45.3: Azo Dye Materials for the Alignment of Liquid Crystal

Yip, W.C.; Prudnikova, Elena K.; Kozenkov, Vladimir M.; Chigrinov, Vladimir G.; Kwok, Hoi Sing; Akiyama, Hidenari; Fukuda, Masanobu; Takada, Hirokazu; Takatsu, Haruyoshi

doi:10.1889/1.1831768

Cited by 13 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A substrate with rubbed polyimide alignment layer and Figure 5 compares the transmission voltage characteristics of the of 90 0 twisted nematic LC cell (TN-LC) based on photo-aligned azo dyes SD1, SD2 film and rubbed polyimide PI 2424 layer. The azo-dye structure of SD2 is very close to SD1 and was described earlier [1]. The transmission-voltage curves (TVCs) are similar and very good contrast as the result of a perfect LC alignment can be measured directly.…”

Section: Anchoring Energysupporting

confidence: 68%

See 1 more Smart Citation

Azo‐dye aligning layers for liquid‐crystal cells

et al. 2003

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Anchoring Energysupporting

confidence: 68%

“…Recently we have shown the possibility of obtaining a high quality non-contact photo-alignment layers using the azo dye structures [1]. Photochemical stable azo dye layers are an excellent example of pure reorientation of the absorption oscillator of the azo dye molecules perpendicular to the polarization of the activating UVlight.…”

Section: Introductionmentioning

confidence: 99%

Azo‐dye aligning layers for liquid‐crystal cells

et al. 2003

Self Cite

View full text Add to dashboard Cite

show abstract

“…[4] LCs are aligned along the grooves due to the minimisation of the elastic energy. [5,6] Despite the convenience and reliability, the caused electrostatic charges and dust particles [7] in rubbing process might seriously diminish the fundamental characteristics of the LCDs. [8,9] As an alternative technology, the photo-alignment can overcome these disadvantages due to its contactfree and photo-patternable characteristics, achieved by the exposure of a photo-reactive film or by generating a surface relief grating (SRG) on the substrate with linearly or non-polarised UV (NPUV) light.…”

Section: Introductionmentioning

confidence: 99%

Controllable alignment of liquid crystals based on the surface relief gratings from a photocross-linkable organic monomer

et al. 2014

View full text Add to dashboard Cite

The orientational control of liquid crystal (LC) molecules is essential for high-quality liquid crystal displays, and the photo-induced surface relief grating (SRG) is a facile and effective non-contact process. Here, SRGs with different period and depth were prepared with a photocross-linkable organic monomer 4-propyldiphenylacetylenecarboxylic acid cinnamyl ester (PDACE), and the LC alignment induced by SRG was studied. It is found that both the surface topography and the chemical nature of the surface are responsible for the LC alignment, which is strongly dependent on the groove geometry of the gratings. Furthermore, the patterned LC cell was fabricated with the patterned SRG surface. These results demonstrate that the planar, perpendicular and patterned orientations of LC can be easily photo-controllably obtained with PDACE, which have important applications in optical devices.

show abstract

“…The photo-induced alignment of liquid crystal on film of azo dyes with peculiar molecular structure has been studied for the liquid crystal display applications [1][2][3]. The azo dye molecules reorient resulting in their absorption oscillator perpendicular to the polarization of the activating polarized UV light.…”

Section: Introductionmentioning

confidence: 99%