Enhancement of Brightness and Contrast in Fluorescent Liquid Crystal Display Using Sensitizing Effect

利用敏化效应增强荧光液晶显示器的亮度和对比度

基本信息

  • 批准号:
    14550032
  • 负责人:
  • 金额:
    $ 1.92万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2002
  • 资助国家:
    日本
  • 起止时间:
    2002 至 2004
  • 项目状态:
    已结题

项目摘要

Emissive liquid crystal display (LCD) in which a dichroic phosphor is dissolved as a guest material have been reported. Brightness and contrast of the LCDsare enhanced has been demonstrated by using sensitizing effect.(1)The remarkable increase of the green fluorescence intensity from the coumarin-6 in the LC host can be obtained by adding the blue fluorescent dichroic dye or the fluorescent LC as a sensitizer. Applying the sensitization to the emissive type LCD of which color is switched from green to blue, the luminance of the green fluorescence and the color switching property are improved. The color switching between blue to red in the LCD assembled with the blue LED and the red fluorescent LC cell is also improved by adding the sensitizer. These results indicate that the light utilization of the excitation back light is also increased by using the sensitizing effect.(2)The increase of the green and red fluorescence intensity of dichroic dyes in the LC host can be obtained by the sensitizing effect. Relations between absorption and emission dichroic ratios are measured in the fluorescent LC cell with and without the sensitizer. When the voltage is applied to the cell, the fluorescence intensity which is excited by the polarized UV light parallel to the LC direction decreases and becomes lower than that excited by the polarized UV light perpendicular to the LC direction. Moreover, it is clarified that both the brightness and the contrast can be enhanced, if the dichroic ratio of the sensitizer is higher than that of the emitter.(3)Liquid crystal displays emitting white fluorescence are successfully demonstrated by mixing two or three fluorescent dyes in the homogeneous, TN and homeotropic alignment LC cell. The white fluorescence intensity changes by applying the voltage while the color maintains white. The steepness is improved by using TN orientation. The contrast ratio of 13.3 in the homeotropic alignment LC cell is the highest in three types of LC cell.
据报道,将二分色磷溶解为宾夕化材料的发射液晶显示器(LCD)。通过使用敏化效果证明了LCDSARE增强的亮度和对比。(1)可以通过添加蓝色荧光二色染料或荧光LC作为敏化剂来获得LC宿主中香豆素6中绿色荧光强度的显着增加。将灵敏度应用于颜色从绿色转变为蓝色的发射类型LCD,绿色荧光和颜色开关特性的亮度得到了改善。通过添加敏化器,还可以改善与蓝色LED和红色荧光LC电池组装的LCD中蓝色到红色之间的颜色切换。这些结果表明,通过使用敏化效果,也可以通过使用敏化效应来获得浓缩效应的浓度效果的浓度来增加激发背光的光利用率。在荧光LC细胞中测量了和没有敏化剂,在荧光LC细胞中测量了吸收和发射二甲状腺比率之间的关系。当将电压施加到电池上时,平行于LC方向的偏振紫外光降低并变得低于垂直于LC方向的偏振紫外线激发的荧光强度。此外,澄清的是,如果亮度和对比度都可以增强,如果敏化剂的二分法比高于发射极。白色荧光强度通过施加电压而变化,而颜色保持白色。通过使用TN方向改善陡度。同型比对LC细胞中13.3的对比比在三种类型的LC细胞中最高。

项目成果

期刊论文数量(21)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Rumiko Yamaguchi et al.: "Sensitizing effect of fluorescent dichroic dye in nematic liquid crystal"Abstracts of 10th International Topical Meeting on Optics Liquid Crystals. 58 (2003)
Rumiko Yamaguchi等人:“荧光二色性染料在向列液晶中的敏化效应”第十届国际光学液晶专题会议摘要。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Sensitization effects of fluorescent dichroic dyes in a nematic liquid crystal and fluorescence colors
向列液晶中荧光二色性染料的敏化效应和荧光颜色
Sensitization effects of fluorescent dichroic dyes in nematic liquid crysta
荧光二色性染料在向列液晶中的敏化效应
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    奥地茂人;作道訓之;他;R.Yamaguchi
  • 通讯作者:
    R.Yamaguchi
Sensitizing Effect and Dichroic Ratio of Fluorescent Nematic Liquid Crystals
荧光向列液晶的敏化效应和二色性比
White Fluorescent Display Properties in Liquid Crystal Cells Using Dichroic Dyes.
使用二色性染料的液晶单元的白色荧光显示特性。
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YAMAGUCHI Rumiko其他文献

Thresholdless Electro-Optical Property in Quasi Homogeneous and Homeotropic Liquid Crystal Cells Using Weak Anchoring Surfaces
使用弱锚定表面的准均质和垂直液晶盒中的无阈值电光特性
  • DOI:
    10.1587/transele.2019dis0002
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    0.5
  • 作者:
    升本恵子;児島一聡;奥村元;YAMAGUCHI Rumiko
  • 通讯作者:
    YAMAGUCHI Rumiko

YAMAGUCHI Rumiko的其他文献

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{{ truncateString('YAMAGUCHI Rumiko', 18)}}的其他基金

Control of alignment direction of liquid crystals and anchoring strength: approach from liquid crystal materials
液晶取向方向和锚定强度的控制:来自液晶材料的方法
  • 批准号:
    24560003
  • 财政年份:
    2012
  • 资助金额:
    $ 1.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
liquid crystal electric paper with optically writing and erasing mode caused by anchoring change
锚定变化引起光学书写和擦除模式的液晶电纸
  • 批准号:
    21560346
  • 财政年份:
    2009
  • 资助金额:
    $ 1.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Study on real time evaluation method of photostability in liquid crystal cell
液晶盒光稳定性实时评价方法研究
  • 批准号:
    19560009
  • 财政年份:
    2007
  • 资助金额:
    $ 1.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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