CN104232105A - 一种液晶混合物、液晶显示面板、液晶显示装置 - Google Patents

一种液晶混合物、液晶显示面板、液晶显示装置 Download PDF

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CN104232105A
CN104232105A CN201410406436.0A CN201410406436A CN104232105A CN 104232105 A CN104232105 A CN 104232105A CN 201410406436 A CN201410406436 A CN 201410406436A CN 104232105 A CN104232105 A CN 104232105A
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谢畅
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BOE Technology Group Co Ltd
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Abstract

本发明提供一种液晶混合物、液晶显示面板和液晶显示装置。本发明的液晶混合物由于包括负性液晶,且其垂直介电系数控制在3.5-4.5之间,相对于不包括负性液晶的液晶混合物能够提高光线的透过率;同时,本发明的液晶混合物的清亮点及该液晶混合物制备的显示器的响应时间和高温残像水平等参数都能满足作为液晶显示器的要求。

Description

一种液晶混合物、液晶显示面板、液晶显示装置
技术领域
本发明涉及显示产品制造技术领域,具体地,涉及一种液晶混合物、液晶显示面板、液晶显示装置。
背景技术
液晶是相态的一种,因为其特殊的物理、化学、光学特性,20世纪中叶开始被广泛应用在轻薄型的显示技术上。人们熟悉的物质状态(又称相)为气、液、固,较为生疏的是电浆和液晶。液晶相要具有特殊形状分子组合才会产生,它们可以流动,又拥有结晶的光学性质。液晶的定义,现在已放宽而囊括了在某一温度范围可以实现液晶相,在较低温度为正常结晶之物质。而液晶的组成物质是一种有机化合物,也就是以碳为中心所构成的化合物。同时具有两种物质的液晶,是以分子间力量组合的,它们的特殊光学性质,又对电磁场敏感,极有实用价值。
液晶显示材料具有明显的优点:驱动电压低、功耗微小、可靠性高、显示信息量大、彩色显示、无闪烁、对人体无危害、生产过程自动化、成本低廉、可以制成各种规格和类型的液晶显示器,便于携带等。由于这些优点。用液晶材料制成的计算机终端和电视可以大幅度减小体积等。液晶显示技术对显示显像产品结构产生了深刻影响,促进了微电子技术和光电信息技术的发展。
液晶介电各向异性是决定液晶分子在电场中行为的主要参数,若用ε//,ε分别表示液晶平行,垂直于分子取向的介电常数,各向异性可以用Δε=ε//其中Δε>0,称为正性液晶,反之为负性液晶。
现有技术中,液晶显示器的液晶层一般采用正性液晶,由于正性液晶的垂直介电常数较小,液晶分子与显示面板的倾斜角较大,不利于在平行于显示面板的平面内的旋转,因此,由正性液晶制备的液晶显示器的透过率较低。
发明内容
本发明针对现有液晶材料垂直介电常数较低,造成液晶显示面板光线透过率较低的问题,提供一种具有较大垂直介电常数的液晶混合物、液晶显示面板和液晶显示装置。
本发明的技术方案为一种液晶混合物,包括正性液晶材料、负性液晶材料,所述的液晶混合物的垂直介电系数在3.5-4.5之间。
优选的是,所述的正性液晶材料和负性液晶材料的质量比为7:1-2:1。
优选的是,所述的正性液晶材料和负性液晶材料的质量比为4:1-2:1。在此范围内对光线的透过率提高的幅度比较大,同时,其它液晶的参数比较适合作为显示面板的液晶层材料。
优选的是,所述的正性液晶材料和负性液晶材料的质量比为2:1;所述液晶混合物的垂直介电系数为4.5。
优选的是,还包括中性液晶材料,所述中性液晶材料在所述液晶混合物中的质量百分比为30-50%。其中,中性材料主要用于调节粘度。
优选的是,所述负性液晶材料包括下式中的任意一种或几种:
优选的是,所述正性液晶材料包括下式中的任意一种或几种:
优选的是,所述中性液晶材料包括下式中的任意一种或两种:
本发明的另一个目的是提供一种液晶显示面板,包括液晶层,其特征在于,所述的液晶层是采用上述的液晶混合物制备的。
本发明的另一个目的是提供一种液晶显示装置,包括上述的液晶显示面板。
本发明的有益效果:本发明的液晶混合物由于包括负性液晶,且其垂直介电系数控制在3.5-4.5之间,相对于不包括负性液晶的液晶混合物能够提高光线的透过率;同时,本发明的液晶混合物的清亮点、采用该液晶混合物制备的显示器的响应时间和高温残像水平等参数都能满足作为液晶显示器的要求。
具体实施方式
为使本领域的技术人员更好地理解本发明的技术方案,下面结合具体实施方式对本发明作进一步详细描述。
对比例
本对比例提供一种液晶混合物,包括正性液晶材料和中性液晶材料,其具体液晶组分和各组分质量百分比组成见表1和表2。
实施例1
本实施例提供一种液晶混合物,包括正性液晶材料、中性液晶材料和负性液晶材料,其具体液晶组分和各组分质量百分比组成见表1和表2。
其中,正性液晶材料和负性液晶材料的质量比为7:1。
实施例2
本实施例提供一种液晶混合物,包括正性液晶材料、中性液晶材料和负性液晶材料,其具体液晶组分和各组分质量百分比组成见表1和表2。
其中,正性液晶材料和负性液晶材料的质量比为4:1。
实施例3
本实施例提供一种液晶混合物,包括正性液晶材料、中性液晶材料和负性液晶材料,其具体液晶组分和各组分质量百分比组成见表1和表2。
其中,正性液晶材料和负性液晶材料的质量比为3:1。
实施例4
本实施例提供一种液晶混合物,包括正性液晶材料、中性液晶材料和负性液晶材料,其具体液晶组分和各组分质量百分比组成见表1和表2。
其中,正性液晶材料和负性液晶材料的质量比为2:1。
实施例5
本实施例提供一种液晶混合物,包括正性液晶材料、中性液晶材料和负性液晶材料,其具体液晶组分和各组分质量百分比组成见表1和表2。
其中,正性液晶材料和负性液晶材料的质量比为12:11。
表1 本发明对比例和实施例涉及的液晶材料
表2 实施例和对比例中液晶材料的成分和比例
对比例和实施例1-5的液晶混合物进行下述项目测试:
1.液晶清亮点测试
采用差热分析仪进行测试。
2.介电常数测试和垂直介电常数测试
采用电场法测试,采用精密LCR仪测出空盒电容C0,在电场作用下,液晶分子随电场一起取向,当分子长轴与电场方向一致时,测出C//。反之当液晶指向与电场垂直时,测出C,按下式分别计算出ε//,ε
C 0 = ϵ 0 S d C LC = ϵ 0 ϵ LC S d ⇒ C LC C 0 = ϵ LC
其中,S为电极面积;
d为介质厚度;CLc为测试液晶电容,可以分别计算C//,C
εLC为测试液晶介电常数,可以分别计算ε//,ε
另外,△ε按下式进行,△ε=ε//
3.相对正性液晶材料的透过率提升率
采用液晶显示器V-T(外加电压-光穿透率)测试设备进行测试。
4.响应时间测试
采用液晶显示器响应时间测试设备进行测试。
5.折射率测试
采用阿贝折射仪进行测试。
6.旋转粘度测试
采用brookfiled粘度计进行测试。
7.高温残像消失灰阶测试,分别在1h、3h、5h、1h、8h、24h、48h、72h、96h、168h进行测试。
采用液晶显示器信赖性测试设备进行测试。
测试结果见表3。
表3 实施例和对比例中液晶混合物的性能测试结果
通过表3可知,实施例1-5中的液晶混合物是在正性液晶中加入不同比例的负性液晶材料,由于负性液晶材料的垂直介电常数较大,从而提高了液晶混合物的垂直介电常数,较大的垂直介电常数会使得液晶分子与显示面板的倾斜角更小,也就是更加水平于显示面板进行面内的旋转,此时,液晶显示器的透过率更高。其中,垂直介电常数在3.5-4.5之间对应的实施例1-4,其透过率相比于正性液晶(对比例)可提高1.52%-5%,响应时间小于33ms,信赖性测试结果正常,满足液晶显示器的使用要求。
另外,液晶混合物的垂直介电常数达到5.0时(对应实施例5),其中,正负性液晶质量比为12:11,液晶混合物的响应时间有些变慢,达到36.4ms,高温残像水平比正性液晶差,液晶的清亮点偏低(71℃),用于液晶显示器存在风险。
实施例6
本实施例提供一种液晶显示面板,包括液晶层,所述的液晶层是采用上述的垂直介电系数在3.5-4.5之间的液晶混合物制备的。
实施例7
本实施例提供一种液晶显示装置,包括上述的液晶显示面板。
可以理解的是,以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式,然而本发明并不局限于此。对于本领域内的普通技术人员而言,在不脱离本发明的精神和实质的情况下,可以做出各种变型和改进,这些变型和改进也视为本发明的保护范围。

Claims (10)

1.一种液晶混合物,包括正性液晶材料、负性液晶材料,其特征在于,所述的液晶混合物的垂直介电系数在3.5-4.5之间。
2.根据权利要求1所述的液晶混合物,其特征在于,所述的正性液晶材料和负性液晶材料的质量比为7:1-2:1。
3.根据权利要求2所述的液晶混合物,其特征在于,所述的正性液晶材料和负性液晶材料的质量比为4:1-2:1。
4.根据权利要求3所述的液晶混合物,其特征在于,所述的正性液晶材料和负性液晶材料的质量比为2:1;所述液晶混合物的垂直介电系数为4.5。
5.根据权利要求1所述的液晶混合物,其特征在于,还包括中性液晶材料,所述中性液晶材料在所述液晶混合物中的质量百分比为30-50%。
6.根据权利要求1所述的液晶混合物,其特征在于,所述负性液晶材料包括下式中的任意一种或几种:
7.根据权利要求1所述的液晶混合物,其特征在于,所述正性液晶材料包括下式中的任意一种或几种:
8.根据权利要求1所述的液晶混合物,其特征在于,所述中性液晶材料包括下式中的任意一种或两种:
9.一种液晶显示面板,包括液晶层,其特征在于,所述的液晶层是采用如权利要求1-8任一所述的液晶混合物制备的。
10.一种液晶显示装置,其特征在于,包括如权利要求9所述的液晶显示面板。
CN201410406436.0A 2014-08-18 2014-08-18 一种液晶混合物、液晶显示面板、液晶显示装置 Pending CN104232105A (zh)

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WO2020002401A1 (en) 2018-06-29 2020-01-02 Merck Patent Gmbh Thiophene compound, liquid-crystalline medium and liquid-crystal display comprising the same
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