示化合物、一種或多種式III所示化合物、一種或多種式IV所示化合物以及3種以上的式V所示化合物:
本發明的液晶組合物在維持合適的光學各向異性△n的基礎上具有較低的旋轉黏度γ1、高的對熱和光的穩定性。
本發明還提供液晶顯示元件,其包含本發明的液晶組合物,所述液晶顯示元件為有源矩陣定址顯示元件或者無源矩陣定址顯示元件。
本發明還提供液晶顯示器,其包含本發明的液晶組合物,所述液晶顯示器為有源矩陣定址顯示器或者無源矩陣定址顯示器。
具體實施方式
[液晶組合物]
本發明的液晶組合物在維持合適的光學各向異性△n的基礎上具有較低的旋轉黏度、高的對熱和光的穩定性。
作為前述碳原子數為1-10的烷基,可以列舉出例如,甲基、乙基、正丙基、異丙基、正丁基、異丁基、叔丁基、正戊基、異戊基、己基、庚基、辛基、壬基、癸基等。
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。
作為前述碳原子數為2-10的鏈烯基,可以列舉出例如,乙烯基、1-丙烯基、1-丁烯基、2-丁烯基、3-丁烯基、1-戊烯基、2-戊烯基、3-戊烯基、4-戊烯基、1-己烯基、2-己烯基、3-己烯基等。
前述的氟取代的碳原子數為1-10的烷基、氟取代的碳原子數為1-10的烷氧基、氟取代的碳原子數為2-10的鏈烯基、氟取代的碳原子數為3-8的鏈烯
氧基中的“氟取代”可以是單氟取代,或者、二氟取代、三氟取代等多氟取代,也可以是全氟取代,對氟的取代數沒有特別的限定。例如,作為氟取代的碳原子數為1-10的烷基,可以列舉出氟代甲基、二氟甲基、三氟甲基、1-氟代乙基、2-氟代乙基、1,2-二氟乙基、1,1-二氟乙基、1,1,2-三氟乙基、1,1,1,2,2-五氟取代乙基等但不限於此。
本發明的液晶組合物中,對於作為其組成成分的式I、式II、式III、式IV所示的化合物的含量沒有特別的限制。在一實施方式中,前述式I所示化合物、前述式II所示化合物的總質量含量為20-50%,前述式III所示化合物的總質量含量為1-15%,前述式IV所示化合物的總質量含量為1-20%,前述一種或多種式V所示化合物的總質量含量為1-40%。
本發明所述的液晶組合物的一個實施方式中,前述液晶組合物還包含一種或多種式VI所示的化合物:
其中,R7、R8各自獨立地表示碳原子數為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;
、各自獨立地表示1,4-亞苯基、1,4-亞環己基或1,4-亞環己烯基。
通過在本發明的液晶組合物中組合使用式VI所示化合物,能夠增大液晶組合物的光學各向異性和提高液晶組合物的清亮點。
本發明的液晶組合物的另一實施方式中,前述液晶組合物還包含一種或多種式VII所示的化合物:
其中,R9、R10各自獨立地表示碳原子數為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R9、R10所示基團中任意一個或多個-CH2-任選被亞環戊基、亞環丁基或亞環丙基替代;X表示-O-、-S-或-CH2O-。
通過在本發明的液晶組合物中組合使用前述的式VII所示化合物,能夠使液晶組合物具有較大的負的介電各向異性,有利於降低器件的驅動電壓。
本發明的液晶組合物的再一實施方式中,前述液晶組合物還包含一種或多種除式I、式II所示化合物以外的式VIII所示化合物:
其中,R11、R12各自獨立地表示碳原子數為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;、各自獨立地表示1,4-亞苯基、1,4-亞環己基或1,4-亞環己烯基。
通過在本發明的液晶組合物中含有式VIII所示化合物,能夠提高液晶組合物的互溶性,降低旋轉黏度,從而提高本發明的液晶組合物的回應速度。
本發明的液晶組合物的另一實施方式中,前述液晶組合物還包含一種或多種式IX所示化合物:
其中,R13、R14各自獨立地表示碳原子數為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;X1、X2、X3各自獨立地表示H或F。
通過在本發明的液晶組合物中含有式IX所示化合物,能夠提高液晶組合物的清亮點。
本發明的液晶化合物中還可以加入各種功能的摻雜劑,摻雜劑含量選自0.01-1%之間,這些摻雜劑可以列舉出例如抗氧化劑、紫外線吸收劑、手性劑。
本發明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有源矩陣顯示元件或顯示器或無源矩陣顯示元件或顯示器。
本發明的液晶顯示元件或液晶顯示器依據一實施例有源矩陣定址液晶顯示元件或液晶顯示器。
前述有源矩陣顯示元件或顯示器具體可以列舉出例如TN-TFT或IPS-TFT或VA-TFT液晶顯示元件或其他TFT顯示器。
本發明所提供的液晶組合物在維持合適的光學各向異性△n的基礎上具有較低的旋轉黏度γ1、高的對熱和光的穩定性。
[液晶顯示元件或液晶顯示器]
本發明的液晶顯示元件或液晶顯示器包含本發明的液晶組合物。本發明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、合適的雙折射率各向異性、非常高的電阻率、良好的抗紫外線性能、較快的回應時間,可以廣泛應用於4K和8K顯示。
實施例
為了更清楚地說明本發明,下面結合實施例對本發明做進一步的說明。本領域技術人員應當理解,下面所具體描述的內容是說明性的而非限制性的,不應以此限制本發明的保護範圍。
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∥為平行于分子軸的介電常數,ε⊥為垂直于分子軸的介電常數,測試條件為25±0.5℃,20微米垂直盒,INSTEC:ALCT-IR1測試;γ1表示旋轉黏度(mPa‧s),測試條件為25±0.5℃,20微米垂直盒,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、20微米垂直盒;VHR表示電壓保持率(%),測試條件為60±1℃、電壓為±5V、脈衝寬度為10ms、電壓保持時間1.667ms。測試設備為TOYO Model6254液晶性能綜合測試儀;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。
本發明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。
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。
對比例1中將實施例1中CLY-3-O2替換為CCY-3-O2,其餘與實施例1相同。與對比例1相比,本發明的實施例1中γ1顯著下降,能夠提升液晶顯示器的回應速度。
實施例2
液晶組合物的配方及相應的性能如下表5所示。
對比例2
液晶組合物的配方及相應的性能如下表6所示。
分別將實施例2中CLY-3-O2替換為CCY-3-O2、CC-2-3替換為CC-V-V,其餘與實施例2相同,作為對比例2。與對比例2相比,本發明的實施例2中γ1下降。
液晶組合物的信賴性通過紫外、高溫老化試驗並進行VHR測試來進行,液晶組合物紫外、高溫試驗前後的VHR資料變化越小,抗紫外、抗高溫能力越強。因此,通過比較各個實施例、比較例在試驗前後的VHR資料的差來判斷抗紫外、抗高溫能力。
以上實驗把實施例液晶、對比例液晶分別灌注在測試片中進行測試,VHR表示電壓保持率(%),測試條件為60±1℃、電壓為±5V、脈衝寬度為10ms、電壓保持時間1.667ms;測試設備為TOYO Model6254液晶性能綜合測試儀;VHR初始值為對不經過任何處理的測試片進行測試獲得的資料,VHR紫外是把灌注好液晶的片在常溫紫外光下照射5000mj後測試得到的VHR值,VHR高溫老化是把灌注好液晶的片在高溫烘箱100℃中放置1小時後進行測試得到的VHR值。與對比例2相比,實施例2的VHR紫外、VHR高溫老化值均高於對比例的VHR,特別是經過紫外光照後測試得到的VHR紫外值要明顯高於對比例2,說明實施例2的液晶組合物的抗紫外、抗高溫的能力要比對比例2強,從而在工作過程中抵抗外界環境破壞的能力也比對比例2強,信賴性更高。
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。
實施例10
液晶組合物的配方及相應的性能如下表15所示。
顯然,本發明的上述實施例僅僅是為清楚地說明本發明所作的舉例,而並非是對本發明的實施方式的限定,對於所屬領域的普通技術人員來說,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,凡是屬於本發明的技術方案所引伸出的顯而易見的變化或變動仍處於本發明的保護範圍之列。
Claims (9)
- 一種液晶組合物,包含式I所示化合物、式II所示化合物、一種或多種式III所示化合物、一種或多種式IV所示化合物、3種以上的式V所示化合物、至少一種式VII-10所示的化合物以及至少一種式VII-12所示的化合物:
- 如請求項1所述的液晶組合物,其中所述式I所示化合物、所述式II所示化合物的總質量含量為20-50%,所述式III所示化合物的總質量含量為1-15%,所述式IV所示化合物的總質量含量為1-20%,所述式V所示化合物的總質量含量為1-40%。
- 一種液晶顯示元件,包含請求項1-8的任一項所述的液晶組合物,所述液晶顯示元件為有源矩陣定址顯示元件,或者無源矩陣定址顯示元件。
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