High resolution, large area flc display with high graphic performance

Kanbe, Junichiro; Inoue, Hiroshi; Mizutome, Atsushi; Hanyuu, Yukio; Katagiri, Kazuharu; Yoshihara, Sachio

doi:10.1080/00150199108221566

Cited by 132 publications

(44 citation statements)

References 5 publications

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“…Figure 7 shows a schematic model of the zigzag defect in an anti-parallel rubbed FLC cell having a difference of the pretilt angle between two alignment films. It is well known that the C2 chevron structure formation can be prohibited on a considerably high pretilt surface of alignment film in a parallel rubbed FLC cell [4][5][6]. Therefore, it is guessed that this anti-parallel rubbed FLC cell can be put in the same situation as a parallel rubbed FLC cell having high pretilt alignment films, but this high pretilt effect may work more effectively due to the utilization of the difference of pretilt angles.…”

Section: Experimentalsmentioning

confidence: 93%

“…In parallel rubbed FLC cells, two chevrons have different molecular alignment structures and different energies [4]. Therefore, it is comparatively easy to obtain only one chevron structure and then a defect-free monodomain [4][5][6][7][8][9][10][11]. However the fabrication techniques using parallel rubbed FLC cells are neither universally effective nor available because of restrictions on FLC and alignment film materials and available temperature region.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Defect-Free Surface-Stabilized Ferroelectric Liquid Crystals Using Alignment Films Rubbed in Anti-Parallel

2008

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Fabrication of operable surface-stabilized ferroelectric liquid crystals (SSFLC) is often hampered by the occurance of zigzag defects. This defect formation can, to some extent, be controlled or eliminated in SSFLCs in which the rubbing directions are set parallel. In this study, we try to fabricate a defect-free SSFLC with anti-parallel rubbing films which possess different surface anchoring and pretilt angle between two cell substrates in order for the energy condition in two types of chevron to be different. It is confirmed that in all alignment films used in this research, the occurrence of zigzag defects can be suppressed as the difference of rubbing strengths increases between two alignment films. Furthermore, it is found that the appearance of zigzag defects can be more strongly suppressed as the difference of pretilt angles increases between two alignment films, and then in the case of the large difference, zigzag defect-free SSFLCs can be obtained.

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Section: Experimentalsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Fabrication of Defect-Free Surface-Stabilized Ferroelectric Liquid Crystals Using Alignment Films Rubbed in Anti-Parallel

2008

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“…Uniformly aligned cells without zigzag defects can be wide viewing angle [1], but it is very di cult to obtain both well aligned layers and a planar orientation of obtained by achieving a uniformly bent layer structure and therefore it is essential to understand the conditions the molecules. In LCs ferroelectricity usually exists in a chiral smectic C phase (SmC*) with dipoles normal to of C1 and C2 orientation [8,9 ]. In parallel rubbed cells, two opposite layer bends nearly parallel to the layer the molecular long axis and having a layer structure.…”

Section: Introductionmentioning

confidence: 99%

Zigzag defect-free alignment of surface stabilized ferroelectric liquid crystal cells with a polyimide irradiated by polarized UV light

Kang¹,

Kim²,

Kim³

2001

Liquid Crystals

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Zigzag defect-free surface stabilized ferroelectric liquid crystal (SSFLC) cells were prepared using a photodegradable polyimide (PI) having a cyclobutane ring in the backbone. The PI layers were irradiated by polarized ultraviolet light (PUVL) at normal incidence to the surface, and characterized by UV and FTIR spectroscopy. The anisotropy originates from preferential cleavage of PI chains oriented parallel to the polarization direction of the irradiating PUVL. After the polarized UV light irradiation, the PI surface was much atter than that after rubbing, but it induced a similar order parameter of dye-doped nematic LC molecules to that for a rubbed cell. Alignment of both the FLC molecules and the layer structure is important in SSFLC. After 40 min irradiation, the FLC molecules were well aligned homogeneously, and the FLC cells showed a uniform texture without zigzag defects which also indicates a well aligned layer structure. Zigzag defect-free alignment may result from the atter surface, the much smaller and more constant pretilt angles, and the bigger cone angle than those achieved by rubbing.

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“…X-ray studies, figure 3b, show that the layer tilt (±δ) is uniform throughout the bulk of the device, meeting in a sharp cusp at the central plane. For cells with a finite pre-tilt, there are two orientations of chevron layer structure termed C1 and C2 [7] shown in figures 2 and 3. The C1 state is the first to form on cooling from the S A and the layer normal tilts in the same direction as the surface pre-tilt.…”

Section: Alignmentmentioning

confidence: 99%

On the biaxiality of smectic C and ferroelectric liquid crystals

Jones

2015

Liquid Crystals

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High resolution, large area flc display with high graphic performance

Cited by 132 publications

References 5 publications

Fabrication of Defect-Free Surface-Stabilized Ferroelectric Liquid Crystals Using Alignment Films Rubbed in Anti-Parallel

Fabrication of Defect-Free Surface-Stabilized Ferroelectric Liquid Crystals Using Alignment Films Rubbed in Anti-Parallel

Zigzag defect-free alignment of surface stabilized ferroelectric liquid crystal cells with a polyimide irradiated by polarized UV light

On the biaxiality of smectic C and ferroelectric liquid crystals

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